Early-time optical spectral shape measurements of GRB 200925B
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arXiv
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| Format: | Preprint |
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2024
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| author | Abdullayev, Zhavlonbek Komesh, Toktarkhan Grossan, Bruce Abdikamalov, Ernazar Maksut, Zhanat Krugov, Maxim Myrzakul, Shynaray Tuiakbayeva, Duriya |
| author_facet | Abdullayev, Zhavlonbek Komesh, Toktarkhan Grossan, Bruce Abdikamalov, Ernazar Maksut, Zhanat Krugov, Maxim Myrzakul, Shynaray Tuiakbayeva, Duriya |
| contents | Optical broad-band spectral shape measurements of gamma-ray bursts (GRBs) are typically made starting an hour or more after the trigger event. With our automated, rapid-response system, the Burst Simultaneous Three-channel Imager (BSTI) on the Nazarbayev University Transient Telescope at Assy-Turgen Astrophysical Observatory (NUTTelA-TAO), we began measurements of GRB200925B 129 s after the Swift BAT trigger. The temporal decay log slopes in the g', r', and i' bands in the time interval 129 s to 1029 s are -0.43 \pm 0.31, -0.43 \pm 0.15, and -0.72 \pm 0.14, respectively. During the decay phase, a shift in color from red to blue, a change in log slope of \{beta} from -2.73 to -1.52 was measured. The evolution in the optical spectral slope is consistent with a decrease in extinction caused by dust destruction. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2401_09805 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Early-time optical spectral shape measurements of GRB 200925B Abdullayev, Zhavlonbek Komesh, Toktarkhan Grossan, Bruce Abdikamalov, Ernazar Maksut, Zhanat Krugov, Maxim Myrzakul, Shynaray Tuiakbayeva, Duriya High Energy Astrophysical Phenomena Optical broad-band spectral shape measurements of gamma-ray bursts (GRBs) are typically made starting an hour or more after the trigger event. With our automated, rapid-response system, the Burst Simultaneous Three-channel Imager (BSTI) on the Nazarbayev University Transient Telescope at Assy-Turgen Astrophysical Observatory (NUTTelA-TAO), we began measurements of GRB200925B 129 s after the Swift BAT trigger. The temporal decay log slopes in the g', r', and i' bands in the time interval 129 s to 1029 s are -0.43 \pm 0.31, -0.43 \pm 0.15, and -0.72 \pm 0.14, respectively. During the decay phase, a shift in color from red to blue, a change in log slope of \{beta} from -2.73 to -1.52 was measured. The evolution in the optical spectral slope is consistent with a decrease in extinction caused by dust destruction. |
| title | Early-time optical spectral shape measurements of GRB 200925B |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2401.09805 |