{
  "id": "1804.08971",
  "version": "v1",
  "published": "2018-04-24T12:01:28.000Z",
  "updated": "2018-04-24T12:01:28.000Z",
  "title": "Investigating a population of infrared-bright gamma-ray burst host galaxies",
  "authors": [
    "Ashley Chrimes",
    "Elizabeth Stanway",
    "Andrew Levan",
    "Luke Davies",
    "Charlotte Angus",
    "Stephanie Greis"
  ],
  "comment": "Accepted for publication in MNRAS",
  "categories": [
    "astro-ph.GA",
    "astro-ph.HE"
  ],
  "abstract": "We identify and explore the properties of an infrared-bright gamma-ray burst (GRB) host population. Candidate hosts are selected by coincidence with sources in WISE, with matching to random coordinates and a false alarm probability analysis showing that the contamination fraction is approx 0.5. This methodology has already identified the host galaxy of GRB 080517. We combine survey photometry from Pan-STARRS, SDSS, APASS, 2MASS, GALEX and WISE with our own WHT/ACAM and VLT/X- shooter observations to classify the candidates and identify interlopers. Galaxy SED fitting is performed using MAGPHYS, in addition to stellar template fitting, yielding 13 possible IR-bright hosts. A further 7 candidates are identified from previously published work. We report a candidate host for GRB 061002, previously unidentified as such. The remainder of the galaxies have already been noted as potential hosts. Comparing the IR-bright population properties including redshift z, stellar mass M*, star formation rate SFR and V-band attenuation Av to GRB host catalogues in the literature, we find that the infrared-bright population is biased toward low z, high M* and high Av. This naturally arises from their initial selection - local and dusty galaxies are more likely to have the required IR flux to be detected in WISE. We conclude that while IR-bright GRB hosts are not a physically distinct class, they are useful for constraining existing GRB host populations, particularly for long GRBs.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2018-04-24T12:01:28.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "host galaxy",
      "infrared-bright gamma-ray burst host galaxies",
      "existing grb host populations",
      "alarm probability analysis showing"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}