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

[vsnet-grb-info 36887] IPN triangulation of GRB 250107D (short/hard)
by GCN Circulars 09 Jan '25

09 Jan '25

TITLE: GCN CIRCULAR NUMBER: 38880 SUBJECT: IPN triangulation of GRB 250107D (short/hard) DATE: 25/01/09 22:06:45 GMT FROM: Dmitry Svinkin at Ioffe Institute <svinkin(a)mail.ioffe.ru> A.S. Kozyrev, D.V. Golovin, M.L. Litvak, I.G. Mitrofanov, and A.B. Sanin on behalf of the HEND/Mars Odyssey team, D. Svinkin, D. Frederiks, A. Lysenko, A. Ridnaia, and T. Cline on behalf of the Konus-Wind team, E. Burns on behalf of the IPN, E. Bozzo and C. Ferrigno, on behalf of the INTEGRAL SPI-ACS GRB team, S. Barthelmy, J. Cummings, H. Krimm, D. Palmer, and A. Tohuvavohu on behalf of the Swift-BAT team, and W. Boynton, C. Fellows, K. Harshman, H. Enos, R. Starr, and A.S. Gardner on on behalf of the GRS-Odyssey GRB team, report: The short-duration GRB 250107D was detected by Konus-Wind, INTEGRAL (SPI-ACS), Swift (BAT), and Mars-Odyssey(HEND), at about 19406 s UT (05:23:26). The burst was outside the coded field of view of the BAT. We have triangulated it to a preliminary, 3 sigma error box whose coordinates are: --------------------------------------------- RA(2000), deg Dec(2000), deg --------------------------------------------- Center: 259.300 (17h 17m 12s) -29.710 (-29d 42' 37") Corners: 259.267 (17h 17m 04s) -28.346 (-28d 20' 46") 259.147 (17h 16m 35s) -30.541 (-30d 32' 29") 259.382 (17h 17m 32s) -30.988 (-30d 59' 15") 259.469 (17h 17m 52s) -28.855 (-28d 51' 18") --------------------------------------------- The error box area is 1635 sq. arcmin, and its maximum dimension is 2.6 deg (the minimum one is 12.6 arcmin). The Sun distance was 27 deg. This localization may be improved. A triangulation map and HEALPix FITS file are posted at http://www.ioffe.ru/LEA/GRBs/GRB250107_T19411/IPN/ The HEALPix triangulation map is the multi-order HEALPix in units of probability density. The Konus-Wind time history and spectrum will be given in a forthcoming GCN Circular. View this GCN Circular online at https://gcn.nasa.gov/circulars/38880. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 36886] IPN triangulation of GRB 250107C
by GCN Circulars 09 Jan '25

09 Jan '25

TITLE: GCN CIRCULAR NUMBER: 38879 SUBJECT: IPN triangulation of GRB 250107C DATE: 25/01/09 22:04:46 GMT FROM: Dmitry Svinkin at Ioffe Institute <svinkin(a)mail.ioffe.ru> D. Svinkin, D. Frederiks, A. Lysenko, A. Ridnaia, and T. Cline on behalf of the Konus-Wind team, Y. Zhang, C. Wang, S. Xiong, J. Wei, and B. Cordier on behalf of the SVOM-GRM team, A. Goldstein, M. S. Briggs, C. Wilson-Hodge, and E. Burns on behalf of the Fermi GBM team, S. Barthelmy, J. Cummings, H. Krimm, D. Palmer, and A. Tohuvavohu on behalf of the Swift-BAT team, report: The long-duration GRB 250107C (SVOM-GRM and GECAM-B detections: Xue et al., GCN 38870) was detected by Konus-Wind, SVOM (GRM), and GECAM-B at about 67936 s UT (18:52:16). We have triangulated it to a preliminary, 3 sigma error box whose area is 22.6 sq. deg, and its maximum dimension is 22.8 deg (the minimum one is 1.0 deg). The Sun distance was 73 deg. This localization may be improved. A triangulation map and HEALPix FITS file are posted at http://www.ioffe.ru/LEA/GRBs/GRB250107_T67934/IPN/ The HEALPix triangulation map is the multi-order HEALPix in units of probability density. The Konus-Wind time history and spectrum will be given in a forthcoming GCN Circular. View this GCN Circular online at https://gcn.nasa.gov/circulars/38879. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 36885] EP250108a: Liverpool Telescope likely optical counterpart
by GCN Circulars 09 Jan '25

09 Jan '25

TITLE: GCN CIRCULAR NUMBER: 38878 SUBJECT: EP250108a: Liverpool Telescope likely optical counterpart DATE: 25/01/09 21:42:48 GMT FROM: Rob Eyles-Ferris at U of Leicester <raje1(a)leicester.ac.uk> R. Eyles-Ferris (U of Leicester) reports: We observed the field of the X-ray transient EP250108a (Li et al., GCN 38861) using the IO:O on the 2m Liverpool Telescope. We obtained 6x200s exposures in the SDSS g’ filter starting at 2025-01-09 19:59:08 UT, approximately 31.5 hours after the trigger. We performed image subtraction on the stacked image using a reference Pan-STARRS image and identify a source of g’ = 20.79+/-0.05 with photometry calibrated to Pan-STARRS and not corrected for Galactic extinction. The source is located at RA, Dec = 55.61823, -22.50587 deg, which is equivalent to: RA (J2000) : 03:42:28.38 Dec (J2000): -22:30:21.1 This source is within the error region of the Einstein Probe detection and is the only source within it in the subtracted image. It is also visible in the individual frames. There is a catalogued DES DR1/2 source with a measured g’ band magnitude of 23.3 and a photometric redshift of 0.882+/-0.379 consistent with our measured position. We suggest this is the host galaxy. Further observations are planned. View this GCN Circular online at https://gcn.nasa.gov/circulars/38878. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 36884] GRB 250108B: Gemini-North likely redshift z = 2.197
by GCN Circulars 09 Jan '25

09 Jan '25

TITLE: GCN CIRCULAR NUMBER: 38877 SUBJECT: GRB 250108B: Gemini-North likely redshift z = 2.197 DATE: 25/01/09 17:37:07 GMT FROM: Jillian Rastinejad at Northwestern Univ. <jillianrastinejad2024(a)u.northwestern.edu> Daniele B. Malesani (DAWN/ NBI and Radboud), Jillian C. Rastinejad (Northwestern), Andrew J. Levan (Radboud), Wen-fai Fong, Charlie Kilpatrick (Northwestern), Gavin P. Lamb (LJMU), and Nial R. Tanvir (Leicester) report on behalf of a larger collaboration: Following the detection of the optical afterglow (Rastinejad et al., GCN 38855) of GRB 250108B (Klinger et al., GCN 38847), we obtained optical spectroscopy using the Gemini Multi-Object Spectrograph (GMOS-N) mounted on Gemini-North, under Program GN-2024B-Q-107 (P.I. Rastinejad). The mean time of the observation was 15:12 UT on 2025 Jan 8 (4.81 hr post-burst). The total exposure time was 4x400 s using the R400 grating, which covers the wavelength range 4650-9450 AA. Given the faintness of the target (r ~ 23.4; Rastinejad et al., GCN 38855), only a weak trace is detected, with most of the signal apparent at the red end of the spectrum. A few absorption features are weakly detected. A possible redshift solution, based on the detection of Mg I 2852, Mg II 2796,2803, Fe II 2600, and Fe II 2586, yields z = 2.197, which we suggest to be the redshift of GRB 250108B. The slit was aligned in order to cover also the nearby galaxy (Rastinejad et al., GCN 38855) at coordinates RA = 13:25:18.72, Dec = +25:37:12.7, with photometric redshift z = 0.2-0.3, resulting in a bright trace. We detect Halpha, [N II], and [S II] at z = 0.302, consistent with the Legacy Survey photometric redshift of z = 0.29 +/- 0.04 (Zhou et al., 2021). Our observations indicate that this object is unlikely to be physically connected to the GRB. We thank Jen Miller, Leila Alamos, Brian Lemaux and additional Gemini staff for excellent support in the rapid planning and execution of these observations. View this GCN Circular online at https://gcn.nasa.gov/circulars/38877. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 36883] GRB 250108B: Swift-BAT refined analysis
by GCN Circulars 09 Jan '25

09 Jan '25

TITLE: GCN CIRCULAR NUMBER: 38876 SUBJECT: GRB 250108B: Swift-BAT refined analysis DATE: 25/01/09 16:42:39 GMT FROM: Rahul Gupta at NASA GSFC <rahul.gupta(a)nasa.gov> S. Laha (GSFC/UMBC), S. D. Barthelmy (GSFC), R. Gupta (GSFC), N. J. Klingler (GSFC/UMBC/CRESSTII), H. A. Krimm (NSF), A. Y. Lien (U Tampa), C. B. Markwardt (GSFC), M. J. Moss (GSFC), D. M. Palmer (LANL), T. Parsotan (GSFC), D. Sadaula (GSFC/UMBC), T. Sakamoto (AGU) (i.e. the Swift-BAT team): Using the data set from T-239 to T+792 sec from the recent telemetry downlink, we report further analysis of BAT GRB 250108B (trigger #1280056) (Klinger et al., GCN Circ. 38847). The BAT ground-calculated position is RA, Dec = 201.312, 25.622 deg which is RA(J2000) = 13h 25m 14.8s Dec(J2000) = +25d 37' 19.4" with an uncertainty of 1.8 arcmin, (radius, sys+stat, 90% containment). The partial coding was 89%. The mask-weighted light curve exhibits multi-peaked structures, including evidence of precursor emission prior to the main burst. T90 (15-350 keV) is 229.66 +- 43.30 sec (estimated error including systematics). The time-averaged spectrum from T-63.14 to T+218.21 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.63 +- 0.19. The fluence in the 15-150 keV band is 1.7 +- 0.2 x 10^-06 erg/cm2. The 1-sec peak photon flux measured from T+1.56 sec in the 15-150 keV band is 0.6 +- 0.2 ph/cm2/sec. All the quoted errors are at the 90% confidence level. The results of the batgrbproduct analysis are available at https://swift.gsfc.nasa.gov/results/batgrbcat/BAT_refined_circular/1280056 View this GCN Circular online at https://gcn.nasa.gov/circulars/38876. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 36882] GRB 250108B: 1.3m DFOT upper limit
by GCN Circulars 09 Jan '25

09 Jan '25

TITLE: GCN CIRCULAR NUMBER: 38875 SUBJECT: GRB 250108B: 1.3m DFOT upper limit DATE: 25/01/09 16:23:09 GMT FROM: Amit Kumar Ror at ARIES <mitturor77894(a)gmail.com> Amit K. Ror, Anshika Gupta, RKS Yadav, Shashi B. Pandey, Kuntal Mishra (ARIES) report: We observed the field of GRB 250108B detected by Swift (Swift Observatory Team, Klingler et al. 2025, GCN 38847) with the 1.3m Devasthal Fast Optical Telescope (DFOT), located at the Devasthal Observatory of the Aryabhatta Research Institute of Observational Sciences (ARIES), India. The observations were started on 2025-01-08 at 21:58:57 UT, i.e., ~ 0.48 days after the Swift-BAT trigger. We have taken multiple frames with an exposure time of 300s in the R filter. We stacked the images after the alignment. We could not detect the optical emission reported by Rastinejad et al. (2025, GCN 38855) in our stacked image within the error box enhanced Swift-XRT position (Osborne et al. 2025, GCN 38848). We obtain the following 3-sigma upper limit in the stacked image: Date Start_UT T_start-T0 (days) Filter Exp time (s) Magnitude ========================================================= 2025-01-08 21:58:57 ~ 0.48 R 300s*12 >21.8 The non-detection of the burst is consistent with the upper limits reported by Breeveld et al. 2025, GCN 38850 and Lipunov et al. 2025, GCN 38858. The magnitude is not corrected for the Galactic extinction in the direction of the burst. Photometric calibration is performed using the standard stars from the USNO-B1.0 catalogue. This circular may be cited. View this GCN Circular online at https://gcn.nasa.gov/circulars/38875. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 36881] GRB 250108B: REM optical/NIR upper limits
by GCN Circulars 09 Jan '25

09 Jan '25

TITLE: GCN CIRCULAR NUMBER: 38874 SUBJECT: GRB 250108B: REM optical/NIR upper limits DATE: 25/01/09 16:12:35 GMT FROM: Riccardo Brivio at INAF-OAB <riccardo.brivio(a)inaf.it> R. Brivio, M. Ferro, P. D’Avanzo, S. Covino, D. Fugazza (INAF-OAB) report on behalf of the REM team: We observed the field of GRB 250108B detected by Swift (Klingler et al., GCN 38847) with the REM 60cm robotic telescope located at the ESO observatory of La Silla (Chile). The observations were carried in the g, r, i, z, J, H, K bands, starting on 2025 January 09 at 07:02:48 UT (i.e. 21.07 hours after the Swift trigger), and lasting for about 1 hour. Within the XRT-enhanced position (Osborne et al., GCN 38848), from preliminary photometry we do not detect any optical or NIR counterpart consistent with the candidate optical afterglow (Rastinejad et al., GCN 38855), down to the following 3sigma magnitude upper limits: r > 20.1 (AB; calibrated against the PanSTARRS catalogue) at a mid-time of t - t0 = 21.2 hr after the trigger, H > 17.0 (Vega; calibrated against the 2MASS catalogue) at a mid-time of t - t0 = 21.1 hr after the trigger. View this GCN Circular online at https://gcn.nasa.gov/circulars/38874. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 36880] GRB 250109A /EP250109a: Fermi GBM Final Localization
by GCN Circulars 09 Jan '25

09 Jan '25

TITLE: GCN CIRCULAR NUMBER: 38873 SUBJECT: GRB 250109A /EP250109a: Fermi GBM Final Localization DATE: 25/01/09 16:02:55 GMT FROM: Utkarsh Pathak at IIT Bombay <utkarshpathak.07(a)gmail.com> The Fermi GBM team reports the detection of a likely LONG GRB At 06:17:08.60 UT on 9 January 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 250109A (trigger 758096233/250109262). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 84.43, Dec = 2.26 (J2000 degrees, equivalent to J2000 05h 37m, 02d 15'), with a statistical uncertainty of 13.52 degrees. This event is associated with EP250109a (Li et al. 2025, GCN 38864). The angle from the Fermi LAT boresight is 69.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250109262/… The HEALPix FITS file, including the estimated localization systematic, can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250109262/… The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250109262/… View this GCN Circular online at https://gcn.nasa.gov/circulars/38873. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 36879] EP250109a: SVOM/VT optical candidate
by GCN Circulars 09 Jan '25

09 Jan '25

TITLE: GCN CIRCULAR NUMBER: 38872 SUBJECT: EP250109a: SVOM/VT optical candidate DATE: 25/01/09 13:56:18 GMT FROM: Liping Xin at NAOC, SVOM <xlp(a)nao.cas.cn> SVOM/VT commissioning team: Y. L. Qiu, H. L. Li, H. Sun, L. P. Xin, C. Wu, X. H. Han, J. Wang, W. J. Xie, H. B. Cai, Y. Xu, Y. J. Xiao, P. P. Zhang, J. S. Deng, L. Lan, X. M. Lu, R. S. Zhang, Z. H. Yao (NAOC), J. Zhang, L. J. Dan, G. Y. Zou, C. J. Wang, Y. F. Du, C. Huang (XIOPM) SVOM JSWG: Jian-Yan Wei (NAOC), Bertrand Cordier (CEA), Shuang-Nan Zhang (IHEP), Stéphane Basa (LAM), Arnaud Claret (CEA), Zi-Gao Dai (USTC), Frédéric Daigne (IAP), Jin-Song Deng (NAOC), Olivier Godet (IRAP), Andrea Goldwurm (APC), Diego Götz (CEA), Xu-Hui Han (NAOC), Cyril Lachaud (APC), En-Wei Liang (GXU), Yu-Lei Qiu (NAOC), Susanna Vergani (Obs.Paris), Jing Wang (NAOC), Chao Wu (NAOC), Li-Ping Xin (NAOC), Shao-Lin Xiong (IHEP), Bing Zhang (UNLV) report on behalf of the SVOM team: The SVOM/VT conducted a ToO follow-up observations of EP250109a triggered by EP-WXT(Li et al., GCN 38864) in VT_B (400nm-650nm) and VT_R (650nm-1000nm) channel simultaneously, from 4.13 hours to 4.80 hours after the burst. An uncatalogued source was detected within the errorbox of FXT (Li et al.,GCN 38864) in VT_R stacked image, compared to the Pan-STARRS catalog. This source is the only one source within the error box. The brightness of the source was estimated to be VT_R=22.34+/-0.15 in AB magnitude at the mid time of 4.47 hours post the burst, with a total exposure time of 38*100 seconds. The source was not detected in VT_B stacked image down to a 3 sigma upper limit of 23.6 mag with a total exposure time of 21*100 sec. The source is located at RA, Dec = 88.80672, -12.49599 deg, which is equivalent to: RA (J2000) : 05:55:13.61 Dec (J2000): -12:29:45.6 with an uncertainty of 0.5 arcsec. We are waiting for more data to confirm the fading of the source. The Space Variable Objects Monitor (SVOM) is a China-France joint mission led by the Chinese National Space Administration (CNSA, China), National Center for Space Studies (CNES, France) and the Chinese Academy of Sciences (CAS, China), which is dedicated to observing gamma-ray bursts and other transient phenomena in the energetic universe. VT was jointly developed by Xi'an Institute of Optics and Precision Mechanics (XIOPM), CAS and National astronomical observatories (NAOC),CAS. View this GCN Circular online at https://gcn.nasa.gov/circulars/38872. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 36878] EP250109a: Global MASTER-Net observations report
by GCN Circulars 09 Jan '25

09 Jan '25

TITLE: GCN CIRCULAR NUMBER: 38871 SUBJECT: EP250109a: Global MASTER-Net observations report DATE: 25/01/09 13:10:18 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-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) was pointed to the EP250109a ( EP Team et al., GCN 38864) errorbox 10841 sec after notice time and 22040 sec after trigger time at 2025-01-09 12:25:18 UT, with upper limit up to 16.2 mag. The observations began at zenith distance = 77 deg. The sun altitude is -28.1 deg. The galactic latitude b = -18 deg., longitude l = 218 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2739026 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 22049 | 2025-01-09 12:25:18 | MASTER-Tunka | (05h 55m 17.63s , -12d 32m 20.4s) | C | 15 | 15.5 | 22083 | 2025-01-09 12:25:53 | MASTER-Tunka | (05h 55m 17.99s , -12d 31m 16.2s) | C | 15 | 15.4 | 22112 | 2025-01-09 12:26:21 | MASTER-Tunka | (05h 55m 24.27s , -12d 32m 15.0s) | C | 15 | 15.4 | 22139 | 2025-01-09 12:26:48 | MASTER-Tunka | (05h 55m 19.06s , -12d 33m 13.7s) | C | 15 | 14.9 | 22165 | 2025-01-09 12:27:15 | MASTER-Tunka | (05h 55m 24.58s , -12d 32m 56.1s) | C | 15 | 14.9 | 22191 | 2025-01-09 12:27:41 | MASTER-Tunka | (05h 55m 21.14s , -12d 31m 40.0s) | C | 15 | 14.8 | 22503 | 2025-01-09 12:32:57 | MASTER-Tunka | (05h 55m 20.91s , -12d 32m 45.4s) | C | 5 | 15.5 | 22522 | 2025-01-09 12:33:16 | MASTER-Tunka | (05h 55m 24.47s , -12d 31m 13.3s) | C | 5 | 15.4 | 22540 | 2025-01-09 12:33:33 | MASTER-Tunka | (05h 55m 17.12s , -12d 31m 49.4s) | C | 8 | 15.3 | 22560 | 2025-01-09 12:33:53 | MASTER-Tunka | (05h 55m 18.59s , -12d 30m 47.9s) | C | 8 | 15.3 | 22582 | 2025-01-09 12:34:16 | MASTER-Tunka | (05h 55m 23.95s , -12d 31m 47.5s) | C | 8 | 15.2 | 22604 | 2025-01-09 12:34:37 | MASTER-Tunka | (05h 55m 18.35s , -12d 32m 43.7s) | C | 8 | 15.2 | 22626 | 2025-01-09 12:35:00 | MASTER-Tunka | (05h 55m 23.61s , -12d 32m 10.6s) | C | 8 | 15.3 | 22648 | 2025-01-09 12:35:21 | MASTER-Tunka | (05h 55m 20.84s , -12d 31m 08.9s) | C | 8 | 14.8 | 22671 | 2025-01-09 12:35:43 | MASTER-Tunka | (05h 55m 20.86s , -12d 32m 22.5s) | C | 10 | 14.6 | 22694 | 2025-01-09 12:36:07 | MASTER-Tunka | (05h 55m 23.91s , -12d 31m 03.4s) | C | 10 | 14.3 | 22718 | 2025-01-09 12:36:30 | MASTER-Tunka | (05h 55m 18.05s , -12d 31m 34.6s) | C | 10 | 14.6 | 22741 | 2025-01-09 12:36:55 | MASTER-Tunka | (05h 55m 18.67s , -12d 30m 33.0s) | C | 5 | 14.6 | 22774 | 2025-01-09 12:37:28 | MASTER-Tunka | (05h 55m 23.56s , -12d 31m 31.8s) | C | 5 | 14.9 | 22794 | 2025-01-09 12:37:48 | MASTER-Tunka | (05h 55m 17.70s , -12d 32m 31.2s) | C | 5 | 15.0 | 22814 | 2025-01-09 12:38:07 | MASTER-Tunka | (05h 55m 24.18s , -12d 32m 28.8s) | C | 10 | 15.3 | 24449 | 2025-01-09 13:05:18 | MASTER-Tunka | (05h 55m 20.96s , -12d 29m 25.1s) | C | 15 | 16.2 | 24477 | 2025-01-09 13:05:46 | MASTER-Tunka | (05h 55m 20.83s , -12d 30m 45.1s) | C | 15 | 15.0 | 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/38871. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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