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[vsnet-grb-info 42348] EP260321a: uGMRT observations
by GCN Circulars 07 Apr '26

07 Apr '26

TITLE: GCN CIRCULAR NUMBER: 44227 SUBJECT: EP260321a: uGMRT observations DATE: 26/04/07 11:11:53 GMT FROM: Aishwarya L Thakur at INAF-IAPS, Rome <aishth(a)outlook.com> G. Gianfagna (INAF-IAPS), A. Balasubramanian (IIA), G. Bruni (INAF-IAPS), D. Eappachen (IIA), L. Piro, A. L. Thakur (INAF-IAPS), G.C. Anupama, D.K. Sahu, Aru Beri (IIA), Varun Bhalerao, Aditya Pawan Saikia (IITB) report: We observed the Fast X-ray Transient EP260321a (Huang et al, GCN 44068, GCN 44075) with the upgraded Giant Metrewave Radio Telescope (uGMRT). Observations were performed on March 26 2026 (at a mean epoch of ~5 days after the EP trigger) for a total of 2 hours in Band 5 under a joint allocation for programs 49_076 (PI Eappachen) and 49_114 (PI Gianfagna). Data were reduced and imaged with the SPAM pipeline. The final image rms in Band 5 is ~90 uJy/beam. We do not detect any radio emission at the position of the optical counterpart (Lipunov et al. GCN 44069, Lee et al. GCN 44070, Ma et al. GCN 44074, Aguilar-Ruiz et al. GCN 44076, Liang et al. GCN 44079, Aryan et al. GCN 44081, Tanvir et al. GCN 44082, Moran et al. GCN 44083, Ahumada et al. GCN 44084, Liu et al. GCN 44087, Sankar et al. GCN 44089, de Ugarte Postigo et al. GCN 44091, Xu et al. GCN 44092, Pankov et al. GCN 44103, Corcoran et al. GCN 44105, Rastinejad et al. GCN 44107, Gao et al. GCN 44110, He et al. GCN 44117, Zhang et al. GCN 44171). The three-sigma upper limit on the radio counterpart is thus 270 uJy/beam at 1.1 GHz. Additional uGMRT observations are planned. We thank the staff of the GMRT who made these observations possible. GMRT is run by the National Centre for Radio Astrophysics of the Tata Institute of Fundamental Research. View this GCN Circular online at https://gcn.nasa.gov/circulars/44227. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 42347] GRB 260407A: Fermi GBM Final Real-time Localization
by GCN Circulars 07 Apr '26

07 Apr '26

TITLE: GCN CIRCULAR NUMBER: 44226 SUBJECT: GRB 260407A: Fermi GBM Final Real-time Localization DATE: 26/04/07 09:21:29 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 09:11:07 UT on 7 Apr 2026, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 260407A (trigger 797245872.223582 / 260407383). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 71.4, Dec = 28.2 (J2000 degrees, equivalent to J2000 04h 45m, 28d 11'), with a statistical uncertainty of 2.1 degrees. The angle from the Fermi LAT boresight is 61.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260407383/… The HEALPix FITS file, including the estimated localization systematic, can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260407383/… The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260407383/… View this GCN Circular online at https://gcn.nasa.gov/circulars/44226. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 42346] EP260405a: GMOS-N optical upper limits
by GCN Circulars 06 Apr '26

06 Apr '26

TITLE: GCN CIRCULAR NUMBER: 44225 SUBJECT: EP260405a: GMOS-N optical upper limits DATE: 26/04/06 19:38:45 GMT FROM: javisansie(a)gmail.com J. Sanchez-Sierras (Radboud), A. J. Levan (Radboud), A. Martin-Carrillo (UCD), J. Quirola-Vasquez (Radboud), D. B. Malesani (DAWN/NBI and Radboud), P. G. Jonker (Radboud), F. E. Bauer (SSI and UTA), J. Chácon (PUC) report on behalf of a larger collaboration: We observed the field of the Einstein Probe trigger EP260405a (Li et al. 2026, GCN 44222) using the GMOS-N instrument mounted on the Gemini-North telescope. Two observation epochs were obtained, on 2026-04-05 12:13:28 (~8.45 hours after T0) and 2026-04-06 07:15:39 (~27.49 hours after T0), in the z band (4x90 s) and r band (4x90 s). We carried out image subtraction in the z band using the second GMOS epoch as a template. The subtractions were performed using the ZOGY algorithm (Zackay et al. 2016), as implemented in PyZOGY (Guevel et al. 2021). We do not find any new, uncatalogued sources within the EP-WXT uncertainty region. From the stacked images we obtain the following 3-sigma upper limit: r > 24.98 z > 24.96 These limits are in the AB system, were calibrated using nearby stars from the Pan-STARRS catalog, and are not corrected for Galactic extinction. View this GCN Circular online at https://gcn.nasa.gov/circulars/44225. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 42345] EP260405a: SVOM/VT optical upper limits
by GCN Circulars 06 Apr '26

06 Apr '26

TITLE: GCN CIRCULAR NUMBER: 44224 SUBJECT: EP260405a: SVOM/VT optical upper limits DATE: 26/04/06 08:56:31 GMT FROM: Huali Li at at NAOC, SVOM <lhl(a)nao.cas.cn> H. L. Li, C. Wu, Y. L. Qiu, Y. N. Ma, Z. H. Yao, J. R. Xu, L. P. Xin, X. H. Han, J. Wang, Y. Xu, P. P. Zhang, W. J. Xie, Y. J. Xiao, H. B. Cai, J. S. Deng, J. Y. Wei (NAOC), J. Palmerio (CEA/Irfu) report on behalf of the SVOM/VT team. SVOM/VT performed ToO observations to the fast X-ray transient EP260405a triggered by Einstein Probe (Li et al., GCN 44222). The observation started at 2026-04-05T11:28:35 UTC, approximately 7.70 hours post trigger in the VT_B (400-650 nm) and VT_R (650-1000 nm) channels simultaneously. No uncatalogued sources were detected within the error box of EP-WXT (Li et al., GCN 44222), compared to the Legacy Survey. The measurements in AB magnitude are as follows: Mid time | Band | Exposure Time | 3 sigma upper limit 8.86 hr VT_B 107*50 sec > 23.7 mag 8.86 hr VT_R 105*50 sec > 23.6 mag Our photometry was not corrected for Galactic extinction. 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/44224. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 42344] EP260405a: Global MASTER-Net observations report
by GCN Circulars 06 Apr '26

06 Apr '26

TITLE: GCN CIRCULAR NUMBER: 44223 SUBJECT: EP260405a: Global MASTER-Net observations report DATE: 26/04/06 04:09:46 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov(a)xray.sai.msu.ru> V.Lipunov, E.Gorbovskoy, A.Kuznetsov, K.Zhirkov, I.Panchenko, N.Tiurina, P.Balanutsa, V.Topolev, D.Vlasenko, G.Antipov, A.Sankovich, Yu.Tselik, 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.Sosnovskij (CrAO), 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-OAFA robotic telescope [1] located in Argentina (OAFA observatory of San Juan National University) was pointed to the EP260405a ( EP Team et al., GCN 44222) errorbox 21911 sec after trigger time at 2026-04-05 09:51:38 UT, with upper limit up to 17.1 mag. Observations started at twilight. The observations began at zenith distance = 78 deg. The sun altitude is -12.9 deg. The galactic latitude b = 42 deg., longitude l = 293 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=3235319 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 21941 | 2026-04-05 09:51:38 | MASTER-OAFA | (12h 18m 08.46s , -19d 48m 02.5s) | C | 60 | 16.7 | 22001 | 2026-04-05 09:51:38 | MASTER-OAFA | (12h 18m 08.45s , -19d 48m 02.5s) | C | 180 | 17.1 | Coadd 22007 | 2026-04-05 09:52:43 | MASTER-OAFA | (12h 18m 08.49s , -19d 48m 02.4s) | C | 60 | 16.6 | 22072 | 2026-04-05 09:53:49 | MASTER-OAFA | (12h 18m 08.48s , -19d 48m 02.4s) | C | 60 | 16.5 | 22138 | 2026-04-05 09:54:55 | MASTER-OAFA | (12h 18m 08.55s , -19d 48m 02.6s) | C | 60 | 16.5 | 22198 | 2026-04-05 09:54:55 | MASTER-OAFA | (12h 18m 08.55s , -19d 48m 02.7s) | C | 180 | 16.6 | Coadd 22204 | 2026-04-05 09:56:00 | MASTER-OAFA | (12h 18m 08.56s , -19d 48m 02.5s) | C | 60 | 16.4 | 22270 | 2026-04-05 09:57:06 | MASTER-OAFA | (12h 18m 08.63s , -19d 48m 02.7s) | C | 60 | 16.2 | 22337 | 2026-04-05 09:58:13 | MASTER-OAFA | (12h 18m 08.72s , -19d 48m 03.5s) | C | 60 | 16.0 | 22397 | 2026-04-05 09:58:13 | MASTER-OAFA | (12h 18m 08.72s , -19d 48m 03.6s) | C | 180 | 16.3 | Coadd 22402 | 2026-04-05 09:59:18 | MASTER-OAFA | (12h 18m 08.73s , -19d 48m 03.4s) | C | 60 | 16.0 | 22467 | 2026-04-05 10:00:24 | MASTER-OAFA | (12h 18m 08.80s , -19d 48m 03.7s) | C | 60 | 15.8 | 22533 | 2026-04-05 10:01:30 | MASTER-OAFA | (12h 18m 08.89s , -19d 48m 03.9s) | C | 60 | 15.7 | 22599 | 2026-04-05 10:02:35 | MASTER-OAFA | (12h 18m 08.96s , -19d 48m 04.3s) | C | 60 | 15.5 | 22665 | 2026-04-05 10:03:41 | MASTER-OAFA | (12h 18m 09.09s , -19d 48m 04.8s) | C | 60 | 15.3 | 50605 | 2026-04-05 17:48:21 | MASTER- | (12h 17m 45.04s , -19d 54m 07.3s) | C | 180 | 16.3 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited. [1] - V.M. Lipunov, V.G. Kornilov, E.S. Gorbovskoy, N.A. Tiurina & A.S.Kuznetsov, 2023, Astronomical Robotic Networks and Operative Multichanel Astrophysics, Lomonosov MSU PRESS, 591pp. http : // www.pereplet.ru/lipunov/625.html View this GCN Circular online at https://gcn.nasa.gov/circulars/44223. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 42343] EP260405a: Einstein Probe detection of a fast X-ray transient
by GCN Circulars 06 Apr '26

06 Apr '26

TITLE: GCN CIRCULAR NUMBER: 44222 SUBJECT: EP260405a: Einstein Probe detection of a fast X-ray transient DATE: 26/04/06 04:04:37 GMT FROM: EP Team at NAOC/CAS <ep_ta(a)bao.ac.cn> R.-Z. Li (YNAO), Y. J. Yi (BNU), H.Q. Cheng and Z.-X. Ling (NAOC) on behalf of the Einstein Probe (EP) team: We report on the detection of a fast X-ray transient, designated EP260405a by the Wide-field X-ray Telescope (WXT) on the Einstein Probe (EP) mission (EP/WXT trigger ID: 11900672904), and followed by COLIBRI (Lincetto et al. GCN #44220). The X-ray flare started at T0 = 2026-04-05T03:46:27 (UTC) with a duration of about 150s. The WXT position of the source is R.A. = 184.423 deg, DEC = -20.156 deg (J2000) with an uncertainty of 3 arcmin in radius (90% C.L. statistical and systematic). The WXT spectrum can be fitted by an absorbed powerlaw model with a fixed Galactic column density of 4.83 x 10^20 cm^-2, and a photon index of 2.0 (-0.4, +0.4). The 0.5-4 keV unabsorbed flux is 4.2 (-0.9, +1.2) x 10^-10 erg/cm^2/s. A follow-up observation with the Follow-up X-ray Telescope (FXT) was conducted, beginning at 2026-04-05T16:23:25 (UTC) with an exposure time of 3ks. Within the EP/WXT error circle, no significant X-ray source was detected in the EP/FXT data, yielding an upper limit of 5 x 10^-14 erg/cm^2/s (90% C.L.). 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). View this GCN Circular online at https://gcn.nasa.gov/circulars/44222. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 42342] The EP-WXT trigger 01709259621 is likely a flaring star
by GCN Circulars 06 Apr '26

06 Apr '26

TITLE: GCN CIRCULAR NUMBER: 44221 SUBJECT: The EP-WXT trigger 01709259621 is likely a flaring star DATE: 26/04/06 02:18:37 GMT FROM: EP Team at NAOC/CAS <ep_ta(a)bao.ac.cn> Tian-Yu Liu, R.H. Yao, Chen Wang and C.C. Jin (NAOC) on behalf of the Einstein Probe (EP) team: The EP-WXT trigger 01709259621 at the time of 2026-04-05T 22:38:24, is likely a stellar flare associated with LP 368-99. The estimated flux of the flare is around 1e-10 erg/s/cm^2 in 0.5-4.0 keV, corresponding to an X-ray luminosity of around 1.27e31 erg/s. 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). View this GCN Circular online at https://gcn.nasa.gov/circulars/44221. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 42341] EP260405.149 / EP-WXT 11900672904: COLIBRÍ optical upper limits
by GCN Circulars 05 Apr '26

05 Apr '26

TITLE: GCN CIRCULAR NUMBER: 44220 SUBJECT: EP260405.149 / EP-WXT 11900672904: COLIBRÍ optical upper limits DATE: 26/04/05 16:04:19 GMT FROM: Massimiliano Lincetto at Aix Marseille Univ, CNRS/IN2P3, CPPM <lincetto(a)cppm.in2p3.fr> Massimiliano Lincetto (CPPM), Alan M. Watson (UNAM), Jean-Grégoire Ducoin (CPPM), Stéphane Basa (UAR Pytheas), William H. Lee (UNAM), Edilberto Aguilar-Ruiz (UNAM), Jean-Luc Atteia (IRAP), Camila Angulo (UNAM), Dalya Akl (NYUAD), Sarah Antier (IJCLAB), Rosa L. Becerra (UNAM), Nathaniel R. Butler (ASU), Damien Dornic (CPPM), Francis Fortin (IRAP), Leonardo García García (UNAM), Ramandeep Gill (UNAM), Noémie Globus (UNAM), Marion Guelfand (CPPM), Asuka Kuwata (UNAM), Nikos Mandarakas (LAM), Diego López-Cámara (UNAM), Francesco Magnani (CPPM), Enrique Moreno Méndez (UNAM), Margarita Pereyra (UNAM), Ny Avo Rakotondrainibe (LAM), Fredd Sánchez Álvarez (UNAM), Benjamin Schneider (LAM) and Antonio de Ugarte Postigo (LAM) report: We imaged the field of the EP-WXT transient EP260405.149 using the DDRAGO two-channel wide-field imager on the COLIBRÍ telescope. Observation started within 30 seconds from the alert reception. We observed on 2026-04-05 from 09:51:17 to 10:30:32 UTC (from 6.25 to 7 hours after the trigger T0) and obtained 1920 seconds of simultaneous exposure in the r and z filters. The data were reduced and co-added with the COLIBRÍ pipeline and analysed with STDWeb/STDPipe (Karpov 2025). The photometry was calibrated using nearby stars from the PanSTARRS DR2 catalog, is in the AB system, and is not corrected for Galactic extinction. In the stacked image, we do not detect any new source at the WXT source position down to the following 3-sigma limit: r > 21.11 z > 20.57 Further observations may be planned. We thank the staff of the Observatorio Astronómico Nacional at Sierra de San Pedro Mártir, as well as the technical and engineering teams at CEA, CPPM, IRAP, LAM, OHP, OSU Pytheas, and UNAM. COLIBRÍ is an astronomical observatory developed and operated jointly by France (AMU, CNES and CNRS) and Mexico (UNAM and SECIHTI). It is located at the Observatorio Astronómico Nacional on the Sierra de San Pedro Mártir, Baja California, Mexico. View this GCN Circular online at https://gcn.nasa.gov/circulars/44220. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 42340] The EP-WXT trigger 01709259615 is likely a flaring star
by GCN Circulars 05 Apr '26

05 Apr '26

TITLE: GCN CIRCULAR NUMBER: 44219 SUBJECT: The EP-WXT trigger 01709259615 is likely a flaring star DATE: 26/04/05 12:27:55 GMT FROM: EP Team at NAOC/CAS <ep_ta(a)bao.ac.cn> R.-Z. Li (YNAO), Y. J. Yi (BNU), H.Q. Cheng and Z.-X. Ling (NAOC) on behalf of the Einstein Probe (EP) team: The EP-WXT trigger 01709259615 at the time of 2026-04-05T12:01:49, is likely a stellar flare associated with RX J1411.0+0751. The estimated flux of the flare is around 1e-10 erg/s/cm^2 in 0.5-4.0 keV, corresponding to an X-ray luminosity of around 1.4e31 erg/s. 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). View this GCN Circular online at https://gcn.nasa.gov/circulars/44219. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 42339] Fermi trigger No 797039833: Global MASTER-Net observations report
by GCN Circulars 05 Apr '26

05 Apr '26

TITLE: GCN CIRCULAR NUMBER: 44218 SUBJECT: Fermi trigger No 797039833: Global MASTER-Net observations report DATE: 26/04/05 11:00:42 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov(a)xray.sai.msu.ru> V.Lipunov, E.Gorbovskoy, A.Kuznetsov, K.Zhirkov, I.Panchenko, N.Tiurina, P.Balanutsa, V.Topolev, D.Vlasenko, G.Antipov, A.Sankovich, Yu.Tselik, 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.Sosnovskij (CrAO), 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-OAFA robotic telescope [1] located in Argentina (OAFA observatory of San Juan National University) started inspect of the Fermi GRB260404.99 (trigger No 797039833,12h 09m 43.20s , -35d 10m 48.0s, R=16.55) errorbox 21767 sec after notice time and 21798 sec after trigger time at 2026-04-05 06:00:27 UT, with upper limit up to 19.5 mag. The observations began at zenith distance = 19 deg. The sun altitude is -58.3 deg. The galactic latitude b = 27 deg., longitude l = 294 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=3232826 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 21859 | 2026-04-05 06:00:27 | MASTER-OAFA | (12h 59m 32.15s , -41d 01m 29.5s) | C | 120 | 18.4 | 23083 | 2026-04-05 06:21:21 | MASTER-OAFA | (12h 37m 40.74s , -42d 05m 50.7s) | C | 60 | 17.6 | 23143 | 2026-04-05 06:21:21 | MASTER-OAFA | (12h 37m 40.75s , -42d 05m 50.7s) | C | 180 | 18.7 | Coadd 23163 | 2026-04-05 06:22:42 | MASTER-OAFA | (12h 48m 26.86s , -42d 07m 29.9s) | C | 60 | 17.5 | 23240 | 2026-04-05 06:23:58 | MASTER-OAFA | (12h 37m 42.77s , -42d 05m 40.4s) | C | 60 | 18.3 | 23334 | 2026-04-05 06:25:32 | MASTER-OAFA | (12h 48m 27.14s , -42d 06m 12.0s) | C | 60 | 19.2 | 23409 | 2026-04-05 06:26:48 | MASTER-OAFA | (12h 37m 39.06s , -42d 07m 24.1s) | C | 60 | 19.1 | 23525 | 2026-04-05 06:28:43 | MASTER-OAFA | (12h 35m 41.78s , -40d 12m 31.0s) | C | 60 | 18.5 | 23585 | 2026-04-05 06:28:43 | MASTER-OAFA | (12h 35m 41.77s , -40d 12m 31.0s) | C | 180 | 19.5 | Coadd 23600 | 2026-04-05 06:29:59 | MASTER-OAFA | (12h 46m 10.91s , -40d 11m 40.1s) | C | 60 | 19.2 | 23676 | 2026-04-05 06:31:14 | MASTER-OAFA | (12h 35m 48.78s , -40d 12m 30.1s) | C | 60 | 19.2 | 23761 | 2026-04-05 06:32:39 | MASTER-OAFA | (12h 46m 18.29s , -40d 12m 02.0s) | C | 60 | 19.1 | 23837 | 2026-04-05 06:33:55 | MASTER-OAFA | (12h 35m 41.12s , -40d 12m 28.9s) | C | 60 | 19.1 | 23932 | 2026-04-05 06:35:30 | MASTER-OAFA | (12h 49m 34.20s , -47d 48m 23.1s) | C | 60 | 19.1 | 24013 | 2026-04-05 06:36:51 | MASTER-OAFA | (13h 01m 25.31s , -47d 50m 17.4s) | C | 60 | 19.1 | 24089 | 2026-04-05 06:38:07 | MASTER-OAFA | (12h 49m 34.19s , -47d 49m 47.0s) | C | 60 | 19.1 | 35699 | 2026-04-05 09:51:38 | MASTER-OAFA | (12h 18m 08.46s , -19d 48m 02.5s) | C | 60 | 16.7 | 35759 | 2026-04-05 09:51:38 | MASTER-OAFA | (12h 18m 08.45s , -19d 48m 02.5s) | C | 180 | 17.1 | Coadd 35765 | 2026-04-05 09:52:43 | MASTER-OAFA | (12h 18m 08.49s , -19d 48m 02.4s) | C | 60 | 16.6 | 35830 | 2026-04-05 09:53:49 | MASTER-OAFA | (12h 18m 08.48s , -19d 48m 02.4s) | C | 60 | 16.5 | 35896 | 2026-04-05 09:54:55 | MASTER-OAFA | (12h 18m 08.55s , -19d 48m 02.6s) | C | 60 | 16.5 | 35956 | 2026-04-05 09:54:55 | MASTER-OAFA | (12h 18m 08.55s , -19d 48m 02.7s) | C | 180 | 16.6 | Coadd 35962 | 2026-04-05 09:56:00 | MASTER-OAFA | (12h 18m 08.56s , -19d 48m 02.5s) | C | 60 | 16.4 | 36028 | 2026-04-05 09:57:06 | MASTER-OAFA | (12h 18m 08.63s , -19d 48m 02.7s) | C | 60 | 16.2 | 36095 | 2026-04-05 09:58:13 | MASTER-OAFA | (12h 18m 08.72s , -19d 48m 03.5s) | C | 60 | 16.0 | 36155 | 2026-04-05 09:58:13 | MASTER-OAFA | (12h 18m 08.72s , -19d 48m 03.6s) | C | 180 | 16.3 | Coadd 36160 | 2026-04-05 09:59:18 | MASTER-OAFA | (12h 18m 08.73s , -19d 48m 03.4s) | C | 60 | 16.0 | 36225 | 2026-04-05 10:00:24 | MASTER-OAFA | (12h 18m 08.80s , -19d 48m 03.7s) | C | 60 | 15.8 | 36291 | 2026-04-05 10:01:30 | MASTER-OAFA | (12h 18m 08.89s , -19d 48m 03.9s) | C | 60 | 15.7 | 36357 | 2026-04-05 10:02:35 | MASTER-OAFA | (12h 18m 08.96s , -19d 48m 04.3s) | C | 60 | 15.5 | 36423 | 2026-04-05 10:03:41 | MASTER-OAFA | (12h 18m 09.09s , -19d 48m 04.8s) | C | 60 | 15.3 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited. [1] - V.M. Lipunov, V.G. Kornilov, E.S. Gorbovskoy, N.A. Tiurina & A.S.Kuznetsov, 2023, Astronomical Robotic Networks and Operative Multichanel Astrophysics, Lomonosov MSU PRESS, 591pp. http : // www.pereplet.ru/lipunov/625.html View this GCN Circular online at https://gcn.nasa.gov/circulars/44218. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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