The Steward Alerts for Science System (SASSy) provides access to various alerts and cross-correlation with catalogs. We provide support for queries to alerts and database(s) sourced from the Galaxy List for the Advanced Detector Era (GLADE), the Gravitational Wave Galaxy Catalog (GWGC), (ad-hoc) alerts from the Laser Interferometer Gravitational-Wave Observatory (LIGO), the Transient Name Server (TNS) and the Zwicky Transient Facility (ZTF). Further information is available in the (help) and (api) sections.
These pages are adapted from the code from LCOGT (Las Cumbres Observatory Global Telescope) which delivers the MARS (Make Alerts Really Simple) website.
Galaxy List for the Advanced Detector Era (glade v2.3) Description
Column Name Description 1 PGC PGC number 2 GWGC Name in the GWGC catalog 3 HyperLEDA Name in the HyperLEDA catalog 4 2MASS Name in the 2MASS XSC catalog 5 SDSS Name in the SDSS-DR12 QSO catalog 6 flag1 Q: source is from the SDSS-DR12 QSO catalog C: source is a globular cluster G: source is from another catalog and not identified as a globular cluster 7 RA Right ascension [deg] 8 Dec Declination [deg] 9 Dist Luminosity distance [Mpc] 10 Dist_err Error of distance [Mpc] 11 z Redshift 12 B Apparent B magnitude 13 B_err Error of apparent B magnitude 14 B_abs Absolute B magnitude 15 J Apparent J magnitude 16 J_err Error of apparent J magnitude 17 H Apparent H magnitude 18 H_err Error of apparent H magnitude 19 K Apparent K magnitude 20 K_err Error of apparent K magnitude 21 flag2 0: galaxy had neither measured distance nor measured redshift value 1: galaxy had measured redshift value, from which we have calculated distance using the following cosmological parameters: H_0=70/km/s/Mpc, Omega_M=0.27 and Omega_Lambda=0.73 2: galaxy had measured distance value from which we have calculated redshift using the following cosmological parameters: H_0=70/km/s/Mp, Omega_M=0.27 and Omega_Lambda=0.73 3: measured photometric redshift of the galaxy has been changed to spectroscopic redshift, from which we have calculated distance using the following cosmological parameters: H_0=70/km/s/Mpc, Omega_M=0.27 and Omega_Lambda=0.73 22 flag3 0: velocity field correction has not been applied to the object 1: we have subtracted the radial velocity of the object