{
  "bibcode": "2019GCN.24172....1L",
  "body": "Michael J. Lundquist (UA), Kerry Paterson, Wen-fai Fong (Northwestern),\nDavid J. Sand (UA), Stefano Valenti (UC Davis), Sheng Yang (INAF-OAPd, UC\nDavis), Sam Wyatt (UA), Eric Christensen, Alex Gibbs, Frank Shelly\n(UA/LPL), Jennifer Andrews (UA) report:\n\nWe initiated observations of 12 fields (each 2.26 x 2.26 deg^2) within the\nLVC localization region for the GW trigger S190425z (LVC Circ 24168)\nstarting on 2019-04-25 9:01 UT. SAGUARO* uses the 1.5m Catalina Sky Survey\ntelescope on Mt. Lemmon, AZ and its 5 deg^2 imager to tile the highest\nprobability regions of the LVC localization that are accessible from\nsouthern Arizona in order to search for electromagnetic counterparts to\ngravitational wave events. The typical limiting magnitudes of single\npointings are G~21 mag (calibrated to Gaia DR2). Below are the field\ncenters observed. Any interesting transient candidates will be reported as\nsoon as possible.\n\nRA DEC\n244.2855 20.9792\n245.7690 18.7708\n247.2150 16.5625\n242.7630 23.1875\n240.4020 25.3958\n237.9450 27.6042\n235.4790 27.6042\n237.9870 25.3958\n240.3945 23.1875\n247.9245 14.3541\n249.3165 12.1458\n235.3845 29.8125\n\n*SAGUARO stands for Searches After Gravitational-waves Using ARizona's\nObservatories. It is a partnership between the University of Arizona and\nNorthwestern University.",
  "circularId": 24172,
  "createdOn": 1556189972000,
  "email": "mlundquist@email.arizona.edu",
  "subject": "LIGO/Virgo S190425z: SAGUARO follow-up observations",
  "submitter": "Michael J. Lundquist at University of Arizona  <mlundquist@email.arizona.edu>",
  "eventId": "LIGO/Virgo S190425z"
}