Evidence for a supernova associated with the X-ray flash 020903

D. Bersier, A. S. Fruchter, L. G. Strolger, J. Gorosabel, A. Levan, I. Burud, J. E. Rhoads, A. C. Becker, A. Cassan, R. Chornock, S. Covino, R. S. De Jong, D. Dominis, A. V. Filippenko, J. Hiorth, J. Holmberg, D. Malesani, B. Mobasher, K. A G Olsen, M. StefanonJ. M. Castro Cerón, J. P U Fynbo, S. T. Holland, C. Kouveliotou, H. Pedersen, N. R. Tanvir, S. E. Woosley

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

We present ground-based and Hubble Space Telescope optical observations of the X-ray flash (XRF) 020903, covering 300 days. The afterglow showed a very rapid rise in the first day, followed by a relatively slow decay in the next few days. There was a clear bump in the light curve after ∼25 days, accompanied by a drastic change in the spectral energy distribution. The light curve and the spectral energy distribution are naturally interpreted as describing the emergence and subsequent decay of a supernova (SN), similar to SN 1998bw. At peak luminosity, the SN is estimated to be 0.8 ± 0.1 mag fainter than SN 1998bw. This argues in favor of the existence of a SN associated with this XRF. A spectrum obtained 35 days after the burst shows emission lines from the host galaxy. We use this spectrum to put an upper limit on the oxygen abundance of the host at [O/H] < -0.6 dex. We also discuss a possible trend between the softness of several bursts and the early behavior of the optical afterglow, in the sense that XRFs and X-ray-rich gamma-ray bursts (GRBs) seem to have a plateau phase or even a rising light curve. This can be naturally explained in models in which XRFs are similar to GRBs but are seen off the jet axis.

Original languageEnglish (US)
Pages (from-to)284-291
Number of pages8
JournalAstrophysical Journal
Volume643
Issue number1 I
DOIs
StatePublished - May 20 2006
Externally publishedYes

Fingerprint

supernovae
flash
X-ray fluorescence
light curve
spectral energy distribution
afterglows
x rays
gamma ray bursts
bursts
energy
softness
plateau
decay
oxygen
Hubble Space Telescope
plateaus
coverings
luminosity
galaxies
trends

Keywords

  • Gamma rays: bursts
  • Supernovae: general

ASJC Scopus subject areas

  • Space and Planetary Science

Cite this

Bersier, D., Fruchter, A. S., Strolger, L. G., Gorosabel, J., Levan, A., Burud, I., ... Woosley, S. E. (2006). Evidence for a supernova associated with the X-ray flash 020903. Astrophysical Journal, 643(1 I), 284-291. https://doi.org/10.1086/502640

Evidence for a supernova associated with the X-ray flash 020903. / Bersier, D.; Fruchter, A. S.; Strolger, L. G.; Gorosabel, J.; Levan, A.; Burud, I.; Rhoads, J. E.; Becker, A. C.; Cassan, A.; Chornock, R.; Covino, S.; De Jong, R. S.; Dominis, D.; Filippenko, A. V.; Hiorth, J.; Holmberg, J.; Malesani, D.; Mobasher, B.; Olsen, K. A G; Stefanon, M.; Castro Cerón, J. M.; Fynbo, J. P U; Holland, S. T.; Kouveliotou, C.; Pedersen, H.; Tanvir, N. R.; Woosley, S. E.

In: Astrophysical Journal, Vol. 643, No. 1 I, 20.05.2006, p. 284-291.

Research output: Contribution to journalArticle

Bersier, D, Fruchter, AS, Strolger, LG, Gorosabel, J, Levan, A, Burud, I, Rhoads, JE, Becker, AC, Cassan, A, Chornock, R, Covino, S, De Jong, RS, Dominis, D, Filippenko, AV, Hiorth, J, Holmberg, J, Malesani, D, Mobasher, B, Olsen, KAG, Stefanon, M, Castro Cerón, JM, Fynbo, JPU, Holland, ST, Kouveliotou, C, Pedersen, H, Tanvir, NR & Woosley, SE 2006, 'Evidence for a supernova associated with the X-ray flash 020903', Astrophysical Journal, vol. 643, no. 1 I, pp. 284-291. https://doi.org/10.1086/502640
Bersier D, Fruchter AS, Strolger LG, Gorosabel J, Levan A, Burud I et al. Evidence for a supernova associated with the X-ray flash 020903. Astrophysical Journal. 2006 May 20;643(1 I):284-291. https://doi.org/10.1086/502640
Bersier, D. ; Fruchter, A. S. ; Strolger, L. G. ; Gorosabel, J. ; Levan, A. ; Burud, I. ; Rhoads, J. E. ; Becker, A. C. ; Cassan, A. ; Chornock, R. ; Covino, S. ; De Jong, R. S. ; Dominis, D. ; Filippenko, A. V. ; Hiorth, J. ; Holmberg, J. ; Malesani, D. ; Mobasher, B. ; Olsen, K. A G ; Stefanon, M. ; Castro Cerón, J. M. ; Fynbo, J. P U ; Holland, S. T. ; Kouveliotou, C. ; Pedersen, H. ; Tanvir, N. R. ; Woosley, S. E. / Evidence for a supernova associated with the X-ray flash 020903. In: Astrophysical Journal. 2006 ; Vol. 643, No. 1 I. pp. 284-291.
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abstract = "We present ground-based and Hubble Space Telescope optical observations of the X-ray flash (XRF) 020903, covering 300 days. The afterglow showed a very rapid rise in the first day, followed by a relatively slow decay in the next few days. There was a clear bump in the light curve after ∼25 days, accompanied by a drastic change in the spectral energy distribution. The light curve and the spectral energy distribution are naturally interpreted as describing the emergence and subsequent decay of a supernova (SN), similar to SN 1998bw. At peak luminosity, the SN is estimated to be 0.8 ± 0.1 mag fainter than SN 1998bw. This argues in favor of the existence of a SN associated with this XRF. A spectrum obtained 35 days after the burst shows emission lines from the host galaxy. We use this spectrum to put an upper limit on the oxygen abundance of the host at [O/H] < -0.6 dex. We also discuss a possible trend between the softness of several bursts and the early behavior of the optical afterglow, in the sense that XRFs and X-ray-rich gamma-ray bursts (GRBs) seem to have a plateau phase or even a rising light curve. This can be naturally explained in models in which XRFs are similar to GRBs but are seen off the jet axis.",
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T1 - Evidence for a supernova associated with the X-ray flash 020903

AU - Bersier, D.

AU - Fruchter, A. S.

AU - Strolger, L. G.

AU - Gorosabel, J.

AU - Levan, A.

AU - Burud, I.

AU - Rhoads, J. E.

AU - Becker, A. C.

AU - Cassan, A.

AU - Chornock, R.

AU - Covino, S.

AU - De Jong, R. S.

AU - Dominis, D.

AU - Filippenko, A. V.

AU - Hiorth, J.

AU - Holmberg, J.

AU - Malesani, D.

AU - Mobasher, B.

AU - Olsen, K. A G

AU - Stefanon, M.

AU - Castro Cerón, J. M.

AU - Fynbo, J. P U

AU - Holland, S. T.

AU - Kouveliotou, C.

AU - Pedersen, H.

AU - Tanvir, N. R.

AU - Woosley, S. E.

PY - 2006/5/20

Y1 - 2006/5/20

N2 - We present ground-based and Hubble Space Telescope optical observations of the X-ray flash (XRF) 020903, covering 300 days. The afterglow showed a very rapid rise in the first day, followed by a relatively slow decay in the next few days. There was a clear bump in the light curve after ∼25 days, accompanied by a drastic change in the spectral energy distribution. The light curve and the spectral energy distribution are naturally interpreted as describing the emergence and subsequent decay of a supernova (SN), similar to SN 1998bw. At peak luminosity, the SN is estimated to be 0.8 ± 0.1 mag fainter than SN 1998bw. This argues in favor of the existence of a SN associated with this XRF. A spectrum obtained 35 days after the burst shows emission lines from the host galaxy. We use this spectrum to put an upper limit on the oxygen abundance of the host at [O/H] < -0.6 dex. We also discuss a possible trend between the softness of several bursts and the early behavior of the optical afterglow, in the sense that XRFs and X-ray-rich gamma-ray bursts (GRBs) seem to have a plateau phase or even a rising light curve. This can be naturally explained in models in which XRFs are similar to GRBs but are seen off the jet axis.

AB - We present ground-based and Hubble Space Telescope optical observations of the X-ray flash (XRF) 020903, covering 300 days. The afterglow showed a very rapid rise in the first day, followed by a relatively slow decay in the next few days. There was a clear bump in the light curve after ∼25 days, accompanied by a drastic change in the spectral energy distribution. The light curve and the spectral energy distribution are naturally interpreted as describing the emergence and subsequent decay of a supernova (SN), similar to SN 1998bw. At peak luminosity, the SN is estimated to be 0.8 ± 0.1 mag fainter than SN 1998bw. This argues in favor of the existence of a SN associated with this XRF. A spectrum obtained 35 days after the burst shows emission lines from the host galaxy. We use this spectrum to put an upper limit on the oxygen abundance of the host at [O/H] < -0.6 dex. We also discuss a possible trend between the softness of several bursts and the early behavior of the optical afterglow, in the sense that XRFs and X-ray-rich gamma-ray bursts (GRBs) seem to have a plateau phase or even a rising light curve. This can be naturally explained in models in which XRFs are similar to GRBs but are seen off the jet axis.

KW - Gamma rays: bursts

KW - Supernovae: general

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