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Titolo:
Spectroscopy of the host galaxy of the gamma-ray burst 980703
Autore:
Djorgovski, SG; Kulkarni, SR; Bloom, JS; Goodrich, R; Frail, DA; Piro, L; Palazzi, E;
Indirizzi:
CALTECH, Palomar Observ, Pasadena, CA 91125 USA CALTECH Pasadena CA USA 91125 ECH, Palomar Observ, Pasadena, CA 91125 USA WM Keck Observ, Kamuela, HI 96743 USA WM Keck Observ Kamuela HI USA 96743WM Keck Observ, Kamuela, HI 96743 USA Natl Radio Astron Observ, Socorro, NM 87801 USA Natl Radio Astron Observ Socorro NM USA 87801 serv, Socorro, NM 87801 USA CNR, Ist Astrofis Spaziale, I-00133 Rome, Italy CNR Rome Italy I-00133CNR, Ist Astrofis Spaziale, I-00133 Rome, Italy CNR, Ist Tecnol & Studio Radiaz Extraterr, I-40129 Bologna, Italy CNR Bologna Italy I-40129 tudio Radiaz Extraterr, I-40129 Bologna, Italy
Titolo Testata:
ASTROPHYSICAL JOURNAL
fascicolo: 1, volume: 508, anno: 1998,
parte:, 2
pagine: L17 - L20
SICI:
0004-637X(19981120)508:1<L17:SOTHGO>2.0.ZU;2-G
Fonte:
ISI
Lingua:
ENG
Soggetto:
28 FEBRUARY 1997; OPTICAL COUNTERPART; EMISSION; REDSHIFT;
Keywords:
cosmology : miscellaneous; cosmology : observations; gamma rays : bursts;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
43
Recensione:
Indirizzi per estratti:
Indirizzo: Djorgovski, SG CALTECH, Palomar Observ, Pasadena, CA 91125 USA CALTECH Pasadena CA USA 91125 serv, Pasadena, CA 91125 USA
Citazione:
S.G. Djorgovski et al., "Spectroscopy of the host galaxy of the gamma-ray burst 980703", ASTROPHYS J, 508(1), 1998, pp. L17-L20

Abstract

We present spectroscopic observations of the host galaxy of GRB 980703. Several emission and absorption features are detected, making the redshift (z= 0.966) completely unambiguous. This is only the third known redshift fora gamma-ray burst (GRB) host. The implied isotropic gamma-ray energy release from the burst is in excess of 10(53) ergs for a reasonable choice of cosmological parameters. The spectroscopic properties of the host galaxy are typical for a star formation-powered object. Using the observed value of the Balmer decrement, we derived the extinction in the galaxy's rest frame: A(v) approximate to 0.3 +/- 0.3 mag. Using three different star formation rate (SFR) indicators, we estimate SFR approximate to 10 M-. yr(-1) or higher, depending on the extinction, with a lower limit of SFR > 7 M-. yr(-1). This is the highest value of the SFR measured for a GRB galaxy so far, and itgives some support to the idea that GRBs are closely related to massive star formation.

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Documento generato il 18/11/17 alle ore 03:37:22