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 21
Hyperleda (PGC) Code 40562
GWGC Name NGC4387
Hyperleda (PGC) Name NGC4387
2MASS Name 12254171+1248372
SDSS-DR12 Name null
RA (J2000°) 186.423813
Dec (J2000°) 12.810359
Luminosity Distance (Mpc) 17.9472250389
δLuminosity Distance (Mpc) ± None
z (Redshift) 0.00417669208835
B Magnitude (apparent) 12.82
δB Magnitude (apparent) ± 0.3
B Magnitude (absolute) None
J Magnitude (apparent) 10.131
δJ Magnitude (apparent) ± 0.013
H Magnitude (apparent) 9.439
δH Magnitude (apparent) ± 0.018
K Magnitude (apparent) 9.234
δK Magnitude (apparent) ± 0.02
Flag1 G
Flag2 3
Flag3 0