Swift Trigger: 1048783

Presumed name: GRB 210517A

BAT	23^h 52^m 41.76^s, -39° 06′ 18.0″
position:	(358.174, -39.105 ± 180″)
XRT	23^h 52^m 53.90^s, -39° 06′ 08.3″
position:	(358.2246, -39.1023 ± 2.1″)
UVOT	No position available.
Galactic N_HI:	1.25×10²⁰ cm^-2
Galactic E(B-V):	0.012 mag

Best RA:	23^h 52^m 53.90^s	= 358.2246 d
Best Dec:	-39° 06′ 08.3″	= -39.1023 d

Gal Lat:	-72.91
Gal Long:	344.78

Sun angle:	78.26°, 3.7 hr West

GCN Notices for this burst.

View this region in Aladin.

Observability of this burst for Swift.

Sun angle for this burst.

UVOT data

No UVOT images are currently available.

XRT SPER data

SPER results page for this trigger.

There are 6 SPER messages, and 1 objects have been found

- Object 1 - enhanced position.
- RA (J2000) : 23 52 53.88 (-39.1020)
- Dec (J2000): -39 06 07.2 ( -39.10541)
- Error (90%): 2.1
- Counts in Source: 176

See the SPER page for details of how this position was produced.

Known transients within 5′ of the GRB

Click on the offset to view the transient announcement.

Offset (′′)	RA	Dec	Source	Misc
0.5′′	358.22479	-39.10231	GCN #30037	GRB 210517A: VLT/X-shooter optical afterglow and redshift
0.5′′	358.22446	-39.10219	GCN #30034	GRB 210517A: Enhanced Swift-XRT position
1.1′′	358.22450	-39.10200	GCN #30057	GRB 210517A: KCT optical upper limit
1.1′′	358.22450	-39.10200	GCN #30032	GRB 210517A: Swift detection of a burst
96.9′′	358.19000	-39.10400	GCN #30043	GRB 210517A: Swift-BAT refined analysis
141.7′′	358.17400	-39.10500	GCN #30033	Swift GRB 210517A: Global MASTER-Net observations report

There are 11 matches in total. See the full table for details.

Catalogue Searches. Searched 0′ around XRT position

Click on the distance to view the full details (not available for sources from the SSS catalogue). Click on the column headers to sort the table on that column (click again to invert sort order).

SIMBAD

	RA*	Dec*	SIMBAD name		Query
117.2	358.2528	-39.0782	2MASX J23530068-3904416	H=14.552, J=15.250, K=13.991