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

[vsnet-grb-info 39326] IceCube-Cascade 250804A: Upper limits from a search for additional neutrino events in IceCube
by GCN Circulars 07 Aug '25

07 Aug '25

TITLE: GCN CIRCULAR NUMBER: 41269 SUBJECT: IceCube-Cascade 250804A: Upper limits from a search for additional neutrino events in IceCube DATE: 25/08/07 16:04:49 GMT FROM: Alicia Mand at IceCube/UW-Madison <aemand(a)wisc.edu> The IceCube Collaboration (http://icecube.wisc.edu/) reports: IceCube has performed a search [1] for additional track-like muon neutrino events arriving from the direction of IceCube-Cascade 250804A (https://gcn.nasa.gov/circulars/41235) in a time range of 1000 seconds centered on the alert event time (2025-08-04 07:50:12.960 UTC to 2025-08-04 08:06:52.960 UTC) during which IceCube was collecting good quality data. Excluding the event that prompted the alert, zero track-like events are found within the 90% containment region of IceCube-Cascade 250804A. We report a p-value of 1.00 in this time window. The IceCube sensitivity to neutrino point sources with an E^-2.5 spectrum (E^2 dN/dE at 1 TeV) within the locations spanned by the 90% spatial containment region of IceCube-Cascade 250804A ranges from 1.4e-01 to 1.7e+01 GeV cm^-2 in a 1000 second time window. 90% of events IceCube would detect from a source at this declination with an E^-2.5 spectrum have energies in the approximate energy range between 3e+02 GeV and 4e+06 GeV. A subsequent search was performed, including 2 days of data centered on the alert event time (2025-08-03 07:58:32.960 UTC to 2025-08-05 07:58:32.960 UTC). In this case, we report a p-value of 0.43, consistent with no significant excess of track events. The IceCube sensitivity to neutrino point sources with an E^-2.5 spectrum (E^2 dN/dE at 1 TeV) within the locations spanned by the 90% spatial containment region of IceCube-Cascade 250804A ranges from 1.6e-01 to 1.7e+01 GeV cm^-2 in a 2 day time window. The IceCube Neutrino Observatory is a cubic-kilometer neutrino detector operating at the geographic South Pole, Antarctica. The IceCube realtime alert point of contact can be reached at roc(a)icecube.wisc.edu. [1] IceCube Collaboration, R. Abbasi et al., ApJ 910 4 (2021) View this GCN Circular online at https://gcn.nasa.gov/circulars/41269. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

1 0

[vsnet-grb-info 39325] GRB 250807B: Swift detection of a burst with an optical counterpart.
by GCN Circulars 07 Aug '25

07 Aug '25

TITLE: GCN CIRCULAR NUMBER: 41268 SUBJECT: GRB 250807B: Swift detection of a burst with an optical counterpart. DATE: 25/08/07 15:59:34 GMT FROM: noelklin(a)umbc.edu N. J. Klingler (GSFC/UMBC/CRESSTII), R. Brivio (INAF-OAB), J. J. DeLaunay (PSU), S. Dichiara (PSU), R. Gupta (NASA GSFC), S. Lanava (PSU), M. J. Moss (GSFC), K. L. Page (U Leicester), D. M. Palmer (LANL), C. Salvaggio (INAF-OAB) and M. A. Williams (PSU) report on behalf of the Neil Gehrels Swift Observatory Team: At 15:43:07 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 250807B (trigger=1340561). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 15.585, -59.094 which is RA(J2000) = 01h 02m 21s Dec(J2000) = -59d 05' 37" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows complex activity during the slew that immediately preceded this trigger, with a total observed duration of about 100 sec. The peak count rate was ~1200 counts/sec (15-350 keV), at ~15 sec after the trigger. The XRT began observing the field at 15:45:32.3 UT, 144.5 seconds after the BAT trigger. XRT found a bright, uncatalogued X-ray source located at RA, Dec 15.6378, -59.1186 which is equivalent to: RA(J2000) = 01h 02m 33.07s Dec(J2000) = -59d 07' 07.0" with an uncertainty of 5.6 arcseconds (radius, 90% containment). This location is 131 arcseconds from the BAT onboard position, within the BAT error circle. No event data are yet available to determine the column density using X-ray spectroscopy. UVOT took a finding chart exposure of 150 seconds with the White filter starting 153 seconds after the BAT trigger. There is a candidate afterglow in the rapidly available 2.7'x2.7' sub-image at RA(J2000) = 01:02:32.98 = 15.63741 DEC(J2000) = -59:07:07.9 = -59.11887 with a 90%-confidence error radius of about 0.75 arc sec. This position is 1.2 arc sec. from the center of the XRT error circle. The estimated magnitude is 16.31 with a 1-sigma error of about 0.14. No correction has been made for the expected extinction corresponding to E(B-V) of 0.016. Burst Advocate for this burst is N. J. Klingler (noelklin AT umbc.edu). 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/41268. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

1 0

[vsnet-grb-info 39324] GRB 250805A: Kilonova-Catcher optical upper limits
by GCN Circulars 07 Aug '25

07 Aug '25

TITLE: GCN CIRCULAR NUMBER: 41267 SUBJECT: GRB 250805A: Kilonova-Catcher optical upper limits DATE: 25/08/07 15:27:58 GMT FROM: Damien Turpin at CEA-Saclay <dturpin-astro(a)hotmail.com> P. Jaquiery, R. Hellot (KNC), D. Turpin (CEA-Saclay/Irfu), C. Andrade(UMN), M. Pillas (ULiege), S. Antier (OCA/IJCLAB) on behalf of the GRANDMA/Kilonova-Catcher collaboration: We observed the field of GRB 250805A (Ambrosi et al., GCN 41233) detected by Swift/BAT with the GRANDMA citizen science project Kilonova-catcher (KNC). Our observations were performed with a Celestron C14 telescope located at Beverly-Begg Observatory and operated by P. Jaquiery and the CDK17 telescope located at AITP San Pedro Chile Observatory operated by R. Hellot. Our observations started at T0+1.2hr. In our stacked frames, subtracted from the Legacy Survey DR10 template image, we do not detect any optical counterpart inside the Swift/XRT position (Kennea et al., GCN 41234; Beardmore et al., GCN 41238) and at the position of the optical afterglow candidate reported by the VLT/X-shooter (Izzo et al., GCN 41241) and SVOM/VT (Li et al., GCN 41242) teams. We report our follow-up results in the table below: +---------------+-----------+------------+----------------------+-------------+ | Tmid-TGRB (hr)| Exp (s) | Filter | Magnitude | Instrument | +===============+===========+============+======================+=============+ | 1.9 | 28 x 120s | sdssr (AB) | 18.3 (U.L., 5 sigma) | C14-BBO | | 26.1 | 5 x 600s | sdssr (AB) | 19.5 (U.L., 5 sigma) | CDK17-AITP | +---------------+-----------+------------+----------------------+-------------+ These upper limits are compatible with the magnitudes and upper limits reported by (Liu et al., GCN 41236; Izzo et al., GCN 41241; Li et al., GCN 41242; Siegel et al., GCN 41265) All the data have been reduced by a single data processing pipeline, STDPipe (Karpov et al., 2022). Images obtained with the sloan filters were calibrated using the SkyMapper DR4 catalog. We use the SkyPortal application (skyportal.io) to monitor our observational campaign (Coughlin et al. 2023). GRANDMA is a worldwide telescope network (grandma.ijclab.in2p3.fr) devoted to the observation of transients in the context of multi-messenger astrophysics (Antier et al. 2020 MNRAS 497, 5518). Kilonova-Catcher (KNC) is the citizen science program of GRANDMA (http://kilonovacatcher.in2p3.fr/). View this GCN Circular online at https://gcn.nasa.gov/circulars/41267. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

1 0

[vsnet-grb-info 39323] EP250806a:SVOM/VT refined analysis
by GCN Circulars 07 Aug '25

07 Aug '25

TITLE: GCN CIRCULAR NUMBER: 41266 SUBJECT: EP250806a:SVOM/VT refined analysis DATE: 25/08/07 14:41:19 GMT FROM: Liping Xin at NAOC, SVOM <xlp(a)nao.cas.cn> L. P. Xin, H. L. Li, Y. N. Ma, Y. L. Qiu, C. Wu, Z. H. Yao, Y. Xu, J. Wang, P. P. Zhang, W. J. Xie, Y. J. Xiao, H. B. Cai, L. Lan, J. S. Deng, J. Y. Wei (NAOC), J. Palmerio (CEA) report on behalf of the SVOM/VT team. After the refined analysis, the candidate reported (Xin et al., GCN 41254) was a cataloged source in Legacy survey, not an uncatalogued source, as reported by Becerra et al., (GCN 41255). No any candidates were found in VT images within EP/FXT errorbox (Yang et al., GCN 41246; Liang et al., GCN 41256), the 3 sigma limit is about VT_B~23.6 mag and VT_R~23.1 mag in AB mag at 8.19 hours after the EP/WXT trigger. The results are consistent with the reports (Fortin et al. GCN 41248; Becerra et al., GCN 41255; Lipunov et al., GCN 41258; Kumar et al., GCN 41263). 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/41266. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

1 0

[vsnet-grb-info 39322] EP250806a: refined analysis of the EP-WXT and EP-FXT observations
by GCN Circulars 07 Aug '25

07 Aug '25

TITLE: GCN CIRCULAR NUMBER: 41256 SUBJECT: EP250806a: refined analysis of the EP-WXT and EP-FXT observations DATE: 25/08/07 04:42:31 GMT FROM: EP Team at NAOC/CAS <ep_ta(a)bao.ac.cn> R. D. Liang, H. N. Yang (NAO, CAS), Y. J. Zhang (THU), W. D. Zhang (NAO, CAS) report on behalf of the Einstein Probe team: The X-ray transient EP250806a was detected by the Wide-field X-ray Telescope (WXT) on board the Einstein Probe (EP) mission (Yang et al., GCN 41246). Refined analysis of the WXT data shows that the event started at T0=2025-08-06 09:17:30 (UTC) and lasted for about 50 s. The average WXT 0.5-4 keV spectrum can be fitted with an absorbed power law with a Galactic hydrogen column density of 1.47 x 10^20 cm^-2 and a photon index of 2.3 (-/+0.6). The derived average unabsorbed 0.5-4 keV flux is 4.1(-/+0.5) x 10^(-11) erg/s/cm^2. The Follow-up X-ray Telescope (FXT) on board EP observed this source autonomously about 150 s after T0. On-ground analysis of the FXT data found an uncatalogued source at R.A. = 335.1028, DEC = -26.8738 (J2000) with an uncertainty of about 10 arcsec (radius, 90% C.L. statistical and systematic), which is consistent positionally with the WXT transient. The average 0.5-10 keV spectrum can be fitted with an absorbed power law with a Galactic hydrogen column density of 1.47 x 10^20 cm^-2 and a photon index of 3.24 (-/+0.25). The derived average unabsorbed 0.5-10 keV flux is 8.42 (-/+0.47) x 10^(-13) erg/s/cm^2 during the time interval from 0 to 1000 seconds after the start of the observation. 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). View this GCN Circular online at https://gcn.nasa.gov/circulars/41256. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

1 0

[vsnet-grb-info 39321] GRB 250805A: Swift/UVOT Upper Limits
by GCN Circulars 07 Aug '25

07 Aug '25

TITLE: GCN CIRCULAR NUMBER: 41265 SUBJECT: GRB 250805A: Swift/UVOT Upper Limits DATE: 25/08/07 12:47:42 GMT FROM: Mike Siegel at PSU/Swift MOC <mhs18(a)psu.edu> M. H. Siegel (PSU) and Ambrosi (INAF-IASFPA) report on behalf of the Swift/UVOT team: The Swift/UVOT began settled observations of the field of GRB 250805A 3536 s after the BAT trigger (Ambrosi et al., GCN Circ. 41233). No optical afterglow consistent with the XRT position (Beardmore et al., GCN Circ. 41238) or optical afterglow (Izzo et al., GCN Circ. 41241; Li et al., GCN Circ. 41241) is detected in the initial UVOT exposures. Preliminary 3-sigma upper limits using the UVOT photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the first finding chart (FC) exposure and subsequent exposures are: Filter T_start(s) T_stop(s) Exp(s) Mag white_FC 3536 3686 147 >21.3 white 3536 4306 344 >21.7 b 3902 4101 197 >20.9 u 3696 3895 197 >20.6 w2 4312 4460 146 >20.7 The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.092 in the direction of the burst (Schlegel et al. 1998). View this GCN Circular online at https://gcn.nasa.gov/circulars/41265. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

1 0

[vsnet-grb-info 39320] GRB 250806A: Swift/UVOT U-band detection
by GCN Circulars 07 Aug '25

07 Aug '25

TITLE: GCN CIRCULAR NUMBER: 41264 SUBJECT: GRB 250806A: Swift/UVOT U-band detection DATE: 25/08/07 11:15:10 GMT FROM: Alice Breeveld at MSSL-UCL <a.breeveld(a)ucl.ac.uk> A.A. Breeveld (UCL-MSSL) and Paul Kuin (UCL-MSSL) report on behalf of the Swift/UVOT team: The Swift/UVOT began settled observations of the field of the SVOM/ECLAIRS detected burst GRB 250806A (Xie et al., GCN Circ. 41243) 354 s after the SVOM trigger. The X-ray afterglow reported by Campana et al. (GCN Circ. 41249) and Liang et al. (GCN Circ. 41260) is detected in the initial U-band exposure, but has faded in the later white band exposures. Preliminary magnitude and 3-sigma upper limit using the UVOT photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the initial exposures is: Filter T_start(s) T_stop(s) Exp(s) Mag u 354 1370 1000 20.5 ± 0.3 white 63123 64122 975 > 21.7 The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V)=0.044 in the direction of the burst (Schlegel et al. 1998). View this GCN Circular online at https://gcn.nasa.gov/circulars/41264. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

1 0

[vsnet-grb-info 39319] EP250806a: Liverpool telescope optical upper limit
by GCN Circulars 07 Aug '25

07 Aug '25

TITLE: GCN CIRCULAR NUMBER: 41263 SUBJECT: EP250806a: Liverpool telescope optical upper limit DATE: 25/08/07 11:08:34 GMT FROM: Amit Kumar at Royal Holloway - UoL/ U of Warwick, UK <amitkundu515(a)gmail.com> A. Kumar, J. R. Maund (RHUL), N. C. Sun (UCAS), W. X. Li, Y. N. Wang (NAOC), and K. Wiersema (Herts) report: We observed the field of EP/WXT triggered X-ray transient EP250806a (Yang et al., GCN 41246; Liang et al., GCN 41256) with the IO:O Imager at the 2m Liverpool telescope. We observed 360s x 2 frames in the g-band starting at 2025-08-07 UT 01:03:11 (~15.7 hours post-trigger). Preliminary photometry on the stacked image was performed and calibrated against the SDSS catalogue stars. We do not detect any source at the location of the SVOM/VT optical candidate of EP250806a (Xin et al., GCN 41254; Becerra et al., GCN 41255) down to a limiting g-band magnitude of >22.5 (AB). Reported magnitude is not extinction-corrected. View this GCN Circular online at https://gcn.nasa.gov/circulars/41263. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

1 0

[vsnet-grb-info 39318] GRB 250807A: Swift detection of a burst with an optical counterpart
by GCN Circulars 07 Aug '25

07 Aug '25

TITLE: GCN CIRCULAR NUMBER: 41262 SUBJECT: GRB 250807A: Swift detection of a burst with an optical counterpart DATE: 25/08/07 11:03:36 GMT FROM: noelklin(a)umbc.edu N. J. Klingler (GSFC/UMBC/CRESSTII), R. Brivio (INAF-OAB), J. J. DeLaunay (PSU), R. Gupta (NASA GSFC), J. A. Kennea (PSU), K. L. Page (U Leicester) and C. Salvaggio (INAF-OAB) report on behalf of the Neil Gehrels Swift Observatory Team: At 10:46:08.44 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 250807A (trigger=1340514). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 51.420, -47.877 which is RA(J2000) = 03h 25m 41s Dec(J2000) = -47d 52' 38" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a complex structure with a duration of about 80 sec. The peak count rate was ~19000 counts/sec (15-350 keV), at ~35 sec after the trigger. The XRT began observing the field at 10:47:49.5 UT, 101.1 seconds after the BAT trigger. XRT found a bright, uncatalogued X-ray source located at RA, Dec 51.4478, -47.8880 which is equivalent to: RA(J2000) = 03h 25m 47.47s Dec(J2000) = -47d 53' 16.8" with an uncertainty of 4.8 arcseconds (radius, 90% containment). This location is 77 arcseconds from the BAT onboard position, within the BAT error circle. No event data are yet available to determine the column density using X-ray spectroscopy. UVOT took a finding chart exposure of 150 seconds with the White filter starting 111 seconds after the BAT trigger. There is a candidate afterglow in the rapidly available 2.7'x2.7' sub-image at RA(J2000) = 03:25:47.59 = 51.44829 DEC(J2000) = -47:53:16.2 = -47.88782 with a 90%-confidence error radius of about 0.75 arc sec. This position is 1.3 arc sec. from the center of the XRT error circle. The estimated magnitude is 17.98 with a 1-sigma error of about 0.14. No correction has been made for the expected extinction corresponding to E(B-V) of 0.011. Burst Advocate for this burst is N. J. Klingler (noelklin AT umbc.edu). 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/41262. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

1 0

[vsnet-grb-info 39317] IceCube Alert 250804.84: Global MASTER-Net observations report
by GCN Circulars 07 Aug '25

07 Aug '25

TITLE: GCN CIRCULAR NUMBER: 41261 SUBJECT: IceCube Alert 250804.84: Global MASTER-Net observations report DATE: 25/08/07 10:39:22 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 (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Argentina (OAFA observatory of San Juan National University) was pointed to the IceCube Alert 250804.84 (trigger No 19914656,05h 18m 00.00s , +16d 39m 00.0s, R=0.7) errorbox 2 days 50708 sec after notice time and 2 days 50755 sec after trigger time at 2025-08-07 10:22:22 UT, with upper limit up to 18.3 mag. Observations started at twilight. The observations began at zenith distance = 58 deg. The sun altitude is -12.1 deg. The galactic latitude b = -11 deg., longitude l = 187 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2960236 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 223586 | 2025-08-07 10:22:22 | MASTER-OAFA | (05h 15m 58.59s , +15d 20m 12.5s) | C | 60 | 18.3 | 223646 | 2025-08-07 10:22:22 | MASTER-OAFA | (05h 15m 58.59s , +15d 20m 12.5s) | C | 180 | 18.1 | Coadd 223662 | 2025-08-07 10:23:38 | MASTER-OAFA | (05h 15m 57.44s , +15d 21m 13.0s) | C | 60 | 17.5 | 223737 | 2025-08-07 10:24:53 | MASTER-OAFA | (05h 16m 04.31s , +15d 20m 13.9s) | C | 60 | 15.5 | 223811 | 2025-08-07 10:26:07 | MASTER-OAFA | (05h 18m 10.03s , +16d 30m 57.3s) | C | 60 | 15.8 | 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/41261. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

1 0