Dust and gas in the local environments of gamma-ray bursts

Schady, P.; Mason, K.; Page, M.; Romano, P.; Roming, P.; Berg, D.; DE PASQUALE, Massımılıano; Immler, S.

doi:10.1393/ncb/i2007-10240-y

Dust and gas in the local environments of gamma-ray bursts

Schady P., Mason K. O., Page M. J., Romano P., Roming P. W. A., Berg D. V., ...Daha Fazla

NUOVO CIMENTO DELLA SOCIETA ITALIANA DI FISICA B-BASIC TOPICS IN PHYSICS, cilt.121, sa.10-11, ss.1197-1200, 2006 (SCI-Expanded)

Yayın Türü: Makale / Tam Makale
Cilt numarası: 121 Sayı: 10-11
Basım Tarihi: 2006
Doi Numarası: 10.1393/ncb/i2007-10240-y
Dergi Adı: NUOVO CIMENTO DELLA SOCIETA ITALIANA DI FISICA B-BASIC TOPICS IN PHYSICS
Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
Sayfa Sayıları: ss.1197-1200
İstanbul Üniversitesi Adresli: Hayır

Özet

From spectral analysis on the XRT/UVOT Spectral Energy Distribution (SED) on a sample of Swift GRBs we determine the host galaxy hydrogen column density, N-H,N-X, and visual dust-extinction, AV. All but one GRBs have host galaxy dust properties that are most consistent with an SMC or LMC dust extinction law, with a range in AV from 0.11 +/- 0.07 to 0.88(-0.20)(+0.23) mags, although selection effects distort the true AV distribution. We estimate that GR13s with no afterglow detected blueward of 5500 angstrom to have an average rest-frame extinction almost seven times the average in our sample. This may help account for the similar to 1/3 of GRBs observed by Swift that have no afterglow detected by UVOT.