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