{
  "bibcode": "2017GCN.21982....1L",
  "body": "R. M. Lau (Caltech), E. O. Ofek (Weizmann) and M. M. Kasliwal (Caltech)\nreport on behalf of the Global Relay of Observatories Watching Transients\nHappen (GROWTH) collaboration:\n\nOn 2017 Sept 29.86 UT, the Spitzer space telescope took deep mid-infrared\nobservations at the position of SSS17a (Coulter et al. LVC GCN 21529) with\nChannel 1 (3.6 microns) and Channel 2 (4.5 microns) of the  Infrared Array\nCamera (IRAC).\n\nWe conducted a preliminary analysis of the IRAC Basic Calibrated Data\n(BCD), including both a median filter subtraction and ZOGY image\nsubtraction to remove the extended emission from the host galaxy NGC 4993.\nWe find possible, marginal evidence for excess emission at the position of\nSSS17a at 4.5um. We are continuing monitoring with Spitzer/IRAC.\n\nWe thank the Spitzer Space Telescope team, in particular, Tom Soifer and\nNancy Silbermann, for the rapid review and scheduling of these DDT\nobservations (PI Kasliwal). The Spitzer Space Telescope is operated by the\nJet Propulsion Laboratory, California Institute of Technology under a\ncontract with NASA.",
  "circularId": 21982,
  "createdOn": 1507643874000,
  "email": "mansi@astro.caltech.edu",
  "subject": "LIGO/Virgo G298048: Mid-Infrared Spitzer/IRAC Observations at 3.6 and 4.5 microns",
  "submitter": "Mansi M. Kasliwal at Caltech  <mansi@astro.caltech.edu>",
  "eventId": "LIGO/Virgo G298048"
}