Introduction to the Sloan Survey

Size: px
Start display at page:

Download "Introduction to the Sloan Survey"

Transcription

1 Introduction to the Sloan Survey Title Rita Sinha IUCAA

2 SDSS The SDSS uses a dedicated, 2.5-meter telescope on Apache Point, NM, equipped with two powerful special-purpose instruments. The 120-megapixel camera can image 1.5 square degrees of sky at a time, about eight times the area of the full moon. A pair of spectrographs fed by optical fibers can measure spectra of more than 600 galaxies and quasars in a single observation. A custom-designed set of software pipelines keeps pace with the enormous data flow from the telescope. The Sloan Digital Sky Survey (SDSS) will map one-quarter of the entire sky and perform redshift survey of galaxies, quasars and stars. Now into its sixth major data release i.e. DR6. Science goals: fundamental questions about the nature of the Universe, the origin of galaxies and quasars, and the formation and evolution of our own Galaxy, the Milky Way.

3 DATA FLOW Title

4 Interesting images from Sloan Within the heart of the majestic Seyfert galaxy, NGC 5033, lies a powerful engine. Seyfert galaxies are a class of active galactic nuclei (AGN) which produce large amounts of emission line spectra in their core, often with variable power. The driving source of this emission is thought to be a supermassive black hole at the centre. Spiral galaxies NGC 3788 (top) and NGC 3786 (bottom) in the constellation Ursa Major. These two galaxies, like many found throughout the SDSS survey, are gravitationally interacting. Interactions such as these are commonly observed by the SDSS. They are thought to lead to the formation of elliptical galaxies. The Siamese twins, NGC 4567 and NGC 4568, look like they are in the middle of a collision. But yet these two members of the Virgo Cluster show none of the usual signs of interaction such as tidal tails or distortion. It may be that one is just passing in front of the other.

5 Future sky coverage of SDSS SDSS- II Imaging and spectroscopy of the North Galactic Cap is continuing as part of the Sloan Legacy Survey, one of three components of SDSS-II. The Legacy Survey, which will continue through mid-2008, will cover the small remaining imaging gaps from DR5 and will complete spectroscopy over the full DR5 region. The SEGUE (Sloan Extension for Galactic Understanding and Exploration ) component of SDSS-II includes additional imaging, and spectroscopy of stellar targets. The Sloan Supernova Survey, the third component of SDSS-II, carries out repeated imaging of the southern equatorial stripe to discover and measure supernovae. The first data from SDSS-II release is DR6.

6 Data Release 6 (DR6) Imaging Footprint area: 9583 sq. deg. Imaging catalog 287 million unique objects [ Data volume of images: 10 TB ; catalogs (DAS, fits format) 2 TB ; catalogs (CAS, SQL database) 4 TB ] Average wavelengths and magnitude limits u g r i z 3551Å 4686Å 6165Å 7481Å 8931Å SDSS DR6 Imaging Sky Coverage (Aitoff projection of Equatorial coordinates)

7 Data Release 6 (DR6) Imaging Footprint area: 9583 sq. deg. Imaging catalog 287 million unique objects [ Data volume of images: 10 TB ; catalogs (DAS, fits format) 2 TB ; catalogs (CAS, SQL database) 4 TB ] Average wavelengths and magnitude limits u g r i z 3551Å 4686Å 6165Å 7481Å 8931Å SDSS DR6 Imaging Sky Coverage (Aitoff projection of Equatorial coordinates) Spectroscopy Area 7425 sq. deg. Wavelength coverage Å Target magnitude limits for main samples: Galaxies: Petrosian r <17.77, Quasars: PSF i <19.1 [Data volume: 310 GB] Catalog of 1,271,680 spectra 790,860 Galaxies, 154,925 Stars 90,108 Quasars (redshift <2.3) 13,539 Quasars (redshift >=2.3) 69,052 M stars and later 68,770 Sky spectra, 21,332 Unknown class SDSS DR6 Spectral Sky Coverage (Aitoff projection of Equatorial coordinates)

8 SDSS data products Images - using SDSS as your telescope SDSS provides FITS image files of the corrected frames in five bands, a mask that records how each pixel was used in the imaging pipelines, images of the corrected frames after detected objects have been removed, and "atlas" images, which include all significant pixels around each object. Object lists - using SDSS as your photometric catalog The calibrated object lists are FITS tables containing positions, fluxes, and shapes of all objects detected at >5 sigma on the images. Spectra and spectroscopic parameters - using SDSS as your spectrograph "2d" spectra: FITS files of the flux- and wavelength-calibrated, sky-subtracted spectra, with error and mask arrays and resolution at each pixel. "1d" spectra: FITS files with the calibrated spectra and error and mask arrays, redshift, spectral classification, and detected lines of each spectrum. Tiling - using SDSS as your complete survey "Tiling" means optimising the placement of spectroscopic tiles on the sky and assignment of spectroscopic fibers to targets in the spectroscopic survey. Other data products These include astrometric calibrations, photometric calibrations, gif and postscript plots of spectra, and finding charts in postscript/jpeg/fits formats.

9 SDSS data products Data Access All data products are available from the data access page as fits images and tables from the Data Archive Server (DAS). All catalogs are also available through the Catalog Archive Server (CAS) which provides fast search capabilities. Data model The flat-file data model contains detailed descriptions of all data generated by the data processing. The Archive Intro page and the Schema Browser describe how data are stored in the Catalog Archive Server (CAS).

10 DR5 Schema

11 DEMO Title

12 Schema Browser

13 Visual Tools * Finding Chart returns a JPEG image centered on (ra,dec), of size (height x width) where the image is scaled to an arbitrary scale (scale). Various drawing options can be specified (opt). * Navigate lets you interactively navigate the sky, by clicking and zooming. * Image Lists is a cutout service that generates small JPEG images for up to 1000 user-provided positions on the sky. * Explore lets you interactively explore the various properties of individual objects.

14 Search You can search the SDSS database by using several predefined queries to find specific objects. * Radial: Search the sky around a given point * Rectangular: Search the sky in a rectangular region * SQL: Type in a SQL query directly * Imaging Query : Form-based query on imaging data * Spectro Query : Form-based query on spectroscopic data

15 Search... For the query pages we require: * ra, dec (in either degrees or in the h:m:s, d:m:s notation). * radius is the search radius for a radial query (arcminutes). * u,g,r,i,z - the magnitudes of the objects in the SDSS. The output options and formats on the query pages: * Return: the number of objects Selecting all will return all objects Selecting top N will return the first N objects satisfying the query * Format: output format It can be HTML, CSV, or can be XML(not yet implemented)

16 SQL SQL: Structured Query Language, a standard means of asking for data from databases Syntax: Select... From... Where... Sample Query: SELECT ObjID, ra,dec,psfmag_i, psfmag_r, psfmag_u, psfmag_g,psfmag_z, z FROM SpecPhoto WHERE psfmag_u between 10 and 24 AND (specclass = 1 and type = 6)

17 Data Access Create account in Casjobs DAS The Data Archive Server, which provides access to the imaging and spectroscopic products of the survey. CAS The Catalog Archive Server contains the measured parameters from all objects in the imaging survey and the spectroscopic survey.

Introduction to SDSS -instruments, survey strategy, etc

Introduction to SDSS -instruments, survey strategy, etc Introduction to SDSS -instruments, survey strategy, etc (materials from http://www.sdss.org/) Shan Huang 17 February 2010 Survey type Status Imaging and Spectroscopy Basic Facts SDSS-II completed, SDSS-III

More information

Data Release 5. Sky coverage of imaging data in the DR5

Data Release 5. Sky coverage of imaging data in the DR5 Data Release 5 The Sloan Digital Sky Survey has released its fifth Data Release (DR5). The spatial coverage of DR5 is about 20% larger than that of DR4. The photometric data in DR5 are based on five band

More information

The SDSS Data. Processing the Data

The SDSS Data. Processing the Data The SDSS Data Processing the Data On a clear, dark night, light that has traveled through space for a billion years touches a mountaintop in southern New Mexico and enters the sophisticated instrumentation

More information

Studying galaxies with the Sloan Digital Sky Survey

Studying galaxies with the Sloan Digital Sky Survey Studying galaxies with the Sloan Digital Sky Survey Laboratory exercise, Physics of Galaxies, Spring 2017 (Uppsala Universitet) by Beatriz Villarroel *** The Sloan Digital Sky Survey (SDSS) is the largest

More information

ROSAT Roentgen Satellite. Chandra X-ray Observatory

ROSAT Roentgen Satellite. Chandra X-ray Observatory ROSAT Roentgen Satellite Joint facility: US, Germany, UK Operated 1990 1999 All-sky survey + pointed observations Chandra X-ray Observatory US Mission Operating 1999 present Pointed observations How do

More information

SDSS Data Management and Photometric Quality Assessment

SDSS Data Management and Photometric Quality Assessment SDSS Data Management and Photometric Quality Assessment Željko Ivezić Princeton University / University of Washington (and SDSS Collaboration) Thinkshop Robotic Astronomy, Potsdam, July 12-15, 2004 1 Outline

More information

A SPEctra Clustering Tool for the exploration of large spectroscopic surveys. Philipp Schalldach (HU Berlin & TLS Tautenburg, Germany)

A SPEctra Clustering Tool for the exploration of large spectroscopic surveys. Philipp Schalldach (HU Berlin & TLS Tautenburg, Germany) A SPEctra Clustering Tool for the exploration of large spectroscopic surveys Philipp Schalldach (HU Berlin & TLS Tautenburg, Germany) Working Group Helmut Meusinger (Tautenburg, Germany) Philipp Schalldach

More information

Searching for Needles in the Sloan Digital Haystack

Searching for Needles in the Sloan Digital Haystack Searching for Needles in the Sloan Digital Haystack Robert Lupton Željko Ivezić Jim Gunn Jill Knapp Michael Strauss University of Chicago, Fermilab, Institute for Advanced Study, Japanese Participation

More information

JINA Observations, Now and in the Near Future

JINA Observations, Now and in the Near Future JINA Observations, Now and in the Near Future Timothy C. Beers Department of Physics & Astronomy Michigan State University & JINA: Joint Institute for Nuclear Astrophysics Examples SDSS-I, II, and III

More information

Design and implementation of the spectra reduction and analysis software for LAMOST telescope

Design and implementation of the spectra reduction and analysis software for LAMOST telescope Design and implementation of the spectra reduction and analysis software for LAMOST telescope A-Li Luo *a, Yan-Xia Zhang a and Yong-Heng Zhao a *a National Astronomical Observatories, Chinese Academy of

More information

Large Scale Structure of the Universe Lab

Large Scale Structure of the Universe Lab Large Scale Structure of the Universe Lab Introduction: Since the mid-1980 s astronomers have gathered data allowing, for the first time, a view of the structure of the Universe in three-dimensions. You

More information

Astronomical image reduction using the Tractor

Astronomical image reduction using the Tractor the Tractor DECaLS Fin Astronomical image reduction using the Tractor Dustin Lang McWilliams Postdoc Fellow Carnegie Mellon University visiting University of Waterloo UW / 2015-03-31 1 Astronomical image

More information

The Dark Energy Survey Public Data Release 1

The Dark Energy Survey Public Data Release 1 The Dark Energy Survey Public Data Release 1 Matias Carrasco Kind (NCSA/UIUC) and the DR1 Release Team https://des.ncsa.illinois.edu/ Near-Field Cosmology with DES DR1 and Beyond Workshop, June 27-29th,

More information

D4.2. First release of on-line science-oriented tutorials

D4.2. First release of on-line science-oriented tutorials EuroVO-AIDA Euro-VO Astronomical Infrastructure for Data Access D4.2 First release of on-line science-oriented tutorials Final version Grant agreement no: 212104 Combination of Collaborative Projects &

More information

SDSS-IV and eboss Science. Hyunmi Song (KIAS)

SDSS-IV and eboss Science. Hyunmi Song (KIAS) SDSS-IV and eboss Science Hyunmi Song (KIAS) 3rd Korea-Japan Workshop on Dark Energy April 4, 2016 at KASI Sloan Digital Sky Survey 2.5m telescopes at Apache Point Observatory (US) and Las Campanas Observatory

More information

Quasars in the SDSS. Rich Kron NGC June 2006 START CI-Team: Variable Quasars Research Workshop Yerkes Observatory

Quasars in the SDSS. Rich Kron NGC June 2006 START CI-Team: Variable Quasars Research Workshop Yerkes Observatory Quasars in the SDSS Rich Kron 28 June 2006 START CI-Team: Variable Quasars Research Workshop Yerkes Observatory NGC 1068 About 10% of all of the spectra in the SDSS database are of quasars (as opposed

More information

Multi-wavelength Surveys for AGN & AGN Variability. Vicki Sarajedini University of Florida

Multi-wavelength Surveys for AGN & AGN Variability. Vicki Sarajedini University of Florida Multi-wavelength Surveys for AGN & AGN Variability Vicki Sarajedini University of Florida What are Active Galactic Nuclei (AGN)? Galaxies with a source of non-stellar emission arising in the nucleus (excessive

More information

The Sloan Digital Sky Survey

The Sloan Digital Sky Survey The Sloan Digital Sky Survey Robert Lupton Xiaohui Fan Jim Gunn Željko Ivezić Jill Knapp Michael Strauss University of Chicago, Fermilab, Institute for Advanced Study, Japanese Participation Group, Johns

More information

RLW paper titles:

RLW paper titles: RLW paper titles: http://www.wordle.net Astronomical Surveys and Data Archives Richard L. White Space Telescope Science Institute HiPACC Summer School, July 2012 Overview Surveys & catalogs: Fundamental

More information

CONFIRMATION OF A SUPERNOVA IN THE GALAXY NGC6946

CONFIRMATION OF A SUPERNOVA IN THE GALAXY NGC6946 CONFIRMATION OF A SUPERNOVA IN THE GALAXY NGC6946 G. Iafrate and M. Ramella INAF - Astronomical Observatory of Trieste 1 Introduction Suddenly a star runs out its nuclear fuel. Its life as a normal star

More information

Data Management Plan Extended Baryon Oscillation Spectroscopic Survey

Data Management Plan Extended Baryon Oscillation Spectroscopic Survey Data Management Plan Extended Baryon Oscillation Spectroscopic Survey Experiment description: eboss is the cosmological component of the fourth generation of the Sloan Digital Sky Survey (SDSS-IV) located

More information

Real Astronomy from Virtual Observatories

Real Astronomy from Virtual Observatories THE US NATIONAL VIRTUAL OBSERVATORY Real Astronomy from Virtual Observatories Robert Hanisch Space Telescope Science Institute US National Virtual Observatory About this presentation What is a Virtual

More information

PDF hosted at the Radboud Repository of the Radboud University Nijmegen

PDF hosted at the Radboud Repository of the Radboud University Nijmegen PDF hosted at the Radboud Repository of the Radboud University Nijmegen The following full text is a publisher's version. For additional information about this publication click this link. http://hdl.handle.net/2066/84153

More information

Reduced data products in the ESO Phase 3 archive (Status: 02 August 2017)

Reduced data products in the ESO Phase 3 archive (Status: 02 August 2017) Reduced data products in the ESO Phase 3 archive (Status: 02 August 2017) The ESO Phase 3 archive provides access to reduced and calibrated data products. All these data are stored in standard formats

More information

The Sloan Digital Sky Survey. Sebastian Jester Experimental Astrophysics Group Fermilab

The Sloan Digital Sky Survey. Sebastian Jester Experimental Astrophysics Group Fermilab The Sloan Digital Sky Survey Sebastian Jester Experimental Astrophysics Group Fermilab SLOAN DIGITAL SKY SURVEY Sloan Digital Sky Survey Goals: 1. Image ¼ of sky in 5 bands 2. Measure parameters of objects

More information

Lecture Outlines. Chapter 25. Astronomy Today 7th Edition Chaisson/McMillan Pearson Education, Inc.

Lecture Outlines. Chapter 25. Astronomy Today 7th Edition Chaisson/McMillan Pearson Education, Inc. Lecture Outlines Chapter 25 Astronomy Today 7th Edition Chaisson/McMillan Chapter 25 Galaxies and Dark Matter Units of Chapter 25 25.1 Dark Matter in the Universe 25.2 Galaxy Collisions 25.3 Galaxy Formation

More information

Feeding the Beast. Chris Impey (University of Arizona)

Feeding the Beast. Chris Impey (University of Arizona) Feeding the Beast Chris Impey (University of Arizona) Note: the box is growing due to cosmic expansion but this is factored out. Heirarchical Structure Active Galactic Nuclei (AGN) Nuclear activity in

More information

Excerpts from previous presentations. Lauren Nicholson CWRU Departments of Astronomy and Physics

Excerpts from previous presentations. Lauren Nicholson CWRU Departments of Astronomy and Physics Excerpts from previous presentations Lauren Nicholson CWRU Departments of Astronomy and Physics Part 1: Review of Sloan Digital Sky Survey and the Galaxy Zoo Project Part 2: Putting it all together Part

More information

Chapter 19 Galaxies. Hubble Ultra Deep Field: Each dot is a galaxy of stars. More distant, further into the past. halo

Chapter 19 Galaxies. Hubble Ultra Deep Field: Each dot is a galaxy of stars. More distant, further into the past. halo Chapter 19 Galaxies Hubble Ultra Deep Field: Each dot is a galaxy of stars. More distant, further into the past halo disk bulge Barred Spiral Galaxy: Has a bar of stars across the bulge Spiral Galaxy 1

More information

Modern Image Processing Techniques in Astronomical Sky Surveys

Modern Image Processing Techniques in Astronomical Sky Surveys Modern Image Processing Techniques in Astronomical Sky Surveys Items of the PhD thesis József Varga Astronomy MSc Eötvös Loránd University, Faculty of Science PhD School of Physics, Programme of Particle

More information

(Present and) Future Surveys for Metal-Poor Stars

(Present and) Future Surveys for Metal-Poor Stars (Present and) Future Surveys for Metal-Poor Stars Timothy C. Beers Department of Physics & Astronomy Michigan State University & JINA: Joint Institute for Nuclear Astrophysics SDSS 1 Why the Fascination

More information

Flagging Bad Data in Imaging

Flagging Bad Data in Imaging Flagging Bad Data Flagging Bad Data in Imaging Observations are never perfect, due to observing conditions e.g., bad seeing, moonlight, the solar wind, clouds, airplanes, cosmic rays, telescope malfunctions

More information

How Do I Create a Hubble Diagram to show the expanding universe?

How Do I Create a Hubble Diagram to show the expanding universe? How Do I Create a Hubble Diagram to show the expanding universe? An extremely important topic in astronomy is the expansion of the universe. Although the expanding universe is nearly always discussed in

More information

Quasars: Back to the Infant Universe

Quasars: Back to the Infant Universe Quasars: Back to the Infant Universe Learning Objectives! What is a quasar? What spectral features tell us quasars are very redshifted (very distant)? What spectral features tell us they are composed of

More information

Characterizing the Gigahertz radio sky

Characterizing the Gigahertz radio sky THE US NATIONAL VIRTUAL OBSERVATORY Mining multi-wavelength data in large area surveys with VO tools Yogesh Wadadekar STScI This work is partly supported by a NVO Research Initiative award. Collaborator:

More information

Galaxy Growth and Classification

Galaxy Growth and Classification Observational Astronomy Lab: I-1FS Objectives: First Name: Last Name: Galaxy Growth and Classification To understand the concept of color in astronomy. To be able to classify galaxies based on their morphology

More information

Galaxies. Galaxy Diversity. Galaxies, AGN and Quasars. Physics 113 Goderya

Galaxies. Galaxy Diversity. Galaxies, AGN and Quasars. Physics 113 Goderya Galaxies, AGN and Quasars Physics 113 Goderya Chapter(s): 16 and 17 Learning Outcomes: Galaxies Star systems like our Milky Way Contain a few thousand to tens of billions of stars. Large variety of shapes

More information

Quasars and Active Galactic Nuclei (AGN)

Quasars and Active Galactic Nuclei (AGN) Quasars and Active Galactic Nuclei (AGN) Astronomy Summer School in Mongolia National University of Mongolia, Ulaanbaatar July 21-26, 2008 Kaz Sekiguchi Hubble Classification M94-Sa M81-Sb M101-Sc M87-E0

More information

Lecture 9. Quasars, Active Galaxies and AGN

Lecture 9. Quasars, Active Galaxies and AGN Lecture 9 Quasars, Active Galaxies and AGN Quasars look like stars but have huge redshifts. object with a spectrum much like a dim star highly red-shifted enormous recessional velocity huge distance (Hubble

More information

The Cornell Atlas of Spitzer Spectra (CASSIS) and recent advances in the extraction of complex sources

The Cornell Atlas of Spitzer Spectra (CASSIS) and recent advances in the extraction of complex sources The Cornell Atlas of Spitzer Spectra (CASSIS) and recent advances in the extraction of complex sources V. Lebouteiller (CEA & Cornell University) D.J. Barry, G.C. Sloan, H.W.W. Spoon, D.W. Weedman, J.R.

More information

Part two of a year-long introduction to astrophysics:

Part two of a year-long introduction to astrophysics: ASTR 3830 Astrophysics 2 - Galactic and Extragalactic Phil Armitage office: JILA tower A909 email: pja@jilau1.colorado.edu Spitzer Space telescope image of M81 Part two of a year-long introduction to astrophysics:

More information

Active Galactic Nuclei OIII

Active Galactic Nuclei OIII Active Galactic Nuclei In 1908, Edward Fath (1880-1959) observed NGC 1068 with his spectroscope, which displayed odd (and very strong) emission lines. In 1926 Hubble recorded emission lines of this and

More information

11 days exposure time. 10,000 galaxies. 3 arcminutes size (0.1 x diameter of moon) Estimated number of galaxies in observable universe: ~200 billion

11 days exposure time. 10,000 galaxies. 3 arcminutes size (0.1 x diameter of moon) Estimated number of galaxies in observable universe: ~200 billion 11 days exposure time 10,000 galaxies 3 arcminutes size (0.1 x diameter of moon) Estimated number of galaxies in observable universe: ~200 billion Galaxies with disks Clumpy spiral shapes Smooth elliptical

More information

EUCLID Spectroscopy. Andrea Cimatti. & the EUCLID-NIS Team. University of Bologna Department of Astronomy

EUCLID Spectroscopy. Andrea Cimatti. & the EUCLID-NIS Team. University of Bologna Department of Astronomy EUCLID Spectroscopy Andrea Cimatti University of Bologna Department of Astronomy & the EUCLID-NIS Team Observing the Dark Universe with EUCLID, ESA ESTEC, 17 November 2009 DARK Universe (73% Dark Energy

More information

Quasars and AGN. What are quasars and how do they differ from galaxies? What powers AGN s. Jets and outflows from QSOs and AGNs

Quasars and AGN. What are quasars and how do they differ from galaxies? What powers AGN s. Jets and outflows from QSOs and AGNs Goals: Quasars and AGN What are quasars and how do they differ from galaxies? What powers AGN s. Jets and outflows from QSOs and AGNs Discovery of Quasars Radio Observations of the Sky Reber (an amateur

More information

Lecture Outlines. Chapter 24. Astronomy Today 8th Edition Chaisson/McMillan Pearson Education, Inc.

Lecture Outlines. Chapter 24. Astronomy Today 8th Edition Chaisson/McMillan Pearson Education, Inc. Lecture Outlines Chapter 24 Astronomy Today 8th Edition Chaisson/McMillan Chapter 24 Galaxies Units of Chapter 24 24.1 Hubble s Galaxy Classification 24.2 The Distribution of Galaxies in Space 24.3 Hubble

More information

Hubble s Law and the Cosmic Distance Scale

Hubble s Law and the Cosmic Distance Scale Lab 7 Hubble s Law and the Cosmic Distance Scale 7.1 Overview Exercise seven is our first extragalactic exercise, highlighting the immense scale of the Universe. It addresses the challenge of determining

More information

Active Galactic Nuclei

Active Galactic Nuclei Active Galactic Nuclei How were they discovered? How common are they? How do we know they are giant black holes? What are their distinctive properties? Active Galactic Nuclei for most galaxies the luminosity

More information

Chapter 15 2/19/2014. Lecture Outline Hubble s Galaxy Classification. Normal and Active Galaxies Hubble s Galaxy Classification

Chapter 15 2/19/2014. Lecture Outline Hubble s Galaxy Classification. Normal and Active Galaxies Hubble s Galaxy Classification Lecture Outline Chapter 15 Normal and Active Galaxies Spiral galaxies are classified according to the size of their central bulge. Chapter 15 Normal and Active Galaxies Type Sa has the largest central

More information

Introduction The Role of Astronomy p. 3 Astronomical Objects of Research p. 4 The Scale of the Universe p. 7 Spherical Astronomy Spherical

Introduction The Role of Astronomy p. 3 Astronomical Objects of Research p. 4 The Scale of the Universe p. 7 Spherical Astronomy Spherical Introduction The Role of Astronomy p. 3 Astronomical Objects of Research p. 4 The Scale of the Universe p. 7 Spherical Astronomy Spherical Trigonometry p. 9 The Earth p. 12 The Celestial Sphere p. 14 The

More information

VISTA HEMISPHERE SURVEY DATA RELEASE 1

VISTA HEMISPHERE SURVEY DATA RELEASE 1 Release date (will be set by ESO) VISTA HEMISPHERE SURVEY DATA RELEASE 1 PROPOSAL ESO No.: 179.A-2010 PRINCIPAL INVESTIGATOR: Richard McMahon Authors: R. McMahon, M. Banerji, N. Lodieu for the VHS Collaboration

More information

Black Holes and Active Galactic Nuclei

Black Holes and Active Galactic Nuclei Black Holes and Active Galactic Nuclei A black hole is a region of spacetime from which gravity prevents anything, including light, from escaping. The theory of general relativity predicts that a sufficiently

More information

The SDSS, Databases and SQL Just another day in database land

The SDSS, Databases and SQL Just another day in database land The SDSS, Databases and SQL Just another day in database land Overview of the day A more in-depth discussion of how data bases are put together. Searching data - why databases are useful. The Structured

More information

Active Galaxies & Quasars

Active Galaxies & Quasars Active Galaxies & Quasars Normal Galaxy Active Galaxy Galactic Nuclei Bright Active Galaxy NGC 5548 Galaxy Nucleus: Exact center of a galaxy and its immediate surroundings. If a spiral galaxy, it is the

More information

COLOR SEPARATION OF GALAXY TYPES IN THE SLOAN DIGITAL SKY SURVEY IMAGING DATA

COLOR SEPARATION OF GALAXY TYPES IN THE SLOAN DIGITAL SKY SURVEY IMAGING DATA COLOR SEPARATION OF GALAXY TYPES IN THE SLOAN DIGITAL SKY SURVEY IMAGING DATA Strateva et al. 2001, AJ, 122, 1861 Presenter: Ken Mawatari Date: 2011 October 31 2011/10/31 1 Outline Abstruct : roughly Introduction

More information

Cosmic Distance Determinations

Cosmic Distance Determinations Cosmic Distance Determinations Radar (works for inner solar system) Parallax D(pc) = 1 p(arcsec) GAIA satellite (2013) 20 micro-arcsec resolution! Thus D < 10 kpc Beyond Parallax: Standard Candles Use

More information

Reduction procedure of long-slit optical spectra. Astrophysical observatory of Asiago

Reduction procedure of long-slit optical spectra. Astrophysical observatory of Asiago Reduction procedure of long-slit optical spectra Astrophysical observatory of Asiago Spectrograph: slit + dispersion grating + detector (CCD) It produces two-dimension data: Spatial direction (x) along

More information

Galaxies and Hubble s Law

Galaxies and Hubble s Law Galaxies and Hubble s Law Some Important History: Charles Messier In the early 19 th century, Charles Messier was hunting for comets, but in the telescopes of the time, identifying comets was difficult

More information

Active Galaxies and Quasars

Active Galaxies and Quasars Active Galaxies and Quasars Radio Astronomy Grote Reber, a radio engineer and ham radio enthusiast, built the first true radio telescope in 1936 in his backyard. By 1944 he had detected strong radio emissions

More information

Reverberation Mapping in the Era of MOS and Time-Domain Surveys: from SDSS to MSE

Reverberation Mapping in the Era of MOS and Time-Domain Surveys: from SDSS to MSE Reverberation Mapping in the Era of MOS and Time-Domain Surveys: from SDSS to MSE Yue Shen Carnegie Obs -> University of Illinois at Urbana-Champaign MSE Science Team Meeting, July 29-31 2015, Big Island

More information

Australia s Optical Data Centre

Australia s Optical Data Centre Australia s Optical Data Centre A Data Central and SkyMapper Collaboration Milky Way over the Pinnacles in Australia - Michael Goh Explore Tools for data retrieval and automatic cross-matching make for

More information

Astronomy C SSSS 2018

Astronomy C SSSS 2018 Astronomy C SSSS 2018 Galaxies and Stellar Evolution Written by Anna1234 School Team # Names 1 Instructions: 1. There are pictures of a number of galaxies in this test. However, as the DSO list for 2019

More information

Chapter 17. Active Galaxies and Supermassive Black Holes

Chapter 17. Active Galaxies and Supermassive Black Holes Chapter 17 Active Galaxies and Supermassive Black Holes Guidepost In the last few chapters, you have explored our own and other galaxies, and you are ready to stretch your scientific imagination and study

More information

Extraction of Point Source Spectra from STIS Long Slit Data

Extraction of Point Source Spectra from STIS Long Slit Data 1997 HST Calibration Workshop Space Telescope Science Institute, 1997 S. Casertano, et al., eds. Extraction of Point Source Spectra from STIS Long Slit Data J. R. Walsh Spect Telescope European Coordinating

More information

Doing astronomy with SDSS from your armchair

Doing astronomy with SDSS from your armchair Doing astronomy with SDSS from your armchair Željko Ivezić, University of Washington & University of Zagreb Partners in Learning webinar, Zagreb, 15. XII 2010 Supported by: Microsoft Croatia and the Croatian

More information

Galaxies with Active Nuclei. Active Galactic Nuclei Seyfert Galaxies Radio Galaxies Quasars Supermassive Black Holes

Galaxies with Active Nuclei. Active Galactic Nuclei Seyfert Galaxies Radio Galaxies Quasars Supermassive Black Holes Galaxies with Active Nuclei Active Galactic Nuclei Seyfert Galaxies Radio Galaxies Quasars Supermassive Black Holes Active Galactic Nuclei About 20 25% of galaxies do not fit well into Hubble categories

More information

The SDSS - data & how to get it Jarle Brinchmann Leiden,

The SDSS - data & how to get it Jarle Brinchmann Leiden, The SDSS - data & how to get it Jarle Brinchmann Leiden, An outline Galaxy bimodality The AGN population Environment - does it matter? The M-Z relation. Large-scale structure stuff The Sloan Digital Sky

More information

Dark Energy and Dark Matter

Dark Energy and Dark Matter Dark Energy and Dark Matter Attendance Quiz Are you here today? (a) yes (b) no Here! (c) The Dark Lord wants his ring back! Final Exam The final exam is Thursday, 6/8, from 11:30am to 1:30pm (2 hours),

More information

Astronomical imagers. ASTR320 Monday February 18, 2019

Astronomical imagers. ASTR320 Monday February 18, 2019 Astronomical imagers ASTR320 Monday February 18, 2019 Astronomical imaging Telescopes gather light and focus onto a focal plane, but don t make perfect images Use a camera to improve quality of images

More information

The Galactic O-Star Spectral Survey (GOSSS) Project status and first results

The Galactic O-Star Spectral Survey (GOSSS) Project status and first results The Galactic O-Star Spectral Survey (GOSSS) Project status and first results Alfredo Sota 1, Jesús Maíz Apellániz 1, Rodolfo H. Barbá 2, Nolan R. Walborn 3, Emilio J. Alfaro 1, Roberto C. Gamen 4, Nidia

More information

PROJECT GLOBULAR CLUSTERS

PROJECT GLOBULAR CLUSTERS PROJECT 5 GLOBULAR CLUSTERS Objective: The objective of this exercise is the calculation of the core and tidal radius of a globular cluster in the Milky Way. Measure the tidal radius of a globular cluster

More information

Quasar Candidate Selection by Clustering using Fibonacci Series for Astronomical Surveys

Quasar Candidate Selection by Clustering using Fibonacci Series for Astronomical Surveys Quasar Candidate Selection by Clustering using Fibonacci Series for Astronomical Surveys Abstract It is becoming apparent that the next generation astronomical analysis requires good domain knowledge to

More information

Radial Velocity Surveys. Matthias Steinmetz (AIP)

Radial Velocity Surveys. Matthias Steinmetz (AIP) Radial Velocity Surveys Matthias Steinmetz (AIP) The Galactic case for RV surveys Information on how galaxies form is locked in n the phase-space (position,velocities) Information is locked in stars (abundances)

More information

BAYESIAN CROSS-IDENTIFICATION IN ASTRONOMY

BAYESIAN CROSS-IDENTIFICATION IN ASTRONOMY BAYESIAN CROSS-IDENTIFICATION IN ASTRONOMY / The Johns Hopkins University Sketch by William Parsons (1845) 2 Recording Observations Whirlpool Galaxy M51 Discovered by Charles Messier (1773) Multicolor

More information

The Classification of Galaxies

The Classification of Galaxies Admin. 11/9/17 1. Class website http://www.astro.ufl.edu/~jt/teaching/ast1002/ 2. Optional Discussion sections: Tue. ~11.30am (period 5), Bryant 3; Thur. ~12.30pm (end of period 5 and period 6), start

More information

SDSS-IV MaStar: a Large, Comprehensive, and High Quality Empirical Stellar Library

SDSS-IV MaStar: a Large, Comprehensive, and High Quality Empirical Stellar Library 3rd International Workshop on Spectral Stellar Libraries ASI Conference Series, 2017, Vol. 14, pp 99 103 Editors: P. Coelho, L. Martins & E. Griffin SDSS-IV MaStar: a Large, Comprehensive, and High Quality

More information

Galaxies. With a touch of cosmology

Galaxies. With a touch of cosmology Galaxies With a touch of cosmology Types of Galaxies Spiral Elliptical Irregular Spiral Galaxies Spiral Galaxies Disk component where the spiral arms are Interstellar medium Star formation Spheroidal

More information

Star systems like our Milky Way. Galaxies

Star systems like our Milky Way. Galaxies Galaxies Star systems like our Milky Way Galaxies Contain a few thousand to tens of billions of stars,as well as varying amounts of gas and dust Large variety of shapes and sizes Gas and Dust in

More information

24.1 Hubble s Galaxy Classification

24.1 Hubble s Galaxy Classification Chapter 24 Galaxies Units of Chapter 24 24.1 Hubble s Galaxy Classification 24.2 The Distribution of Galaxies in Space 24.3 Hubble s Law 24.4 XXActive Galactic Nuclei XXRelativistic Redshifts and Look-Back

More information

The J-PAS Survey. Silvia Bonoli

The J-PAS Survey. Silvia Bonoli The J-PAS Survey The Javalambre-PAU Astrophysical Survey A Spanish-Brazilian collaboration, the J-PAS survey will scan ~8500 deg2 of the northern sky with 54 narrow-band filters covering the whole optical

More information

Introduction to SDSS-IV and DESI

Introduction to SDSS-IV and DESI Introduction to SDSS-IV and DESI Ho Seong HWANG (KIAS) 2015 January 27 The 4th Survey Science Group Workshops SDSS-I: 2000-2005 SDSS-II: 2005-2008 SDSS-III: 2008-2014 SDSS-IV: 2014-2020 SDSS-IV: Project

More information

GOODS/FORS2 Final Data Release: Version 3.0

GOODS/FORS2 Final Data Release: Version 3.0 ESO Phase 3 Data Release Description Data Collection GOODS_FORS2 Release Number 1 Data Provider C. Cesarsky Date 30.10.2007 update 11.07.2014 GOODS/FORS2 Final Data Release: Version 3.0 As part of the

More information

Produced by NASA Goddard Space Flight Center and the Space Telescope Science Institute.

Produced by NASA Goddard Space Flight Center and the Space Telescope Science Institute. National Aeronautics and Space Administration Interacting Galaxies Taken from: Hubble 2008: Science Year in Review Produced by NASA Goddard Space Flight Center and the Space Telescope Science Institute.

More information

Introduction of near-infrared (NIR) spectroscopy. Ken-ichi Tadaki (NAOJ)

Introduction of near-infrared (NIR) spectroscopy. Ken-ichi Tadaki (NAOJ) Introduction of near-infrared (NIR) spectroscopy Ken-ichi Tadaki (NAOJ) Near-infrared in astronomy absorption by terrestrial atmosphere - wavelength range of 1-5 um - observable windows are limited (J,

More information

BigBOSS Data Reduction Software

BigBOSS Data Reduction Software BigBOSS Data Reduction Software The University of Utah Department of Physics & Astronomy The Premise BigBOSS data reduction software is as important as BigBOSS data collection hardware to the scientific

More information

ABSTRACT. Title: The Accuracy of the Photometric Redshift of Galaxy Clusters

ABSTRACT. Title: The Accuracy of the Photometric Redshift of Galaxy Clusters ABSTRACT Name: Elizabeth A. Holden Department: Physics Title: The Accuracy of the Photometric Redshift of Galaxy Clusters Major: Physics Degree: Master of Science Approved by: Date: Thesis Director NORTHERN

More information

Exploring Data. Keck LRIS spectra. Handbook of CCD Astronomy by Steve Howell Chap. 4, parts of 6

Exploring Data. Keck LRIS spectra. Handbook of CCD Astronomy by Steve Howell Chap. 4, parts of 6 Exploring Data Keck LRIS spectra Handbook of CCD Astronomy by Steve Howell Chap. 4, parts of 6 FITS: Flexible Image Transport System Digital file format used to store astronomical images, data, and catalogs.

More information

Halo Tidal Star Streams with DECAM. Brian Yanny Fermilab. DECam Community Workshop NOAO Tucson Aug

Halo Tidal Star Streams with DECAM. Brian Yanny Fermilab. DECam Community Workshop NOAO Tucson Aug Halo Tidal Star Streams with DECAM Brian Yanny Fermilab DECam Community Workshop NOAO Tucson Aug 19 2011 M31 (Andromeda) Our Local Group neighbors: Spiral galaxies similar to The Milky Way 150 kpc M33

More information

Galaxy Clusters. Giants of the Universe. Maciej Soltynski. ASSA Symposium Virgo cluster around M86

Galaxy Clusters. Giants of the Universe. Maciej Soltynski. ASSA Symposium Virgo cluster around M86 Galaxy Clusters Giants of the Universe Maciej Soltynski ASSA Symposium 2012 Virgo cluster around M86 Why am I talking about galaxy clusters? (they are very faint objects) They are the biggest objects we

More information

arxiv:astro-ph/ v1 30 Aug 2001

arxiv:astro-ph/ v1 30 Aug 2001 TRACING LUMINOUS AND DARK MATTER WITH THE SLOAN DIGITAL SKY SURVEY J. LOVEDAY 1, for the SDSS collaboration 1 Astronomy Centre, University of Sussex, Falmer, Brighton, BN1 9QJ, England arxiv:astro-ph/18488v1

More information

HETDEX Overview. Hobby Eberly Telescope Dark Energy Experiment. HETDEX is: HETDEX enables a lot of ancillary science. HETDEX Science Workshop Feb 09

HETDEX Overview. Hobby Eberly Telescope Dark Energy Experiment. HETDEX is: HETDEX enables a lot of ancillary science. HETDEX Science Workshop Feb 09 Introduction to WFU, VIRUS, & DEX Gary J. Hill, McDonald Observatory Scope What HETDEX is WFU VIRUS DEX survey parameters 1 HETDEX is: Upgrade of HET to have a new 22 arcmin wide field of view Deployment

More information

Astr 511: Galactic Astronomy. Winter Quarter 2015, University of Washington, Željko Ivezić. Lecture 1:

Astr 511: Galactic Astronomy. Winter Quarter 2015, University of Washington, Željko Ivezić. Lecture 1: Astr 511: Galactic Astronomy Winter Quarter 2015, University of Washington, Željko Ivezić Lecture 1: Review of Stellar Astrophysics (and other useful stuff) 1 Understanding Galaxy Properties and the Milky

More information

PHYS/ASTR 2060 Popular Observational Astronomy(3) Syllabus

PHYS/ASTR 2060 Popular Observational Astronomy(3) Syllabus PHYS/ASTR 2060 Popular Observational Astronomy(3) Syllabus Instructor: Prof. Wayne Springer (wayne.springer@utah.edu) Office: 226 INSCC (Office Hours: T 3PM-5PM or by appt.) Phone: 801-585-1390 TA: Jinqi

More information

LARGE QUASAR GROUPS. Kevin Rahill Astrophysics

LARGE QUASAR GROUPS. Kevin Rahill Astrophysics LARGE QUASAR GROUPS Kevin Rahill Astrophysics QUASARS Quasi-stellar Radio Sources Subset of Active Galactic Nuclei AGNs are compact and extremely luminous regions at the center of galaxies Identified as

More information

Lecture 11 Quiz 2. AGN and You. A Brief History of AGN. This week's topics

Lecture 11 Quiz 2. AGN and You. A Brief History of AGN. This week's topics Lecture 11 Quiz 2 AGN and You March 25 2003 8:00 PM BPS 1420 1. What system of time do astronomers use rather than the standard day-month-year system? 2. In that system, how long would it be between noon

More information

Automatic Unsupervised Spectral Classification of all SDSS/DR7 Galaxies

Automatic Unsupervised Spectral Classification of all SDSS/DR7 Galaxies Automatic Unsupervised Spectral Classification of all SDSS/DR7 Galaxies J. Sánchez Almeida, J. A. L. Aguerri, C. Muñoz-Tuñón, A. de Vicente Instituto de Astrofisica de Canarias, Spain 2010, ApJ, 714, 487

More information

Current Status of Chinese Virtual Observatory

Current Status of Chinese Virtual Observatory Current Status of Chinese Virtual Observatory Chenzhou Cui, Yongheng Zhao National Astronomical Observatories, Chinese Academy of Science, Beijing 100012, P. R. China Dec. 30, 2002 General Information

More information

Active Galactic Nuclei (AGNs): A type of AGNs: Quasars. Whatever is powering these QSO s must be very small!!

Active Galactic Nuclei (AGNs): A type of AGNs: Quasars. Whatever is powering these QSO s must be very small!! Active Galactic Nuclei (AGNs): Galaxies with lots of activity AST 101 General Astronomy: Stars & Galaxies Some galaxies at high redshift (large lookback times) have extremely active centers More than 1000

More information

ASTERICS - H Abell 1656: the Coma Cluster of Galaxies

ASTERICS - H Abell 1656: the Coma Cluster of Galaxies ASTERICS - H2020-653477 Abell 1656: the Coma Cluster of Galaxies Massimo Ramella & Giulia Lafrate INAF - Osservatorio Astronomico di Trieste Caroline Bot & Thomas Boch updated for the doctoral day in Paris

More information

AUTOMATIC MORPHOLOGICAL CLASSIFICATION OF GALAXIES. 1. Introduction

AUTOMATIC MORPHOLOGICAL CLASSIFICATION OF GALAXIES. 1. Introduction AUTOMATIC MORPHOLOGICAL CLASSIFICATION OF GALAXIES ZSOLT FREI Institute of Physics, Eötvös University, Budapest, Pázmány P. s. 1/A, H-1117, Hungary; E-mail: frei@alcyone.elte.hu Abstract. Sky-survey projects

More information