Academic Journal
GRB 091024 and the nature of ultra-long gamma-ray bursts
| العنوان: | GRB 091024 and the nature of ultra-long gamma-ray bursts |
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| المؤلفون: | F. J. Virgili, C. G. Mundell, V. Pal’shin, R. Margutti, A. Melandri, R. Harrison, S. Kobayashi, R. Chornock, A. Henden, A. C. Updike, S. B. Cenko, N. R. Tanvir, I. A. Steele, A. Cucchiara, A. Gomboc, A. Levan, Z. Cano, C. J. Mottram, N. R. Clay, D. F. Bersier, D. Kopac, J. Japelj, A. V. Filippenko, W. Li, D. Svinkin, S. Golenetskii, D. H. Hartmann, P. A. Milne, G. Williams, P. T. O’Brien, D. B. Fox, E. Berger, GUIDORZI, Cristiano |
| المساهمون: | F. J., Virgili, C. G., Mundell, V., Pal’Shin, Guidorzi, Cristiano, R., Margutti, A., Melandri, R., Harrison, S., Kobayashi, R., Chornock, A., Henden, A. C., Updike, S. B., Cenko, N. R., Tanvir, I. A., Steele, A., Cucchiara, A., Gomboc, A., Levan, Z., Cano, C. J., Mottram, N. R., Clay, D. F., Bersier, D., Kopac, J., Japelj, A. V., Filippenko, W., Li, D., Svinkin, S., Golenetskii, D. H., Hartmann, P. A., Milne, G., William, P. T., O’Brien, D. B., Fox, E., Berger |
| سنة النشر: | 2013 |
| المجموعة: | Università degli Studi di Ferrara: CINECA IRIS |
| مصطلحات موضوعية: | gamma-ray burst: general, gamma-ray burst: individual GRB 091024A |
| الوصف: | We present a broadband study of gamma-ray burst (GRB) 091024A within the context of other ultra-long-duration GRBs. An unusually long burst detected by Konus-Wind (KW), Swift, and Fermi, GRB 091024A has prompt emission episodes covering ~1300 s, accompanied by bright and highly structured optical emission captured by various rapid-response facilities, including the 2 m autonomous robotic Faulkes North and Liverpool Telescopes, KAIT, S-LOTIS, and the Sonoita Research Observatory. We also observed the burst with 8 and 10 m class telescopes and determine the redshift to be z = 1.0924 ± 0.0004. We find no correlation between the optical and gamma-ray peaks and interpret the optical light curve as being of external origin, caused by the reverse and forward shock of a highly magnetized jet (R_B ≈ 100-200). Low-level emission is detected throughout the near-background quiescent period between the first two emission episodes of the KW data, suggesting continued central-engine activity; we discuss the implications of this ongoing emission and its impact on the afterglow evolution and predictions. We summarize the varied sample of historical GRBs with exceptionally long durations in gamma-rays (gsim1000 s) and discuss the likelihood of these events being from a separate population; we suggest ultra-long GRBs represent the tail of the duration distribution of the long GRB population. |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | ELETTRONICO |
| اللغة: | English |
| Relation: | info:eu-repo/semantics/altIdentifier/wos/WOS:000327131700054; volume:778; firstpage:54; lastpage:71; numberofpages:18; journal:THE ASTROPHYSICAL JOURNAL; http://hdl.handle.net/11392/1812104; info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84887521776; http://iopscience.iop.org/0004-637X/778/1/54/ |
| DOI: | 10.1088/0004-637X/778/1/54 |
| الاتاحة: | http://hdl.handle.net/11392/1812104 https://doi.org/10.1088/0004-637X/778/1/54 http://iopscience.iop.org/0004-637X/778/1/54/ |
| رقم الانضمام: | edsbas.F170C2CA |
| قاعدة البيانات: | BASE |
| DOI: | 10.1088/0004-637X/778/1/54 |
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