June 2024 - vsnet-grb-info - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-grb-info 34605] EP240625a: EP-WXT detection of a fast X-ray transient
by GCN Circulars 25 Jun '24

25 Jun '24

TITLE: GCN CIRCULAR NUMBER: 36757 SUBJECT: EP240625a: EP-WXT detection of a fast X-ray transient DATE: 24/06/25 11:04:29 GMT FROM: EP Team at NAOC/CAS <ep_ta(a)bao.ac.cn> X. Pan, Z. Z. Lv (NAOC, CAS), Y. C. Fu (BNU), Y. Liu, Z. X. Ling, C. Zhang, C. C. Jin, W. Chen, H. Q. Cheng, C. Z. Cui, D. W. Fan, H. B. Hu, J. W. Hu, M. H. Huang, D. Y. Li, H. Y. Liu, M. J. Liu, T. Y. Lian, X. Mao, H. W. Pan, H. Sun, W. X. Wang, Y. L. Wang, Q. Y. Wu, X. P. Xu, Y. F. Xu, H. N. Yang, W. Yuan, M. Zhang, W. D. Zhang, W. J. Zhang, Z. Zhang, D. H. Zhao (NAOC, CAS), Y. Chen, S. M. Jia, S. N. Zhang (IHEP, CAS), E. Kuulkers, A. Santovincenzo (ESA), P. O'Brien (Univ. of Leicester), K. Nandra, A. Rau (MPE), B. Cordier (CEA) on behalf of the Einstein Probe team We report on the detection of a fast X-ray transient, designated EP240625a, by the Wide-field X-ray Telescope (WXT) on board the Einstein Probe (EP) mission. The transient triggered the WXT on-board processing unit at 2024-06-25T01:48:23 (UTC). The position of the source is R.A. = 310.760 deg, DEC = -15.966 deg (J2000) with an uncertainty of 2 arcmin in radius (90% C.L. statistical and systematic). The transient event lasts for approximately 300 seconds and has a peak unabsorbed flux of ~1.3 x 10^-9 erg/s/cm^2 in the 0.5-4 keV band. The average 0.5-4 keV spectrum can be fitted by an absorbed power law with a photon index of 1.8(+/-0.3) (with the column density fixed at the Galactic value of 3.85 x 10^20 cm^-2). The derived average unabsorbed 0.5-4 keV flux is 2.9(+0.7/-0.5) x 10^-10 erg/s/cm^2. The uncertainties are at the 1 sigma level for the above parameters. No previously known X-ray sources at a similar flux level are found within the 2 arcmin region around the source position. Following the WXT detection, we performed a follow-up observation with the Follow-up X-ray Telescope (FXT) on board the EP. Further follow-up observations are encouraged to identify the nature of this X-ray transient. The above observation was made with the WXT instrument during the commissioning phase of EP. 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/36757. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

1 0

[vsnet-grb-info 34604] GRB240624A: Fermi GBM Observation
by GCN Circulars 25 Jun '24

25 Jun '24

TITLE: GCN CIRCULAR NUMBER: 36756 SUBJECT: GRB240624A: Fermi GBM Observation DATE: 24/06/25 07:59:09 GMT FROM: Cuán de Barra at UCD <cuan.debarra(a)ucdconnect.ie> C. de Barra (UCD) and C. Meegan (UAH) report on behalf of the Fermi Gamma-ray Burst Monitor Team: "At 06:01:11.37 UT on 24 June 2024, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 240624A (trigger 740901676/240624251). which was also detected by Swift BAT (N. J. Klingler et al. 2024, GCN 36743). The Fermi GBM on-ground location is consistent with the Swift BAT position. The angle from the Fermi LAT boresight is 83 degrees. The GBM light curve consists of a single emission episode with a duration (T90) of about 2 s (50-300 keV). The time-averaged spectrum from T0-3.1 to T0+2.0 s is best fit by a power law function with an exponential high-energy cutoff. The power law index is -0.45 +/- 0.39 and the cutoff energy, parameterized as Epeak, is 90 +/- 13 keV. The event fluence (10-1000 keV) in this time interval is (7.0 +/- 0.8)E-07 erg/cm^2. The 64-ms peak photon flux measured starting from T0+0.38 s in the 10-1000 keV band is 6 +/- 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/36756. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

1 0

[vsnet-grb-info 34603] LIGO/Virgo/KAGRA S240622h: Upper limits from Swift/BAT-GUANO
by GCN Circulars 25 Jun '24

25 Jun '24

TITLE: GCN CIRCULAR NUMBER: 36755 SUBJECT: LIGO/Virgo/KAGRA S240622h: Upper limits from Swift/BAT-GUANO DATE: 24/06/25 02:49:36 GMT FROM: Samuele Ronchini at PSU <sjs8171(a)psu.edu> Samuele Ronchini (PSU), Gayathri Raman (PSU), Aaron Tohuvavohu (U Toronto), Jamie A. Kennea (PSU), James DeLaunay (PSU), Tyler Parsotan (NASA GSFC) report: Swift/BAT was observing >99% of the GW localization probability ([Bilby.multiorder.fits](https://gracedb.ligo.org/api/superevents/S240622h/fi…) at merger time. A fraction <1% of the GW localization posterior is contained inside the BAT coded FoV. The LVK notice, distributed in near real-time, triggered the Swift Mission Operations Center operated Gamma-ray Urgent Archiver for Novel Opportunities (GUANO; [Tohuvavohu et al. 2020, ApJ, 900, 1](https://iopscience.iop.org/article/10.3847/1538-4357/aba94f)). Upon trigger by this notice, GUANO sent a command to the Swift Burst Alert Telescope (BAT) to save 200 seconds of BAT event-mode data from [-50,+150] seconds around the time of the burst. All the requested event mode data was delivered to the ground. Using the NITRATES analysis ([DeLaunay + Tohuvavohu 2022, ApJ, 941, 169](https://iopscience.iop.org/article/10.3847/1538-4357/ac9d38)), we searched for emission on 8 timescales from 0.128s to 16.384s in the interval [-20,+20] seconds around the merger time. We find no evidence for a signal, and derive the following upper limits. We quote the 5-sigma flux upper limits in the 15-350 keV band, weighted over the GW localization, for four spectral templates (soft, normal, and hard GRB-like templates described in [arXiv:1612.02395], and spectral shape from GRB170817A [arXiv:1710.05446]) and for four time bins. In units of 10^-7 erg/s/cm^2: |time_bin (s) | soft|normal| hard | GRB170817 |-|-|-|-|-| |0.256 |20.8 | 13.3 | 11.7 | 14.9 |1.024 |10.6 | 6.78 | 5.98 | 7.61 |4.096 |5.74 | 3.66 | 3.23 | 4.11 |16.384 |3.60 | 2.30 | 2.02 | 2.57 The upper limits as function of sky position are plotted here, alongside the GW localization: [https://doi.org/10.5281/zenodo.12524835]() The solid and dashed lines indicate the 90% and 50% GW contour levels, respectively. The corresponding fits file is also included. GUANO is a fully autonomous, extremely low latency, spacecraft commanding pipeline designed for targeted recovery of BAT event mode data around the times of compelling astrophysical events to enable more sensitive GRB searches. A live reporting of Swift/BAT event data recovered by GUANO can be found at: [https://www.swift.psu.edu/guano/]() View this GCN Circular online at https://gcn.nasa.gov/circulars/36755. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

1 0

[vsnet-grb-info 34602] LIGO/Virgo/KAGRA S240621dy: Upper limits from Swift/BAT-GUANO
by GCN Circulars 25 Jun '24

25 Jun '24

TITLE: GCN CIRCULAR NUMBER: 36754 SUBJECT: LIGO/Virgo/KAGRA S240621dy: Upper limits from Swift/BAT-GUANO DATE: 24/06/25 02:49:31 GMT FROM: Samuele Ronchini at PSU <sjs8171(a)psu.edu> Samuele Ronchini (PSU), James DeLaunay (PSU), Aaron Tohuvavohu (U Toronto), Jamie A. Kennea (PSU), Gayathri Raman (PSU), Tyler Parsotan (NASA GSFC) report: Swift/BAT was observing >99% of the GW localization probability ([bayestar.multiorder.fits](https://gracedb.ligo.org/api/superevents/S240621d…) at merger time. A fraction <1% of the GW localization posterior is contained inside the BAT coded FoV. The LVK notice, distributed in near real-time, triggered the Swift Mission Operations Center operated Gamma-ray Urgent Archiver for Novel Opportunities (GUANO; [Tohuvavohu et al. 2020, ApJ, 900, 1](https://iopscience.iop.org/article/10.3847/1538-4357/aba94f)). Upon trigger by this notice, GUANO sent a command to the Swift Burst Alert Telescope (BAT) to save 200 seconds of BAT event-mode data from [-50,+150] seconds around the time of the burst. All the requested event mode data was delivered to the ground. Using the NITRATES analysis ([DeLaunay + Tohuvavohu 2022, ApJ, 941, 169](https://iopscience.iop.org/article/10.3847/1538-4357/ac9d38)), we searched for emission on 8 timescales from 0.128s to 16.384s in the interval [-20,+20] seconds around the merger time. We find no evidence for a signal, and derive the following upper limits. We quote the 5-sigma flux upper limits in the 15-350 keV band, weighted over the GW localization, for four spectral templates (soft, normal, and hard GRB-like templates described in [arXiv:1612.02395], and spectral shape from GRB170817A [arXiv:1710.05446]) and for four time bins. In units of 10^-7 erg/s/cm^2: |time_bin (s) | soft|normal| hard | GRB170817 |-|-|-|-|-| |0.256 |30.8 | 20.8 | 18.4 | 23.3 |1.024 |15.7 | 10.6 | 9.38 | 11.9 |4.096 |8.48 | 5.73 | 5.06 | 6.41 |16.384 |5.20 | 3.51 | 3.10 | 3.93 The upper limits as function of sky position are plotted here, alongside the GW localization: [https://doi.org/10.5281/zenodo.12519328]() The solid and dashed lines indicate the 90% and 50% GW contour levels, respectively. The corresponding fits file is also included. GUANO is a fully autonomous, extremely low latency, spacecraft commanding pipeline designed for targeted recovery of BAT event mode data around the times of compelling astrophysical events to enable more sensitive GRB searches. A live reporting of Swift/BAT event data recovered by GUANO can be found at: [https://www.swift.psu.edu/guano/]() View this GCN Circular online at https://gcn.nasa.gov/circulars/36754. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

1 0

[vsnet-grb-info 34601] LIGO/Virgo/KAGRA S240618ah: Upper limits from Swift/BAT-GUANO
by GCN Circulars 25 Jun '24

25 Jun '24

TITLE: GCN CIRCULAR NUMBER: 36753 SUBJECT: LIGO/Virgo/KAGRA S240618ah: Upper limits from Swift/BAT-GUANO DATE: 24/06/25 02:49:25 GMT FROM: Samuele Ronchini at PSU <sjs8171(a)psu.edu> Samuele Ronchini (PSU), Tyler Parsotan (NASA GSFC), Aaron Tohuvavohu (U Toronto), Jamie A. Kennea (PSU), James DeLaunay (PSU), Gayathri Raman (PSU) report: Swift/BAT was observing 53% of the GW localization probability ([bayestar.multiorder.fits](https://gracedb.ligo.org/api/superevents/S240618a…) at merger time. A fraction 14% of the GW localization posterior is contained inside the BAT coded FoV. The LVK notice, distributed in near real-time, triggered the Swift Mission Operations Center operated Gamma-ray Urgent Archiver for Novel Opportunities (GUANO; [Tohuvavohu et al. 2020, ApJ, 900, 1](https://iopscience.iop.org/article/10.3847/1538-4357/aba94f)). Upon trigger by this notice, GUANO sent a command to the Swift Burst Alert Telescope (BAT) to save 200 seconds of BAT event-mode data from [-50,+150] seconds around the time of the burst. All the requested event mode data was delivered to the ground. Using the NITRATES analysis ([DeLaunay + Tohuvavohu 2022, ApJ, 941, 169](https://iopscience.iop.org/article/10.3847/1538-4357/ac9d38)), we searched for emission on 8 timescales from 0.128s to 16.384s in the interval [-20,+20] seconds around the merger time. We find no evidence for a signal, and derive the following upper limits. We quote the 5-sigma flux upper limits in the 15-350 keV band, weighted over the GW localization, for four spectral templates (soft, normal, and hard GRB-like templates described in [arXiv:1612.02395], and spectral shape from GRB170817A [arXiv:1710.05446]) and for four time bins. In units of 10^-7 erg/s/cm^2: |time_bin (s) | soft|normal| hard | GRB170817 |-|-|-|-|-| |0.256 |6.68 | 5.16 | 4.83 | 5.49 |1.024 |3.42 | 2.64 | 2.47 | 2.81 |4.096 |1.85 | 1.42 | 1.33 | 1.52 |16.384 |1.16 | 0.90 | 0.84 | 0.95 The upper limits as function of sky position are plotted here, alongside the GW localization: [https://doi.org/10.5281/zenodo.12519163]() The solid and dashed lines indicate the 90% and 50% GW contour levels, respectively. The corresponding fits file is also included. GUANO is a fully autonomous, extremely low latency, spacecraft commanding pipeline designed for targeted recovery of BAT event mode data around the times of compelling astrophysical events to enable more sensitive GRB searches. A live reporting of Swift/BAT event data recovered by GUANO can be found at: [https://www.swift.psu.edu/guano/]() View this GCN Circular online at https://gcn.nasa.gov/circulars/36753. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

1 0

[vsnet-grb-info 34599] Swift GRB 240624A: Global MASTER-Net observations report
by GCN Circulars 25 Jun '24

25 Jun '24

TITLE: GCN CIRCULAR NUMBER: 36752 SUBJECT: Swift GRB 240624A: Global MASTER-Net observations report DATE: 24/06/25 02:27:06 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov(a)xray.sai.msu.ru> V. Lipunov, V.Kornilov, E. Gorbovskoy, K. Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, V.Senik, D. Vlasenko, G.Antipov, D.Zimnukhov, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D. Cheryasov, Ya.Kechin, Yu.Tselik, A. Sosnovskij (Lomonosov Moscow State University, SAI, Physics Department), R. Podesta, C.Lopez, F. Podesta, C.Francile (Observatorio Astronomico Felix Aguilar OAFA), R. Rebolo, M. Serra (The Instituto de Astrofisica de Canarias), D. Buckley (South African Astronomical Observatory), O.A. Gress, N.M. Budnev, O.Ershova (Irkutsk State University, API), L.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez (INAOE, Guillermo Haro Astrophysics Observatory), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), V. Yurkov, A. Gabovich (Blagoveschensk Educational State University) MASTER-SAAO robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in South Africa (South African Astronomical Observatory) was pointed to the Swift GRB 240624A ( N. J. Klingler et al., GCN 36743) errorbox 39782 sec after notice time and 39803 sec after trigger time at 2024-06-24 17:04:33 UT, with upper limit up to 15.4 mag. Observations started at twilight. The observations began at zenith distance = 84 deg. The sun altitude is -16.8 deg. The galactic latitude b = -3 deg., longitude l = 219 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2505317 We obtain a following upper limits. Tmid-T0 | Site |Filt.| Expt. | Limit| Comment _________|_____________________|_____|_______|______|________ 39893 | MASTER-SAAO | C | 180 | 15.4 | 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/36752. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

1 0

[vsnet-grb-info 34600] Fermi GRB 240624A: Global MASTER-Net observations report
by GCN Circulars 25 Jun '24

25 Jun '24

TITLE: GCN CIRCULAR NUMBER: 36750 SUBJECT: Fermi GRB 240624A: Global MASTER-Net observations report DATE: 24/06/25 02:27:05 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov(a)xray.sai.msu.ru> V. Lipunov, V.Kornilov, E. Gorbovskoy, K. Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, V.Senik, D. Vlasenko, G.Antipov, D.Zimnukhov, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D. Cheryasov, Ya.Kechin, Yu.Tselik, A. Sosnovskij (Lomonosov Moscow State University, SAI, Physics Department), R. Podesta, C.Lopez, F. Podesta, C.Francile (Observatorio Astronomico Felix Aguilar OAFA), R. Rebolo, M. Serra (The Instituto de Astrofisica de Canarias), D. Buckley (South African Astronomical Observatory), O.A. Gress, N.M. Budnev, O.Ershova (Irkutsk State University, API), L.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez (INAOE, Guillermo Haro Astrophysics Observatory), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), V. Yurkov, A. Gabovich (Blagoveschensk Educational State University) MASTER-SAAO robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in South Africa (South African Astronomical Observatory) started inspect of the Fermi GRB 240624A ( Fermi GBM team, GCN 36745) errorbox 39761 sec after notice time and 39801 sec after trigger time at 2024-06-24 17:04:33 UT, with upper limit up to 15.4 mag. Observations started at twilight. The observations began at zenith distance = 84 deg. The sun altitude is -16.8 deg. The galactic latitude b = 5 deg., longitude l = 228 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2505441 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 39892 | 2024-06-24 17:04:33 | MASTER-SAAO | (06h 49m 40.87s , -06d 32m 06.9s) | C | 180 | 15.4 | 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/36750. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

1 0

[vsnet-grb-info 34598] Fermi trigger No 740949590: Global MASTER-Net observations report
by GCN Circulars 25 Jun '24

25 Jun '24

TITLE: GCN CIRCULAR NUMBER: 36748 SUBJECT: Fermi trigger No 740949590: Global MASTER-Net observations report DATE: 24/06/25 02:27:05 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov(a)xray.sai.msu.ru> V. Lipunov, V.Kornilov, E. Gorbovskoy, K. Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, V.Senik, D. Vlasenko, G.Antipov, D.Zimnukhov, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D. Cheryasov, Ya.Kechin, Yu.Tselik, A. Sosnovskij (Lomonosov Moscow State University, SAI, Physics Department), R. Podesta, C.Lopez, F. Podesta, C.Francile (Observatorio Astronomico Felix Aguilar OAFA), R. Rebolo, M. Serra (The Instituto de Astrofisica de Canarias), D. Buckley (South African Astronomical Observatory), O.A. Gress, N.M. Budnev, O.Ershova (Irkutsk State University, API), L.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez (INAOE, Guillermo Haro Astrophysics Observatory), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), V. Yurkov, A. Gabovich (Blagoveschensk Educational State University) MASTER-Kislovodsk robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) started inspect of the Fermi GRB240624.81 (trigger No 740949590,16h 01m 57.60s , -07d 12m 36.0s, R=4.3) errorbox 106 sec after notice time and 140 sec after trigger time at 2024-06-24 19:22:05 UT, with upper limit up to 19.0 mag. The observations began at zenith distance = 49 deg. The sun altitude is -18.8 deg. MASTER-Tavrida robotic telescope located in Russia (Lomonosov MSU, SAI Crimea astronomical station) started inspect of the Fermi GRB240624.81 errorbox 110 sec after notice time and 144 sec after trigger time at 2024-06-24 19:22:09 UT, with upper limit up to 19.1 mag. Observations started at twilight. The observations began at zenith distance = 50 deg. The sun altitude is -15.1 deg. The galactic latitude b = 32 deg., longitude l = 4 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2506099 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 156 | 2024-06-24 19:22:05 | MASTER-Kislovodsk | (16h 02m 37.86s , -06d 14m 58.4s) | C | 30 | 17.4 | 201 | 2024-06-24 19:22:05 | MASTER-Kislovodsk | (16h 02m 37.86s , -06d 14m 58.4s) | C | 120 | 18.3 | Coadd 159 | 2024-06-24 19:22:09 | MASTER-Tavrida | (15h 58m 01.77s , -06d 17m 14.9s) | C | 30 | 18.1 | 205 | 2024-06-24 19:22:50 | MASTER-Tavrida | (15h 57m 55.72s , -06d 18m 17.1s) | C | 40 | 18.3 | 215 | 2024-06-24 19:23:00 | MASTER-Kislovodsk | (16h 02m 42.89s , -06d 14m 41.2s) | C | 40 | 17.6 | 263 | 2024-06-24 19:23:42 | MASTER-Tavrida | (15h 58m 01.91s , -06d 17m 53.1s) | C | 50 | 18.4 | 279 | 2024-06-24 19:23:59 | MASTER-Kislovodsk | (16h 02m 39.65s , -06d 13m 13.2s) | C | 50 | 17.8 | 327 | 2024-06-24 19:24:41 | MASTER-Tavrida | (15h 57m 59.82s , -06d 16m 42.2s) | C | 60 | 18.7 | 354 | 2024-06-24 19:25:09 | MASTER-Kislovodsk | (16h 02m 39.66s , -06d 14m 36.2s) | C | 60 | 18.0 | 648 | 2024-06-24 19:29:33 | MASTER-Tavrida | (15h 45m 44.69s , -07d 17m 46.4s) | C | 120 | 18.3 | 790 | 2024-06-24 19:31:45 | MASTER-Tavrida | (15h 45m 49.86s , -07d 17m 43.0s) | C | 140 | 18.7 | 957 | 2024-06-24 19:34:17 | MASTER-Tavrida | (15h 45m 47.40s , -07d 15m 55.9s) | C | 170 | 18.9 | 1143 | 2024-06-24 19:37:18 | MASTER-Tavrida | (15h 45m 47.40s , -07d 17m 50.5s) | C | 180 | 19.1 | 2367 | 2024-06-24 19:57:42 | MASTER-Kislovodsk | (16h 02m 44.21s , -07d 08m 10.0s) | C | 180 | 17.9 | 2376 | 2024-06-24 19:57:51 | MASTER-Tavrida | (15h 57m 56.33s , -07d 09m 45.5s) | C | 180 | 18.2 | 2566 | 2024-06-24 20:01:01 | MASTER-Kislovodsk | (16h 02m 38.37s , -07d 09m 18.1s) | C | 180 | 18.3 | 2746 | 2024-06-24 20:01:01 | MASTER-Kislovodsk | (16h 02m 38.36s , -07d 09m 18.2s) | C | 540 | 19.0 | Coadd 2569 | 2024-06-24 20:01:04 | MASTER-Tavrida | (15h 58m 02.32s , -07d 10m 53.6s) | C | 180 | 18.7 | 2758 | 2024-06-24 20:04:12 | MASTER-Tavrida | (15h 57m 55.92s , -07d 11m 56.3s) | C | 180 | 18.6 | 2766 | 2024-06-24 20:04:21 | MASTER-Kislovodsk | (16h 02m 45.37s , -07d 09m 07.1s) | C | 180 | 18.2 | 2949 | 2024-06-24 20:07:24 | MASTER-Tavrida | (15h 58m 03.17s , -07d 11m 42.0s) | C | 180 | 16.2 | 2966 | 2024-06-24 20:07:41 | MASTER-Kislovodsk | (16h 02m 41.55s , -07d 07m 40.7s) | C | 180 | 18.4 | 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/36748. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

1 0

[vsnet-grb-info 34597] GRB 240624B: Fermi GBM Final Real-time Localization
by GCN Circulars 25 Jun '24

25 Jun '24

TITLE: GCN CIRCULAR NUMBER: 36749 SUBJECT: GRB 240624B: Fermi GBM Final Real-time Localization DATE: 24/06/25 02:27:05 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 19:19:45 UT on 24 Jun 2024, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 240624B (trigger 740949590.263268 / 240624805). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 237.4, Dec = -7.3 (J2000 degrees, equivalent to J2000 15h 49m, -7d 17'), with a statistical uncertainty of 4.3 degrees. The angle from the Fermi LAT boresight is 58.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240624805/… The HEALPix FITS file, including the estimated localization systematic, can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240624805/… The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240624805/… View this GCN Circular online at https://gcn.nasa.gov/circulars/36749. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

1 0

[vsnet-grb-info 34596] LIGO/Virgo/KAGRA S240624cd: Retraction of GW unmodeled transient candidate
by GCN Circulars 25 Jun '24

25 Jun '24

TITLE: GCN CIRCULAR NUMBER: 36747 SUBJECT: LIGO/Virgo/KAGRA S240624cd: Retraction of GW unmodeled transient candidate DATE: 24/06/24 23:08:59 GMT FROM: hsiang-yu.huang(a)ligo.org The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration report: The trigger S240624cd is no longer considered to be a candidate of interest. The power in the strain channel was also witnessed in environmental monitors pointing to a data quality problem with the Livingston detector. The candidate found was not coherent between the Livingston and the Hanford detectors, and was not confirmed by similar burst pipeline analyses. View this GCN Circular online at https://gcn.nasa.gov/circulars/36747. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

1 0

2024

2023

2022

2021

vsnet-grb-info June 2024