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

[vsnet-grb-info 37067] GRB 250128B: Swift detection of a short burst
by GCN Circulars 28 Jan '25

28 Jan '25

TITLE: GCN CIRCULAR NUMBER: 39058 SUBJECT: GRB 250128B: Swift detection of a short burst DATE: 25/01/28 16:38:33 GMT FROM: P.A. Evans at U. Leicester <pae9(a)leicester.ac.uk> P. A. Evans (U Leicester), R. A. J. Eyles-Ferris (U Leicester), R. Gupta (NASA GSFC), J. A. Kennea (PSU), K. L. Page (U Leicester), B. Sbarufatti (INAF-OAB) and M. A. Williams (PSU) report on behalf of the Neil Gehrels Swift Observatory Team: At 16:22:53 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 250128B (trigger=1285677). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 231.420, -0.517 which is RA(J2000) = 15h 25m 41s Dec(J2000) = -00d 31' 01" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a single peak structure with a duration of about 0.5 sec. The peak count rate was ~5578 counts/sec (15-350 keV), at ~0 sec after the trigger. The XRT began observing the field at 16:24:12.3 UT, 78.6 seconds after the BAT trigger. Using promptly downlinked data we find an uncatalogued X-ray source with an enhanced position: RA, Dec 231.42552, -0.53970 which is equivalent to: RA(J2000) = 15h 25m 42.12s Dec(J2000) = -00d 32' 22.9" with an uncertainty of 1.9 arcseconds (radius, 90% containment). This location is 84 arcseconds from the BAT onboard position, within the BAT error circle. This position may be improved as more data are received; the latest position is available at https://www.swift.ac.uk/sper. We cannot determine whether the source is fading at the present time. A power-law fit to a spectrum formed from promptly downlinked event data gives a column density consistent with the Galactic value of 8.00 x 10^20 cm^-2 (Willingale et al. 2013). UVOT took a finding chart exposure of 150 seconds with the White filter starting 82 seconds after the BAT trigger. No credible afterglow candidate has been found in the initial data products. The 2.7'x2.7' sub-image covers 100% of the XRT error circle. The typical 3-sigma upper limit has been about 19.6 mag. The 8'x8' region for the list of sources generated on-board covers 100% of the XRT error circle. The list of sources is typically complete to about 18 mag. No correction has been made for the expected extinction corresponding to E(B-V) of 0.121. Burst Advocate for this burst is P. A. Evans (pae9 AT leicester.ac.uk). Please contact the BA by email if you require additional information regarding Swift followup of this burst. In extremely urgent cases, after trying the Burst Advocate, you can contact the Swift PI by phone (see Swift TOO web site for information: http://www.swift.psu.edu/) View this GCN Circular online at https://gcn.nasa.gov/circulars/39058. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 37066] GRB 250128B: Fermi GBM Final Real-time Localization
by GCN Circulars 28 Jan '25

28 Jan '25

TITLE: GCN CIRCULAR NUMBER: 39057 SUBJECT: GRB 250128B: Fermi GBM Final Real-time Localization DATE: 25/01/28 16:33:27 GMT FROM: Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply(a)GIOC.nsstc.nasa.gov> The Fermi GBM team reports the detection of a likely SHORT GRB At 16:22:53 UT on 28 Jan 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 250128B (trigger 759774178.772694 / 250128683). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 264.8, Dec = -46.6 (J2000 degrees, equivalent to J2000 17h 39m, -46d 36'), with a statistical uncertainty of 8.2 degrees. The angle from the Fermi LAT boresight is 145.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250128683/… The HEALPix FITS file, including the estimated localization systematic, can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250128683/… The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250128683/… View this GCN Circular online at https://gcn.nasa.gov/circulars/39057. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 37065] GRB 250127A: Swift-XRT observations
by GCN Circulars 28 Jan '25

28 Jan '25

TITLE: GCN CIRCULAR NUMBER: 39056 SUBJECT: GRB 250127A: Swift-XRT observations DATE: 25/01/28 16:28:52 GMT FROM: Phil Evans at U of Leicester <pae9(a)star.le.ac.uk> J.A. Kennea (PSU), A.P. Beardmore (U. Leicester), J.P. Osborne (U. Leicester), B. Sbarufatti (INAF-OAB), C. Salvaggio (INAF-OAB), M. Ferro (INAF-OAB), 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 SVOM/ECLAIRs-detected burst GRB 250127A, collecting 2.9 ks of Photon Counting (PC) mode data between T0+18.3 ks and T0+25.4 ks. One uncatalogued X-ray sources have been detected within the estimated 90% SVOM/ECLAIRs error region (4.8 arcmin; GCN Circ. 39041), it is below the RASS limit and shows no definitive signs of fading in the two snapshot of observations that were taken. Details of this source are given below: Source 2: RA (J2000.0): 169.6282 = 11:18:30.76 Dec (J2000.0): +3.3518 = +03:21:06.4 Error: 8.6 arcsec (radius, 90% conf.) Count-rate: (2.9 [+1.5, -1.1])e-3 ct s^-1 Distance: 138 arcsec from SVOM/ECLAIRs position. Flux: (3.3 [+1.7, -1.3])e-13 erg cm^-2 s^-1 (observed, 0.3-10 keV) The source was also detected by the FXT telescope on board of Einstein Probe (GCN Circ. 39053), which observed this field around the same time of the XRT observations. The results of the XRT-team automatic analysis of the XRT observations, including a position-specific upper limit calculator, are available at https://www.swift.ac.uk/ToO_GRBs/00021757. This circular is an official product of the Swift-XRT team. View this GCN Circular online at https://gcn.nasa.gov/circulars/39056. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 37064] GRB 250127B: DDOTI Upper Limit on the Afterglow
by GCN Circulars 28 Jan '25

28 Jan '25

TITLE: GCN CIRCULAR NUMBER: 39055 SUBJECT: GRB 250127B: DDOTI Upper Limit on the Afterglow DATE: 25/01/28 14:48:39 GMT FROM: Rosa L. Becerra at Tor Vergata, Roma <rosa.becerra(a)roma2.infn.it> Rosa L. Becerra (U Rome), Alan M. Watson (UNAM), Eleonora Troja (U Rome), Camila Angulo Valdez (UNAM), Nat Butler (ASU), Simone Dichiara (Penn State University), Tsvetelina Dimitrova (ASU), Alexander Kutyrev (GSFC/UMD), William H. Lee (UNAM), Océlotl López (UNAM), and Margarita Pereyra (UNAM) report: We observed the field of the GRB 250127B detected by Fermi/GBM (Fermi GBM Team, GCN 39046) with the DDOTI/OAN wide-field imager at the Observatorio Astronómico Nacional on Sierra San Pedro Mártir (http://ddoti.astroscu.unam.mx) on 2025-01-28 from 10:24 to 10:53 UTC (19.2 to 19.7 hrs after the event). Our observations cover about the 70% of the error region (statistical only) down to a 10-sigma limiting magnitude of w = 20 AB mag. Comparing our observations to the USNO-B1 and PanSTARRS PS1 DR2 catalogues, we detect no uncatalogued sources within the observed field to our 10-sigma limit within the error radius reported by Fermi/GBM (Fermi GBM Team, GCN 39046). This upper limit is consistent with the non detection from the Global MASTER-Net (Lipunov et al., 2025, GCN 39049). We thank the DDOTI technical team and the staff of the Observatorio Astronómico Nacional. View this GCN Circular online at https://gcn.nasa.gov/circulars/39055. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 37063] Fermi-LAT Gamma-ray Observations of IceCube-250102A
by GCN Circulars 28 Jan '25

28 Jan '25

TITLE: GCN CIRCULAR NUMBER: 39054 SUBJECT: Fermi-LAT Gamma-ray Observations of IceCube-250102A DATE: 25/01/28 12:08:26 GMT FROM: Simone Garrappa at Weizmann Institute of Science <simone.garrappa(a)weizmann.ac.il> S. Garrappa (Weizmann Institute of Science), C. Bartolini (INFN Bari), L. Pfeiffer (Univ. of Wuerzburg), S. Buson (DESY, Univ. of Wuerzburg) and P. M. Veres (Ruhr University Bochum) on behalf of the Fermi-LAT collaboration: We report an analysis of observations of the vicinity of the high-energy IC250102A neutrino event (GCN 38781) with all-sky survey data from the Large Area Telescope (LAT), on board the Fermi Gamma-ray Space Telescope. The IceCube event was detected on 2025-01-02 13:48:01.92 UTC (T0) with J2000 position RA = 262.79 (+1.32, -1.09) deg, Decl. = 6.69 (+0.97, -0.84) deg 90% PSF containment. Two cataloged gamma-ray sources are found within the 90% IC250102A localization error (The Fourth Fermi-LAT catalog, 4FGL-DR4, The Fermi-LAT collaboration 2023, arXiv:2307.12546). These are the unassociated source 4FGL J1731.6+0630 and 4FGL J1727.2+0644, associated with the blazar of uncertain type NVSS J172720+064123. Based on a preliminary analysis of the LAT data over the timescale of one month prior T0, these objects are not significantly detected at gamma-rays. We searched for the existence of intermediate (days to years) timescale emission from a new gamma-ray transient source. Preliminary analysis indicates no significant (>5sigma) new excess emission (> 100 MeV) within the IC250102A 90% confidence localization. Assuming a power-law spectrum (photon index = 2.0 fixed) for a point source at the IceCube best-fit position, the >100 MeV flux upper limit (95% confidence) is <4.7e-10 ph cm^-2 s^-1 for ~16-years (2008-08-04 / T0), <1.6e-08 ph cm^-2 s^-1 for a 1-month integration time before T0. Since Fermi normally operates in an all-sky scanning mode, regular monitoring of this source will continue. For this source, the Fermi-LAT contact person is S. Garrappa (simone.garrappa at weizmann.ac.il). The Fermi LAT is a pair conversion telescope designed to cover the energy band from 20 MeV to greater than 300 GeV. It is the product of an international collaboration between NASA and DOE in the U.S. and many scientific institutions across France, Italy, Japan and Sweden. View this GCN Circular online at https://gcn.nasa.gov/circulars/39054. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 37062] GRB 250127A: EP-FXT afterglow detection
by GCN Circulars 28 Jan '25

28 Jan '25

TITLE: GCN CIRCULAR NUMBER: 39053 SUBJECT: GRB 250127A: EP-FXT afterglow detection DATE: 25/01/28 11:49:14 GMT FROM: EP Team at NAOC/CAS <ep_ta(a)bao.ac.cn> Y.-H. I. Yin (NJU), Y. L. Wang, H. N. Yang, H. Y. Liu (NAO, CAS), Z. Y. Liu, M. Q. Huang (USTC), Z. X. Ling, Y. Liu (NAO, CAS), B. Cordier (CEA) on behalf of the Einstein Probe team: We performed a follow-up observation of GRB 250127A (SVOM, Wu et al., GCN 39041) with the Follow-up X-ray Telescope (FXT) on board the Einstein Probe (EP) mission. The observation started at 2025-01-27 11:29:09 (UTC) with ~ 2.4 ks of exposure in total. An uncatalogued X-ray source is detected by both modules of FXT at the position of R. A. = 169.6284 deg, DEC = 3.3508 deg (J2000) with an uncertainty of 10 arcsec (90% C. L.), which is 2.38 arcmin away from the SVOM position (Wu et al., GCN 39041). This position is also consistent with the location of Swift/XRT Source 2 (P. A. Evans, GCN 39044). The average FXT 0.5-10 keV spectrum can be fitted with an absorbed power law with a fixed Galactic equivalent hydrogen column density of 4.52 x 10^20 cm^-2 and a photon index of 1.79 (-0.92/+0.92). The derived average unabsorbed 0.5-10 keV flux is 1.30 (-0.68/+1.44) x 10^(-13) erg/s/cm^2. The uncertainties are at the 90% confidence level for the above parameters. Launched on January 9, 2024, EP is a space X-ray observatory to monitor the soft X-ray sky with X-ray follow-up capability (Yuan et al. 2022, Handbook of X-ray and Gamma-ray Astrophysics). EP is a mission of the Chinese Academy of Sciences in collaboration with ESA, MPE and CNES. View this GCN Circular online at https://gcn.nasa.gov/circulars/39053. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 37061] Fermi GRB 250128A: Global MASTER-Net observations report
by GCN Circulars 28 Jan '25

28 Jan '25

TITLE: GCN CIRCULAR NUMBER: 39052 SUBJECT: Fermi GRB 250128A: Global MASTER-Net observations report DATE: 25/01/28 11:32:15 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov(a)xray.sai.msu.ru> V.Lipunov, E.Gorbovskoy, N.Tiurina, P.Balanutsa, , D.Vlasenko, I.Panchenko, A.Kuznetsov, G.Antipov, A.Sankovich, A.Sosnovskij, Yu.Tselik, M.Gulyaev, Ya.Kechin, V.Senik, A.Chasovnikov, K.Labsina, I. Gorbunov (Lomonosov MSU), O.Gress, N.Budnev (ISU), C.Francile, F. Podesta, R.Podesta, E. Gonzalez (Observatorio Astronomico Felix Aguilar (OAFA), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), A. Gabovich, V.Yurkov (Blagoveschensk Educational StateUniversity) D.Buckley (SAAO), R.Rebolo (The Instituto de Astrofisica de Canarias), L.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez (INAOE, Guillermo Haro Astrophysics Observatory) MASTER-Tunka robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Applied Physics Institute, Irkutsk State University) started inspect of the Fermi GRB 250128A ( Fermi GBM team, GCN 39051) errorbox 568 sec after notice time and 595 sec after trigger time at 2025-01-28 10:43:38 UT, with upper limit up to 15.8 mag. Observations started at twilight. The observations began at zenith distance = 53 deg. The sun altitude is -8.6 deg. The galactic latitude b = 23 deg., longitude l = 93 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2758800 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 597 | 2025-01-28 10:43:38 | MASTER-Tunka | (18h 55m 15.13s , +62d 26m 57.5s) | C | 1 | 15.2 | 598 | 2025-01-28 10:43:38 | MASTER-Tunka | (18h 55m 15.13s , +62d 26m 57.5s) | C | 3 | 15.8 | Coadd 602 | 2025-01-28 10:43:43 | MASTER-Tunka | (18h 55m 15.05s , +62d 26m 57.5s) | C | 1 | 15.1 | 608 | 2025-01-28 10:43:49 | MASTER-Tunka | (18h 55m 15.04s , +62d 26m 56.9s) | C | 1 | 15.1 | 613 | 2025-01-28 10:43:54 | MASTER-Tunka | (18h 55m 15.13s , +62d 26m 56.7s) | C | 1 | 15.3 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited. View this GCN Circular online at https://gcn.nasa.gov/circulars/39052. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 37060] GRB 250128A: Fermi GBM Final Real-time Localization
by GCN Circulars 28 Jan '25

28 Jan '25

TITLE: GCN CIRCULAR NUMBER: 39051 SUBJECT: GRB 250128A: Fermi GBM Final Real-time Localization DATE: 25/01/28 10:44:09 GMT FROM: Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply(a)GIOC.nsstc.nasa.gov> The Fermi GBM team reports the detection of a likely LONG GRB At 10:33:42 UT on 28 Jan 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 250128A (trigger 759753227.594888 / 250128440). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 284.0, Dec = 62.3 (J2000 degrees, equivalent to J2000 18h 56m, 62d 17'), with a statistical uncertainty of 5.4 degrees. The angle from the Fermi LAT boresight is 109.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250128440/… The HEALPix FITS file, including the estimated localization systematic, can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250128440/… The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250128440/… View this GCN Circular online at https://gcn.nasa.gov/circulars/39051. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 37059] GRB 250117A: Fermi GBM Observation
by GCN Circulars 28 Jan '25

28 Jan '25

TITLE: GCN CIRCULAR NUMBER: 39050 SUBJECT: GRB 250117A: Fermi GBM Observation DATE: 25/01/28 00:30:20 GMT FROM: oindabimukherjee(a)gmail.com O. Mukherjee (USRA) and C. Meegan (UAH) report on behalf of the Fermi Gamma-ray Burst Monitor Team: "At 20:21:57.89 UT on 17 January 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 250117A (trigger 758838122/250117849). which was also detected by Konus-Wind (Ridnaia et al. 2025, GCN 39001), Swift/BAT-GUANO (DeLaunay et al. 2025, GCN 38988), and SVOM/GRM (Wang et al. 2025, GCN 38994). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 252.55, Dec = -26.18 (J2000 degrees, equivalent to J2000 20h 26m, +21d 13'), with a statistical uncertainty of 3.32 degrees. (radius, 1-sigma containment, statistical only; there is additionally a systematic error which we have characterized as a mixture of two Gaussians, one with a radius of 1.8 degrees (52% contribution) and one with a radius of 4.1 degrees (47% contribution) [A. Goldstein et al. 2020, ApJ, 895, 1]). The angle from the Fermi LAT boresight is 67 degrees. An overwhelming volume of data produced by a contemporaneous solar flare affected the spacecraft's ability to record data nominally, so TTE data was unavailable for this burst. Consequently, the temporal and spectral analysis used the CTIME and CSPEC data types only. The GBM light curve consists of one peak with a duration (T90) of about 0.8 s (50-300 keV). The time-averaged spectrum from T0+0.002 to T0+1.824 s is best fit by a power law function with an exponential high-energy cutoff. The power law index is -1.18 +/- 0.09 and the cutoff energy, parameterized as Epeak, is 904 +/- 386 keV. The event fluence (10-1000 keV) in this time interval is (1.35 +/- 0.08)E-06 erg/cm^2. The 64-ms peak photon flux measured starting from T0+0.35 s in the 10-1000 keV band is 27 +/- 1 ph/s/cm^2. The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog: https://heasarc.gsfc.nasa.gov/W3Browse/fermi/fermigbrst.html For Fermi GBM data and info, please visit the official Fermi GBM Support Page: https://fermi.gsfc.nasa.gov/ssc/data/access/gbm/" View this GCN Circular online at https://gcn.nasa.gov/circulars/39050. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 37058] Fermi GRB 250127B: Global MASTER-Net observations report
by GCN Circulars 27 Jan '25

27 Jan '25

TITLE: GCN CIRCULAR NUMBER: 39049 SUBJECT: Fermi GRB 250127B: Global MASTER-Net observations report DATE: 25/01/27 18:46:18 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov(a)xray.sai.msu.ru> V.Lipunov, E.Gorbovskoy, N.Tiurina, P.Balanutsa, , D.Vlasenko, I.Panchenko, A.Kuznetsov, G.Antipov, A.Sankovich, A.Sosnovskij, Yu.Tselik, M.Gulyaev, Ya.Kechin, V.Senik, A.Chasovnikov, K.Labsina, I. Gorbunov (Lomonosov MSU), O.Gress, N.Budnev (ISU), C.Francile, F. Podesta, R.Podesta, E. Gonzalez (Observatorio Astronomico Felix Aguilar (OAFA), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), A. Gabovich, V.Yurkov (Blagoveschensk Educational StateUniversity) D.Buckley (SAAO), R.Rebolo (The Instituto de Astrofisica de Canarias), L.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez (INAOE, Guillermo Haro Astrophysics Observatory) MASTER-Tavrida robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Lomonosov MSU, SAI Crimea astronomical station) started inspect of the Fermi GRB 250127B ( Fermi GBM team, GCN 39046) errorbox 8653 sec after notice time and 8678 sec after trigger time at 2025-01-27 17:39:17 UT, with upper limit up to 17.4 mag. The observations began at zenith distance = 79 deg. The sun altitude is -31.2 deg. The galactic latitude b = 13 deg., longitude l = 241 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2757386 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 8709 | 2025-01-27 17:39:17 | MASTER-Tavrida | (08h 26m 29.18s , -13d 05m 34.9s) | C | 60 | 17.4 | 9585 | 2025-01-27 17:53:53 | MASTER-Tavrida | (08h 26m 26.09s , -13d 07m 38.9s) | C | 60 | 17.0 | 9659 | 2025-01-27 17:55:07 | MASTER-Tavrida | (08h 21m 05.82s , -14d 24m 11.6s) | C | 60 | 17.0 | 9733 | 2025-01-27 17:56:21 | MASTER-Tavrida | (08h 29m 21.40s , -14d 25m 09.7s) | C | 60 | 17.2 | 9885 | 2025-01-27 17:58:53 | MASTER-Tavrida | (08h 13m 21.91s , -15d 42m 30.9s) | C | 60 | 17.0 | 9960 | 2025-01-27 18:00:08 | MASTER-Tavrida | (08h 21m 46.42s , -15d 43m 06.4s) | C | 60 | 16.8 | 10188 | 2025-01-27 18:03:56 | MASTER-Tavrida | (08h 26m 28.97s , -13d 06m 24.3s) | C | 60 | 16.9 | 10262 | 2025-01-27 18:05:10 | MASTER-Tavrida | (08h 21m 06.32s , -14d 26m 13.7s) | C | 60 | 16.7 | 10345 | 2025-01-27 18:06:33 | MASTER-Tavrida | (08h 29m 24.09s , -14d 24m 04.8s) | C | 60 | 16.7 | 10498 | 2025-01-27 18:09:06 | MASTER-Tavrida | (08h 13m 22.35s , -15d 42m 47.7s) | C | 60 | 16.8 | 10573 | 2025-01-27 18:10:21 | MASTER-Tavrida | (08h 21m 46.78s , -15d 43m 23.2s) | C | 60 | 16.5 | 10810 | 2025-01-27 18:14:18 | MASTER-Tavrida | (08h 26m 29.19s , -13d 06m 37.1s) | C | 60 | 16.4 | 10886 | 2025-01-27 18:15:34 | MASTER-Tavrida | (08h 21m 06.55s , -14d 26m 28.9s) | C | 60 | 16.4 | 10969 | 2025-01-27 18:16:57 | MASTER-Tavrida | (08h 29m 24.38s , -14d 24m 13.0s) | C | 60 | 16.4 | 11120 | 2025-01-27 18:19:28 | MASTER-Tavrida | (08h 13m 22.91s , -15d 43m 04.6s) | C | 60 | 16.4 | 11203 | 2025-01-27 18:20:51 | MASTER-Tavrida | (08h 21m 47.60s , -15d 43m 39.9s) | C | 60 | 16.1 | 11430 | 2025-01-27 18:24:38 | MASTER-Tavrida | (08h 26m 29.38s , -13d 06m 49.0s) | C | 60 | 15.6 | 11504 | 2025-01-27 18:25:52 | MASTER-Tavrida | (08h 21m 06.72s , -14d 26m 40.9s) | C | 60 | 15.4 | 11579 | 2025-01-27 18:27:07 | MASTER-Tavrida | (08h 29m 26.07s , -14d 24m 28.8s) | C | 60 | 15.6 | 11739 | 2025-01-27 18:29:47 | MASTER-Tavrida | (08h 13m 23.62s , -15d 43m 22.1s) | C | 60 | 16.2 | 11814 | 2025-01-27 18:31:02 | MASTER-Tavrida | (08h 21m 47.72s , -15d 43m 57.5s) | C | 60 | 15.6 | 12055 | 2025-01-27 18:35:03 | MASTER-Tavrida | (08h 26m 29.58s , -13d 06m 57.8s) | C | 60 | 16.7 | 12130 | 2025-01-27 18:36:18 | MASTER-Tavrida | (08h 21m 06.92s , -14d 26m 52.0s) | C | 60 | 16.6 | 12204 | 2025-01-27 18:37:32 | MASTER-Tavrida | (08h 29m 25.66s , -14d 25m 12.6s) | C | 60 | 16.4 | 12373 | 2025-01-27 18:40:21 | MASTER-Tavrida | (08h 13m 22.75s , -15d 43m 40.8s) | C | 60 | 17.2 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited. View this GCN Circular online at https://gcn.nasa.gov/circulars/39049. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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