{
  "bibcode": "2019GCN.25461....1D",
  "body": "K. De, M. M. Kasliwal, I. Andreoni, V. Karambelkar, Y. Sharma (Caltech)\n\nreport on behalf of the GROWTH (Global Relay of Observatories Watching\nTransients Happen) collaboration\n\nWe observed DG19wxnjc/AT2019npv (Goldstein et al. GCN 25393)  with NIRES\n(Wilson et al. 2004) on the Keck II telescope starting 2019-08-24 11:41 UT.\nThe host galaxy redshift (Jonker et al. GCN 25454) and light curve (Annis\net al. GCN 25458, Smartt et al. GCN 25455, Chen et al. GCN 25457) hinted at\na possible association with the neutron star black hole merger S190814bv\n(LVC et al. GCN 25324, GCN 25333). Our on-source integration time with\nKeck/NIRES was 40min. We see a mostly featureless continuum from the\ntransient from 0.94 to 2.45 microns. There is possibly a Helium feature\naround 10830A, however, it could be an artifact due to proximity to a\ntelluric feature. Given the lack of obvious identifiable features, we\nencourage deep optical spectroscopy to distinguish between a kilonova\norigin or supernova origin.\n\nWe are grateful to the W. M. Keck Observatory staff, especially Greg\nDoppmann and Terry Stickel, for facilitating this partnership target of\nopportunity observation. We thank the observer Leslie Young for her kind\nco-operation.",
  "circularId": 25461,
  "createdOn": 1566655034000,
  "email": "mansikasliwal@gmail.com",
  "subject": "LIGO/Virgo S190814bv: Keck NIRES spectroscopy of DG19wxnjc/AT2019npv",
  "submitter": "Mansi M. Kasliwal at Caltech/Carnegie  <mansikasliwal@gmail.com>",
  "eventId": "LIGO/Virgo S190814bv"
}