An optically dark GRB observed by HETE-2: GRB 051022

Yujin E. Nakagawa; Atsumasa Yoshida; Satoshi Sugita; Kaoru Tanaka; Nobuyuki Ishikawa; Toru Tamagawa; Motoko Suzuki; Yuji Shirasaki; Nobuyuki Kawai; Masaru Matsuoka; Jean Luc Atteia; Alexandre Pelangeon; Roland Vanderspek; Geoffrey B. Crew; Joel S. Villasenor; Nat Butler; John P. Doty; George R. Ricker; Graziella Pizzichini; Timothy Q. Donaghy; Donald Q. Lamb; Carlo Graziani; Rie Sato; Miki Maetou; Makoto Arimoto; Jun'Ichi Kotoku; J. Garrett Jernigan; Takanori Sakamoto; Jean François Olive; Michel Boer; Edward E. Fenimore; Mark Galassi; Stanford E. Woosley; Makoto Yamauchi; Kunio Takagishi; Isamu Hatsukade

doi:10.1093/pasj/58.4.L35

An optically dark GRB observed by HETE-2: GRB 051022

Yujin E. Nakagawa, Atsumasa Yoshida, Satoshi Sugita, Kaoru Tanaka, Nobuyuki Ishikawa, Toru Tamagawa, Motoko Suzuki, Yuji Shirasaki, Nobuyuki Kawai, Masaru Matsuoka, Jean Luc Atteia, Alexandre Pelangeon, Roland Vanderspek, Geoffrey B. Crew, Joel S. Villasenor, Nat Butler, John P. Doty, George R. Ricker, Graziella Pizzichini, Timothy Q. DonaghyDonald Q. Lamb, Carlo Graziani, Rie Sato, Miki Maetou, Makoto Arimoto, Jun'Ichi Kotoku, J. Garrett Jernigan, Takanori Sakamoto, Jean François Olive, Michel Boer, Edward E. Fenimore, Mark Galassi, Stanford E. Woosley, Makoto Yamauchi, Kunio Takagishi, Isamu Hatsukade

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12 Scopus citations

Abstract

GRB 051022 was detected at 13:07:58 on 2005 October 22 UT by HETE-2. The location of GRB 051022 was determined immediately by the flight localization system. This burst contained multiple pulses, and had a rather long duration of about 190s. The detections of candidate X-ray and radio afterglows were reported, whereas no optical afterglow was found. Optical spectroscopic observations of the host galaxy revealed a redshift of z = 0.8. Using data derived by a HETE-2 observation of the prompt emission, we found absorption of N_H = (8.8_-29^+3.1) x 10²²cm ^-2 and visual extinction of Av = 49_-16⁺¹⁷ mag in the host galaxy. If this is the case, no detection of any optical transient would be quite reasonable. The absorption derived by Swift XRT observations of the afterglow is fully consistent with those obtained from an early HETE-2 observation of the prompt emission. Our analysis implies an interpretation that the absorbing medium may be outside the external shock at R ∼ 10 ¹⁶cm, which could be a dusty molecular cloud.

Original language	English (US)
Pages (from-to)	L35-L39
Journal	Publications of the Astronomical Society of Japan
Volume	58
Issue number	4
DOIs	https://doi.org/10.1093/pasj/58.4.L35
State	Published - 2006
Externally published	Yes

Keywords

Gamma rays: observations
Star: individual (GRB 051022)
X-rays: ISM

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1093/pasj/58.4.L35

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Nakagawa, Y. E., Yoshida, A., Sugita, S., Tanaka, K., Ishikawa, N., Tamagawa, T., Suzuki, M., Shirasaki, Y., Kawai, N., Matsuoka, M., Atteia, J. L., Pelangeon, A., Vanderspek, R., Crew, G. B., Villasenor, J. S., Butler, N., Doty, J. P., Ricker, G. R., Pizzichini, G., ... Hatsukade, I. (2006). An optically dark GRB observed by HETE-2: GRB 051022. Publications of the Astronomical Society of Japan, 58(4), L35-L39. https://doi.org/10.1093/pasj/58.4.L35

Nakagawa, YE, Yoshida, A, Sugita, S, Tanaka, K, Ishikawa, N, Tamagawa, T, Suzuki, M, Shirasaki, Y, Kawai, N, Matsuoka, M, Atteia, JL, Pelangeon, A, Vanderspek, R, Crew, GB, Villasenor, JS, Butler, N, Doty, JP, Ricker, GR, Pizzichini, G, Donaghy, TQ, Lamb, DQ, Graziani, C, Sato, R, Maetou, M, Arimoto, M, Kotoku, JI, Jernigan, JG, Sakamoto, T, Olive, JF, Boer, M, Fenimore, EE, Galassi, M, Woosley, SE, Yamauchi, M, Takagishi, K & Hatsukade, I 2006, 'An optically dark GRB observed by HETE-2: GRB 051022', Publications of the Astronomical Society of Japan, vol. 58, no. 4, pp. L35-L39. https://doi.org/10.1093/pasj/58.4.L35

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title = "An optically dark GRB observed by HETE-2: GRB 051022",

abstract = "GRB 051022 was detected at 13:07:58 on 2005 October 22 UT by HETE-2. The location of GRB 051022 was determined immediately by the flight localization system. This burst contained multiple pulses, and had a rather long duration of about 190s. The detections of candidate X-ray and radio afterglows were reported, whereas no optical afterglow was found. Optical spectroscopic observations of the host galaxy revealed a redshift of z = 0.8. Using data derived by a HETE-2 observation of the prompt emission, we found absorption of NH = (8.8-29+3.1) x 1022cm -2 and visual extinction of Av = 49-16+17 mag in the host galaxy. If this is the case, no detection of any optical transient would be quite reasonable. The absorption derived by Swift XRT observations of the afterglow is fully consistent with those obtained from an early HETE-2 observation of the prompt emission. Our analysis implies an interpretation that the absorbing medium may be outside the external shock at R ∼ 10 16cm, which could be a dusty molecular cloud.",

keywords = "Gamma rays: observations, Star: individual (GRB 051022), X-rays: ISM",

author = "Nakagawa, {Yujin E.} and Atsumasa Yoshida and Satoshi Sugita and Kaoru Tanaka and Nobuyuki Ishikawa and Toru Tamagawa and Motoko Suzuki and Yuji Shirasaki and Nobuyuki Kawai and Masaru Matsuoka and Atteia, {Jean Luc} and Alexandre Pelangeon and Roland Vanderspek and Crew, {Geoffrey B.} and Villasenor, {Joel S.} and Nat Butler and Doty, {John P.} and Ricker, {George R.} and Graziella Pizzichini and Donaghy, {Timothy Q.} and Lamb, {Donald Q.} and Carlo Graziani and Rie Sato and Miki Maetou and Makoto Arimoto and Jun'Ichi Kotoku and Jernigan, {J. Garrett} and Takanori Sakamoto and Olive, {Jean Fran{\c c}ois} and Michel Boer and Fenimore, {Edward E.} and Mark Galassi and Woosley, {Stanford E.} and Makoto Yamauchi and Kunio Takagishi and Isamu Hatsukade",

year = "2006",

doi = "10.1093/pasj/58.4.L35",

language = "English (US)",

volume = "58",

pages = "L35--L39",

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TY - JOUR

T1 - An optically dark GRB observed by HETE-2

T2 - GRB 051022

AU - Nakagawa, Yujin E.

AU - Yoshida, Atsumasa

AU - Sugita, Satoshi

AU - Tanaka, Kaoru

AU - Ishikawa, Nobuyuki

AU - Tamagawa, Toru

AU - Suzuki, Motoko

AU - Shirasaki, Yuji

AU - Kawai, Nobuyuki

AU - Matsuoka, Masaru

AU - Atteia, Jean Luc

AU - Pelangeon, Alexandre

AU - Vanderspek, Roland

AU - Crew, Geoffrey B.

AU - Villasenor, Joel S.

AU - Butler, Nat

AU - Doty, John P.

AU - Ricker, George R.

AU - Pizzichini, Graziella

AU - Donaghy, Timothy Q.

AU - Lamb, Donald Q.

AU - Graziani, Carlo

AU - Sato, Rie

AU - Maetou, Miki

AU - Arimoto, Makoto

AU - Kotoku, Jun'Ichi

AU - Jernigan, J. Garrett

AU - Sakamoto, Takanori

AU - Olive, Jean François

AU - Boer, Michel

AU - Fenimore, Edward E.

AU - Galassi, Mark

AU - Woosley, Stanford E.

AU - Yamauchi, Makoto

AU - Takagishi, Kunio

AU - Hatsukade, Isamu

PY - 2006

Y1 - 2006

N2 - GRB 051022 was detected at 13:07:58 on 2005 October 22 UT by HETE-2. The location of GRB 051022 was determined immediately by the flight localization system. This burst contained multiple pulses, and had a rather long duration of about 190s. The detections of candidate X-ray and radio afterglows were reported, whereas no optical afterglow was found. Optical spectroscopic observations of the host galaxy revealed a redshift of z = 0.8. Using data derived by a HETE-2 observation of the prompt emission, we found absorption of NH = (8.8-29+3.1) x 1022cm -2 and visual extinction of Av = 49-16+17 mag in the host galaxy. If this is the case, no detection of any optical transient would be quite reasonable. The absorption derived by Swift XRT observations of the afterglow is fully consistent with those obtained from an early HETE-2 observation of the prompt emission. Our analysis implies an interpretation that the absorbing medium may be outside the external shock at R ∼ 10 16cm, which could be a dusty molecular cloud.

AB - GRB 051022 was detected at 13:07:58 on 2005 October 22 UT by HETE-2. The location of GRB 051022 was determined immediately by the flight localization system. This burst contained multiple pulses, and had a rather long duration of about 190s. The detections of candidate X-ray and radio afterglows were reported, whereas no optical afterglow was found. Optical spectroscopic observations of the host galaxy revealed a redshift of z = 0.8. Using data derived by a HETE-2 observation of the prompt emission, we found absorption of NH = (8.8-29+3.1) x 1022cm -2 and visual extinction of Av = 49-16+17 mag in the host galaxy. If this is the case, no detection of any optical transient would be quite reasonable. The absorption derived by Swift XRT observations of the afterglow is fully consistent with those obtained from an early HETE-2 observation of the prompt emission. Our analysis implies an interpretation that the absorbing medium may be outside the external shock at R ∼ 10 16cm, which could be a dusty molecular cloud.

KW - Gamma rays: observations

KW - Star: individual (GRB 051022)

KW - X-rays: ISM

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U2 - 10.1093/pasj/58.4.L35

DO - 10.1093/pasj/58.4.L35

M3 - Article

AN - SCOPUS:33749320899

SN - 0004-6264

VL - 58

SP - L35-L39

JO - Publications of the Astronomical Society of Japan

JF - Publications of the Astronomical Society of Japan

IS - 4

ER -

An optically dark GRB observed by HETE-2: GRB 051022

Abstract

Keywords

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