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This page lists all entries on GRB241213B in GRBweb

Summary IPN GCN 38555 GCN 38563 GCN 38565

Summary table
Variable	Value	Source
T0	12:56:30 UTC	GCN_circulars,MAXI Det
ra	331.4500°	IPN
decl	4.2833°	IPN
pos_error	1.47e+00°	IPN
GBM_located	False
mjd	60657.53923611111	GCN_circulars,MAXI Det

IPN table
GRB_name	GRB241213B
ra	331.4500°
decl	4.2833°
pos_error	1.47e+00°

GCN 38555 table
GRB_name	GRB241213B
GCN_number	38555
Detection_method	MAXI Det
t_trigger	12:56:30 UTC
ra	331.4500°
decl	4.2820°
Circular_text	TITLE: GCN CIRCULAR NUMBER: 38555 SUBJECT: GRB 241213B: MAXI/GSC detection DATE: 24/12/13 13:30:39 GMT FROM: Hitoshi Negoro at Nihon University/MAXI team H. Negoro (Nihon U.), M. Serino, Y. Kawakubo (AGU), W. Iwakiri (Chiba U.), M. Nakajima, Y. Kudo, H. Shibui, K. Takagi, H. Takahashi, K. Tatano, H. Nishio (Nihon U.), T. Mihara, T. Kawamuro, S. Yamada, S. Wang, T. Tamagawa, N. Kawai, M. Matsuoka (RIKEN), T. Sakamoto, S. Sugita, H. Hiramatsu, H. Nishikawa, Y. Kondo, S. Sasao, A. Yoshida (AGU), Y. Tsuboi, H. Sugai, N. Nagashima (Chuo U.), M. Shidatsu, Y. Niida (Ehime U.), I. Takahashi, M. Niwano, N. Higuchi, Y. Yatsu (Tokyo Tech), S. Nakahira, S. Ueno, H. Tomida, M. Ishikawa, S. Ogawa, M. Kurihara (JAXA), Y. Ueda, Y. Okada, K. Fujiwara (Kyoto U.), M. Yamauchi, Y. Otsuki, T. Hasegawa, M. Nishio (Miyazaki U.), K. Yamaoka (Nagoya U.), and M. Sugizaki (Kanazawa U.) The MAXI/GSC nova alert system triggered on a bright uncatalogued X-ray transient source at 12:56:30 UT on 2024 December 13. Assuming that the source flux was constant over the transit, we obtain the source position at (R.A., Dec) = (331.450 deg, 4.282 deg) = (22 05 48, +04 16 55) (J2000) with a statistical 90% C.L. elliptical error region with long and short radii of 0.16 deg and 0.15 deg, respectively. The roll angle of the long axis from the north direction is 141.0 deg counterclockwise. There is an additional systematic uncertainty of 0.1 deg (90% containment radius). The X-ray flux averaged over the scan was 465 +- 58 mCrab (4.0-10.0keV, 1 sigma error). Without assumptions on the source constancy, we obtain a rectangular error box for the transient source with the following corners: (R.A., Dec) = (331.162, 4.788) deg = (22 04 38, +04 47 16) (J2000) (R.A., Dec) = (330.936, 4.585) deg = (22 03 44, +04 35 05) (J2000) (R.A., Dec) = (331.900, 3.518) deg = (22 07 35, +03 31 04) (J2000) (R.A., Dec) = (332.126, 3.721) deg = (22 08 30, +03 43 15) (J2000) There was no significant excess flux in the previous transit at 11:23 UT with an upper limit of 20 mCrab.

GCN 38563 table
GRB_name	GRB241213B
GCN_number	38563
Detection_method	CALET
Circular_text	TITLE: GCN CIRCULAR NUMBER: 38563 SUBJECT: GRB 241213B: CALET Gamma-Ray Burst Monitor detection DATE: 24/12/13 16:50:42 GMT FROM: Yuta Kawakubo at Aoyama Gakuin University P. S. Marrocchesi (U of Siena), A. Yoshida, T. Sakamoto, S. Sugita, Y. Kawakubo (AGU), K. Yamaoka (Nagoya U), S. Nakahira (JAXA), Y. Asaoka (ICRR), S. Torii, Y. Akaike, K. Kobayashi (Waseda U), Y. Shimizu, T. Tamura (Kanagawa U), N. Cannady (GSFC/UMBC), M. L. Cherry (LSU), S. Ricciarini (U of Florence), and the CALET collaboration: The GRB 241213B (MAXI/GSC detection: Negoro et al., GCN Circ. 38555) was detected in the ground analysis of the CALET Gamma-ray Burst Monitor (CGBM) data around 12:56:30 on 13 December 2024 (referenced to the MAXI detection: GCN Circ. 38555). (https://cgbm.calet.jp/cgbm_trigger/flight/1418129753/index.html). The burst signal was seen by all CGBM detectors. The burst light curve shows a single pulse that starts at T+1.8 sec, peaks at T+2.4 sec, and ends at T+4.5 sec. The T90 and T50 durations measured by the SGM data are 2.4 +/- 0.5 sec and 1.2 +/- 0.4 sec (7-100 keV), respectively. The ground-processed light curve is available at https://cgbm.calet.jp/cgbm_trigger/ground/1418129753/ The CALET data used in this analysis are provided by the Waseda CALET Operation Center located at Waseda University.

GCN 38565 table
GRB_name	GRB241213B
GCN_number	38565
Detection_method	Swift Other
Circular_text	TITLE: GCN CIRCULAR NUMBER: 38565 SUBJECT: GRB 241213B: Tiled Swift observations DATE: 24/12/14 03:58:22 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 241213B. Automated analysis of the XRT data will be presented online at http://www.swift.ac.uk/xrt_products/TILED_GRB00130 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.