School of Physics & Astronomy

| site map

Home
About
The Swift Mission UK involvement Instruments
GRBs before Swift GRBs in the Swift era Non-GRB science with Swift GRB research at Leicester
Spacecraft status Swift in the press Swift Videos
Support
Helpdesk TOO requests Guest Investigator program Target visibility checker Search transient database
Data Access
Overview Quick Look GCN Notices Download obs data Search obs catalogue The 2SXPS catalogue The LSXPS catalogue
Data Analysis
Data analysis overview Swift software
Build XRT products
BAT data analysis guide XRT data analysis guide XRT digest UVOT data analysis guide
Data Products
GRBs Full dataset Swift XRT products for GRBs XRT positions XRT light curves XRT spectra XRT GRB catalogue XRT GRB images Burst analyser Prompt data GRB field info XRT prompt analysis External triggers Einstein Probe follow up SVOM follow up Neutrino follow up Gravitational Wave follow up
Publications
Publication index Published papers Submitted papers XRT instrument papers ATels GCNs Conferences
Links
Databases NED Simbad GCN circulars archive GRB data table Software & Tools Swift Software (HEASoft) Xanadu WebPIMMS Institutional Swift Sites GSFC PSU OAB SSDC MSSL University of Leicester

Summary|
Sky images|
UVOT images|
SPER data|
Catalogues|

[Hide] [Trigger list]

Swift Trigger: 1344131;

Presumed name: GRB 250821A

Back to trigger list.

BAT	23^h 53^m 38.88^s, -28° 37′ 04.8″
position:	(358.412, -28.618 ± 180″)
XRT	23^h 53^m 45.71^s, -28° 39′ 13.3″
position:	(358.44046, -28.65369 ± 2.9″)
UVOT	No position available.
Galactic N_HI:	1.57×10²⁰ cm^-2
Galactic E(B-V):	0.017 mag

Best RA:	23^h 53^m 45.71^s	= 358.44046 d
Best Dec:	-28° 39′ 13.3″	= -28.65369 d

Gal Lat:	-77.17
Gal Long:	22.76

Sun angle:	149.13°, 10.1 hr West

SIMBAD objects within 200 of XRT position

	RA*	Dec*	SIMBAD name		Query
70.9	358.4512	-28.6364	2dFGRS TGS275Z077	B=18.325, R=17.577
87.3	358.4162	-28.6653	LEDA 85880	B=16
110.3	358.4596	-28.6793	2dFGRS TGS274Z001	B=19.183, R=18.519
127.9	358.4055	-28.6358	2QZ J235337.2-283808	G=20.233427
150.3	358.4329	-28.6949	2dFGRS TGS274Z002	B=19.222, R=17.789
155.3	358.3915	-28.6575	LEDA 739057	B=18.321, G=20.394529, R=17.019
180.0	358.4851	-28.6226	Gaia DR3 2327986318698720512	G=19.332565
181.8	358.4108	-28.6104	2QZ J235338.5-283637

* RA/Dec in equinox J2000