Suzaku observation of X-ray afterglow: Spectral and temporal behaviors

D. Yonetoku; T. Murakami; H. Kodaira; S. Okuno; S. Yoshinari; K. Abe; L. Angelini; S. Barthelmy; N. Gehrels; N. Ishikawa; L. J. Kaluzienski; N. Kawai; R. L. Kelley; K. Kinugasa; T. Kohmura; K. Kubota; Y. Maeda; S. Maeno; H. Murakami; Y. E. Nakagawa; K. Nakazawa; J. Nousek; K. Onda; J. N. Reeves; G. Ricker; G. Sato; E. Sonoda; M. Suzuki; T. Takahashi; T. Tamagawa; M. S. Tashiro; K. Torii; Y. Ueda; Y. Urata; K. Yamaoka; M. Yamauchi; A. Yoshida

doi:10.1393/ncb/i2007-10243-8

Suzaku observation of X-ray afterglow: Spectral and temporal behaviors

D. Yonetoku, T. Murakami, H. Kodaira, S. Okuno, S. Yoshinari, K. Abe, L. Angelini, S. Barthelmy, N. Gehrels, N. Ishikawa, L. J. Kaluzienski, N. Kawai, R. L. Kelley, K. Kinugasa, T. Kohmura, K. Kubota, Y. Maeda, S. Maeno, H. Murakami, Y. E. NakagawaK. Nakazawa, J. Nousek, K. Onda, J. N. Reeves, G. Ricker, G. Sato, E. Sonoda, M. Suzuki, T. Takahashi, T. Tamagawa, M. S. Tashiro, K. Torii, Y. Ueda, Y. Urata, K. Yamaoka, M. Yamauchi, A. Yoshida

Astronomy & Astrophysics

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Abstract

We report about early X-ray afterglow observations of GRB 060105 by Swift and Suzaku. The Suzaku team commenced a pre-planned target of opportunity observation at 5.3 h after the Swift trigger. Following the prompt emission and successive very steep decay, a shallow decay was observed from T₀ + 187 s to T₀ + 1287s by Swift. After that, an extremely early steep decay was observed in T₀ + (4 30) ks. The light curve flattened again and another steep decay from T₀ + 50 ks to the end of Suzaku observations was observed. Both steep decays exhibited almost same decay indices of 2.3-2.4. This break time, if it is caused by a jet break, is the earliest case among X-ray afterglow observations, suggesting a very narrow jet opening angle is about 0.7 degree. The unique Suzaku/XIS data allow us to set very tight upper limits on emission line in this GRB. Using the reported pseudo-redshift of z = 4.0 ± 1.3. we set the upper limit on the equivalent width of iron emission line at a few eV.

Original language	English (US)
Pages (from-to)	1253-1256
Number of pages	4
Journal	Nuovo Cimento della Societa Italiana di Fisica B
Volume	121
Issue number	10-11
DOIs	https://doi.org/10.1393/ncb/i2007-10243-8
State	Published - Oct 2006

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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10.1393/ncb/i2007-10243-8

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Yonetoku, D., Murakami, T., Kodaira, H., Okuno, S., Yoshinari, S., Abe, K., Angelini, L., Barthelmy, S., Gehrels, N., Ishikawa, N., Kaluzienski, L. J., Kawai, N., Kelley, R. L., Kinugasa, K., Kohmura, T., Kubota, K., Maeda, Y., Maeno, S., Murakami, H., ... Yoshida, A. (2006). Suzaku observation of X-ray afterglow: Spectral and temporal behaviors. Nuovo Cimento della Societa Italiana di Fisica B, 121(10-11), 1253-1256. https://doi.org/10.1393/ncb/i2007-10243-8

@article{df972946e26441e79b252a5811463455,

title = "Suzaku observation of X-ray afterglow: Spectral and temporal behaviors",

abstract = "We report about early X-ray afterglow observations of GRB 060105 by Swift and Suzaku. The Suzaku team commenced a pre-planned target of opportunity observation at 5.3 h after the Swift trigger. Following the prompt emission and successive very steep decay, a shallow decay was observed from T0 + 187 s to T0 + 1287s by Swift. After that, an extremely early steep decay was observed in T0 + (4 30) ks. The light curve flattened again and another steep decay from T0 + 50 ks to the end of Suzaku observations was observed. Both steep decays exhibited almost same decay indices of 2.3-2.4. This break time, if it is caused by a jet break, is the earliest case among X-ray afterglow observations, suggesting a very narrow jet opening angle is about 0.7 degree. The unique Suzaku/XIS data allow us to set very tight upper limits on emission line in this GRB. Using the reported pseudo-redshift of z = 4.0 ± 1.3. we set the upper limit on the equivalent width of iron emission line at a few eV.",

author = "D. Yonetoku and T. Murakami and H. Kodaira and S. Okuno and S. Yoshinari and K. Abe and L. Angelini and S. Barthelmy and N. Gehrels and N. Ishikawa and Kaluzienski, {L. J.} and N. Kawai and Kelley, {R. L.} and K. Kinugasa and T. Kohmura and K. Kubota and Y. Maeda and S. Maeno and H. Murakami and Nakagawa, {Y. E.} and K. Nakazawa and J. Nousek and K. Onda and Reeves, {J. N.} and G. Ricker and G. Sato and E. Sonoda and M. Suzuki and T. Takahashi and T. Tamagawa and Tashiro, {M. S.} and K. Torii and Y. Ueda and Y. Urata and K. Yamaoka and M. Yamauchi and A. Yoshida",

year = "2006",

month = oct,

doi = "10.1393/ncb/i2007-10243-8",

language = "English (US)",

volume = "121",

pages = "1253--1256",

journal = "Nuovo Cimento della Societa Italiana di Fisica B",

issn = "1594-9982",

publisher = "Editrice Compositori s.r.l.",

number = "10-11",

}

Yonetoku, D, Murakami, T, Kodaira, H, Okuno, S, Yoshinari, S, Abe, K, Angelini, L, Barthelmy, S, Gehrels, N, Ishikawa, N, Kaluzienski, LJ, Kawai, N, Kelley, RL, Kinugasa, K, Kohmura, T, Kubota, K, Maeda, Y, Maeno, S, Murakami, H, Nakagawa, YE, Nakazawa, K, Nousek, J, Onda, K, Reeves, JN, Ricker, G, Sato, G, Sonoda, E, Suzuki, M, Takahashi, T, Tamagawa, T, Tashiro, MS, Torii, K, Ueda, Y, Urata, Y, Yamaoka, K, Yamauchi, M & Yoshida, A 2006, 'Suzaku observation of X-ray afterglow: Spectral and temporal behaviors', Nuovo Cimento della Societa Italiana di Fisica B, vol. 121, no. 10-11, pp. 1253-1256. https://doi.org/10.1393/ncb/i2007-10243-8

TY - JOUR

T1 - Suzaku observation of X-ray afterglow

T2 - Spectral and temporal behaviors

AU - Yonetoku, D.

AU - Murakami, T.

AU - Kodaira, H.

AU - Okuno, S.

AU - Yoshinari, S.

AU - Abe, K.

AU - Angelini, L.

AU - Barthelmy, S.

AU - Gehrels, N.

AU - Ishikawa, N.

AU - Kaluzienski, L. J.

AU - Kawai, N.

AU - Kelley, R. L.

AU - Kinugasa, K.

AU - Kohmura, T.

AU - Kubota, K.

AU - Maeda, Y.

AU - Maeno, S.

AU - Murakami, H.

AU - Nakagawa, Y. E.

AU - Nakazawa, K.

AU - Nousek, J.

AU - Onda, K.

AU - Reeves, J. N.

AU - Ricker, G.

AU - Sato, G.

AU - Sonoda, E.

AU - Suzuki, M.

AU - Takahashi, T.

AU - Tamagawa, T.

AU - Tashiro, M. S.

AU - Torii, K.

AU - Ueda, Y.

AU - Urata, Y.

AU - Yamaoka, K.

AU - Yamauchi, M.

AU - Yoshida, A.

PY - 2006/10

Y1 - 2006/10

N2 - We report about early X-ray afterglow observations of GRB 060105 by Swift and Suzaku. The Suzaku team commenced a pre-planned target of opportunity observation at 5.3 h after the Swift trigger. Following the prompt emission and successive very steep decay, a shallow decay was observed from T0 + 187 s to T0 + 1287s by Swift. After that, an extremely early steep decay was observed in T0 + (4 30) ks. The light curve flattened again and another steep decay from T0 + 50 ks to the end of Suzaku observations was observed. Both steep decays exhibited almost same decay indices of 2.3-2.4. This break time, if it is caused by a jet break, is the earliest case among X-ray afterglow observations, suggesting a very narrow jet opening angle is about 0.7 degree. The unique Suzaku/XIS data allow us to set very tight upper limits on emission line in this GRB. Using the reported pseudo-redshift of z = 4.0 ± 1.3. we set the upper limit on the equivalent width of iron emission line at a few eV.

AB - We report about early X-ray afterglow observations of GRB 060105 by Swift and Suzaku. The Suzaku team commenced a pre-planned target of opportunity observation at 5.3 h after the Swift trigger. Following the prompt emission and successive very steep decay, a shallow decay was observed from T0 + 187 s to T0 + 1287s by Swift. After that, an extremely early steep decay was observed in T0 + (4 30) ks. The light curve flattened again and another steep decay from T0 + 50 ks to the end of Suzaku observations was observed. Both steep decays exhibited almost same decay indices of 2.3-2.4. This break time, if it is caused by a jet break, is the earliest case among X-ray afterglow observations, suggesting a very narrow jet opening angle is about 0.7 degree. The unique Suzaku/XIS data allow us to set very tight upper limits on emission line in this GRB. Using the reported pseudo-redshift of z = 4.0 ± 1.3. we set the upper limit on the equivalent width of iron emission line at a few eV.

UR - http://www.scopus.com/inward/record.url?scp=34548241298&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=34548241298&partnerID=8YFLogxK

U2 - 10.1393/ncb/i2007-10243-8

DO - 10.1393/ncb/i2007-10243-8

M3 - Article

AN - SCOPUS:34548241298

SN - 1594-9982

VL - 121

SP - 1253

EP - 1256

JO - Nuovo Cimento della Societa Italiana di Fisica B

JF - Nuovo Cimento della Societa Italiana di Fisica B

IS - 10-11

ER -

Suzaku observation of X-ray afterglow: Spectral and temporal behaviors

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