Hubble space telescope STIS observations of GRB 000301C

CCD imaging and near-ultraviolet MAMA spectroscopy

Alain Smette, Andrew S. Fruchter, Theodore R. Gull, Kailash C. Sahu, Larry Petro, Henry Ferguson, James Rhoads, Don J. Lindler, Rachel Gibbons, David W. Hogg, Chryssa Kouveliotou, Mario Livio, Duccio Macchetto, Mark R. Metzger, Holger Pedersen, Elena Pian, Stephen E. Thorsett, Ralph A M J Wijers, Johan P U Fynbo, Javier Gorosabel & 7 others Jens Hjorth, Brian L. Jensen, Alan Levine, Donald A. Smith, Tom Cline, Kevin Hurley, Jack Trombka

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

We present Space Telescope Imaging Spectrograph observations of the optical transient (OT) counter-part of the γ-ray burster GRB 000301C obtained 5 days after the burst, on 2000 March 6. CCD clearaperture imaging reveals a R ≃ 21.50 ± 0.15 source with no apparent host galaxy. An 8000 s, 1150 Å < λ < 3300 Å near-ultraviolet MAMA prism spectrum shows a flat or slightly rising continuum (in fλ) between 2800 and 3300 Å, with a mean flux of (8.7+0.8 -1.6 ± 2.6) × 10-18 ergs s-1 cm-2 Å-1, and a sharp break centered at 2797 ± 25 Å. We interpret this as the H I Lyman break at z = 2.067 ± 0.025, indicating the presence of a cloud with an H I column density log NH I(cm2) > 18 on the line of sight to the OT. This measured redshift is conservatively a lower limit to the GRB redshift. However, as all other GRBs that have deep Hubble Space Telescope images appear to lie on the stellar field of a host galaxy, and as the large H I column density measured here and in later ground-based observations is unlikely on a random line of sight, we believe we are probably seeing absorption from H I in the host galaxy. In any case, this represents the largest direct redshift determination of a γ-ray burster to date. Our data are compatible with an OT spectrum represented by a power law with an intrinsic index α = 1.2 (fv ∝ v) and no extinction in the host galaxy, or with α = 0.5 and extinction by SMC-like dust in the OT rest frame with Av = 0.15. The large NH I and the lack of a detected host are similar to the situation for damped Lyα absorbers at z > 2.

Original languageEnglish (US)
Pages (from-to)70-76
Number of pages7
JournalAstrophysical Journal
Volume556
Issue number1 PART 1
DOIs
StatePublished - Jul 20 2001
Externally publishedYes

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ultraviolet spectroscopy
Hubble Space Telescope
charge coupled devices
extinction
spectroscopy
galaxies
erg
line of sight
rays
power law
dust
star distribution
prisms
spectrographs
bursts
absorbers
counters
telescopes
continuums
index

Keywords

  • Gamma rays: bursts

ASJC Scopus subject areas

  • Space and Planetary Science

Cite this

Smette, A., Fruchter, A. S., Gull, T. R., Sahu, K. C., Petro, L., Ferguson, H., ... Trombka, J. (2001). Hubble space telescope STIS observations of GRB 000301C: CCD imaging and near-ultraviolet MAMA spectroscopy. Astrophysical Journal, 556(1 PART 1), 70-76. https://doi.org/10.1086/321585

Hubble space telescope STIS observations of GRB 000301C : CCD imaging and near-ultraviolet MAMA spectroscopy. / Smette, Alain; Fruchter, Andrew S.; Gull, Theodore R.; Sahu, Kailash C.; Petro, Larry; Ferguson, Henry; Rhoads, James; Lindler, Don J.; Gibbons, Rachel; Hogg, David W.; Kouveliotou, Chryssa; Livio, Mario; Macchetto, Duccio; Metzger, Mark R.; Pedersen, Holger; Pian, Elena; Thorsett, Stephen E.; Wijers, Ralph A M J; Fynbo, Johan P U; Gorosabel, Javier; Hjorth, Jens; Jensen, Brian L.; Levine, Alan; Smith, Donald A.; Cline, Tom; Hurley, Kevin; Trombka, Jack.

In: Astrophysical Journal, Vol. 556, No. 1 PART 1, 20.07.2001, p. 70-76.

Research output: Contribution to journalArticle

Smette, A, Fruchter, AS, Gull, TR, Sahu, KC, Petro, L, Ferguson, H, Rhoads, J, Lindler, DJ, Gibbons, R, Hogg, DW, Kouveliotou, C, Livio, M, Macchetto, D, Metzger, MR, Pedersen, H, Pian, E, Thorsett, SE, Wijers, RAMJ, Fynbo, JPU, Gorosabel, J, Hjorth, J, Jensen, BL, Levine, A, Smith, DA, Cline, T, Hurley, K & Trombka, J 2001, 'Hubble space telescope STIS observations of GRB 000301C: CCD imaging and near-ultraviolet MAMA spectroscopy', Astrophysical Journal, vol. 556, no. 1 PART 1, pp. 70-76. https://doi.org/10.1086/321585
Smette, Alain ; Fruchter, Andrew S. ; Gull, Theodore R. ; Sahu, Kailash C. ; Petro, Larry ; Ferguson, Henry ; Rhoads, James ; Lindler, Don J. ; Gibbons, Rachel ; Hogg, David W. ; Kouveliotou, Chryssa ; Livio, Mario ; Macchetto, Duccio ; Metzger, Mark R. ; Pedersen, Holger ; Pian, Elena ; Thorsett, Stephen E. ; Wijers, Ralph A M J ; Fynbo, Johan P U ; Gorosabel, Javier ; Hjorth, Jens ; Jensen, Brian L. ; Levine, Alan ; Smith, Donald A. ; Cline, Tom ; Hurley, Kevin ; Trombka, Jack. / Hubble space telescope STIS observations of GRB 000301C : CCD imaging and near-ultraviolet MAMA spectroscopy. In: Astrophysical Journal. 2001 ; Vol. 556, No. 1 PART 1. pp. 70-76.
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abstract = "We present Space Telescope Imaging Spectrograph observations of the optical transient (OT) counter-part of the γ-ray burster GRB 000301C obtained 5 days after the burst, on 2000 March 6. CCD clearaperture imaging reveals a R ≃ 21.50 ± 0.15 source with no apparent host galaxy. An 8000 s, 1150 {\AA} < λ < 3300 {\AA} near-ultraviolet MAMA prism spectrum shows a flat or slightly rising continuum (in fλ) between 2800 and 3300 {\AA}, with a mean flux of (8.7+0.8 -1.6 ± 2.6) × 10-18 ergs s-1 cm-2 {\AA}-1, and a sharp break centered at 2797 ± 25 {\AA}. We interpret this as the H I Lyman break at z = 2.067 ± 0.025, indicating the presence of a cloud with an H I column density log NH I(cm2) > 18 on the line of sight to the OT. This measured redshift is conservatively a lower limit to the GRB redshift. However, as all other GRBs that have deep Hubble Space Telescope images appear to lie on the stellar field of a host galaxy, and as the large H I column density measured here and in later ground-based observations is unlikely on a random line of sight, we believe we are probably seeing absorption from H I in the host galaxy. In any case, this represents the largest direct redshift determination of a γ-ray burster to date. Our data are compatible with an OT spectrum represented by a power law with an intrinsic index α = 1.2 (fv ∝ v-α) and no extinction in the host galaxy, or with α = 0.5 and extinction by SMC-like dust in the OT rest frame with Av = 0.15. The large NH I and the lack of a detected host are similar to the situation for damped Lyα absorbers at z > 2.",
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T1 - Hubble space telescope STIS observations of GRB 000301C

T2 - CCD imaging and near-ultraviolet MAMA spectroscopy

AU - Smette, Alain

AU - Fruchter, Andrew S.

AU - Gull, Theodore R.

AU - Sahu, Kailash C.

AU - Petro, Larry

AU - Ferguson, Henry

AU - Rhoads, James

AU - Lindler, Don J.

AU - Gibbons, Rachel

AU - Hogg, David W.

AU - Kouveliotou, Chryssa

AU - Livio, Mario

AU - Macchetto, Duccio

AU - Metzger, Mark R.

AU - Pedersen, Holger

AU - Pian, Elena

AU - Thorsett, Stephen E.

AU - Wijers, Ralph A M J

AU - Fynbo, Johan P U

AU - Gorosabel, Javier

AU - Hjorth, Jens

AU - Jensen, Brian L.

AU - Levine, Alan

AU - Smith, Donald A.

AU - Cline, Tom

AU - Hurley, Kevin

AU - Trombka, Jack

PY - 2001/7/20

Y1 - 2001/7/20

N2 - We present Space Telescope Imaging Spectrograph observations of the optical transient (OT) counter-part of the γ-ray burster GRB 000301C obtained 5 days after the burst, on 2000 March 6. CCD clearaperture imaging reveals a R ≃ 21.50 ± 0.15 source with no apparent host galaxy. An 8000 s, 1150 Å < λ < 3300 Å near-ultraviolet MAMA prism spectrum shows a flat or slightly rising continuum (in fλ) between 2800 and 3300 Å, with a mean flux of (8.7+0.8 -1.6 ± 2.6) × 10-18 ergs s-1 cm-2 Å-1, and a sharp break centered at 2797 ± 25 Å. We interpret this as the H I Lyman break at z = 2.067 ± 0.025, indicating the presence of a cloud with an H I column density log NH I(cm2) > 18 on the line of sight to the OT. This measured redshift is conservatively a lower limit to the GRB redshift. However, as all other GRBs that have deep Hubble Space Telescope images appear to lie on the stellar field of a host galaxy, and as the large H I column density measured here and in later ground-based observations is unlikely on a random line of sight, we believe we are probably seeing absorption from H I in the host galaxy. In any case, this represents the largest direct redshift determination of a γ-ray burster to date. Our data are compatible with an OT spectrum represented by a power law with an intrinsic index α = 1.2 (fv ∝ v-α) and no extinction in the host galaxy, or with α = 0.5 and extinction by SMC-like dust in the OT rest frame with Av = 0.15. The large NH I and the lack of a detected host are similar to the situation for damped Lyα absorbers at z > 2.

AB - We present Space Telescope Imaging Spectrograph observations of the optical transient (OT) counter-part of the γ-ray burster GRB 000301C obtained 5 days after the burst, on 2000 March 6. CCD clearaperture imaging reveals a R ≃ 21.50 ± 0.15 source with no apparent host galaxy. An 8000 s, 1150 Å < λ < 3300 Å near-ultraviolet MAMA prism spectrum shows a flat or slightly rising continuum (in fλ) between 2800 and 3300 Å, with a mean flux of (8.7+0.8 -1.6 ± 2.6) × 10-18 ergs s-1 cm-2 Å-1, and a sharp break centered at 2797 ± 25 Å. We interpret this as the H I Lyman break at z = 2.067 ± 0.025, indicating the presence of a cloud with an H I column density log NH I(cm2) > 18 on the line of sight to the OT. This measured redshift is conservatively a lower limit to the GRB redshift. However, as all other GRBs that have deep Hubble Space Telescope images appear to lie on the stellar field of a host galaxy, and as the large H I column density measured here and in later ground-based observations is unlikely on a random line of sight, we believe we are probably seeing absorption from H I in the host galaxy. In any case, this represents the largest direct redshift determination of a γ-ray burster to date. Our data are compatible with an OT spectrum represented by a power law with an intrinsic index α = 1.2 (fv ∝ v-α) and no extinction in the host galaxy, or with α = 0.5 and extinction by SMC-like dust in the OT rest frame with Av = 0.15. The large NH I and the lack of a detected host are similar to the situation for damped Lyα absorbers at z > 2.

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