GRB241128A

This page lists all entries on GRB241128A in GRBweb

Summary IPN Swift GCN 38367 GCN 38368 GCN 38371 GCN 38372 GCN 38373 GCN 38374 GCN 38376 GCN 38380 GCN 38382 GCN 38383 GCN 38387 GCN 38395 GCN 38422 GCN 38432 GCN 38438 GCN 38519 GCN 39271

Summary table
Variable Value Source
T0 16:14:34 UTC GCN_circulars,Swift Det
ra 273.7238° Swift
decl 33.4391° Swift
pos_error 2.98e-04° Swift
T90 238.32 s Swift
T90_start 16:14:34 UTC Swift
fluence 1.10e-06 erg/cm² Swift
T100 238.32 s
GBM_located False
mjd 60642.676782407405 GCN_circulars,Swift Det
IPN table
GRB_name GRB241128A
ra 273.7250°
decl 33.4333°
pos_error 5.00e-02°
Swift table
GRB_name GRB241128A
t_trigger 16:14:34 UTC
ra 273.7238°
decl 33.4391°
pos_error 2.98e-04°
T90 238.32 s
fluence 1.10e-06 erg/cm²
GCN 38367 table
GRB_name GRB241128A
GCN_number 38367
Detection_method Swift Det
t_trigger 16:14:34 UTC
ra 273.7240°
decl 33.4350°
Circular_text TITLE: GCN CIRCULAR NUMBER: 38367 SUBJECT: GRB 241128A: Swift detection of a burst DATE: 24/11/28 16:37:44 GMT FROM: K.L. Page at U Leicester R. Brivio (INAF-OAB), M. Ferro (INAF-OAB), C. Gronwall (PSU), R. Gupta (NASA GSFC), A. Y. Lien (U Tampa), K. L. Page (U Leicester), D. M. Palmer (LANL), C. Salvaggio (INAF-OAB) and T. Sbarrato (INAF-OAB) report on behalf of the Neil Gehrels Swift Observatory Team: At 16:14:34 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 241128A (trigger=1270999). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 273.724, +33.435 which is RA(J2000) = 18h 14m 54s Dec(J2000) = +33d 26' 07" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). Although a telemetry gap prevented the download of a BAT lightcurve, the trigger duration of 4 s indicates that this is a long burst. The XRT began observing the field at 16:16:32.2 UT, 118.0 seconds after the BAT trigger. No source was detected in the 2.5-s promptly available image. We are waiting for the full dataset to detect and localise the XRT counterpart. There are no prompt UVOT data available at this time. Although this source has not been confirmed during the short XRT observation (truncated by entrance into the SAA) or by the non-availability of the BAT lightcurve, the strength of peak (8.4 sigma) in the BAT image indicates that this is an astrophysical source. Burst Advocate for this burst is R. Brivio (riccardo.brivio AT inaf.it). 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/)
GCN 38368 table
GRB_name GRB241128A
GCN_number 38368
Detection_method Swift-XRT Other
ra 273.7245°
decl 33.4385°
Circular_text TITLE: GCN CIRCULAR NUMBER: 38368 SUBJECT: GRB 241128A: Swift-XRT afterglow detection DATE: 24/11/28 18:34:25 GMT FROM: K.L. Page at U Leicester K.L. Page (U. Leicester) reports on behalf of the Swift-XRT team: Immediately following the BAT trigger on GRB 241128A, Swift entered the South Atlantic Anomaly, during which time no XRT data were taken. The field of the GRB became visible to the XRT at 17:16 UT, 3.9 ks after the trigger, at which point the XRT afterglow of the burst was detected at a position of RA, Dec = 273.72454, 33.43853 which is equivalent to: RA (J2000): 18:14:53.89 Dec(J2000): +33:26:18.9 with an uncertainty of 3.5 arcsec (radius, 90% confidence). This circular is an official product of the Swift-XRT team.
GCN 38371 table
GRB_name GRB241128A
GCN_number 38371
Detection_method Optical
ra 273.7231°
decl 33.4390°
Circular_text TITLE: GCN CIRCULAR NUMBER: 38371 SUBJECT: GRB 241128A: 1.5m OSN optical afterglow detection DATE: 24/11/28 21:15:38 GMT FROM: Youdong HU at INAF-OAB Y.-D. Hu (INAF-OAB), V. Casanova, E. Fernandez-Garcia, A. J. Castro-Tirado, S.-Y. Wu, I. Perez-Garcia, M.D. Caballero-Garcia, R. Sanchez-Ramirez, S. Guziy (IAA-CSIC) and G. Garcia-Segura (UNAM), on behalf of a larger collaboration, report: Following the detection of GRB 241128A by Swift (Brivio et al. GCN 38367), we triggered the 1.5m OSN telescope in Granada (Spain) starting on Nov 28, 18:19 UT (~2.1 hrs post burst) in R & I-bands. An uncatalogued object is detected within the XRT error circle (Page et al. GCNC 38368) with R=19.3+-0.1 mag, at coordinates RA(J2000) = 18:14:53.55, DEC(J2000) = +33:26:20.32, which we proposed as the GRB 241128A optical afterglow. Spectroscopic observations are encouraged. We thank the staff at OSN for their excellent support.
GCN 38372 table
GRB_name GRB241128A
GCN_number 38372
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 38372 SUBJECT: GRB 241128A: LCO optical detection DATE: 24/11/28 21:48:43 GMT FROM: luca.izzo@inaf.it L. Izzo (INAF-OACn and DARK/NBI), and D. B. Malesani (DAWN/NBI and Radboud Univ.) report: We observed the field of GRB 241128A (Brivio et al., GCN #38367) with the Sinistro instrument mounted on the 1-m telescope of the LCO network, located at the Teide Observatory, Spain. Observations started on 2024 November 28 at 19:04 UT (2.83 hr after the GRB trigger). We obtained a series of 3x300 s images in the SDSS-r filter. The afterglow reported by Hu et al. (GCN #38371; see also Page et al., GCN #38368) is well detected in our images. We measure a preliminary magnitude of r = 19.24 +/- 0.07 mag (AB), calibrated against nearby stars from the Pan-STARRS catalog. This project has received funding from the European Union's Horizon 2020 research and innovation program under grant agreement No 101004719.
GCN 38373 table
GRB_name GRB241128A
GCN_number 38373
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 38373 SUBJECT: GRB 241128A: NOT optical observations DATE: 24/11/28 22:59:25 GMT FROM: Daniele B. Malesani at IMAPP / Radboud University B. Gompertz (Birmingham), D. B. Malesani (DAWN/NBI and Radboud Univ.), L. Izzo (INAF/OACN, DARK/NBI), J. H. Terwel (NOT and TCD) report on behalf of a larger collaboration: We observed the field of GRB 241128A (Brivio et al., GCN 38367; Page, GCN 38368) using the Nordic Optical Telescope (NOT) equipped with the ALFOSC camera. Observations were carried out at large airmass and under a poor seeing of 2.5". A total of 3x300 s and 5x200 s were secured in the SDSS r and z bands, respectively. From a preliminary reduction of the data, the optical afterglow (Hu et al., GCN 38371; Izzo & Malesani, GCN 38372) is well detected in our images. We measure r = 19.52 +- 0.03 AB on Nov 28.80 UT (2.95 hr after the GRB); z = 19.03 +- 0.05 AB on Nov 28.81 UT (3.25 hr after the GRB). Both magnitudes are calibrated against nearby objects from the Pan-STARRS catalog. We note a discrepancy in the r-band magnitude compared to the nearly simultaneous measurement by Izzo & Malesani (GCN 38372), which we are unable to account for at the present time.
GCN 38374 table
GRB_name GRB241128A
GCN_number 38374
Detection_method Swift-XRT Det
ra 273.7236°
decl 33.4391°
Circular_text TITLE: GCN CIRCULAR NUMBER: 38374 SUBJECT: GRB 241128A: Enhanced Swift-XRT position DATE: 24/11/28 23:56:21 GMT FROM: Phil Evans at U of Leicester A.P. Beardmore, P.A. Evans, M.R. Goad and J.P. Osborne (U. Leicester) report on behalf of the Swift-XRT team. Using 1910 s of XRT Photon Counting mode data and 3 UVOT images for GRB 241128A, we find an astrometrically corrected X-ray position (using the XRT-UVOT alignment and matching UVOT field sources to the USNO-B1 catalogue): RA, Dec = 273.72356, +33.43915 which is equivalent to: RA (J2000): 18h 14m 53.65s Dec (J2000): +33d 26' 20.9" with an uncertainty of 3.0 arcsec (radius, 90% confidence). This position may be improved as more data are received. The latest position can be viewed at http://www.swift.ac.uk/xrt_positions. Position enhancement is described by Goad et al. (2007, A&A, 476, 1401) and Evans et al. (2009, MNRAS, 397, 1177). This circular was automatically generated, and is an official product of the Swift-XRT team.
GCN 38376 table
GRB_name GRB241128A
GCN_number 38376
Detection_method Swift-XRT Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 38376 SUBJECT: GRB 241128A: Swift-XRT refined Analysis DATE: 24/11/29 01:47:12 GMT FROM: Phil Evans at U of Leicester J.A. Kennea (PSU), D.N. Burrows (PSU), M. A. Williams (PSU), A.P. Beardmore (U. Leicester), J.P. Osborne (U. Leicester), T. Sbarrato (INAF-OAB), P. D'Avanzo (INAF-OAB), M.G. Bernardini (INAF-OAB) and P.A. Evans report on behalf of the Swift-XRT team: We have analysed 6.2 ks of XRT data for GRB 241128A, from 3.9 ks to 28.3 ks after the BAT trigger. The data are entirely in Photon Counting (PC) mode. The light curve can be modelled with a power-law decay with a decay index of alpha=0.51 (+/-0.15). A spectrum formed from the PC mode data can be fitted with an absorbed power-law with a photon spectral index of 2.07 (+0.31, -0.25). The best-fitting absorption column is 8.9 (+7.5, -2.9) x 10^20 cm^-2, consistent with the Galactic value of 6.0 x 10^20 cm^-2 (Willingale et al. 2013). The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 3.2 x 10^-11 (4.0 x 10^-11) erg cm^-2 count^-1. A summary of the PC-mode spectrum is thus: Total column: 8.9 (+7.5, -2.9) x 10^20 cm^-2 Galactic foreground: 6.0 x 10^20 cm^-2 Excess significance: <1.6 sigma Photon index: 2.07 (+0.31, -0.25) If the light curve continues to decay with a power-law decay index of 0.51, the count rate at T+24 hours will be 0.017 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 5.6 x 10^-13 (6.9 x 10^-13) erg cm^-2 s^-1. The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/01270999. This circular is an official product of the Swift-XRT team.
GCN 38380 table
GRB_name GRB241128A
GCN_number 38380
Detection_method Swift Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 38380 SUBJECT: Swift GRB 241128A: Global MASTER-Net observations report DATE: 24/11/29 10:38:36 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs 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 Swift GRB 241128A ( R. Brivio et al., GCN 38367) errorbox 65606 sec after notice time and 65649 sec after trigger time at 2024-11-29 10:28:43 UT, with upper limit up to 19.3 mag. Observations started at twilight. The observations began at zenith distance = 43 deg. The sun altitude is -12.6 deg. The galactic latitude b = 21 deg., longitude l = 61 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2687409 We obtain a following upper limits. Tmid-T0 | Site |Filt.| Expt. | Limit| Comment _________|_____________________|_____|_______|______|________ 65694 | MASTER-Tunka | C | 90 | 19.1 | 65798 | MASTER-Tunka | C | 90 | 19.2 | 65887 | MASTER-Tunka | C | 60 | 19.3 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.
GCN 38382 table
GRB_name GRB241128A
GCN_number 38382
Detection_method Swift-BAT Det
Circular_text TITLE: GCN CIRCULAR NUMBER: 38382 SUBJECT: GRB 241128A: GRANDMA and Kilonova-Catcher Optical Afterglow Detections and Upperlimits DATE: 24/11/29 15:25:01 GMT FROM: Dalya Akl at American Uni. SHJ D. Akl (AUS), E. de Bruin (UMN), C. Andrade (UMN), M. Tanasan (NARIT), N. Kochiashvili (AbAO), T. Hussenot-Desenonges (IJCLAB), M. Coughlin (UMN), M. Molham (NRIAG), S. Agayeva (Shamakhy Obs.), S. Antier (OCA), S. Karpov (FZU), D. Turpin (CEA-Saclay/Irfu), I. Tosta e Melo (UniCT-DFA), P. Hello (IJCLAB), P-A Duverne (APC), T. Pradier (Unistra/IPHC), N. Guessoum (AUS), M. Masek (FZU), A. Klotz (IRAP), M. Boer, S. Gervasoni, C. Limonta (OCA), E. Broens, F. Kugel (KNC), on behalf of the GRANDMA and Kilonova-Catcher collaborations: We observed the field of GRB 241128A (Brivio et al., GCN 38367) detected by Swift-BAT with GRANDMA and its citizen science project Kilonova-catcher (KNC). Our observations were performed with the FRAM-CTA-N, TAROT-TCA, KNC T400, and KNC-T-BRO telescopes starting from TGRB+108 min. We clearly detect the optical afterglow within the Swift-XRT uncertainty region (Beardmore et al., GCN 38374) and obtain the following magnitudes and 5-sigma upperlimits: +---------------------+-------------+--------+----------------+------------+ | T-mid(UTC) | Exposure(s) | Filter | Mag (AB) | Instrument | +=====================+=============+========+================+============+ | 2024-11-28T18:02:48 | 27x60 | Clear | 19.50 +/- 0.07 | KNC | | 2024-11-28T18:11:15 | 7x180 | Clear | 19.78 +/- 0.22 | KNC | | 2024-11-28T18:38:26 | 11x180 | Clear | 19.67 +/- 0.19 | KNC | | 2024-11-28T19:31:58 | 18x120 | R | 17.84 (U.L.) | FRAM-CTA-N | | 2024-11-28T19:40:56 | 3x180 | Clear | 17.53 (U.L.) | TAROT-TCA | +---------------------+-------------+--------+----------------+------------+ Our detection is consistent with the optical afterglow detected and reported by Hu et al., GCN 38371. Further, our magnitudes are consistent with those reported by LCO (Izzo and Malesani, GCN 38372) and NOT (Gompertz et al., GCN 38373). All the data have been reduced by a single data processing pipeline, STDPipe (Karpov et al., 2022). Images obtained in Johnson Cousin filters were calibrated using the Gaia DR3 Synphot catalog, while images taken with a clear filter were calibrated using the Gaia eDR3 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/).
GCN 38383 table
GRB_name GRB241128A
GCN_number 38383
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 38383 SUBJECT: GRB 241128A: Mondy optical observations DATE: 24/11/29 16:03:19 GMT FROM: XXXX at IKI N. Pankov (HSE, IKI), A. Pozanenko (IKI), E. Klunko (ISTP), A. Volnova (IKI) report on behalf of GRB IKI FuN: We observed the field of GRB 241128A (Brivio et al., GCN 38367; Page, GCN 38368) with AZT-33IK telescope of Mondy observatory in R-filter on 2024-11-29 starting (UT) 10:48:37. We detect the afterglow (Hu et al., GCN 38371; Izzo and Malesani, GCN 38372; Gompertz et al., GCN 38373; Akl et al., GCN 38382). Preliminary photometry of the afterglow is the following Date UT start t-T0 Exp. Filter OT Err. UL(3sigma) (mid, days) (s) 2024-11-29 10:48:37 0.79796 15x120 R 19.80 0.10 22.9 The photometry is based on nearby USNO-B1.0 R2 stars.
GCN 38387 table
GRB_name GRB241128A
GCN_number 38387
Detection_method Swift-BAT Det
ra 273.7240°
decl 33.4920°
Circular_text TITLE: GCN CIRCULAR NUMBER: 38387 SUBJECT: GRB 241128A: Swift-BAT refined analysis DATE: 24/11/30 02:20:35 GMT FROM: Amy T. Parsotan (GSFC), S. D. Barthelmy (GSFC), R. Brivio (INAF-OAB), R. Gupta (GSFC), H. A. Krimm (NSF), S. Laha (GSFC/UMBC), A. Y. Lien (U Tampa), C. B. Markwardt (GSFC), M. J. Moss (GSFC), D. M. Palmer (LANL), D. Sadaula (GSFC/UMBC), T. Sakamoto (AGU) (i.e. the Swift-BAT team): Using the data set from T-240 to T+899 sec from the recent telemetry downlink, we report further analysis of BAT GRB 241128A (trigger #1270999) (Brivio et al., GCN Circ. 38367). The BAT ground-calculated position is RA, Dec = 273.724, 33.492 deg which is RA(J2000) = 18h 14m 53.7s Dec(J2000) = +33d 29' 32.9" with an uncertainty of 2.4 arcmin, (radius, sys+stat, 90% containment). The partial coding was 52%. The mask-weighted light curve shows a multi-pulse structure that starts at ~T0 and ends at ~T+240 s. The main pulse starts at ~T0, peaks at ~T+3 s, and ends at ~T+10 s. In addition, there is a weak pulse at ~T+220 s. T90 (15-350 keV) is 238.32 +- 15.83 sec (estimated error including systematics). The time-averaged spectrum from T-0.86 to T+244.08 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.54 +- 0.31. The fluence in the 15-150 keV band is 1.1 +- 0.2 x 10^-06 erg/cm2. The 1-sec peak photon flux measured from T+2.88 sec in the 15-150 keV band is 1.0 +- 0.2 ph/cm2/sec. All the quoted errors are at the 90% confidence level. The results of the batgrbproduct analysis are available at https://swift.gsfc.nasa.gov/results/batgrbcat/BAT_refined_circular/1270999
GCN 38395 table
GRB_name GRB241128A
GCN_number 38395
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 38395 SUBJECT: GRB 241128A: AbAO optical upper limit DATE: 24/11/30 15:48:32 GMT FROM: Alexei Pozanenko at IKI, Moscow N. Pankov (HSE), A. Pozanenko (IKI), E. Klunko (ISTP), A. Volnova (IKI), S. Belkin (HSE, Monash) report on behalf of GRB IKI FuN: We observed the field of GRB 241128A (Brivio et al., GCN 38367; Page, GCN 38368; Parsotan et al., GCN 38387) with AS-32 telescope of Abastumani observatory (AbAO) in R-filter on 2024-11-29 starting (UT) 14:47:06. We do not detect the afterglow (Hu et al., GCN 38371; Izzo and Malesani, GCN 38372; Gompertz et al., GCN 38373; Akl et al., GCN 38382; Pankov et al., GCN 38383). Preliminary photometry of the field is the following Date UT start t-T0 Exp. Filter OT Err. UL(3sigma) (mid, days) (s) 2024-11-29 14:47:06 0.96877 85x60 R n/d n/d 20.2 The photometry is based on nearby USNO-B1.0 R2 star
GCN 38422 table
GRB_name GRB241128A
GCN_number 38422
Detection_method Swift-UVOT Other
Circular_text 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 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).
GCN 38432 table
GRB_name GRB241128A
GCN_number 38432
Detection_method Fermi GBM Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 38432 SUBJECT: Fermi-GBM Sub-Threshold Detection of GRB 241128A DATE: 24/12/03 17:09:15 GMT FROM: rhamburg@usra.edu R. Hamburg (USRA) reports on behalf of the Fermi-GBM Team: The Swift-BAT detected GRB 241128A on 2024-11-28 at 16:14:34 UTC (Brivio et al. 2024, GCN 38367). There was no Fermi-GBM onboard trigger around this event time. An automated, blind search for gamma-ray bursts below the onboard triggering threshold in Fermi-GBM identified no counterparts. The GBM Targeted Search [1], a sensitive and coherent search for subthreshold GRB-like signals, was run from +/-30 s around the Swift-BAT trigger time and identified a gamma-ray transient most significantly at 16:14:38 UTC (Fermi MET=754503283), about 4 s after the Swift-BAT trigger time. The transient is approximately 2 s in duration and was identified with the "normal" spectral template (Band function with Epeak = 230 keV, alpha = -1.0, beta = -2.3) with FAR of 1.7e-4 Hz. The Targeted Search localization is consistent with the Swift-BAT location. [1] Goldstein et al. arXiv:1903.12597
GCN 38438 table
GRB_name GRB241128A
GCN_number 38438
Detection_method Other
ra 273.7232°
Circular_text TITLE: GCN CIRCULAR NUMBER: 38438 SUBJECT: GRB 241128A : RAPAS follow-up observations DATE: 24/12/04 11:08:56 GMT FROM: Thierry Midavaine at GRANDMA Thierry Midavaine on behalf of the RAPAS network reports (#3) : Cédric Latgé, Patrick Martinez [1], Pierre-Michel Bergé, Erik Guthleben, Patrick Martinez [2], Thierry Midavaine [3] observed the Gamma-Ray Burst GRB241128A (R. Brivio et al. GCN 38367, K.L. Page GCN 38368) using [1][2] ADAGIO N 820mm telescope f=3.1m at Belesta Observatory (IAU A05) equiped with a Moravian C3 CMOS camera, 1200s exposure [1],1500s exposure [2], [3] RC 500mm f=1.414m at Salvia Observatory (I73) equipped with ZWO6200MMPRO CMOS camera, 2400s exposure, [1][2][3] are equiped with RAPAS filters meeting the Gaia G, Gbp, Grp photometric bands. The FITS files are reduced with the Gaia photometric catalog in respective G, Gbp, Grp bands. The afterglow is detected RA(J2000) = 18h 14m 53.57s ; Dec(J2000) = +33° 26’ 20.4” ; ± 0.5’’ [1][2] At this location it is not detected, above the upper limit magnitude [3] MJD (mid) Gaia band mag.(Gaia) RAPAS station 60643.72986 G 20.50 ± 0.5 [1] 60644.77083 G 21.00 ± 0.5 [2] 60647.74270 G+Gbp+Grp >21. [3] RAPAS ( https://proam-gemini.fr/rapas/ ) is a new ProAm collaboration funded by Paris Observatory, delivering to a network of french amateur observatories a set of 3 filters meeting the Gaia spectral bands. This network is dedicated to deliver data in the Gaia photometric system on selected astrophysical alerts by Astro-COLIBRI ( https://astro-colibri.com/ ) or from Gaia alerts.
GCN 38519 table
GRB_name GRB241128A
GCN_number 38519
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 38519 SUBJECT: GRB 241128A: CrAO ZTSh and Mondy AZT-33IK optical observations DATE: 24/12/10 09:57:54 GMT FROM: Nicolai Pankov at HSE, IKI RAS A. Volnova (IKI), N. Pankov (HSE, IKI), A. Pozanenko (IKI), V. Rumyantsev (CrAO), E. Klunko (ISTP) report on behalf of IKI-GRB-FuN: We continued observations of the GRB 241128A (Brivio et al., GCN 38367; Page, GCN 38368) with 2.6-meter ZTSh telescope of CrAO observatory and 1.5-meter AZT-33IK telescope of Sayan observatory (Mondy). The optical afterglow (Hu et al., GCN 38371; Izzo and Malesani, GCN 38372; Gompertz et al., GCN 38373; Akl et al., GCN 38382; Pankov et. al, GCN 38383, GCN 38395; Shilling & Brivio, GCN 38422; Midavaine et. al, GCN 38438) is well detected in the stacked images from ZTSh on both epochs of 2024-11-30 and 2024-12-01. Preliminary photometry is given below: Date UT start t-T0 Exp. Filter OT Err. UL(3sigma) Telescope (mid, days) (s) 2024-11-30 17:38:32 2.066296 11*120 R 22.03 0.14 23.1 ZTSh 2024-12-01 10:31:12 2.793500 46*120 R n/d n/d 21.9 AZT-33IK 2024-12-01 15:19:05 3.000058 48*120 R 23.12 0.11 24.0 ZTSh The magnitudes were calibrated against nearby PS1 stars (R magnitudes obtained with Lupton transformations) and not corrected for the Galactic extinction. Using the current photometry and our photometry reported previously (Pankov et. al, GCN, 38383) we found that the light curve is well fitted with a simple power-law model with an index of -2.2.
GCN 39271 table
GRB_name GRB241128A
GCN_number 39271
Detection_method Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 39271 SUBJECT: GRB 241128A: VIRT Optical Upper Limit DATE: 25/02/10 20:27:27 GMT FROM: Priya Gokuldass at ERAU R. Querrard (UVI), P. Gokuldass (ERAU), N. Orange (OrangeWave Innovative Science, LLC), B. Gendre (UVI), D. Morris (NASA), T. Lombardi (Eckerd College), F. George (ERAU), D. Smith (UVI), K. Smith (UVI), C. Watson (UVI) report: We observed the field of GRB241128A (Brivio et al., GCN 38367) with the 0.5m Virgin Island Robotic Telescope (VIRT) at the University of the Virgin Islands' Etelman Observatory on 2024-11-29 starting at 22:47:51.703 (T-mid ~ T0 + 30.75 hrs). We performed a series of exposures in an R filter with a total exposure of 1370s. The weather conditions were partly cloudy during the hours of observation with an average airmass of 2.94. We do not detect any source within the enhanced XRT position (Beardmore et al. GCN 38374). This non-detection is consistent with reported detections (Hu et al., GCN 38371;Izzo et al., GCN 38372; Gompertz et al., GCN 38373; Akl et al., GCN 38382; Pankov et al., GCN 38383; Midavaine et al., GCN 38438; and Volnova et al., GCN 38519 ) and upper limits (Lipunov et al., GCN 38380; Shilling et al., GCN 38422; Akl et al., GCN 38382; Pankov et al., GCN 38395; Midavaine et al., GCN 38438; and Volnova et al., GCN 38519 ). We report the following 3-sigma upper limit: T_mid ||Exposure ||Filter ||Limit T+30.75 hrs || 1370 s || R || > 18.6 The limit is estimated from comparison to nearby USNO B1 stars and is not corrected for Galactic extinction. We acknowledge financial support from NASA EPSCoR award 80NNSC22M0063, NSF PAARE award 2319415, and NASA EPSCoR award 80NSSC24M0112. This message can be cited.