Constraining the X-Ray–Infrared Spectral Index of Second-timescale Flares from SGR 1935+2154?with Palomar Gattini-IR
文献类型：期刊论文
| 作者 | De,Kishalay2; Ashley,Michael C. B.3; Andreoni,Igor2; Kasliwal,Mansi M.2; Soria,Roberto4,5; Srinivasaragavan,Gokul P.2; Cai,Ce6,7; Delacroix,Alexander8; Greffe,Tim8; Hale,David8 |
| 刊名 | The Astrophysical Journal Letters
 |
| 出版日期 | 2020-09-01 |
| 卷号 | 901期号:1 |
| ISSN号 | 2041-8205 |
| 关键词 | Radio transient sources Magnetars Soft gamma-ray repeaters |
| DOI | 10.3847/2041-8213/abb3c5 |
| 英文摘要 | Abstract The Galactic magnetar SGR 1935+2154 has been reported to produce the first example of a bright millisecond-duration radio burst (FRB 200428) similar to the cosmological population of fast radio bursts (FRBs). The detection of a coincident bright X-ray burst represents the first observed multiwavelength counterpart of an FRB. However, the search for similar emission at optical wavelengths has been hampered by the high inferred extinction on the line of sight. Here, we present results from the first search for second-timescale emission from the source at near-infrared (NIR) wavelengths using the Palomar Gattini-IR observing system in the J band, enabled by a novel detector readout mode that allows short exposure times of ≈0.84 s with 99.9% observing efficiency. With a total observing time of ≈12 hr (≈47,728 images) during its 2020 outburst, we place median 3σ limits on the second-timescale NIR fluence of ?18?Jy ms (13.1 AB mag). The corresponding extinction-corrected limit is ?125?Jy ms for an estimated extinction of AJ?=?2.0 mag. Our observations were sensitive enough to easily detect an NIR counterpart of FRB 200428 if the NIR emission falls on the same power law as observed across its radio to X-ray spectrum. We report nondetection limits from epochs of four simultaneous X-ray bursts detected by the Insight-HXMT and NuSTAR telescopes during our observations. These limits provide the most stringent constraints to date on fluence of flares at ～1014 Hz, and constrain the fluence ratio of the NIR emission to coincident X-ray bursts to RNIR???0.025 (fluence index ?0.35). |
| 语种 | 英语 |
| 出版者 | The American Astronomical Society |
| WOS记录号 | IOP:2041-8205-901-1-ABB3C5 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/62836]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | De,Kishalay |
| 作者单位 | 1.Department of Particle Physics & Astrophysics, Weizmann Institute of Science, Rehovot 76100, Israel 2.Cahill Center for Astrophysics, California Institute of Technology, 1200 E. California Boulevard, Pasadena, CA 91125, USA; kde@astro.caltech.edu 3.School of Physics, University of New South Wales, Sydney, NSW 2052, Australia 4.National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, People’s Republic of China 5.Sydney Institute for Astronomy, The University of Sydney, Sydney, NSW 2006, Australia 6.Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, 19B Yuquan Road, Beijing 100049, People’s Republic of China 7.University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100049, People’s Republic of China 8.Caltech Optical Observatories, California Institute of Technology, Pasadena, CA 91125, USA 9.Research School of Astronomy and Astrophysics, Australian National University, Canberra, ACT 2611, Australia |
| 推荐引用方式 GB/T 7714 | De,Kishalay,Ashley,Michael C. B.,Andreoni,Igor,et al. Constraining the X-Ray–Infrared Spectral Index of Second-timescale Flares from SGR 1935+2154?with Palomar Gattini-IR[J]. The Astrophysical Journal Letters,2020,901(1). |
| APA | De,Kishalay.,Ashley,Michael C. B..,Andreoni,Igor.,Kasliwal,Mansi M..,Soria,Roberto.,...&Zhang,Shuangnan.(2020).Constraining the X-Ray–Infrared Spectral Index of Second-timescale Flares from SGR 1935+2154?with Palomar Gattini-IR.The Astrophysical Journal Letters,901(1). |
| MLA | De,Kishalay,et al."Constraining the X-Ray–Infrared Spectral Index of Second-timescale Flares from SGR 1935+2154?with Palomar Gattini-IR".The Astrophysical Journal Letters 901.1(2020). |
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来源：国家天文台
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