January 2025 - vsnet-grb-info - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-grb-info 36827] GRB 250101A NUTTelA-TAO / BSTI Early Measurements
by GCN Circulars 05 Jan '25

05 Jan '25

TITLE: GCN CIRCULAR NUMBER: 38777 SUBJECT: GRB 250101A NUTTelA-TAO / BSTI Early Measurements DATE: 25/01/02 12:04:47 GMT FROM: Toktarkhan Komesh at Nazarbayev University <toktarkhan.komesh(a)nu.edu.kz> T. Komesh (NU), Z. Abdullayev (NU), Z. Maksut (NU), B. Grossan (UCB, NU), D. Berdikhan (NU), M. Krugov (FAI) and E. Abdikamalov (NU) report on behalf of the Energetic Cosmos Laboratory: The Nazarbayev University Transient Telescope at Assy-Turgen Astrophysical Observatory (… [View More]NUTTelA-TAO) pointed at GRB 250101A on receipt of an automated GCN / BAT position alert, observing in Sloan g' and r' bands, with the Burst Simultaneous Three-Channel Imager (BSTI; Grossan, Kumar & Smoot 2019, JHEA, 32, 14). We started observations at 13:24:00 UT on 2025-01-01, 70 s after the BAT trigger. Observations were made in partly cloudy conditions. A new and changing source consistent with the XRT position (M.R. Goad et al., GCN 38761) was detected. Note that these observations provide essentially full-time coverage, simultaneous in two bands. We report the following photometric values for the optical transient: tc-t0(s) g'(mag) err r'(mag) err exposure_time (s) -------------------------------------------------------------- 100 18.66 0.07 18.20 0.07 57 166 17.64 0.12 17.24 0.12 15 181 17.51 0.10 16.98 0.14 15 196 17.11 0.09 16.87 0.12 15 211 17.34 0.13 16.90 0.09 15 226 17.37 0.12 16.77 0.12 15 241 17.31 0.09 16.65 0.06 15 256 17.30 0.11 16.79 0.06 15 271 17.43 0.09 16.85 0.10 15 286 17.37 0.11 16.89 0.08 15 301 17.50 0.16 17.02 0.08 15 316 17.68 0.20 17.01 0.08 15 331 17.52 0.15 17.01 0.10 15 346 17.67 0.11 17.08 0.09 15 361 17.60 0.11 17.13 0.09 15 376 17.62 0.15 16.95 0.13 15 391 17.96 0.14 16.91 0.08 15 406 17.61 0.15 17.39 0.13 15 421 17.81 0.13 17.23 0.12 15 436 17.46 0.13 17.41 0.12 15 451 18.10 0.15 17.41 0.11 15 466 17.78 0.17 17.30 0.11 15 481 17.81 0.13 17.29 0.10 15 496 17.70 0.15 17.36 0.15 15 511 17.92 0.13 17.45 0.11 15 526 17.68 0.12 17.46 0.12 15 541 18.30 0.19 17.53 0.13 15 556 17.86 0.18 17.34 0.13 15 571 17.96 0.14 17.31 0.14 15 586 17.66 0.16 17.43 0.11 15 601 18.16 0.17 17.82 0.14 15 616 17.90 0.15 17.72 0.16 15 631 17.85 0.13 17.23 0.11 15 653 18.12 0.12 17.58 0.10 30 683 18.06 0.10 17.47 0.07 30 713 18.05 0.10 17.54 0.09 30 743 18.01 0.10 17.46 0.08 30 864 18.20 0.05 17.54 0.04 60 924 18.17 0.07 17.67 0.06 60 984 18.21 0.06 17.67 0.04 60 1044 18.26 0.06 17.77 0.04 60 1104 18.37 0.07 17.81 0.05 60 1164 18.33 0.06 17.81 0.05 60 1224 18.46 0.07 17.82 0.05 60 1284 18.48 0.07 17.91 0.05 60 1344 18.56 0.07 17.84 0.05 60 1404 18.43 0.06 18.04 0.05 60 1464 18.43 0.07 18.15 0.06 60 1524 18.63 0.07 18.12 0.06 60 1584 18.66 0.08 18.19 0.07 60 1644 18.73 0.08 18.26 0.07 60 1704 18.70 0.08 18.18 0.06 60 1764 18.66 0.08 18.23 0.06 60 1824 18.81 0.08 18.38 0.08 60 1884 18.82 0.08 18.39 0.07 60 1944 19.01 0.10 18.27 0.07 60 2004 18.83 0.10 18.43 0.08 60 2064 18.87 0.09 18.33 0.07 60 2124 18.75 0.08 18.34 0.07 60 2184 18.99 0.10 18.46 0.08 60 2244 18.97 0.10 18.49 0.08 60 2304 18.90 0.09 18.48 0.09 60 2364 19.21 0.12 18.45 0.08 60 2424 19.01 0.10 18.43 0.07 60 2484 18.95 0.10 18.64 0.09 60 2544 19.10 0.10 18.64 0.09 60 2604 18.98 0.10 18.77 0.10 60 2664 19.12 0.11 18.76 0.10 60 2724 18.93 0.10 18.78 0.10 60 2784 19.23 0.12 18.85 0.11 60 2844 19.18 0.12 18.78 0.11 60 2904 19.43 0.15 18.59 0.09 60 2964 19.15 0.12 18.92 0.12 60 3024 19.23 0.13 18.72 0.11 60 3084 19.19 0.13 18.65 0.11 60 3144 19.30 0.15 18.87 0.13 60 3204 19.18 0.13 19.07 0.16 60 3294 19.42 0.13 18.86 0.10 120 3414 19.38 0.13 18.70 0.09 120 3534 19.41 0.08 19.05 0.14 120 3654 19.38 0.15 18.96 0.14 120 3774 19.37 0.17 19.00 0.16 120 4166 19.65 0.11 18.89 0.08 360 4526 19.82 0.19 19.17 0.13 360 tc-t0 = trigger time minus image center time. Calibration was done with 5 bright Pan-STARRS catalog stars on our images. A light curve of the optical transient is presented in Figure 1: https://ecl.nu.edu.kz/research/observations/gamma-ray-bursts/grb250101a Our results are in agreement with those reported in previously published circulars (Li et al., GCN 38753; Mohan et al., GCN 38754; Wu et al., GCN 38758; Escudero-Coca et al., GCN 38769; Zhang et al., 38744). We caution the reader that these are preliminary results, without color or other corrections, and will likely change in small measure. Please also note that times are approximate. ---------------------------------- NU = Nazarbayev University, Astana, Kazakhstan UCB = University of California, Berkeley, USA FAI = Fesenkov Astrophysical Institute, Kazakhstan This research has been funded by the Science Committee of the Ministry of Science and Higher Education of the Republic of Kazakhstan (Grant No. AP26103591). The NUTTelA-TAO Team acknowledges the support of the staff of the Assy-Turgen Astrophysical Observatory, Almaty, Kazakhstan, and the Fesenkov Astrophysical Institute, Almaty, Kazkhstan. View this GCN Circular online at https://gcn.nasa.gov/circulars/38777. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L… [View Less]

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[vsnet-grb-info 36826] GRB 250103B: Swift-XRT refined Analysis
by GCN Circulars 04 Jan '25

04 Jan '25

TITLE: GCN CIRCULAR NUMBER: 38823 SUBJECT: GRB 250103B: Swift-XRT refined Analysis DATE: 25/01/04 18:05:05 GMT FROM: Phil Evans at U of Leicester <pae9(a)star.le.ac.uk> J.P. Osborne (U. Leicester), T. Sbarrato (INAF-OAB), P. D'Avanzo (INAF-OAB), M.G. Bernardini (INAF-OAB), D.N. Burrows (PSU), M. A. Williams (PSU), S. Dichiara (PSU), K.L. Page (U. Leicester) and P.A. Evans report on behalf of the Swift-XRT team: We have analysed 3.5 ks of XRT data for GRB 250103B, from 144 s to … [View More]

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[vsnet-grb-info 36825] GRB 250103B: LCO/1m optical afterglow candidate detection
by GCN Circulars 04 Jan '25

04 Jan '25

TITLE: GCN CIRCULAR NUMBER: 38822 SUBJECT: GRB 250103B: LCO/1m optical afterglow candidate detection DATE: 25/01/04 15:54:30 GMT FROM: Damien Turpin at CEA-Saclay <dturpin-astro(a)hotmail.com> D. Turpin (CEA/Irfu), A. Saccardi (GEPI/Obs. de Paris, CEA/Irfu), S. Basa (UAR Pytheas, OHP, LAM), D. B. Malesani (DAWN/NBI and Radboud Univ.), J. T. Palmerio (CEA/Irfu, GEPI/Obs. de Paris), S. Vergani (GEPI/Obs. de Paris), E. Le Floc'h (CEA Paris-Saclay, DAp/AIM) on behalf of a larger … [View More]

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[vsnet-grb-info 36824] GRB 250103B: LCO/1m optical afterglow candidate detection
by GCN Circulars 04 Jan '25

04 Jan '25

TITLE: GCN CIRCULAR NUMBER: 38822 SUBJECT: GRB 250103B: LCO/1m optical afterglow candidate detection DATE: 25/01/04 15:54:30 GMT FROM: Damien Turpin at CEA-Saclay <dturpin-astro(a)hotmail.com> D. Turpin (CEA/Irfu), A. Saccardi (GEPI/Obs. de Paris, CEA/Irfu), S. Basa (UAR Pytheas, OHP, LAM), D. B. Malesani (DAWN/NBI and Radboud Univ.), J. T. Palmerio (CEA/Irfu, GEPI/Obs. de Paris), S. Vergani (GEPI/Obs. de Paris), E. Le Floc'h (CEA Paris-Saclay, DAp/AIM) on behalf of a larger … [View More]

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[vsnet-grb-info 36823] GRB 250103A: Bassano Bresciano Observatory upper limit
by GCN Circulars 04 Jan '25

04 Jan '25

TITLE: GCN CIRCULAR NUMBER: 38821 SUBJECT: GRB 250103A: Bassano Bresciano Observatory upper limit DATE: 25/01/04 13:43:22 GMT FROM: Ulisse Quadri at Bassano Bresciano Observatory <osservatoriobassano(a)gmail.com> U.Quadri, L.Strabla and P.Madurini (Bassano Bresciano Astronomical Observatory) Members of: GRB/UAI - Gamma ray Burst section of Unione Astrofili Italiani. AAVSO - American Association of Variable Star Observers. GAC - Gruppo Astrofili Cremonesi. In a large … [View More]

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[vsnet-grb-info 36822] GRB 250103B: VLT/X-shooter spectroscopic redshift z = 1.416
by GCN Circulars 04 Jan '25

04 Jan '25

TITLE: GCN CIRCULAR NUMBER: 38820 SUBJECT: GRB 250103B: VLT/X-shooter spectroscopic redshift z = 1.416 DATE: 25/01/04 10:20:17 GMT FROM: Andrea Saccardi at CEA/Irfu <andrea.saccardi(a)cea.fr> N. Habeeb (Leicester), A. Saccardi (CEA/Irfu), L. Izzo (INAF/OACn and DARK/NBI), B. Schneider (LAM), D. B. Malesani (DAWN/NBI and Radboud Univ.), G. Pugliese (UvA), A. L. Thakur (INAF-IAPS), A. de Ugarte Postigo (CNRS, OCA and LAM), Z.P. Zhu, J. An, D. Xu (NAOC) report on behalf of the … [View More]

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[vsnet-grb-info 36821] GRB 250103A: Swift-XRT observations
by GCN Circulars 04 Jan '25

04 Jan '25

TITLE: GCN CIRCULAR NUMBER: 38819 SUBJECT: GRB 250103A: Swift-XRT observations DATE: 25/01/04 09:24:43 GMT FROM: Phil Evans at U of Leicester <pae9(a)star.le.ac.uk> A.P. Beardmore (U. Leicester), J.P. Osborne (U. Leicester), A. Melandri (INAF-OAR), T. Sbarrato (INAF-OAB), P. D'Avanzo (INAF-OAB), J.A. Kennea (PSU), D.N. Burrows (PSU), M. A. Williams (PSU) and P.A. Evans (U. Leicester) reports on behalf of the Swift-XRT team: Swift-XRT has performed follow-up observations of the … [View More]

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[vsnet-grb-info 36820] GRB 250101A: 1.3m DFOT optical afterglow detection
by GCN Circulars 04 Jan '25

04 Jan '25

TITLE: GCN CIRCULAR NUMBER: 38818 SUBJECT: GRB 250101A: 1.3m DFOT optical afterglow detection DATE: 25/01/04 06:50:02 GMT FROM: ANSHIKA GUPTA at ARIES <anshika05180(a)gmail.com> Anshika Gupta, Amit K. Ror, Mamta, Kuntal Misra, and Shashi B. Pandey (ARIES) report: We observed the field of GRB 250101A detected by Swift-BAT (GCN 38752) with the 1.3m Devasthal Fast Optical Telescope (DFOT), located at the Devasthal Observatory of the Aryabhatta Research Institute of Observational … [View More]

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[vsnet-grb-info 36819] GRB 241229A: 1.3m DFOT upper limit
by GCN Circulars 04 Jan '25

04 Jan '25

TITLE: GCN CIRCULAR NUMBER: 38817 SUBJECT: GRB 241229A: 1.3m DFOT upper limit DATE: 25/01/04 05:51:44 GMT FROM: ANSHIKA GUPTA at ARIES <anshika05180(a)gmail.com> Anshika Gupta, Amit K. Ror, Pranshu, Kuntal Mishra, and Shashi B. Pandey (ARIES) report: We observed the field of GRB 241229A detected by SVOM (Liang et al 2024, GCN 38697) with the 1.3m Devasthal Fast Optical Telescope (DFOT), located at the Devasthal Observatory of the Aryabhatta Research Institute of Observational … [View More]

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[vsnet-grb-info 36818] GRB 241228B: 1.3m DFOT Optical observations
by GCN Circulars 04 Jan '25

04 Jan '25

TITLE: GCN CIRCULAR NUMBER: 38816 SUBJECT: GRB 241228B: 1.3m DFOT Optical observations DATE: 25/01/04 05:44:27 GMT FROM: Amit Kumar Ror at ARIES <mitturor77894(a)gmail.com> Amit K. Ror, Anshika Gupta, Pranshu, Shashi B. Pandey, Kuntal Mishra (ARIES) report: We observed the field of GRB 241228B detected by the Fermi Gamma-ray Burst Monitor (Fermi GBM team, GCN 38682), with the 1.3m Devasthal Fast Optical Telescope (DFOT), located at the Devasthal Observatory of the Aryabhatta … [View More]

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