COMMISSIONS 27 AND 42 OF THE IAU INFORMATION BULLETIN ON VARIABLE STARS. Reports on New Discoveries

Size: px
Start display at page:

Download "COMMISSIONS 27 AND 42 OF THE IAU INFORMATION BULLETIN ON VARIABLE STARS. Reports on New Discoveries"

Transcription

1 1 COMMISSIONS 27 AND 42 OF THE IAU INFORMATION BULLETIN ON VARIABLE STARS Konkoly Observatory Budapest HU ISSN Reports on New Discoveries (This will appear as IBVS No ) Previous reports can be found in Date: 27 September 2011 Monninger, G. - Bundesdeutsche Arbeitsgemeinschaft für Veränderliche Sterne e.v. (BAV), Munsterdamm 90, DE Berlin, Germany, gerold.monninger@online.de DSCT (Vmag - GSC2.3) (1) d (7) GSC = USNO-A = USNO-B = Tycho = 2MASS = GSC2.3 N2XB Date: 8 December 2011 Liakos, A. - Department of Astrophysics, Astronomy and Mechanics, National and Kapodistrian University of Athens, Panepistimioupolis, GR , Zografos, Athens, Hellas, alliakos@phys.uoa.gr Niarchos, P. - Department of Astrophysics, Astronomy and Mechanics, National and Kapodistrian University of Athens, Panepistimioupolis, GR , Zografos, Athens, Hellas, pniarcho@phys.uoa.gr Remark: Detected in the FoV of V482 Per DSCT B= mag (The Hipparcos and Tycho Catalogues) h - GSC = TYC = USNO-A Remark: Detected in the FoV of TW Lac and V413 Lac DSCT B=13.9 mag (The USNO-A2.0 Catalogue) h - GSC = USNO-A

2 2 Remark: Detected in the FoV of QX And DSCT R=15.5 mag (The USNO-A2.0 Catalogue) h - USNO-A Date: 13 January 2012 Martignoni, Massimiliano - Stazione Astronomica Betelgeuse, Magnago, Milano, Italy, massimiliano.martignoni@alice.it Remark: UCAC is an EW type eclipsing binary in the field of view of TV Lyn EW (V) d UCAC Date: 20 February 2012 Monninger, G. - Bundesdeutsche Arbeitsgemeinschaft für Veränderliche Sterne e.v. (BAV), Munsterdamm 90, DE Berlin, Germany, gerold.monninger@online.de Remark: In the field of the high amplitude delta scuti variable (HADS) GSC (this IBVS issue, Monninger, 2011). USNO-B is listed in the Catalogue of SDSS BHB candidates (Smith et al., 2010). A modulation in the light curve was observed RRab (Vmag - GSC2.3) (1) d (1) USNO-B = USNO-A = 2MASS = GSC2.3 N8R Date: 4 June 2012 klaus.bernhard@liwest.at

3 3 Remark: GSC (2MASS J-K = 0.264) has been identified as a double-mode RR Lyrae (RRd) star by analysis of CRTS data (Drake et al., 2009) with 04 (Lenz et al., 2005): frequency (c/d) semi-amplitude (mag) F (first overtone) F (fundamental) F (F1+F2) F (2F2) With a fundamental period of d, the star is near the lower edge of known RRd stars in the Petersen diagram; the ratio F2/F1=0.743 is in agreement with other RRd variables. GSC is RRd (Vmag - GSC) d - GSC = USNO-B = 2MASS J = WISE J = CSS J Date: 12 June 2012 klaus.bernhard@liwest.at Remark: USNO-B (2MASS J-K = 0.119) has been identified as a double-mode RR Lyrae (RRd) star by analysis of CRTS data (Drake et al., 2009) with 04 (Lenz et al., 2005): frequency (c/d) semi-amplitude (mag) F (first overtone) F (fundamental) F (2F1) F (F1+F2) Analysis and folded lightcurves were based on CRTS data from HJD to as the period is possibly variable. With a fundamental period of d, the star is situated in the middle of the Petersen diagram; the ratio F1/F2=0.745 is in agreement with other RRd variables. USNO-B is RRd (Vmag - NOMAD) d - USNO-B = UCAC = 2MASS J = WISE J = CSS J Date: 23 July 2012 Nelson, R.H. - Sylvester Robotic Observatory, Prince George, BC, Canada, bob.nelson@shaw.ca Lubcke, G E Washington Ave, Madison, WI 53703, lubcke@tds.net

4 4 Remark: In the vicinity of V471 Cas EW (R mag = GSC2.3) (2) (12) GSC Date: 15 August 2012 klaus.bernhard@liwest.at Remark: USNO-B (2MASS J-K = 0.193) has been identified as a double-mode RR Lyrae (RRd) star by analysis of CRTS data (Drake et al., 2009) with 04 (Lenz et al., 2005): frequency (c/d) period (d) semi-amplitude (mag) epoch (max) F (first overtone) F (fundamental) With a fundamental period of d, the star is near the lower edge of known RRd stars in the Petersen diagram; the ratio F2/F1= is in agreement with other RRd variables. No linear combination modes could be found in the data. USNO-B is listed in the Catalogue of SDSS BHB candidates (Smith et al., 2010) RRd (CV - CRTS) d - USNO-B = UCAC = 2MASS J = WISE J = CSS J Date: 15 August 2012 klaus.bernhard@liwest.at Remark: GSC (2MASS J-K = 0.225) has been identified as a double-mode RR Lyrae (RRd) star by analysis of CRTS data (Drake et al., 2009) with 04 (Lenz et al., 2005): frequency (c/d) period (d) semi-amplitude (mag) epoch (max) F (first overtone) F (fundamental) With a fundamental period of d, the star is situated in the middle of known RRd stars in the Petersen diagram; the ratio F2/F1=0.745 is in agreement with other RRd variables. No linear combination modes could be found in the data. GSC is listed in the Catalogue of SDSS BHB candidates (Smith et al., 2010).

5 RRd (CV - CRTS) d - GSC = USNO-B = UCAC = 2MASS J = WISE J = CSS J Date: 15 August 2012 Drake, A.J. - Catalina Real-Time Transient Survey Remark: UCAC4 position. J-K=0.216 (2MASS). Rise duration: 39%. USNO-B is RRc (CV) d USNO-B = UCAC = 2MASS J = WISE J = CSS J Remark: UCAC4 position. J-K=0.339 (2MASS). Rise duration: 11%. USNO-B is RRab (CV) d USNO-B = UCAC = 2MASS J = WISE J = CSS J Remark: UCAC4 position. J-K=0.556 (2MASS). Rise duration: 13%. USNO-B is RRab (CV) d USNO-B = UCAC = 2MASS J = WISE J = CSS J Remark: 2MASS position. J-H=0.084 (2MASS; J-H value given as Kmag is flagged as being of bad quality.) Rise duration: 15%. USNO-B is listed in the Catalogue of SDSS BHB candidates (Smith et al., 2010) RRab (CV) d USNO-B = 2MASS J = WISE J = CSS J

6 6 Remark: UCAC4 position. J-K=0.277 (2MASS). Rise duration: 14%. USNO-B is RRab (CV) d USNO-B = UCAC = 2MASS J = WISE J = CSS J Remark: UCAC4 position. J-K=0.291 (2MASS). Rise duration: 13%. USNO-B is RRab (CV) d USNO-B = UCAC = 2MASS J = WISE J = CSS J Date: 14 January 2013 Hümmerich, S. - Bundesdeutsche Arbeitsgemeinschaft für Veränderliche Sterne e.v. (BAV), Munsterdamm 90, DE Berlin, Germany, ernham@rz-online.de Remark: GSC has been identified as an RRc star by analysis of CRTS data (Drake et al., 2009). UCAC4 position. J K = (2MASS; Skrutskie et al., 2006). Rise duration: 47GSC is RRc (CV) d GSC = USNO-B = UCAC = 2MASS J = WISE J = CSS J Remark: USNO-B has been identified as an RRc star by analysis of CRTS data (Drake et al., 2009). UCAC4 position. J K=0.265 (2MASS; Skrutskie et al., 2006). Rise duration: 39USNO-B is RRab (CV) d USNO-B = UCAC = 2MASS J = WISE J = CSS J Remark: USNO-B has been identified as an RRc star by analysis of CRTS data (Drake et al., 2009). UCAC4 position. J K=0.183 (2MASS; Skrutskie et al., 2006). Rise duration: 40USNO-B is

7 RRc (CV) d USNO-B = UCAC = 2MASS J = WISE J = CSS J Date: 7 February 2013 Martignoni, Massimiliano - Stazione Astronomica Betelgeuse, Magnago, Milano, Italy, massimiliano.martignoni@alice.it Remark: TYC is an EA type eclipsing binary in the field of view of DV Mon. It was observed with a 0.25m Schmidt-Cassegrain Telescope (f/10) of the Stazione Astronomica Betelgeuse in Magnago, Italy equipped with a 512x512 pixels Kodak KAF261E CCD cooled to (typ.) -20C; 1.6 arcsec per pixel (1x1 binning); 14 x14 field of view, with a V photometric filter. Reduction to standard photometric system was performed. As comparison and check stars were used UCAC (V=11.47) and UCAC (V=12.79). Using also V magnitude data coming from the All Sky Automated Survey (ASAS), a total of 916 measures were collected. The star shows a secondary minimum approximately at phase EA (V) d TYC = UCAC Date: 25 March 2013 Nelson, R.H Garvin St., Prince George, BC, V2M 3Z1 Canada, bob.nelson@shaw.ca Lubcke, Gil South Avenue, Middleton, Wisconsin, USA, lubcke@tds.net Molnar, Larry - Calvin College, Grand Rapids, MI, , lmolnar@calvin.edlu Remark: Star was discovered to be variable by R.H. Nelson on while observing GSC He obtained a light curve around a primary minimum in R (Cousins). Follow-up data was acquired by G. Lubcke and L. Molnar. The latter discovered the period and obtained a largely full light curve in R (Cousins) with some additional data in V EA B mag = 11.06, V mag = (SIM- BAD) d GSC = TYC = 2MASS J

8 8 Date: 23 August 2013 Srdoc, Gregor - Sarsoni 90 Viskovo, Croatia, gregor@vip.hr Frank, Peter - Bundesdeutsche Arbeitsgemeinschaft für Veränderliche Sterne e.v. (BAV), Munsterdamm 90, DE Berlin, Germany, frank.velden@t-online.de Klaus.Bernhard@liwest.at Remark: GSC has been discovered as a candidate variable star by investigation of light curves from the SuperWASP public archive (Butters et al., 2010). Follow-up observations by G. Srdoc (V filter; 19 nights; black circles in folded light curve) and P. Frank ( IR filter; 2 nights; grey circles) indicate that GSC is a DSCT variable. J K=0.101 (2MASS; Skrutskie et al., 2006). Positional information was drawn from the UCAC4 catalogue (Zacharias et al., 2013). The difference in mean magnitude between the two datasets results from the use of different filters and telescope systems. The given magnitude range has been derived from G. Srdoc s observations because of the use of a V -filter RRab (CV) d GSC = UCAC = 2MASS Date: 9 September 2013 Nelson, Robert H. - Sylvester Robotic Observatory, Prince George, BC, Canada bob.nelson@shaw.ca Buchheim, Robert - Altimira Observatory (minor planet center observatory code G76) Bob@kbuchheim.org Remark: Minima Determination: Fourier 5-term fit (Nelson), Kwee & van Woerden (both) EA (USNO A2.0: B=15.2, R=13.8) (2) d (6) GSC = USNO A Date: 25 September 2013 Nelson, Robert H. - Sylvester Robotic Observatory, Prince George, BC, Canada bob.nelson@shaw.ca Buchheim, Robert - Altimira Observatory (minor planet center observatory code G76) Bob@kbuchheim.org EB? (USNO A2.0: B=14.5, R=13.1) (1) d (36) GSC = USNO A

9 9 References: Butters, O.W. et al., 2010, A&A, 520L, 10B Drake, A.J. et al., 2009, ApJ, 696, 870 Kwee, K. K., Van Woerden, H., 1956, BAN 12, 327 Lenz, P. et al., 2005, CoAst, 146, 53 Monninger, G., 2011, IBVS, 6100, 1 Skrutskie, M.F. et al., 2006, AJ, 131, 1163 Smith, K.W., Bailer-Jones, C.A.L., Klement, R.J., Xue, X.X., 2010, A&A, 522, A88

BAV Journal. First Elements for five New Variable Stars in Several Fields, Part VII

BAV Journal.   First Elements for five New Variable Stars in Several Fields, Part VII BAV Journal 2018 No. 23 ISSN 2366-6706 Bundesdeutsche Arbeitsgemeinschaft für Veränderliche Sterne e.v. http://bav-astro.de First Elements for five New Variable Stars in Several Fields, Part VII Frank,

More information

BAV Journal. First elements for six new Eclipsing Binaries in several fields

BAV Journal.   First elements for six new Eclipsing Binaries in several fields BAV Journal 2016 No. 11 ISSN 2366-6706 Bundesdeutsche Arbeitsgemeinschaft für Veränderliche Sterne e.v. http://bav-astro.de First elements for six new Eclipsing Binaries in several fields Moschner, Wolfgang

More information

GSC : an RR Lyrae star with a ceasing Blazhko effect and three new variables in the field.

GSC : an RR Lyrae star with a ceasing Blazhko effect and three new variables in the field. GSC 02626-00896: an RR Lyrae star with a ceasing Blazhko effect and three new variables in the field. Rainer Gröbel 1, 2 1) DE- 90542 Eckental, Germany rainer.groebel@web.de 2) Bundesdeutsche Arbeitsgemeinschaft

More information

Light Curve Analysis of GSC and GSC

Light Curve Analysis of GSC and GSC Light Curve Analysis of GSC 2750-0054 and GSC 03208-02644 M. M. Elkhateeb,2 and M. I. Nouh,2 E-mail: abdo_nouh@hotmail.com Physics Department, College of Science, Northern Border University, Arar, Saudi

More information

Characterization of variable stars using the ASAS and SuperWASP databases

Characterization of variable stars using the ASAS and SuperWASP databases Characterization of variable stars using the ASAS and SuperWASP databases Derck P. Smits Dept of Mathematical Sciences, PO Box 392, UNISA, 0003, South Africa E-mail: smitsdp@unisa.ac.za Abstract. A photographic

More information

Frequency analysis of five short periodic pulsators

Frequency analysis of five short periodic pulsators Comm. in Asteroseismology Volume 162, February 2011 c Austrian Academy of Sciences Frequency analysis of five short periodic pulsators A.Liakos & P.Niarchos National and Kapodistrian University of Athens,

More information

First Orbital Solution and Evolutionary State for the Newly Discovered Eclipsing Binaries USNO-B and GSC

First Orbital Solution and Evolutionary State for the Newly Discovered Eclipsing Binaries USNO-B and GSC First Orbital Solution and Evolutionary State for the Newly Discovered Eclipsing Binaries USNO-B1.0 1091-0130715 and GSC-03449-0680 M. M. Elkhateeb 1, 2, M. I. Nouh 1, 2 and R. H. Nelson 1 Astronomy Department,

More information

Baltic Astronomy, vol. 24, , 2015 A STUDY OF DOUBLE- AND MULTI-MODE RR LYRAE VARIABLES. A. V. Khruslov 1,2

Baltic Astronomy, vol. 24, , 2015 A STUDY OF DOUBLE- AND MULTI-MODE RR LYRAE VARIABLES. A. V. Khruslov 1,2 Baltic Astronomy, vol. 24, 379 386, 2015 A STUDY OF DOUBLE- AND MULTI-MODE RR LYRAE VARIABLES A. V. Khruslov 1,2 1 Institute of Astronomy, Russian Academy of Sciences, Pyatnitskaya str. 48, Moscow 119017,

More information

Discovery of a deep, low mass ratio overcontact binary GSC

Discovery of a deep, low mass ratio overcontact binary GSC Research in Astron. Astrophys. 2014 Vol. X No. XX, 000 000 http://www.raa-journal.org http://www.iop.org/journals/raa Research in Astronomy and Astrophysics Discovery of a deep, low mass ratio overcontact

More information

Discovery of a deep, low mass ratio overcontact binary GSC

Discovery of a deep, low mass ratio overcontact binary GSC RAA 2015 Vol. 15 No. 6, 889 895 doi: 10.1088/1674 4527/15/6/011 http://www.raa-journal.org http://www.iop.org/journals/raa Research in Astronomy and Astrophysics Discovery of a deep, low mass ratio overcontact

More information

Igor Soszyński. Warsaw University Astronomical Observatory

Igor Soszyński. Warsaw University Astronomical Observatory Igor Soszyński Warsaw University Astronomical Observatory SATELLITE vs. GROUND-BASED ASTEROSEISMOLOGY SATELLITE: Outstanding precision! High duty cycle (no aliases) HST MOST Kepler CoRoT Gaia IAU GA 2015,

More information

UX Trianguli PULSATION PERIOD CHANGE SINCE 2005 AND RE-ANALYSIS OF THE BLAZHKO EFFECT

UX Trianguli PULSATION PERIOD CHANGE SINCE 2005 AND RE-ANALYSIS OF THE BLAZHKO EFFECT UX Trianguli PULSATION PERIOD CHANGE SINCE 2005 AND RE-ANALYSIS OF THE BLAZHKO EFFECT ACHTERBERG, HERBERT 1,3, HUSAR, DIETER 2,3 1 present address: Dr. H. Achterberg, Liegnitzer Strasse 12, D-22850 Norderstedt

More information

The VESPA Survey: 100 New Variable Stars Discovered in Two Years

The VESPA Survey: 100 New Variable Stars Discovered in Two Years Quadri et al., JAAVSO Volume 45, 2017 15 The VESPA Survey: 100 New Variable Stars Discovered in Two Years Ulisse Quadri IAU station 565, Bassano Bresciano Astronomical Observatory; AAVSO; Unione Astrofili

More information

23 New Variable Stars

23 New Variable Stars 350 23 New Variable Stars Clark, JAAVSO Volume 42, 2014 Maurice Clark Texas Tech University, Physics Department, P.O. Box 41051, Lubbock, TX 79409; maurice.clark@ttu.edu Received May 20, 2014, accepted

More information

BAV Journal. Revision Variable Stars. Part 1. Sergey I. 1. Mira Str. 40-2, Molodechno, , Belarus,

BAV Journal.   Revision Variable Stars. Part 1. Sergey I. 1. Mira Str. 40-2, Molodechno, , Belarus, BAV Journal 2018 No. 25 ISSN 2366-6706 Bundesdeutsche Arbeitsgemeinschaft für Veränderliche Sterne e.v. http://bav-astro.de Revision Variable Stars. Part 1. Sergey I. 1 Mira Str. 40-2, Molodechno, 222307,

More information

UY Camelopardalis Possibly Has an Unseen Companion Kanokwan Marak 1*, Chayan Boonyarak 1 and Shi-yang Jiang 2

UY Camelopardalis Possibly Has an Unseen Companion Kanokwan Marak 1*, Chayan Boonyarak 1 and Shi-yang Jiang 2 NU Science Journal 2009; 6(1): 33-39 UY Camelopardalis Possibly Has an Unseen Companion Kanokwan Marak 1*, Chayan Boonyarak 1 and Shi-yang Jiang 2 1 Faculty of Sciences, Naresuan University, Phitsanulok

More information

NEW CCD PHOTOMETRIC OBSERVATIONS OF W-UMA ECLIPSING BINARY NSV 5904 USING THE 1.88-m KOTTAMIA TELESCOPE, EGYPT INTRODUCTION

NEW CCD PHOTOMETRIC OBSERVATIONS OF W-UMA ECLIPSING BINARY NSV 5904 USING THE 1.88-m KOTTAMIA TELESCOPE, EGYPT INTRODUCTION NEW CCD PHOTOMETRIC OBSERVATIONS OF W-UMA ECLIPSING BINARY NSV 5904 USING THE 1.88-m KOTTAMIA TELESCOPE, EGYPT A. Essam 1, A. Naklawy 1, A. A. Haroon 1, M. A. Hamdy 1, G. B. Ali 1, H. A. Ismail 1, I. M.

More information

Photometry of the Dwarf Nova SDSS J in Outburst

Photometry of the Dwarf Nova SDSS J in Outburst Wils and Krajci, JAAVSO Volume 38, 2010 33 Photometry of the Dwarf Nova SDSS J094002.56+274942.0 in Outburst Tom Krajci Astrokolkhoz Observatory, P.O. Box 1351, Cloudcroft, New Mexico 88317; tom_krajci@tularosa.net

More information

V551 Aur, an oea binary with g-mode pulsations?

V551 Aur, an oea binary with g-mode pulsations? Research in Astron. Astrophys. 2012 Vol. 12 No. 6, 671 677 http://www.raa-journal.org http://www.iop.org/journals/raa Research in Astronomy and Astrophysics V551 Aur, an oea binary with g-mode pulsations?

More information

New Eclipsing Variable Star with Delta Scuti Component

New Eclipsing Variable Star with Delta Scuti Component Peremennye Zvezdy (Variable Stars) 33, No. 4, 2013 Received 04 June; accepted 25 June. New Eclipsing Variable Star with Delta Scuti Component V. Solovyov 1, A. Samokhvalov 2,3, B. Satovskiy 3 1 Kazan Federal

More information

Discovery and Photometric Analysis of the δ Scuti Variable TYC

Discovery and Photometric Analysis of the δ Scuti Variable TYC Joner et al., JAAVSO Volume 44, 2016 131 Discovery and Photometric Analysis of the δ Scuti Variable TYC 2168-132-1 Michael D. Joner Eric G. Hintz Department of Physics and Astronomy, Brigham Young University,

More information

CCD Double-Star Measurements at Altimira Observatory in 2007

CCD Double-Star Measurements at Altimira Observatory in 2007 Page 27 CCD Double-Star Measurements at Altimira Observatory in 2007 Robert K. Buchheim Altimira Observatory (G76) 18 Altimira Coto de Caza, CA 92679 Email: RBuchheim@earthlink.net Abstract: CCD measurements

More information

RECLASSIFICATION OF ROTSE-I SCUTI STARS WITH MULTIBAND PHOTOMETRY AND FOURIER DECOMPOSITION

RECLASSIFICATION OF ROTSE-I SCUTI STARS WITH MULTIBAND PHOTOMETRY AND FOURIER DECOMPOSITION The Astronomical Journal, 128:1847 1856, 2004 October # 2004. The American Astronomical Society. All rights reserved. Printed in U.S.A. RECLASSIFICATION OF ROTSE-I SCUTI STARS WITH MULTIBAND PHOTOMETRY

More information

DK And: Reclassification as EW Binary from CCD Observations

DK And: Reclassification as EW Binary from CCD Observations DK And: Reclassification as EW Binary from CCD Observations Hambsch, F.-J. 1 and Husar, D. 2,3 1 present adress: Dr. Franz-Josef Hambsch, Oude Bleken 12, 2400 Mol-Millegem (Belgium) 2 Himmelsmoor Private

More information

arxiv: v2 [astro-ph.sr] 16 May 2013

arxiv: v2 [astro-ph.sr] 16 May 2013 Pulsation Analysis of the High Amplitude δ Scuti Star CW Serpentis J. S. Niu arxiv:1304.3770v2 [astro-ph.sr] 16 May 2013 Astronomy Department, Beijing Normal University, Beijing 100875, China J. N. Fu

More information

arxiv: v2 [astro-ph.sr] 9 Nov 2015

arxiv: v2 [astro-ph.sr] 9 Nov 2015 Research in Astronomy and Astrophysics manuscript no. (L A TEX: AST3-VARIABLE-STARS.tex; printed on July 30, 2018; 6:34) arxiv:1510.06134v2 [astro-ph.sr] 9 Nov 2015 VARIABLE STARS OBSERVED WITH THE AST3-1

More information

Blazar Optical Sky Survey BOSS Project ( ) and the long-term optical variability monitoring

Blazar Optical Sky Survey BOSS Project ( ) and the long-term optical variability monitoring Blazar Optical Sky Survey BOSS Project (2013-2016) and the long-term optical variability monitoring Kosmas Gazeas University of Athens Observatory - UOAO Department of Astrophysics, Astronomy and Mechanics

More information

arxiv: v1 [astro-ph.sr] 10 Apr 2014

arxiv: v1 [astro-ph.sr] 10 Apr 2014 A photometric study of the neglected eclipsing binaries: V405 Cep, V948 Her, K Mon and UZ Sge A. Liakos, P. Niarchos Dept. of Astrophysics, Astronomy and Mechanics, University of Athens, G 157 84 Zografos,

More information

The Pulsation Properties of the Double-Mode RR Lyrae Variable V79 in Messier 3

The Pulsation Properties of the Double-Mode RR Lyrae Variable V79 in Messier 3 336 The Pulsation Properties of the Double-Mode RR Lyrae Variable V79 in Messier 3 Christine M. Clement Department of Astronomy and Astrophysics, University of Toronto, Toronto, ON, M5S 3H8, Canada Mike

More information

arxiv: v1 [astro-ph.sr] 1 Jul 2012

arxiv: v1 [astro-ph.sr] 1 Jul 2012 BD+36 3317: An Algol Type Eclipsing Binary in Delta Lyrae Cluster arxiv:1207.0194v1 [astro-ph.sr] 1 Jul 2012 O. Özdarcan, E. Sipahi, H. A. Dal Ege University, Science Faculty, Department of Astronomy and

More information

Ultra-compact binaries in the Catalina Real-time Transient Survey. The Catalina Real-time Transient Survey. A photometric study of CRTS dwarf novae

Ultra-compact binaries in the Catalina Real-time Transient Survey. The Catalina Real-time Transient Survey. A photometric study of CRTS dwarf novae Patrick Woudt, Brian Warner & Deanne de Budé 3rd AM CVn workshop, University of Warwick, 16-20 April 2012 The Catalina Real-time Transient Survey A photometric study of CRTS dwarf novae Phase-resolved

More information

Analysis of BVI Photometry of the Eclipsing Binary EV Lyrae

Analysis of BVI Photometry of the Eclipsing Binary EV Lyrae 68 Analysis of BVI Photometry of the Eclipsing Binary EV Lyrae Jerry D. Horne 3055 Lynview Drive, San Jose, CA 95148 Presented at the 96th Spring Meeting of the AAVSO, June 29, 2007; received August 22,

More information

Discovery of Pulsating Components in the Southern Eclipsing Binary Systems AW Velorum, HM Puppis, and TT Horologii

Discovery of Pulsating Components in the Southern Eclipsing Binary Systems AW Velorum, HM Puppis, and TT Horologii 182 Discovery of Pulsating Components in the Southern Eclipsing Binary Systems AW Velorum, HM Puppis, and TT Horologii David J. W. Moriarty 315 Main Road, Wellington Point, Queensland 4160, Australia;

More information

A photometric study of an EW-type binary system: GV Leo

A photometric study of an EW-type binary system: GV Leo Research in Astron. Astrophys. 2013 Vol. 13 No. 11, 1330 1338 http://www.raa-journal.org http://www.iop.org/journals/raa Research in Astronomy and Astrophysics A photometric study of an EW-type binary

More information

GSC , a new multiperiodic high-amplitude Delta Scuti variable

GSC , a new multiperiodic high-amplitude Delta Scuti variable Bull. Astr. Soc. India (2013) 41, 173 182 GSC 2701-2527, a new multiperiodic high-amplitude Delta Scuti variable D. P. Kjurkchieva, 1 D. P. Dimitrov, 2 S. I. Ibryamov, 2 and M. Srinivasa Rao 3 1 Department

More information

New frequency analyses of the multiperiodic δ Scuti variables CR Lyn and GG UMa

New frequency analyses of the multiperiodic δ Scuti variables CR Lyn and GG UMa Comm. in Asteroseismology ol. 148, 2006 New frequency analyses of the multiperiodic δ Scuti variables CR Lyn and GG UMa C.W. Robertson 1,P.anCauteren 2, P. Lampens 3,E.García-Melendo 4,R. Groenendaels

More information

arxiv:astro-ph/ v1 21 Feb 2001

arxiv:astro-ph/ v1 21 Feb 2001 May 30, 2018 A New SX Phe Star in the Globular Cluster M15 Young-Beom Jeon 1, Seung-Lee Kim arxiv:astro-ph/0102351v1 21 Feb 2001 Korea Astronomy Observatory, Taejeon, 305-348, KOREA Email: ybjeon@boao.re.kr

More information

V883 Scorpii Period Determination. Mark Blackford Neil Butterworth Tom Richards

V883 Scorpii Period Determination. Mark Blackford Neil Butterworth Tom Richards V883 Scorpii Period Determination Mark Blackford Neil Butterworth Tom Richards Background According to AAVSO VSX V833 Sco is an β Lyrae-type eclipsing system with both both components being close in size

More information

Photometric Observations of the δ Scuti Star UV Trianguli and its Evolutionary Status

Photometric Observations of the δ Scuti Star UV Trianguli and its Evolutionary Status Chin. J. Astron. Astrophys. Vol. 2 (2002), No. 1, 59 65 ( http: /www.chjaa.org or http: /chjaa.bao.ac.cn ) Chinese Journal of Astronomy and Astrophysics Photometric Observations of the δ Scuti Star UV

More information

High Amplitude δ Scuti Star BO Lyn, Evidence of a Late A-Type Companion on Elliptical Orbit

High Amplitude δ Scuti Star BO Lyn, Evidence of a Late A-Type Companion on Elliptical Orbit Research in Astron. Astrophys. 2012 Vol. X No. XX, 000 000 http://www.raa-journal.org http://www.iop.org/journals/raa Research in Astronomy and Astrophysics High Amplitude δ Scuti Star BO Lyn, Evidence

More information

COMMISSIONS 27 AND 42 OF THE IAU INFORMATION BULLETIN ON VARIABLE STARS Number 6xxx

COMMISSIONS 27 AND 42 OF THE IAU INFORMATION BULLETIN ON VARIABLE STARS Number 6xxx COMMISSIONS 27 AND 42 OF THE IAU INFORMATION BULLETIN ON VARIABLE STARS Number 6xxx Konkoly Observatory Budapest x Xxxx 2012 HU ISSN 0374 0676 MINIMA OF ECLIPSING BINARIES AND NEW EPHEMERIDES FOR GSC 03881-00579

More information

Secular Variation of the Mode Amplitude-Ratio of the Double- Mode RR Lyrae Star NSVS

Secular Variation of the Mode Amplitude-Ratio of the Double- Mode RR Lyrae Star NSVS Hurdis and Krajci, JAAVSO Volume 38, 2010 1 Secular Variation of the Mode Amplitude-Ratio of the Double- Mode RR Lyrae Star NSVS 5222076 David A. Hurdis 76 Harbour Island Road, Narragansett, RI 02882;

More information

Extra RR Lyrae Stars in the Original Kepler Field of View

Extra RR Lyrae Stars in the Original Kepler Field of View Extra RR Lyrae Stars in the Original Kepler Field of View Ottó Hanyecz 1 2 and Róbert Szabó 2 1. Eötvös Loránd University, Budapest, Hungary 2. MTA CSFK, Konkoly Observatory, Budapest, Hungary Our previous

More information

186 to indicate the goodness of the period. If my examination of the data phased to the test period finds that the lightcurve appears appropriately pe

186 to indicate the goodness of the period. If my examination of the data phased to the test period finds that the lightcurve appears appropriately pe Chapter 5 Periodic Variables and Binary Sequences 5.1 Periodic Variable Stars The primary purpose of our project is to search for brightness changes resulting from photospheric stellar activity on the

More information

Red Magnitudes. Abstract : In which various sky survey red magnitudes are compared to Cousins R

Red Magnitudes. Abstract : In which various sky survey red magnitudes are compared to Cousins R Red Magnitudes Abstract : In which various sky survey red magnitudes are compared to Cousins R Methodology The current loneos.phot file created by Brian Skiff was downloaded from his ftp space and coordinates,

More information

Jonckheere Double Star Photometry Part III: Lyra, Equuleus, and Eridanus

Jonckheere Double Star Photometry Part III: Lyra, Equuleus, and Eridanus Page 351 Jonckheere Double Star Photometry Part III: Lyra, Equuleus, and Eridanus Wilfried R.A. Knapp Vienna, Austria wilfried.knapp@gmail.com Abstract: If any double star discoverer is in urgent need

More information

BV R photometry of the star TU UMi

BV R photometry of the star TU UMi BV R photometry of the star TU UMi Diana Kjurkchieva 1, Dinko Dimitrov 2, Sunay Ibryamov 1 1 University of Shumen, Bulgaria 2 Institute of Astronomy, Bulgarian Academy of Sciences d.kyurkchieva@shu-bg.net;

More information

SEVEN NEW LOW-MASS ECLIPSING BINARIES

SEVEN NEW LOW-MASS ECLIPSING BINARIES JOURNAL OF THE SOUTHEASTERN ASSOCIATION FOR RESEARCH IN ASTRONOMY, 1, 7-12, 2007 SEPTEMBER 1 c 2007. Southeastern Association for Research in Astronomy. All rights reserved. SEVEN NEW LOW-MASS ECLIPSING

More information

The observations of deeply eclipsing polars FL Ceti and CSS :

The observations of deeply eclipsing polars FL Ceti and CSS : Mem. S.A.It. Vol. 83, 670 c SAIt 2012 Memorie della The observations of deeply ipsing polars FL Ceti and CSS 081231: 071126+440405 N. Katysheva 1 and S. Shugarov 1,2 1 Lomonosov Moscow State University,

More information

arxiv: v1 [astro-ph.sr] 15 Jun 2016

arxiv: v1 [astro-ph.sr] 15 Jun 2016 Research in Astron. Astrophys. XXXX Vol. X No. XX, 000 000 http://www.raa-journal.org http://www.iop.org/journals/raa Research in Astronomy and Astrophysics arxiv:1606.04792v1 [astro-ph.sr] 15 Jun 2016

More information

Results of the OGLE-II and OGLE-III surveys

Results of the OGLE-II and OGLE-III surveys Mem. S.A.It. Vol. 77, 265 c SAIt 2006 Memorie della Results of the OGLE-II and OGLE-III surveys I. Soszyński 1,2 1 Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland 2 Universidad

More information

Photometric study and 3D modeling of two asteroids using inversion techniques

Photometric study and 3D modeling of two asteroids using inversion techniques Photometric study and 3D modeling of two asteroids using inversion techniques Raz Parnafes (High school student) Research work done via the Bareket observatory, Israel. Abstract New photometric observations

More information

Photometric Observation and Light Curve Analysis of Binary System ER-Orionis

Photometric Observation and Light Curve Analysis of Binary System ER-Orionis J. Astrophys. Astr. (2010) 31, 97 104 Photometric Observation and Light Curve Analysis of Binary System ER-Orionis M. M. Lame e 1,, B. Javanmardi 2, & N. Riazi 2, 1 Leiden Observatory, Leiden University,

More information

MONITORING THREE LESS-STUDIED SCUTI VARIABLES: GW URSAE MAJORIS, BO LYNCIS, AND AN LYNCIS

MONITORING THREE LESS-STUDIED SCUTI VARIABLES: GW URSAE MAJORIS, BO LYNCIS, AND AN LYNCIS The Astronomical Journal, 130:2876 2883, 2005 December # 2005. The American Astronomical Society. All rights reserved. Printed in U.S.A. MONITORING THREE LESS-STUDIED SCUTI VARIABLES: GW URSAE MAJORIS,

More information

BAV-results of observations. Joachim Hübscher -address: BAV Mitteilungen No November 2014

BAV-results of observations. Joachim Hübscher  -address: BAV Mitteilungen No November 2014 BAV Mitteilungen BAV-results of observations Joachim Hübscher E-Mail-address: publicat@bav-astro.de BAV Mitteilungen No. 236 November 2014 Abstract: This 79th compilation contains especially the results

More information

Measurements of Some VizieR I/330 Objects

Measurements of Some VizieR I/330 Objects Page 589 Wilfried R.A. Knapp Vienna, Austria wilfried.knapp@gmail.com Abstract: Data Mining is a contemporary form of double star detection software running over a star catalog with proper motion data

More information

Fabio Salvaggio Wild Boar Remote Observatory (K49), Saronno, Italy Gruppo Astrofili Catanesi, Catania, Italy

Fabio Salvaggio Wild Boar Remote Observatory (K49), Saronno, Italy Gruppo Astrofili Catanesi, Catania, Italy Papini et al., JAAVSO Volume 45, 2017 1 New Variables Stars Discovered by Data Mining Images Taken during Recent Asteroid Photometric Observations. II. Results from July 2015 through December 2016 Riccardo

More information

Photometric Analysis of the Solar Type, Totally Eclipsing, Southern, Near Critical Contact Binary, CW Sculptoris

Photometric Analysis of the Solar Type, Totally Eclipsing, Southern, Near Critical Contact Binary, CW Sculptoris Samec et al., JAAVSO Volume 45, 2017 1 Photometric Analysis of the Solar Type, Totally Eclipsing, Southern, Near Critical Contact Binary, CW Sculptoris Ronald G. Samec Cody L. Norris Astronomy Group, Department

More information

Period and amplitude changes in the δ Scuti star V 1162 Orionis

Period and amplitude changes in the δ Scuti star V 1162 Orionis Astron. Astrophys. 354, 589 594 (2000) ASTRONOMY AND ASTROPHYSICS Period and amplitude changes in the δ Scuti star V 1162 Orionis T. Arentoft and C. Sterken University of Brussels (VUB), Pleinlaan 2, 1050

More information

Applications and Remote Sensing, Penteli, Athens, Hellas; noa.gr. Astronomy and Mechanics, Zografos, Athens, Hellas; phys.uoa.

Applications and Remote Sensing, Penteli, Athens, Hellas; noa.gr. Astronomy and Mechanics, Zografos, Athens, Hellas; phys.uoa. Binaries with aδscuti component: Results from a long term observational survey, updated catalogue and future prospects arxiv:1506.07409v1 [astro-ph.sr] 24 Jun 2015 Alexios Liakos 1 and Panagiotis Niarchos

More information

Photometry of variable stars with periods near 1 day

Photometry of variable stars with periods near 1 day University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln Norman R Simon Papers Research Papers in Physics and Astronomy 1988 Photometry of variable stars with periods near 1 day

More information

A catalogue of RR Lyrae stars from the Northern Sky Variability Survey

A catalogue of RR Lyrae stars from the Northern Sky Variability Survey Mon. Not. R. Astron. Soc. 368, 1757 1763 (2006) doi:10.1111/j.1365-2966.2006.10236.x A catalogue of RR Lyrae stars from the Northern Sky Variability Survey Patrick Wils, 1 Christopher Lloyd 2 and Klaus

More information

CCD observations of 11 faint asteroids

CCD observations of 11 faint asteroids ASTRONOMY & ASTROPHYSICS JUNE I 1999, PAGE 363 SUPPLEMENT SERIES Astron. Astrophys. Suppl. Ser. 137, 363 368 (1999) CCD observations of 11 faint asteroids K. Sárneczky 1,3,Gy.Szabó 2,3, and L.L. Kiss 2,3

More information

CCD photometry of variable stars in the field of the globular cluster NGC 6397

CCD photometry of variable stars in the field of the globular cluster NGC 6397 ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES Astron. Astrophys. Suppl. Ser. 122, 1-7 (1997) APRIL I 1997, PAGE1 CCD photometry of variable stars in the field of the globular cluster NGC 6397 J. Kaluzny Warsaw

More information

arxiv: v1 [astro-ph.sr] 6 Jul 2013

arxiv: v1 [astro-ph.sr] 6 Jul 2013 On The Period Determination of ASAS Eclipsing Binaries L. Mayangsari a,, R. Priyatikanto a, M. Putra a,b a Prodi Astronomi Institut Teknologi Bandung, Jl. Ganesha no. 10, Bandung, Jawa Barat, Indonesia

More information

The optical gravitational lensing experiment. Variable stars in globular clusters

The optical gravitational lensing experiment. Variable stars in globular clusters ASTRONOMY & ASTROPHYSICS OCTOBER II 1997, PAGE 343 SUPPLEMENT SERIES Astron. Astrophys. Suppl. Ser. 125, 343-353 (1997) The optical gravitational lensing experiment. Variable stars in globular clusters

More information

Cyclic variations in the periods of RR Lyr stars arxiv: v1 [astro-ph.sr] 29 Jan 2018

Cyclic variations in the periods of RR Lyr stars arxiv: v1 [astro-ph.sr] 29 Jan 2018 Cyclic variations in the periods of RR Lyr stars arxiv:1801.09702v1 [astro-ph.sr] 29 Jan 2018 Ennio Poretti 1 2 3, Jean-Francois Le Borgne 4 5 3, Alain Klotz 4 5 3, Monica Rainer 1 6 and Mercedes Correa

More information

TWO NEW EW-TYPE ECLIPSING VARIABLES NEAR AK CNC

TWO NEW EW-TYPE ECLIPSING VARIABLES NEAR AK CNC TWO NEW EW-TYPE ECLIPSING VARIABLES NEAR AK CNC NATALIA A. VIRNINA Department High and Applied Mathematics Odessa National Maritime University, Odessa, Ukraine, virnina@gmail.com Abstract: Two new eclipsing

More information

UX Tri: PERIOD CHANGE DISCOVERED AND UNCHANGED STRONG BLAZHKO EFFECT CONFIRMED

UX Tri: PERIOD CHANGE DISCOVERED AND UNCHANGED STRONG BLAZHKO EFFECT CONFIRMED UX Tri: PERIOD CHANGE DISCOVERED AND UNCHANGED STRONG BLAZHKO EFFECT CONFIRMED Herbert Achterberg 1 and Dieter Husar 2,3 1 present adress: Dr. H. Achterberg, Liegnitzer Strasse 12, D-22850 Norderstedt

More information

arxiv: v2 [astro-ph.sr] 19 Jul 2017

arxiv: v2 [astro-ph.sr] 19 Jul 2017 Astronomy & Astrophysics manuscript no. BlazhkoCatA_A_170719 c ESO 2017 July 20, 2017 The SuperWASP catalogue of 4963 RR Lyr stars: identification of 983 Blazhko effect candidates. P. A. Greer 1, S. G.

More information

The Science Cases for CSTAR, AST3, and KDUST

The Science Cases for CSTAR, AST3, and KDUST The Science Cases for CSTAR, AST3, and KDUST Lifan Wang CCAA & TAMU CSTAR A pathfinder telescope Sky background and transmission - See Zhou Xu s talk Time domain astronomy - Variable stars A wide area

More information

The SuperWASP catalogue of 4963 RR Lyr stars: identification of 983 Blazhko effect candidates.

The SuperWASP catalogue of 4963 RR Lyr stars: identification of 983 Blazhko effect candidates. Astronomy & Astrophysics manuscript no. BlazhkoCatA_A_170705 c ESO 2017 July 5, 2017 The SuperWASP catalogue of 4963 RR Lyr stars: identification of 983 Blazhko effect candidates. P. A. Greer 1, S. G.

More information

NEW VARIABLE STARS IN THE GLOBULAR CLUSTER NGC

NEW VARIABLE STARS IN THE GLOBULAR CLUSTER NGC Journal of the Southeastern Association for Research in Astronomy, 6, 63-71, 2012 July 10 c 2012. Southeastern Association for Research in Astronomy. All rights reserved. NEW VARIABLE STARS IN THE GLOBULAR

More information

Two Transiting Exoplanet Candidates in Cygnus from the MASTER Project

Two Transiting Exoplanet Candidates in Cygnus from the MASTER Project Peremennye Zvezdy (Variable Stars) 33, No. 2, 2013 Received 13 February; accepted 22 February. Two Transiting Exoplanet Candidates in Cygnus from the MASTER Project A. Y. Burdanov 1, A. A. Popov 1, V.

More information

CD Double Star Measures: Jack Jones Memorial Observatory Report #3

CD Double Star Measures: Jack Jones Memorial Observatory Report #3 Page 296 CD Double Star Measures: Jack Jones Memorial Observatory Report #3 James L. Jones 22665 Bents Rd NE Aurora, OR 97002 nt7t@centurytel.net Abstract: This paper submits 114 CCD measurements of 92

More information

Intermediate Report December 2012 Campaign: Photometry and Spectroscopy of P Cyg

Intermediate Report December 2012 Campaign: Photometry and Spectroscopy of P Cyg Intermediate Report December 2012 Campaign: Photometry and Spectroscopy of P Cyg Ernst Pollmann Emil-Nolde-Str. 12, 51375 Leverkusen, Germany; ernst-pollmann@t-online.de Wolfgang Vollmann Dammäckergasse

More information

The Telescopes and Activities on Exoplanet Detection in China. ZHOU Xu National Astronomical Observatories

The Telescopes and Activities on Exoplanet Detection in China. ZHOU Xu National Astronomical Observatories The Telescopes and Activities on Exoplanet Detection in China ZHOU Xu National Astronomical Observatories Cloudage Xinglong Station of National Astronomical Observatories Altitude:~900M; Weather:220 clear

More information

PIRATE The Winnower. Jakub Bochinski Open University

PIRATE The Winnower. Jakub Bochinski Open University PIRATE The Winnower Jakub Bochinski Open University with Richard Busuttil, Carole Haswell, Stefan Holmes, Ulrich Kolb and the rest of the PIRATE team SuperWASP Wide Angle Search for Exoplanets 250 230

More information

Double Star Measurements for December 2013

Double Star Measurements for December 2013 Page 338 Frank Smith 20 Coburn Way Jaffrey, NH 03452 fhasmith@frankandluann.net Abstract: I report 288 measurements of binary systems from 2013.911. The observations were conducted with the T24 robotic

More information

Measuring Radial Velocities of Low Mass Eclipsing Binaries

Measuring Radial Velocities of Low Mass Eclipsing Binaries Measuring Radial Velocities of Low Mass Eclipsing Binaries Rebecca Rattray, Leslie Hebb, Keivan G. Stassun College of Arts and Science, Vanderbilt University Due to the complex nature of the spectra of

More information

CCD photometry of variable stars in the globular cluster NGC 288

CCD photometry of variable stars in the globular cluster NGC 288 ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES Astron. Astrophys. Suppl. Ser. 120, 83-88 (1996) NOVEMBER II 1996, PAGE83 CCD photometry of variable stars in the globular cluster NGC 288 J. Kaluzny Warsaw University

More information

CCD astrometry and instrumental V photometry of visual double stars,

CCD astrometry and instrumental V photometry of visual double stars, ASTRONOMY & ASTROPHYSICS MAY I 1999, PAGE 525 SUPPLEMENT SERIES Astron. Astrophys. Suppl. Ser. 136, 525 529 (1999) CCD astrometry and instrumental V photometry of visual double stars, V. Differential measurements

More information

General Search for Stars with Rapid Optical Variations: Test Fields

General Search for Stars with Rapid Optical Variations: Test Fields Southern Methodist University SMU Scholar Journal of Undergraduate Research Engaged Learning 2009 General Search for Stars with Rapid Optical Variations: Test Fields Elizabeth Fagg Southern Methodist University

More information

General Search for Stars with Rapid Optical Variations: Test Fields

General Search for Stars with Rapid Optical Variations: Test Fields General Search for Stars with Rapid Optical Variations: Test Fields E. Fagg, J. Park, K. Pearson and R. Kehoe Southern Methodist University Dallas, TX 75275 Abstract: We present a search for stars exhibiting

More information

Non-radial pulsations in RR Lyrae stars from the OGLE photometry

Non-radial pulsations in RR Lyrae stars from the OGLE photometry Non-radial pulsations in RR Lyrae stars from the OGLE photometry Henryka Netzel CATS, 2015 with Nicolaus Copernicus Astronomical Center Rados law Smolec Pawe l Moskalik Wojciech Dziembowski 1 / 39 RR Lyrae

More information

COMMISSIONS 27 AND 42 OF THE IAU INFORMATION BULLETIN ON VARIABLE STARS Number 6109

COMMISSIONS 27 AND 42 OF THE IAU INFORMATION BULLETIN ON VARIABLE STARS Number 6109 COMMISSIONS 27 AND 42 OF THE IAU INFORMATION BULLETIN ON VARIABLE STARS Number 6109 Konkoly Observatory Budapest 5 June 2014 HU ISSN 0374 0676 LONG-TERM MONITORING OF Hα EMISSION STRENGTH AND PHOTOMETRIC

More information

One of a kind: A radio pulsing white dwarf binary star

One of a kind: A radio pulsing white dwarf binary star One of a kind: A radio pulsing white dwarf binary star Dr. F.-J. (Josch) Hambsch VVS, BAV, AAVSO, GEOS Introduction White dwarfs are compact stars, similar in size to Earth but 200000 times more massive

More information

ON THE SHORT-TERM ORBITAL PERIOD MODULATION OF Y LEONIS

ON THE SHORT-TERM ORBITAL PERIOD MODULATION OF Y LEONIS ON THE SHORT-TERM ORBITAL PERIOD MODULATION OF Y LEONIS ALEXANDRU POP 1, VLAD TURCU 1, ALEXANDRU MARCU 2 1 Astronomical Institute of the Romanian Academy Astronomical Observatory Cluj-Napoca Str. Cireşilor

More information

Photometric and spectroscopic observations of the 2014 eclipse of the complex binary EE Cephei

Photometric and spectroscopic observations of the 2014 eclipse of the complex binary EE Cephei Photometric and spectroscopic observations of the 2014 eclipse of the complex binary EE Cephei David Boyd Variable Star Section, British Astronomical Association, [davidboyd@orion.me.uk] Abstract We report

More information

COMMISSIONS 27 AND 42 OF THE IAU INFORMATION BULLETIN ON VARIABLE STARS Number 6xxx

COMMISSIONS 27 AND 42 OF THE IAU INFORMATION BULLETIN ON VARIABLE STARS Number 6xxx COMMISSIONS 27 AND 42 OF THE IAU INFORMATION BULLETIN ON VARIABLE STARS Number 6xxx Konkoly Observatory Budapest 2 December 2016 HU ISSN 0374 0676 CORRELATION OF Hα EMISSION FLUX WITH B & V MAGNITUDES

More information

Measurements of Wide Tycho Double Stars in Orion

Measurements of Wide Tycho Double Stars in Orion Page 541 Wilfried R.A. Knapp Vienna, Austria wilfried.knapp@gmail.com Mark McPhee Austin, Texas dr.mark.mcphee@gmail.com Abstract: About 25 TDS objects in Orion with separation of 1.5" or larger remained

More information

THE ABSOLUTE DIMENSIONS OF THE OVERCONTACT BINARY FI BOOTIS

THE ABSOLUTE DIMENSIONS OF THE OVERCONTACT BINARY FI BOOTIS The Astronomical Journal, 132:1153Y1157, 2006 September # 2006. The American Astronomical Society. All rights reserved. Printed in U.S.A. A THE ABSOLUTE DIMENSIONS OF THE OVERCONTACT BINARY FI BOOTIS Dirk

More information

arxiv: v2 [astro-ph] 4 Nov 2008

arxiv: v2 [astro-ph] 4 Nov 2008 Comm. in Asteroseismology Vol. number, publication date (will be inserted in the production process) On the nature of HD 207331: a new δ Scuti variable arxiv:0810.0476v2 [astro-ph] 4 Nov 2008 L.Fox Machado

More information

The Future of Visual Observations in Variable Star Research

The Future of Visual Observations in Variable Star Research Simonsen, JAAVSO Volume 33, 2004 65 The Future of Visual Observations in Variable Star Research Michael A. Simonsen C. E. Scovil Observatory, 2615 S. Summers Rd., Imlay City, Michigan 48444 Presented at

More information

1 Introduction. 2 Observations. HD , an Eccentric Ellipsoidal System

1 Introduction. 2 Observations. HD , an Eccentric Ellipsoidal System Peremennye Zvezdy (Variable Stars) 33, No. 7, 2013 Received 24 August; accepted 30 August. HD 305629, an Eccentric Ellipsoidal System S. A. Otero 1,2, G. Di Scala 3,4 1 Buenos Aires, Argentina 2 American

More information

Catalog Information and Recommendations

Catalog Information and Recommendations Catalog Information and Recommendations U.S. Naval Observatory, December, 2000 P.O.C. Sean Urban (seu@pyxis.usno.navy.mil) 1 Introduction The following is a list of widely used or well known catalogs for

More information

Possible Misclassified Eclipsing Binary Stars Within the Detached Eclipsing Binary Light Curve Fitter (DEBiL) Data Set

Possible Misclassified Eclipsing Binary Stars Within the Detached Eclipsing Binary Light Curve Fitter (DEBiL) Data Set Nicholson, JAAVSO Volume 38, 2010 113 Possible Misclassified Eclipsing Binary Stars Within the Detached Eclipsing Binary Light Curve Fitter (DEBiL) Data Set Martin Nicholson 3 Grovelands, Daventry, Northamptonshire

More information

Speckle Interferometric Observation of WDS

Speckle Interferometric Observation of WDS Page 172 Stephen White 1, Paige Benson 1, Sepehr Ardebilianfard 1, Gezal Bahmani 1, Alexander Beltzer Sweeney 1, Irena Stojimirovic 1, Richard Harshaw 2, Grady Boyce 3, Pat Boyce 3 1. San Diego Mesa College

More information

CCD photometry of δ Scuti stars 7 Aql and 8 Aql

CCD photometry of δ Scuti stars 7 Aql and 8 Aql Comm. in Asteroseismology Vol. 153, 2008 CCD photometry of δ Scuti stars 7 Aql and 8 Aql Abstract L. Fox Machado 1, R. Michel 1, M. Álvarez1, L. Parrao 2, A. Castro 1, and J. H. Peña 2 1 Observatorio Astronómico

More information

On the double-mode RR Lyrae variables of the Sculptor dwarf galaxy

On the double-mode RR Lyrae variables of the Sculptor dwarf galaxy A&A 375, 469 475 (2001) DOI: 10.1051/0004-6361:20010880 c ESO 2001 Astronomy & Astrophysics On the double-mode RR Lyrae variables of the Sculptor dwarf galaxy G. Kovács Konkoly Observatory, PO Box 67,

More information