{
  "bibcode": "2015GCN.18519....1C",
  "body": "Z. Cano (U. Iceland), D. Malesani (DARK/NBI), Jussi Harmanen (NOT & U.\nTurku), Thomas Reynolds (NOT & U. Turku.),  Pere Blay Serrano (IAC/NOT) and\nP. Jakobsson (U. Iceland) report on behalf of a larger collaboration:\n\nWe observed the field of Swift GRB 151027A (Maselli et al., GCN Circ.\n18478) with the Nordic Optical Telescope equipped with the StanCam\n(optical) and NOTCam (NIR) imagers, in filters BVRI and JHK, respectively.\nObservations started at 20:53 UT on 27 October 2015.  The OT (Maselli et\nal.) is detected all filters.\n\nA summary of our observations follows:\n\nFilter       t-t0 (hr)      Mag +- Merr\n-----------------------------------------\nB            17.94          21.4 +- 0.2\nR            18.17          20.6 +- 0.1\nI            18.28          19.2 +- 0.1\nJ            16.92          18.2 +- 0.1\nH            17.38          18.3 +- 0.1\nK            17.60          17.2 +- 0.2\n\nThe optical filters are calibrated to USNO-B1 and the NIR filters to 2MASS,\nwhere a single star that appeared in both catalogs was used for the\nzeropoint calculation.  These magnitudes are not corrected for foreground\nextinction.\n\nWhen these extinguished magnitudes are converted to monochromatic fluxes\n(using the zeropoints from Fukugita et al. 1995; Hewett et al. 2006), a\nsingle power-law with an exponent of -1.25 provides an acceptable fit to\nthe optical-to-NIR spectral energy distribution.\n\n���",
  "circularId": 18519,
  "createdOn": 1446056021000,
  "email": "zewcano@gmail.com",
  "subject": "GRB 151027A: NOT optical and NIR observations",
  "submitter": "Zach Cano at U of Iceland  <zewcano@gmail.com>",
  "eventId": "GRB 151027A"
}