{
  "bibcode": "2017GCN.21908....1M",
  "body": "C. McCully, D. A. Howell, G. Hosseinzadeh, D. Hiramatsu, I. Arcavi, S.\nVasylyev (UCSB/Las Cumbres Obs), S. Valenti (UC Davis)\n\nand\n\nL. P. Singer (NASA/GSFC), C. Fremling (Caltech), and M. M. Kasliwal\n(Caltech) on behalf of the GROWTH (Global Relay of Observatories\nWatching Transients Happen) collaboration report:\n\nWe observed the optical transient, SSS17a/DLT17ck (Coulter et al., LVC GCN\n21529) on 2017-08-19 08:36:22, +1.83 days after the LIGO/Virgo trigger\nG298048 (LVC GCN Circ. 21509, 21513), for one hour with the robotic FLOYDS\ninstrument mounted on the Las Cumbres Observatory Faulkes Telescope South\nat the Siding Spring Observatory in Australia. We detect the continuum of\nthe transient at low signal-to-noise level.\n\nWe also observed SSS17a/DLT17ck on 2017-08-20 01:01:54, +2.51 days after\nthe LIGO/Virgo trigger, with the Gemini Multi-Object Spectrograph (GMOS) on\nthe Gemini-South 8-m telescope. We observed in our red setting for 763\nseconds and 128 seconds in our blue setting until the telescope reached its\naltitude limit. We again detect the continuum at low signal to noise level\ndue to the high airmass at which the observations were made and the limited\nexposure times due to observing constraints.\n\nWe thank the LCO staff, specifically Mark Bowman and Mark Willis, and the\nGemini staff, specifically Karleyne Silva and Laura Ferrarese, for their\nassistance with these observations.",
  "circularId": 21908,
  "createdOn": 1506050684000,
  "email": "cmccully@lco.global",
  "subject": "LIGO/Virgo G298048: LCO FLOYDS and Gemini Spectroscopy",
  "submitter": "Curtis McCully at Las Cumbres Observatory  <cmccully@lco.global>",
  "eventId": "LIGO/Virgo G298048"
}