GRBweb by P. Coppin

This page lists all entries on GRB230623A in GRBweb

Summary IPN GCN 34068 GCN 34071 GCN 34072 GCN 34073 GCN 34081

Summary table
Variable	Value	Source
T0	7:23:37 UTC	GCN_circulars,MAXI Det
ra	349.9792°	IPN
decl	-17.8333°	IPN
pos_error	2.33e-01°	IPN
GBM_located	False
mjd	60118.30806712963	GCN_circulars,MAXI Det

IPN table
GRB_name	GRB230623A
ra	349.9792°
decl	-17.8333°
pos_error	2.33e-01°

GCN 34068 table
GRB_name	GRB230623A
GCN_number	34068
Detection_method	MAXI Det
t_trigger	7:23:37 UTC
ra	349.9810°
decl	-17.8420°
Circular_text	TITLE: GCN CIRCULAR NUMBER: 34068 SUBJECT: GRB 230623A: MAXI/GSC detection DATE: 23/06/23 09:39:20 GMT FROM: Motoko Serino at Aoyama Gakuin U. Y. Hagiwara (Miyazaki U.), H. Negoro, M. Nakajima (Nihon U.), M. Serino (AGU), 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 (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, T. Kurihara (JAXA), Y. Ueda, K. Setoguchi, T. Yoshitake, Y. Nakatani (Kyoto U.), M. Yamauchi, Y. Umeki, Y. Otsuki (Miyazaki U.), K. Yamaoka (Nagoya U.), Y. Kawakubo (LSU), M. Sugizaki (NAOC), W. Iwakiri (Chiba U.) report on behalf of the MAXI team: The MAXI/GSC nova alert system triggered a bright uncatalogued X-ray transient source at 07:23:37 UT on 23 June 2023. Assuming that the source flux was constant over the transit, we obtain the source position at (R.A., Dec) = (349.981 deg, -17.842 deg) = (23 19 55, -17 50 31) (J2000) with a statistical 90% C.L. elliptical error region with long and short radii of 0.23 deg and 0.2 deg, respectively. The roll angle of long axis from the north direction is 40.0 deg counterclockwise. There is an additional systematic uncertainty of 0.1 deg (90% containment radius). The X-ray flux averaged over the scan was 185 +- 29 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) = (349.422, -18.340) deg = (23 17 41, -18 20 23) (J2000) (R.A., Dec) = (349.773, -18.563) deg = (23 19 05, -18 33 46) (J2000) (R.A., Dec) = (350.604, -17.375) deg = (23 22 24, -17 22 30) (J2000) (R.A., Dec) = (350.255, -17.153) deg = (23 21 01, -17 09 10) (J2000) There was no significant excess flux in the previous transit at 05:50 UT and in the next transit at 08:56 UT with an upper limit of 20 mCrab for each.

GCN 34071 table
GRB_name	GRB230623A
GCN_number	34071
Detection_method	Swift Other
Circular_text	TITLE: GCN CIRCULAR NUMBER: 34071 SUBJECT: GRB 230623A: Tiled Swift observations DATE: 23/06/23 14:27:31 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 230623A. Automated analysis of the XRT data will be presented online at http://www.swift.ac.uk/xrt_products/TILED_GRB00113 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 34072 table
GRB_name	GRB230623A
GCN_number	34072
Detection_method	Optical
Circular_text	TITLE: GCN CIRCULAR NUMBER: 34072 SUBJECT: MAXI GRB 230623A: MASTER optical observations DATE: 23/06/23 15:35:27 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs V.Lipunov, A.Kuznetsov, N.Tiurina, E.Gorbovskoy, P.Balanutsa, K.Zhirkov, O.Gress, A.Chasovnikov, G.Antipov, D.Vlasenko, V.Senik, V.Topolev, Ya.Kechin, Yu.Tselik, Siyu Wu, D.Cheryasov, V.Shumkov, T.Pogrosheva (Lomonosov Moscow State University,SAI,Physics Department), C.Francile, F. Podesta, C.Lopez, R. Podesta (Observatorio Astronomico Felix Aguilar OAFA), D.Buckley (SAAO), R. Rebolo, M. Serra (The Instituto de Astrofisica de Canarias), L.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez,J.Martinez,A.Corella,L.H.Rodriguez (INAOE, Guillermo Haro Astrophysics Observatory), N.M.Budnev, O.Ershova (ISU,API), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), A. Gabovich, V.Yurkov (Blagoveschensk Educational State University), M.Gulyaev, E.Minkina (Lomonosov MSU) MASTER-OAFA obotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) pointed to MAXI/GSC GRB 230623A (Hagiwara et al. GCN 34068, Trigger=2023-06-23 07:23:37 UT, not came in socket, Tnotice(GCN)=09:39:20) at 2023-06-23 10:14:25UT through clouds with mlim=17.0 at first 6 images (sun alt.=-16 and sunrise), we don't find OT insode 0.23deg MAXI error-box by auto-detection system. We also made the difference with old MASTER image and didn't find new optical sources, that can be connected with GRB.

GCN 34073 table
GRB_name	GRB230623A
GCN_number	34073
Detection_method	Swift Other
Circular_text	TITLE: GCN CIRCULAR NUMBER: 34073 SUBJECT: GRB 230623A: Tiled Swift observations DATE: 23/06/23 15:44:41 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 230623A. Automated analysis of the XRT data will be presented online at http://www.swift.ac.uk/xrt_products/TILED_GRB00114 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 34081 table
GRB_name	GRB230623A
GCN_number	34081
Detection_method	Swift-XRT Other
Circular_text	TITLE: GCN CIRCULAR NUMBER: 34081 SUBJECT: GRB 230623A: Swift-XRT observations DATE: 23/06/26 13:41:57 GMT FROM: Phil Evans at U of Leicester S. Dichiara (PSU), J.A. Kennea (PSU), A. Tohuvavohu (U. Toronto), J.P. Osborne (U. Leicester), K.L. Page (U. Leicester), A.P. Beardmore (U. Leicester), E. Ambrosi (INAF-IASFPA) , M. Capalbi (INAF-IASFPA), M. Perri (SSDC & INAF-OAR) 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 230623A in a series of observations tiled on the sky. The total exposure time is 1.8 ks, distributed over 7 tiles; the maximum exposure at a single sky location was 807 s. The data were collected between T0+19.9 ks and T0+38.0 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 ~0.02 to ~0.23 ct s^-1, corresponding to a 0.3-10 keV observed flux of 6.1e-13 to 9.1e-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_GRB00113. This circular is an official product of the Swift-XRT team.