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arXiv 2108.11802astro-ph.HE
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用原型引力波光学瞬态观测器(GOTO)寻找费米GRB光学对应物

Searching For Fermi GRB Optical Counterparts With The Prototype Gravitational-Wave Optical Transient Observer (GOTO)

Y. -L. Mong, K. Ackley, D. K. Galloway, M. Dyer, R. Cutter, M. J. I. Brown, J. Lyman, K. Ulaczyk, D. Steeghs, V. Dhillon, P. OBrien, G. Ramsay, K. Noysena, R. K… 展开作者

Y. -L. Mong, K. Ackley, D. K. Galloway, M. Dyer, R. Cutter, M. J. I. Brown, J. Lyman, K. Ulaczyk, D. Steeghs, V. Dhillon, P. OBrien, G. Ramsay, K. Noysena, R. Kotak, R. Breton, L. Nuttall, E. Palle, D. Pollacco, E. Thrane, S. Awiphan, U. Burhanudin, P. Chote, A. Chrimes, E. Daw, C. Duffy, R. Eyles-Ferris, B. Gompertz, T. Heikkila, P. Irawati, M. Kennedy, T. Killestein, A. Levan, S. Littlefair, L. Makrygianni, T. Marsh, D. Mata-Sanchez, S. Mattila, J. Maund, J. McCormac, D. Mkrtichian, J. Mullaney, E. Rol, U. Sawangwit, E. Stanway, R. Starling, P. Strom, S. Tooke, K. Wiersema

摘要:

\emph{Fermi}伽马射线暴监测仪(GBM)每天对$\sim1$伽玛射线暴(GRB)的典型探测率为我们进一步了解GRB物理提供了宝贵的机会。然而,\emph{Fermi}定位的大的不确定性通常阻止多波长对应物的快速识别。本文报道了在La Palma上用引力波光学瞬变观测器(GOTO)样机对93个\emph{Fermi}伽玛暴进行的跟踪观测。我们选择了53个事件(基于有利的观测条件)进行详细的分析,并证明我们的战略,寻找光学同行。我们应用一个过滤过程,包括自动和手动步骤,以60\,085候选人最初,拒绝所有,但29,产生于15个事件。由于我们的样本中的$\approx3$ GRB余辉有望用GOTO探测到,因此大多数候选者不太可能与GRB有关。由于我们没有对这些候选者进行多次观测,我们无法确信瞬变和伽玛暴之间的联系。结果表明,GOTO系统具有$\approx40$平方度的大视场和$\approx20$的大深度,可以有效地探测到伽玛暴光学对应体,并为后续的\emph{Fermi}伽玛暴探测计划提供了改进方法。

英文摘要:

The typical detection rate of $\sim1$ gamma-ray burst (GRB) per day by the \emph{Fermi} Gamma-ray Burst Monitor (GBM) provides a valuable opportunity to further our understanding of GRB physics. However, the large uncertainty of the \emph{Fermi} localization typically prevents rapid identification of multi-wavelength counterparts. We report the follow-up of 93 \emph{Fermi} GRBs with the Gravitational-wave Optical Transient Observer (GOTO) prototype on La Palma. We selected 53 events (based on favourable observing conditions) for detailed analysis, and to demonstrate our strategy of searching for optical counterparts. We apply a filtering process consisting of both automated and manual steps to 60\,085 candidates initially, rejecting all but 29, arising from 15 events. With $\approx3$ GRB afterglows expected to be detectable with GOTO from our sample, most of the candidates are unlikely to be related to the GRBs. Since we did not have multiple observations for those candidates, we cannot confidently confirm the association between the transients and the GRBs. Our results show that GOTO can effectively search for GRB optical counterparts thanks to its large field of view of $\approx40$ square degrees and its depth of $\approx20$ mag. We also detail several methods to improve our overall performance for future follow-up programs of \emph{Fermi} GRBs.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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