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

[vsnet-grb-info 36418] GRB 241130A: EIRSAT-1 GMOD Detection
by GCN Circulars 02 Dec '24

02 Dec '24

TITLE: GCN CIRCULAR NUMBER: 38423 SUBJECT: GRB 241130A: EIRSAT-1 GMOD Detection DATE: 24/12/02 20:06:55 GMT FROM: Padraig McDermott at University College Dublin <padraig.mcdermott(a)ucdconnect.ie> P. McDermott, C. McKenna, D. Murphy, C. de Barra, A. Ulyanov, M. Doyle, R. Dunwoody, J. Mangan, G. Finneran, G. Corcoran, L. Cotter, A. Empey, J. Fisher, F. Gibson Kiely, J. Thompson, D. McKeown, A. Martin-Carrillo, L. Hanlon, S. McBreen, on behalf of the EIRSAT-1 team: EIRSAT-1 reports the detection of the long gamma-ray burst GRB241130A by the Gamma-ray Module (GMOD) instrument, which was also reported by Fermi GBM (GCN 38421 and 38406). The GMOD detection was made at 24-11-30 23:13:44.3 UTC. The GMOD light curve for GRB241130A, with 1.2s binning, shows a single peak. The spacecraft location at time of detection was 36.002 N, 21.890 W and an altitude of 453 km. The light curve for this event as measured by GMOD can be found here: https://grb.eirsat1.ie/241130A/241130A_LC_onboard_preliminary.png A bright FRED-like pulse can also be seen in the SPI-ACS ([Rau et al, Astronomy & Astrophysics, 438(3). 1175-1183. 2005](https://www.aanda.org/articles/aa/abs/2005/30/aa3159-05/aa3159-05.htm…) light curve at a consistent time (SPI-ACS data can be retrieved using the following [link](https://www.astro.unige.ch/mmoda/?DEC=-29.74516667&RA=265.97845833&T1=2024-11-30T23%3A10%3A00.000&T2=2024-11-30T23%3A20%3A00.000&T_format=isot&data_level=ordinary&instrument=spi_acs&product_type=spi_acs_lc&query_status=new&query_type=Real&selected_catalog=&src_name=1E+1740.7-2942&time_bin=0.2&time_bin_format=sec)). EIRSAT-1 is Ireland’s first satellite ([Doyle et al. Proceedings of the 4th SSEA, 2022](https://researchrepository.ucd.ie/bitstreams/2f3fdccb-6e36-4ac1-88cd-4e80feecf446/download)). It is a 2U CubeSat and carries onboard a number of experiments including the Gamma-Ray Module (GMOD), a novel, compact Gamma-ray detector ([Murphy et al, Experimental Astronomy, 53, 961–990, 2022](https://link.springer.com/article/10.1007/s10686-022-09842-z)). GMOD consists of a 25 mm × 25 mm × 40 mm Cerium Bromide scintillator coupled to SiPMs and is designed to detect gamma-ray bursts in the ~ 60 keV - 1.5 MeV range. EIRSAT-1 was developed in University College Dublin with support from ESA’s Fly Your Satellite! programme and was launched on 1st December 2023. View this GCN Circular online at https://gcn.nasa.gov/circulars/38423. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 36417] GRB 241128A: Swift/UVOT Upper Limits
by GCN Circulars 02 Dec '24

02 Dec '24

TITLE: GCN CIRCULAR NUMBER: 38422 SUBJECT: GRB 241128A: Swift/UVOT Upper Limits DATE: 24/12/02 19:11:35 GMT FROM: Sam Shilling at Lancaster University <shilling.sam(a)gmail.com> S.P.R. Shilling (Lancaster U.) and Brivio (INAF-OAB) report on behalf of the Swift/UVOT team: The Swift/UVOT began settled observations of the field of GRB 241128A 3880 s after the BAT trigger (Brivio et al., GCN Circ. 38367). No optical afterglow consistent with the enhanced XRT position (Beardmore et al., GCN Circ. 38374) 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 3880 4029 147 >20.0 white 3880 4649 344 >20.6 v 4860 5059 197 >19.0 b 4244 4444 197 >19.7 u 4038 4238 197 >19.2 m2 5065 10054 534 >19.4 w2 4655 4855 197 >19.3 The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.067 in the direction of the burst (Schlegel et al. 1998). View this GCN Circular online at https://gcn.nasa.gov/circulars/38422. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 36416] GRB 241128A: Swift/UVOT Upper Limits
by GCN Circulars 02 Dec '24

02 Dec '24

TITLE: GCN CIRCULAR NUMBER: 38422 SUBJECT: GRB 241128A: Swift/UVOT Upper Limits DATE: 24/12/02 19:11:35 GMT FROM: Sam Shilling at Lancaster University <shilling.sam(a)gmail.com> S.P.R. Shilling (Lancaster U.) and Brivio (INAF-OAB) report on behalf of the Swift/UVOT team: The Swift/UVOT began settled observations of the field of GRB 241128A 3880 s after the BAT trigger (Brivio et al., GCN Circ. 38367). No optical afterglow consistent with the enhanced XRT position (Beardmore et al., GCN Circ. 38374) 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 3880 4029 147 >20.0 white 3880 4649 344 >20.6 v 4860 5059 197 >19.0 b 4244 4444 197 >19.7 u 4038 4238 197 >19.2 m2 5065 10054 534 >19.4 w2 4655 4855 197 >19.3 The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.067 in the direction of the burst (Schlegel et al. 1998). View this GCN Circular online at https://gcn.nasa.gov/circulars/38422. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 36415] GRB 241130A: Fermi GBM Detection
by GCN Circulars 02 Dec '24

02 Dec '24

TITLE: GCN CIRCULAR NUMBER: 38421 SUBJECT: GRB 241130A: Fermi GBM Detection DATE: 24/12/02 18:25:13 GMT FROM: Vidushi Sharma at NASA GSFC/UMBC <vidushi.sharma(a)nasa.gov> V Sharma (NASA GSFC/UMBC), O.J. Roberts (NASA/MSFC) and C. Meegan (UAH) report on behalf of the Fermi Gamma-ray Burst Monitor Team: "At 23:13:45.38 UT on 30 November 2024, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 241130A (trigger 754701230/241130968). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 100.29, Dec = -26.38 (J2000 degrees, equivalent to J2000 6h 41m, -26d 22'), with a statistical uncertainty of 1.00 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 95 degrees. The GBM light curve consists of a single emission episode with a duration (T90) of about 4.6 s (50-300 keV). The time-averaged spectrum from T0+0 to T0+4.544 s is best fit by a Band function with Epeak = 320 +/- 30 keV, alpha = -0.92 +/- 0.04, and beta = -2.04 +/- 0.07. The event fluence (10-1000 keV) in this time interval is (1.09 +/- 0.02)E-05 erg/cm^2. The 1-sec peak photon flux measured starting from T0+0.22 s in the 10-1000 keV band is 33.6 +/- 0.5 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/38421. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 36414] IceCube-241127A: Upper limits from a search for additional neutrino events in IceCube
by GCN Circulars 02 Dec '24

02 Dec '24

TITLE: GCN CIRCULAR NUMBER: 38420 SUBJECT: IceCube-241127A: Upper limits from a search for additional neutrino events in IceCube DATE: 24/12/02 17:19:50 GMT FROM: Jessie Thwaites at IceCube/U Wisc-Madison <thwaites(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-241127A (https://gcn.nasa.gov/circulars/38349) in a time range of 1000 seconds centered on the alert event time (2024-11-27 14:02:54.420 UTC to 2024-11-27 14:19:34.420 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-241127A. 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-241127A is 1.4e-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 1e+05 GeV. A subsequent search was performed including 2 days of data centered on the alert event time (2024-11-26 14:11:14.420 UTC to 2024-11-28 14:11:14.420 UTC). In this case, we report a p-value of 1.00, 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-241127A is 1.6e-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/38420. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 36413] GRB 241129A: Swift/BAT-GUANO localization skymap of a burst
by GCN Circulars 02 Dec '24

02 Dec '24

TITLE: GCN CIRCULAR NUMBER: 38419 SUBJECT: GRB 241129A: Swift/BAT-GUANO localization skymap of a burst DATE: 24/12/02 17:11:37 GMT FROM: Jimmy DeLaunay at Penn State <delauj2(a)gmail.com> James DeLaunay (PSU), Samuele Ronchini (PSU), Aaron Tohuvavohu (Caltech), Gayathri Raman (PSU), Jamie A. Kennea (PSU), Tyler Parsotan (NASA GSFC) report: Swift/BAT did not localize GRB 241129A onboard (T0: 2024-11-29T01:31:33.42 UTC, Fermi trig 754536698) The Fermi 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). 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. The BAT likelihood search, NITRATES (DeLaunay + Tohuvavohu 2022, ApJ, 941, 169), performed on the temporal window [T0-20 s, T0+20 s], detects the burst with a sqrt(TS) of 10.58 in a 16.384 s analysis time bin, starting at T0 - 4.096 s. Using the NITRATES analysis, parameter estimation was performed to obtain the localization of this burst in the form of a HEALPIX Multi-Order Coverage (MOC) skymap. This localization accounts for both statistical and systematic errors. More details in the creation and calibration of these maps will soon be published (DeLaunay et al. 2024. in prep) The 90% credible area is 411 deg2 and the 50% credible area is 96 deg2. The integrated probability inside the coded field of view is <1%. The NITRATES skymap is consistent with the Fermi localization reported in the final position notice (GCN 38375). The combined Fermi/GBM+NITRATES 90% credible area is 145 deg2 and the 50% credible area is 45 deg2. A plot of the probability skymap can be viewed here: [skymap_plot](https://guano.swift.psu.edu/trigger_report?id=754536728/#:~:te… The probability skymap file can be downloaded from the link here [skymap_fits_file](https://guano.swift.psu.edu/files/754536728/0_n_PROBMAP) Instructions on how to read and manipulate this map can be found here: https://guano.swift.psu.edu/documentation More details about this burst can be found on the trigger report page here: https://guano.swift.psu.edu/trigger_report?id=754536728 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/38419. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 36412] EP241201a: Kinder optical counterpart candidate
by GCN Circulars 02 Dec '24

02 Dec '24

TITLE: GCN CIRCULAR NUMBER: 38418 SUBJECT: EP241201a: Kinder optical counterpart candidate DATE: 24/12/02 15:45:07 GMT FROM: Janet Chen at National Central University <janetstars(a)gmail.com> M.-H. Lee (NCU), S. Yang (HNAS), A. Aryan, T.-W. Chen, Y. J. Yang, W.-J. Hou (all NCU), S. J. Smartt (Oxford/QUB), A. K. H. Kong (NTHU), J. Gillanders (Oxford), C.-C. Ngeow, A. Sankar.K, Y.-H. Li, H.-Y. Miao, Y.-C. Pan, C.-H. Lai, H.-C. Lin, H.-Y. Hsiao, C.-S. Lin, J.-K. Guo (all NCU), Z. N. Wang, L. L. Fan, G. H. Sun (all HNAS), H.-W. Lin (UMich), H. F. Stevance, S. Srivastav, L. Rhodes (all Oxford), M. Nicholl, M. Fulton, T. Moore, K. W. Smith, C. Angus, A. Aamer (all QUB), A. Schultz and M. Huber (both IfA, Hawaii) report: We observed the field of the fast X-ray transient EP241201a (Chen et al., GCN 38415) using the 1m LOT at the Lulin Observatory in Taiwan as part of the Kinder collaboration (Chen & Yang et al., 2024 arXiv:2406.09270). The first LOT epoch of observations started at 10:25 UTC on 2nd December 2024 (MJD 60646.434), 13.40 hr after the EP-WXT trigger. We utilized the Kinder pipeline (Yang et al. A&A 646, A22) to stack the images and subtract them from the DESI Legacy Survey (Dey et al. 2019) DR10 template images. Although no definitive candidates were detected in the difference images, we conducted a manual inspection of both the target and difference images. During this process, we identified a plausible optical transient candidate at RA=18:50:38.079, Dec=+66:03:11.36, located approximately 2.28 arcminutes from the reported coordinates of EP241201a. Despite the low signal-to-noise ratio (SNR) of this candidate, we believe it to be real due to its well-defined Gaussian profile. The details of the observations and measured PSF magnitude with template subtraction (in the AB system) of the possible counterpart of EP241201a are as follows: --------------------------------------------------------------------------------------------------Telescope | Filter | MJD (start) | t-t0 (hr) | Exposure (s) | Magnitude | avg. Seeing | med. Airmass LOT | r | 60646.434 | 13.40 | 300 * 6 | 22.69 +/- 0.41 | 1".43 | 2.06 The presented magnitude was calibrated using the field stars from the Pan-STARRS1 catalog (Chambers et al., 2016 arXiv:1612.05560) and was not corrected for the expected Galactic foreground extinction corresponding to a reddening of A_r = 0.13 mag in the direction of the transient (Schlafly & Finkbeiner 2011). We note an extended source in the Legacy Survey image 5".8 west and 3".8 south from the plausible optical transient candidate, at RA=18:50:37.128, Dec=+66:03:07.56, is possibly its host galaxy, with r-band magnitude as 20.47 mag and photo-z = 0.313 +/- 0.056, the distance module is then 40.91. Assuming the r-band can be roughly K-corrected to the g-band, with the Milky Way extinction correction, the optical counterpart candidate has the rest-frame M_g = -18.35 mag. Further follow-up observations are encouraged to confirm this candidate, as it is beyond our 3-sigma detection limit of r > 21.6 mag. View this GCN Circular online at https://gcn.nasa.gov/circulars/38418. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 36411] EP241201a: Kinder optical counterpart candidate
by GCN Circulars 02 Dec '24

02 Dec '24

TITLE: GCN CIRCULAR NUMBER: 38418 SUBJECT: EP241201a: Kinder optical counterpart candidate DATE: 24/12/02 15:45:07 GMT FROM: Janet Chen at National Central University <janetstars(a)gmail.com> M.-H. Lee (NCU), S. Yang (HNAS), A. Aryan, T.-W. Chen, Y. J. Yang, W.-J. Hou (all NCU), S. J. Smartt (Oxford/QUB), A. K. H. Kong (NTHU), J. Gillanders (Oxford), C.-C. Ngeow, A. Sankar.K, Y.-H. Li, H.-Y. Miao, Y.-C. Pan, C.-H. Lai, H.-C. Lin, H.-Y. Hsiao, C.-S. Lin, J.-K. Guo (all NCU), Z. N. Wang, L. L. Fan, G. H. Sun (all HNAS), H.-W. Lin (UMich), H. F. Stevance, S. Srivastav, L. Rhodes (all Oxford), M. Nicholl, M. Fulton, T. Moore, K. W. Smith, C. Angus, A. Aamer (all QUB), A. Schultz and M. Huber (both IfA, Hawaii) report: We observed the field of the fast X-ray transient EP241201a (Chen et al., GCN 38415) using the 1m LOT at the Lulin Observatory in Taiwan as part of the Kinder collaboration (Chen & Yang et al., 2024 arXiv:2406.09270). The first LOT epoch of observations started at 10:25 UTC on 2nd December 2024 (MJD 60646.434), 13.40 hr after the EP-WXT trigger. We utilized the Kinder pipeline (Yang et al. A&A 646, A22) to stack the images and subtract them from the DESI Legacy Survey (Dey et al. 2019) DR10 template images. Although no definitive candidates were detected in the difference images, we conducted a manual inspection of both the target and difference images. During this process, we identified a plausible optical transient candidate at RA=18:50:38.079, Dec=+66:03:11.36, located approximately 2.28 arcminutes from the reported coordinates of EP241201a. Despite the low signal-to-noise ratio (SNR) of this candidate, we believe it to be real due to its well-defined Gaussian profile. The details of the observations and measured PSF magnitude with template subtraction (in the AB system) of the possible counterpart of EP241201a are as follows: --------------------------------------------------------------------------------------------------Telescope | Filter | MJD (start) | t-t0 (hr) | Exposure (s) | Magnitude | avg. Seeing | med. Airmass LOT | r | 60646.434 | 13.40 | 300 * 6 | 22.69 +/- 0.41 | 1".43 | 2.06 The presented magnitude was calibrated using the field stars from the Pan-STARRS1 catalog (Chambers et al., 2016 arXiv:1612.05560) and was not corrected for the expected Galactic foreground extinction corresponding to a reddening of A_r = 0.13 mag in the direction of the transient (Schlafly & Finkbeiner 2011). We note an extended source in the Legacy Survey image 5".8 west and 3".8 south from the plausible optical transient candidate, at RA=18:50:37.128, Dec=+66:03:07.56, is possibly its host galaxy, with r-band magnitude as 20.47 mag and photo-z = 0.313 +/- 0.056, the distance module is then 40.91. Assuming the r-band can be roughly K-corrected to the g-band, with the Milky Way extinction correction, the optical counterpart candidate has the rest-frame M_g = -18.35 mag. Further follow-up observations are encouraged to confirm this candidate, as it is beyond our 3-sigma detection limit of r > 21.6 mag. View this GCN Circular online at https://gcn.nasa.gov/circulars/38418. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 36410] LIGO/Virgo/KAGRA S241102br: GRAWITA wide-field optical observations
by GCN Circulars 02 Dec '24

02 Dec '24

TITLE: GCN CIRCULAR NUMBER: 38417 SUBJECT: LIGO/Virgo/KAGRA S241102br: GRAWITA wide-field optical observations DATE: 24/12/02 12:09:28 GMT FROM: Andrea Reguitti at INAF - Osservatorio Astronomico di Brera <andreareguitti(a)gmail.com> *A. Reguitti (INAF-OABr / INAF-OAPd), P. D’Avanzo (INAF-OAB), L. Tomasella (INAF-OAPd), Y. Hu (INAF-OABr), A. Rossi (INAF-OAS), E. Cappellaro (INAF-OAPd) et al. on behalf of the GRAWITA collaboration* We carried out optical follow-up observations of the well-localized LIGO/Virgo/KAGRA GW trigger S241102br (LVK Collaboration, GCN #38043) with the Schmidt telescope sited at the INAF Asiago observatory (Italy). Observations started on 2024-11-02 at 17:08 UT (~4.5 hours after the GW trigger) with the Sloan-r filter. We covered 12 square degrees within the 90% localisation region of the S241102br GW event, almost covering the totality of the final 7 deg2 50% localisation region. The 12 pointings of 1 square degree each are centered at J2000 celestial coordinates: (344.4023, 38.1139); (344.3944, 39.0544); (344.3862, 39.9948); (344.3775, 40.9352); (344.3684, 41.8757); (344.3589, 42.8161); (345.6411, 42.8161); (345.6316, 41.8757); (345.6225, 40.9352); (345.6138, 39.9948); (345.6056, 39.0544); (345.5977, 38.1139). These observations covered ~ 43% of the final 90% credible region (LVK Collaboration, GCN #38043). The typical 3 sigma limiting AB magnitudes are r ~ 21.1 mag. Preliminary analysis, which includes image subtraction with the template images from the PanSTARRS all-sky survey, shows no clear candidate counterparts. We carried out a specific search for transients in the galaxies located within the S241102br volume. We note that one of the NED galaxies (Cook et al. 2024, GCN #38044) at z = 0.08, a distance consistent with the estimation for the S241102br GW event (0.069<z<0.093), has been proposed in the past as the host galaxy of GRB 051109B (Perley et al. 2006, GCN #5387). We thank the staff at Padova Astronomical Observatory for their excellent support. View this GCN Circular online at https://gcn.nasa.gov/circulars/38417. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 36409] EP241201a: Global MASTER-Net observations report
by GCN Circulars 02 Dec '24

02 Dec '24

TITLE: GCN CIRCULAR NUMBER: 38416 SUBJECT: EP241201a: Global MASTER-Net observations report DATE: 24/12/02 10:27:31 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 EP241201a ( EP Team et al., GCN 38415) errorbox 10284 sec after notice time and 48020 sec after trigger time at 2024-12-02 10:21:42 UT, with upper limit up to 19.5 mag. Observations started at twilight. The observations began at zenith distance = 28 deg. The sun altitude is -11.8 deg. The galactic latitude b = 25 deg., longitude l = 96 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2692013 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 48028 | 2024-12-02 10:21:42 | MASTER-Tunka | (18h 51m 35.06s , +66d 13m 05.0s) | C | 15 | 19.0 | 48056 | 2024-12-02 10:22:09 | MASTER-Tunka | (18h 51m 34.90s , +66d 14m 05.6s) | C | 15 | 19.0 | 48091 | 2024-12-02 10:22:38 | MASTER-Tunka | (18h 51m 40.39s , +66d 13m 06.2s) | C | 30 | 19.5 | 48133 | 2024-12-02 10:23:20 | MASTER-Tunka | (18h 51m 35.74s , +66d 12m 06.9s) | C | 30 | 19.5 | 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/38416. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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