Abstract
Ultra-long gamma-ray bursts are a class of high-energy transients lasting several hours. Their exact nature is still elusive, and severalmodels have been proposed to explain them. Because of the limited coverage of wide-field gamma-ray detectors, the study of their prompt phase with sensitive narrow-field X-ray instruments could help in understanding the origin of ultra-long GRBs.However, the observers face a true problem in rapidly activating follow-up observations, due to the challenging identification of an ultra-long GRB before the end of the prompt phase. We present here a comparison of the prompt properties available after a few tens of minutes of a sample of ultra-long GRBs and normal long GRBs, looking for prior indicators of the long duration.We find that there is no such clear prior indicator of the duration of the burst.We also found that statistically, a burst lasting at least 10 and 20 minutes has respectively 28 per cent and 50 per cent probability to be an ultralong event. These findings point towards a common central engine for normal long and ultra-long GRBs, with the collapsar model privileged.
| Original language | English |
|---|---|
| Pages (from-to) | 2471-2476 |
| Number of pages | 6 |
| Journal | Monthly Notices of the Royal Astronomical Society |
| Volume | 486 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 1 Jun 2019 |
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Can we quickly flag ultra-long gamma-ray bursts. / Gendre, B.; Joyce, Q. T.; Orange, N. B.; Stratta, G.; Atteia, J. L.; Boer, M.
In: Monthly Notices of the Royal Astronomical Society, Vol. 486, No. 2, 01.06.2019, p. 2471-2476.Research output: Contribution to journal › Article
TY - JOUR
T1 - Can we quickly flag ultra-long gamma-ray bursts
AU - Gendre, B.
AU - Joyce, Q. T.
AU - Orange, N. B.
AU - Stratta, G.
AU - Atteia, J. L.
AU - Boer, M.
PY - 2019/6/1
Y1 - 2019/6/1
N2 - Ultra-long gamma-ray bursts are a class of high-energy transients lasting several hours. Their exact nature is still elusive, and severalmodels have been proposed to explain them. Because of the limited coverage of wide-field gamma-ray detectors, the study of their prompt phase with sensitive narrow-field X-ray instruments could help in understanding the origin of ultra-long GRBs.However, the observers face a true problem in rapidly activating follow-up observations, due to the challenging identification of an ultra-long GRB before the end of the prompt phase. We present here a comparison of the prompt properties available after a few tens of minutes of a sample of ultra-long GRBs and normal long GRBs, looking for prior indicators of the long duration.We find that there is no such clear prior indicator of the duration of the burst.We also found that statistically, a burst lasting at least 10 and 20 minutes has respectively 28 per cent and 50 per cent probability to be an ultralong event. These findings point towards a common central engine for normal long and ultra-long GRBs, with the collapsar model privileged.
AB - Ultra-long gamma-ray bursts are a class of high-energy transients lasting several hours. Their exact nature is still elusive, and severalmodels have been proposed to explain them. Because of the limited coverage of wide-field gamma-ray detectors, the study of their prompt phase with sensitive narrow-field X-ray instruments could help in understanding the origin of ultra-long GRBs.However, the observers face a true problem in rapidly activating follow-up observations, due to the challenging identification of an ultra-long GRB before the end of the prompt phase. We present here a comparison of the prompt properties available after a few tens of minutes of a sample of ultra-long GRBs and normal long GRBs, looking for prior indicators of the long duration.We find that there is no such clear prior indicator of the duration of the burst.We also found that statistically, a burst lasting at least 10 and 20 minutes has respectively 28 per cent and 50 per cent probability to be an ultralong event. These findings point towards a common central engine for normal long and ultra-long GRBs, with the collapsar model privileged.
KW - gamma-ray burst: general.
KW - methods: observational
UR - http://www.scopus.com/inward/record.url?scp=85068002955&partnerID=8YFLogxK
U2 - 10.1093/mnras/stz1036
DO - 10.1093/mnras/stz1036
M3 - Article
VL - 486
SP - 2471
EP - 2476
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
SN - 0035-8711
IS - 2
ER -