تقرير
A Jet Break in the X-ray Light Curve of Short GRB 111020A: Implications for Energetics and Rates
| العنوان: | A Jet Break in the X-ray Light Curve of Short GRB 111020A: Implications for Energetics and Rates |
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| المؤلفون: | Fong, Wen-fai, Berger, Edo, Margutti, Raffaella, Zauderer, B. Ashley, Troja, Eleonora, Czekala, Ian, Chornock, Ryan, Gehrels, Neil, Sakamoto, Takanori, Fox, Derek B., Podsiadlowski, Philipp |
| سنة النشر: | 2012 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics - High Energy Astrophysical Phenomena |
| الوصف: | We present broad-band observations of the afterglow and environment of the short GRB 111020A. An extensive X-ray light curve from Swift/XRT, XMM-Newton and Chandra, spanning ~100 seconds to 10 days after the burst, reveals a significant break at t~2 days with pre- and post-break decline rates of alphaX,1 ~ -0.78 and alphaX,2<-1.7, respectively. Interpreted as a jet break, we infer a collimated outflow with an opening angle of ~3-8 degrees. The resulting beaming-corrected gamma-ray (10-1000 keV band) and blastwave kinetic energies are (2-3)e48 erg and (0.3-2)e49 erg, respectively, with the range depending on the unknown redshift of the burst. We report a radio afterglow limit of <39 microJy (3-sigma) from EVLA observations which, along with our finding that vc Comment: Submitted to ApJ; emulateapj style; 20 pages, 5 tables, 6 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1088/0004-637X/756/2/189 |
| URL الوصول: | http://arxiv.org/abs/1204.5475 |
| رقم الأكسشن: | edsarx.1204.5475 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1088/0004-637X/756/2/189 |
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