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 30
Hyperleda (PGC) Code 41376
GWGC Name NGC4491
Hyperleda (PGC) Name NGC4491
2MASS Name 12305713+1129007
SDSS-DR12 Name null
RA (J2000°) 187.738052
Dec (J2000°) 11.48355
Luminosity Distance (Mpc) 41.9978294469
δLuminosity Distance (Mpc) ± None
z (Redshift) 0.009731
B Magnitude (apparent) 12.7
δB Magnitude (apparent) ± None
B Magnitude (absolute) None
J Magnitude (apparent) 10.932
δJ Magnitude (apparent) ± 0.022
H Magnitude (apparent) 10.293
δH Magnitude (apparent) ± 0.026
K Magnitude (apparent) 10.067
δK Magnitude (apparent) ± 0.033
Flag1 G
Flag2 3
Flag3 0