Long Baselines I. Olaf Wucknitz.
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1 Long Baselines I Olaf Wucknitz wucknitz@astro.uni-bonn.de GLOW Annual Meeting, Bielefeld, June 2012
2 Long Baselines I status one year ago current array Crab nebula/pulsar 3C123 Jupiter O. Wucknitz
3 One year ago (Bremen, July 2011) stations: Effelsberg, Unterweilenbach, Tautenburg, Nancay, Chilbolton data link: only three at a time long-baseline images of a few sources (LBA and HBA) including images of the Crab n.+p. calibrated with long baselines low polarisation of pulsar 0.9% spying on airplanes localisation of lightning first correlated observations of Jupiter (low time res.) O. Wucknitz
4 Progress since then additional stations: Potsdam, Jülich, Onsala network upgrade: can use all eight stations! first observation with 8 stations: October 2011 long tracks of 3C123 (HBA and LBA) long track of 3C196 (LBA) short track of Crab/TauA (HBA), DE604 bad clock offset in Effelsberg (1µsec) corrected consolidation phase: convert ad hoc development code into user tools, later pipeline identified and partly solved many technical problems O. Wucknitz
5 International LOFAR stations O. Wucknitz
6 Image of the Crab pulsar (HBA 2011) PLot file version 1 created 26-JUN :14:37 BOTH: IPOL MHZ ICL DECLINATION (J2000) RIGHT ASCENSION (J2000) Grey scale flux range= JY/BEAM Cont peak flux = E+00 JY/BEAM Levs = 8.566E-03 * (-2, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024) 0 O. Wucknitz
7 Crab nebula with LOFAR (HBA) O. Wucknitz
8 Crab with VLA at 5 GHz (smoothed) O. Wucknitz
9 Direct comparison (smoothed) LOFAR (red) and 5 GHz VLA (green) O. Wucknitz
10 First LBA image of the Crab O. Wucknitz
11 POSSM plots: IQUV (set I to 10 Jy) calibrated RR and LL, averaged over 30min Plot file version 6 created 04-MAR :49: MULTI.1 Freq = GHz, Bw = MH Calibrated with CL # 3 and BP # 1 (BP mode 1) FR60 - RS IF 1(I) IF 1(U) IF 2(I) FREQ MHz IF 2(U) I U IF 3(I) FR60 - RS FREQ MHz IF 3(U) FR60 - RS IF 1(Q) IF 1(V) IF 2(Q) FREQ MHz IF 2(V) FREQ MHz Lower frame: Real Jy Top frame: Imag Jy Vector averaged cross-power spectrum Baseline: FR606HBA(04) - RS306HBA(08) Timerange: 00/20:30:17 to 00/21:00:17 FR606 RS306 Q V IF 3(Q) FR60 - RS IF 3(V) imag real imag real O. Wucknitz
12 Faraday dispersion function from Q and U (30 subbands) O. Wucknitz
13 After subtraction of leakage peak (one CLEAN iteration) O. Wucknitz
14 The same now (Feb 2012) Plot file version 1 created 18-MAY :46: MULTI.1 Freq = GHz, Bw = MH Calibrated with CL # 3 but no bandpass applied DE60 - DE DE60 - DE IF 1(I) IF 2(I) IF 3(I) IF 4(I) IF 1(Q) IF 2(Q) IF 3(Q) IF 4(Q) DE60 - DE DE60 - DE IF 1(U) IF 2(U) IF 3(U) IF 4(U) IF 1(V) IF 2(V) IF 3(V) IF 4(V) FREQ MHz FREQ MHz FREQ MHz FREQ MHz FREQ MHz Lower frame: Real Jy Top frame: Imag Jy Vector averaged cross-power spectrum Baseline: DE602HBA(32) - DE605HBA(35) Timerange: 00/19:20:06 to 00/19:25: FREQ MHz FREQ MHz FREQ MHz No RM synthesis yet. O. Wucknitz
15 3C123 (HBA) NL only [ Olaf Wucknitz ] international [ Adam Deller ] O. Wucknitz
16 3C123 at 150 MHz with MERLIN [ PhD thesis P. Stephens, Manchester 1987, artwork by Neal Jackson ] O. Wucknitz
17 Jupiter: sources of decametric emission Io aurora [ Zarka (2004) ] O. Wucknitz
18 Jupiter observations 8th July 2011: DE604-DE602 RR O. Wucknitz
19 Jupiter observations 8th July 2011: DE604-DE602 LL O. Wucknitz
20 First full-resolution Jupiter observations L35624, 24/25 November :30 01:45 UTC 61 subbands MHz, 256 channels/sb (763 Hz) correlations 6 stations: DE602, FR606, RS106, RS307, SE607, UK608 1 sec integration time fly s eye raw voltages with endless problems! integration time 1.3 msec only 3 stations: DE602, FR606, RS106 nice bursts O. Wucknitz
21 Entire observation DE602-FR606, RR amplitudes O. Wucknitz
22 Entire observation DE602-FR606, LL amplitudes O. Wucknitz
23 Zooming in (1) DE602-FR606, RR amplitudes O. Wucknitz
24 Zooming in (2) DE602-FR606, RR amplitudes O. Wucknitz
25 Zooming in (3) DE602-FR606, RR amplitudes O. Wucknitz
26 Zooming in (4) DE602-FR606, RR amplitudes O. Wucknitz
27 Zooming in (5) DE602-FR606, RR amplitudes O. Wucknitz
28 Elsewhere: Zooming in (1) DE602-FR606, RR amp O. Wucknitz
29 Elsewhere: Zooming in (2) DE602-FR606, RR amp O. Wucknitz
30 Elsewhere: Zooming in (3) DE602-FR606, RR amp O. Wucknitz
31 Elsewhere: Zooming in (3) DE602-FR606, RR phase O. Wucknitz
32 Bispectrum / closure phase DE602-FR606-RS106 RR O. Wucknitz
33 RFI (ASTRON/JIVE daily image 2 Dec 2011) O. Wucknitz
34 Aliens? Arecibo message from Wikipedia giant pulses from Charlotte Sobey O. Wucknitz
35 Crop circles near Chilbolton [ google image search for Chilbolton ] O. Wucknitz
36 ... and Unterweilenbach [ ] O. Wucknitz
37 Summary significant progress (and frustration) in the last year eight stations available, sometimes even all of them man-power limited development lead by LBG active workers: Tobia Carozzi (Onsala), Adam Deller (ASTRON), Anna Kapinska (Portsmouth), Ian Stewart (Bonn), Olaf Wucknitz (Bonn) Crab: LBA image, polarisation going up again! 3C123 images (difficult!) Jupiter, high resolution in space and time standard tools plus AIPS (see second talk), tested in busy week O. Wucknitz
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