Swift Trigger: 1047531

Presumed name: GRB 210509A

BAT	23^h 21^m 24.48^s, +06° 40′ 30.0″
position:	(350.352, +6.675 ± 180″)
XRT	23^h 21^m 29.83^s, +06° 40′ 16.8″
position:	(350.37430, 6.67134 ± 4.4″)
UVOT	No position available.
Galactic N_HI:	5.34×10²⁰ cm^-2
Galactic E(B-V):	0.090 mag

Best RA:	23^h 21^m 29.83^s	= 350.37430 d
Best Dec:	+06° 40′ 16.8″	= 6.67134 d

Gal Lat:	-49.8
Gal Long:	86.88

Sun angle:	55.70°, 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 4 SPER messages, and 1 objects have been found

- Object 1
- RA (J2000) : 23 21 29.88 ( 350.37448)
- Dec (J2000): +06 40 17.2 ( 6.67145)
- Error (90%): 4.092"
- Counts in Source: 20

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
0.0′′	350.37430	6.67134	GCN #29971	GRB 210509A: Swift-XRT observations
4.7′′	350.37563	6.67125	GCN #29973	GRB 210509A: Enhanced Swift-XRT position
73.4′′	350.35417	6.67528	GCN #29970	GRB 210509A: Swift detection of a burst
85.3′′	350.36333	6.65031	GCN #29975	GRB 210509A: Swift-BAT refined analysis

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
108.0	350.3982	6.6529	GSC 00584-00247	B=14.6, G=13.8579, H=12.520, J=12.798, K=12.48, R=14.20, g=14.211, i=13.763, r=13.902, u=15.363, z=13.672

* RA/Dec in equinox J2000

X-ray sources

	RA*	Dec*		Source table²	Observatory	Query