The first two host galaxies of X-ray flashes

XRF 011030 and XRF 020427

J. S. Bloom, Derek Brindley Fox, P. G. Van Dokkum, S. R. Kulkarni, E. Berger, S. G. Djorgovski, D. A. Frail

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

Given the paucity of empirical constraints, the nature of the newly recognized phenomena called X-ray flashes (XRFs) has been an open question. However, with the recent detections of radio and X-ray afterglow it is finally possible to study the large- and small-scale environments of XRFs. We present Chandra, Hubble Space Telescope (HST), and Keck observations of the fields of XRFs 011030 and 020427. Astrometric comparisons of the X-ray transient positions and the HST images reveal the XRFs to be associated with faint blue galaxies. Photometric evidence of these putative hosts suggests that these two XRFs originated from redshifts less than z ∼ 3.5, and thus cannot be due to GRBs at very high redshifts. In both host-burst offsets and host properties, these XRFs could have been drawn from distributions similar to those measured of gamma-ray bursts (GRBs). We conclude with a discussion of the implications of this XRF-GRB host connection for the possible progenitors of XRFs.

Original languageEnglish (US)
Pages (from-to)957-963
Number of pages7
JournalAstrophysical Journal
Volume599
Issue number2 I
DOIs
StatePublished - Dec 20 2003

Fingerprint

flash
galaxies
x rays
gamma ray bursts
Hubble Space Telescope
afterglows
bursts
radio

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Bloom, J. S., Fox, D. B., Van Dokkum, P. G., Kulkarni, S. R., Berger, E., Djorgovski, S. G., & Frail, D. A. (2003). The first two host galaxies of X-ray flashes: XRF 011030 and XRF 020427. Astrophysical Journal, 599(2 I), 957-963. https://doi.org/10.1086/379310
Bloom, J. S. ; Fox, Derek Brindley ; Van Dokkum, P. G. ; Kulkarni, S. R. ; Berger, E. ; Djorgovski, S. G. ; Frail, D. A. / The first two host galaxies of X-ray flashes : XRF 011030 and XRF 020427. In: Astrophysical Journal. 2003 ; Vol. 599, No. 2 I. pp. 957-963.
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Bloom, JS, Fox, DB, Van Dokkum, PG, Kulkarni, SR, Berger, E, Djorgovski, SG & Frail, DA 2003, 'The first two host galaxies of X-ray flashes: XRF 011030 and XRF 020427', Astrophysical Journal, vol. 599, no. 2 I, pp. 957-963. https://doi.org/10.1086/379310

The first two host galaxies of X-ray flashes : XRF 011030 and XRF 020427. / Bloom, J. S.; Fox, Derek Brindley; Van Dokkum, P. G.; Kulkarni, S. R.; Berger, E.; Djorgovski, S. G.; Frail, D. A.

In: Astrophysical Journal, Vol. 599, No. 2 I, 20.12.2003, p. 957-963.

Research output: Contribution to journalArticle

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Bloom JS, Fox DB, Van Dokkum PG, Kulkarni SR, Berger E, Djorgovski SG et al. The first two host galaxies of X-ray flashes: XRF 011030 and XRF 020427. Astrophysical Journal. 2003 Dec 20;599(2 I):957-963. https://doi.org/10.1086/379310