Swift Trigger: 1044426

Presumed name: GRB 210421A

BAT	06^h 59^m 37.92^s, +04° 56′ 02.4″
position:	(104.908, +4.934 ± 180″)
XRT	06^h 59^m 30.17^s, +04° 55′ 18.0″
position:	(104.87569, 4.92168 ± 3.7″)
UVOT	No position available.
Galactic N_HI:	3.21×10²¹ cm^-2
Galactic E(B-V):	0.402 mag

Best RA:	06^h 59^m 30.17^s	= 104.87569 d
Best Dec:	+04° 55′ 18.0″	= 4.92168 d

Gal Lat:	4.03
Gal Long:	209.46

Sun angle:	75.50°, -5.1 hr East of Sun

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 2 SPER messages, and 1 objects have been found

- Object 1
- RA (J2000) : 06 59 30.17 ( 104.87569)
- Dec (J2000): +04 55 18.0 ( 4.92168)
- Error (90%): 3.712"
- Counts in Source: 86

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
0.1′′	104.87571	4.92167	GCN #29849	GRB 210421A: Swift detection of a burst
5.1′′	104.87443	4.92232	GCN #29865	GRB 210421A: Enhanced Swift-XRT position
32.1′′	104.88200	4.92800	GCN #29893	GRB 210421A: 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

* RA/Dec in equinox J2000

X-ray sources

	RA*	Dec*		Source table²	Observatory	Query

Queried the X-ray MASTER catalogue.

* RA/Dec in equinox J2000

¹Energy band for count-rate is mission specific.

Galaxies

	RA*	Dec*	Redshift