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.

Details for GLADE (Q3C) record

Item Value
ID 20
Hyperleda (PGC) Code 44086
GWGC Name NGC4808
Hyperleda (PGC) Name NGC4808
2MASS Name 12554894+0418147
SDSS-DR12 Name null
RA (J2000°) 193.953918
Dec (J2000°) 4.304094
Luminosity Distance (Mpc) 55.2322662187
δLuminosity Distance (Mpc) ± None
z (Redshift) 0.012767
B Magnitude (apparent) 11.928
δB Magnitude (apparent) ± None
B Magnitude (absolute) None
J Magnitude (apparent) 10.099
δJ Magnitude (apparent) ± 0.017
H Magnitude (apparent) 9.458
δH Magnitude (apparent) ± 0.022
K Magnitude (apparent) 9.153
δK Magnitude (apparent) ± 0.03
Flag1 G
Flag2 3
Flag3 0