GRB231129B

This page lists all entries on GRB231129B in GRBweb

Summary IPN GCN 35214 GCN 35215 GCN 35247

Summary table
Variable Value Source
T0 14:03:05 UTC GCN_circulars,MAXI Det
ra 285.6583° IPN
decl 40.2833° IPN
pos_error 4.00e-01° IPN
GBM_located False
mjd 60277.58547453704 GCN_circulars,MAXI Det
IPN table
GRB_name GRB231129B
ra 285.6583°
decl 40.2833°
pos_error 4.00e-01°
GCN 35214 table
GRB_name GRB231129B
GCN_number 35214
Detection_method MAXI Det
t_trigger 14:03:05 UTC
ra 285.6620°
decl 40.2780°
Circular_text TITLE: GCN CIRCULAR NUMBER: 35214 SUBJECT: GRB 231129B: MAXI/GSC detection DATE: 23/11/29 15:23:40 GMT FROM: Motoko Serino at Aoyama Gakuin U. M. Kurihara (JAXA), H. Negoro (Nihon U.), M. Serino (AGU), W. Iwakiri (Chiba U.), M. Nakajima, K. Kobayashi, M. Tanaka, Y. Soejima, Y. Kudo (Nihon U.), T. Mihara, T. Kawamuro, S. Yamada, T. Tamagawa, N. Kawai, M. Matsuoka (RIKEN), T. Sakamoto, S. Sugita, H. Hiramatsu, H. Nishikawa, A. Yoshida (AGU), Y. Tsuboi, S. Urabe, S. Nawa, N. Nemoto, E.Goto (Chuo U.), M. Shidatsu (Ehime U.), I. Takahashi, M. Niwano, S. Sato, N. Higuchi, Y. Yatsu (Tokyo Tech), S. Nakahira, S. Ueno, H. Tomida, M. Ishikawa, S. Ogawa, M. Kurihara (JAXA), Y. Ueda, K. Setoguchi, T. Yoshitake, Y. Nakatani, Y. Okada (Kyoto U.), M. Yamauchi, Y. Hagiwara, Y. Umeki, Y. Otsuki (Miyazaki U.), K. Yamaoka (Nagoya U.), Y. Kawakubo (LSU), M. Sugizaki (NAOC), report on behalf of the MAXI team: The MAXI/GSC nova alert system triggered a bright uncatalogued X-ray transient source at 14:03:05 UT on 29 November 2023. Assuming that the source flux was constant over the transit, we obtain the source position at (R.A., Dec) = (285.662 deg, 40.278 deg) = (19 02 38, +40 16 40) (J2000) with a statistical 90% C.L. elliptical error region with long and short radii of 0.39 deg and 0.26 deg, respectively. The roll angle of long axis from the north direction is 75.0 deg counterclockwise. Without assumptions on the source constancy, we obtain a rectangular error box for the transient source with the following corners: (283.889, 39.749) deg = (18 55 33, +39 44 56) (J2000) (284.232, 39.302) deg = (18 56 55, +39 18 07) (J2000) (286.730, 40.399) deg = (19 06 55, +40 23 56) (J2000) (286.398, 40.853) deg = (19 05 35, +40 51 10) (J2000) There is an additional systematic uncertainty of 0.1 deg (90% containment radius). The X-ray flux averaged over the scan was 141 +- 32 mCrab (4.0-10.0keV, 1 sigma error). There was no significant excess flux in the previous transit at 12:30 UT with an upper limit of 20 mCrab.
GCN 35215 table
GRB_name GRB231129B
GCN_number 35215
Detection_method Swift Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 35215 SUBJECT: GRB 231129B: Tiled Swift observations DATE: 23/11/29 17:28:07 GMT FROM: Phil Evans at U of Leicester P. A. Evans (U. Leicester) reports on behalf of the Swift team: Swift has initiated a series of observations, tiled on the sky, of the MAXI GRB 231129B. Automated analysis of the XRT data will be presented online at http://www.swift.ac.uk/xrt_products/TILED_GRB00116 Any uncatalogued X-ray sources detected in this analysis will be reported on this website and via GCN COUNTERPART notices. The probability of finding serendipitous sources, unrelated to the MAXI event is high: any X-ray source considered to be a probable afterglow candidate will be reported via a GCN Circular after manual consideration. Details of the XRT automated analysis methods are detailed in Evans et al. (2007, A&A, 469, 379; 2009, MNRAS, 397, 1177 and 2014, ApJS, 210, 8). This circular is an official product of the Swift-XRT team.
GCN 35247 table
GRB_name GRB231129B
GCN_number 35247
Detection_method Swift-XRT Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 35247 SUBJECT: GRB 231129B: Swift-XRT observations DATE: 23/12/01 16:04:46 GMT FROM: Phil Evans at U of Leicester T. Sbarrato (INAF-OAB), A. Tohuvavohu (U. Toronto), D.N. Burrows (PSU), J. D. Gropp (PSU), J.P. Osborne (U. Leicester), K.L. Page (U. Leicester), P. D'Avanzo (INAF-OAB), M.G. Bernardini (INAF-OAB) and P.A. Evans (U. Leicester) reports on behalf of the Swift-XRT team: Swift-XRT has performed follow-up observations of the MAXI-detected burst GRB 231129B in a series of observations tiled on the sky. The total exposure time is 2.0 ks, distributed over 7 tiles; the maximum exposure at a single sky location was 659 s. The data were collected between T0+12.3 ks and T0+18.0 ks, and are entirely in Photon Counting (PC) mode. No X-ray sources have been detected. The 3-sigma upper limit in the field (not including the regions where the tiles overlap) ranges from ~0.03 to ~0.07 ct s^-1, corresponding to a 0.3-10 keV observed flux of 1.1e-12 to 2.7e-12 erg cm^-2 s^-1 (assuming a typical GRB spectrum). The results of the XRT-team automatic analysis of the tiled XRT observations, including a position-specific upper limit calculator, are available at https://www.swift.ac.uk/xrt_products/TILED_GRB00116. This circular is an official product of the Swift-XRT team.