Swift Trigger: 1107466

Presumed name: GRB 220521A

BAT	18^h 20^m 47.28^s, +10° 23′ 02.4″
position:	(275.197, +10.384 ± 180″)
XRT	18^h 20^m 55.15^s, +10° 22′ 20.0″
position:	(275.22978, 10.37221 ± 1.9″)
UVOT	No position available.
Galactic N_HI:	1.13×10²¹ cm^-2
Galactic E(B-V):	0.207 mag

Best RA:	18^h 20^m 55.15^s	= 275.22978 d
Best Dec:	+10° 22′ 20.0″	= 10.37221 d

Gal Lat:	11.44
Gal Long:	38.83

Sun angle:	132.58°, 9.6 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 - enhanced position.
- RA (J2000) : 18 20 55.15 (10.37241)
- Dec (J2000): +10 22 20.7 ( 10.37257)
- Error (90%): 1.9
- Counts in Source: 182

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′′	275.22978	10.37221	GCN #32077	GRB 220521A: Prompt enhanced Swift-XRT position
0.6′′	275.22971	10.37236	GCN #32078	GRB 220521A: NOT optical afterglow detection
0.7′′	275.22967	10.37237	GCN #32110	GRB 220521A: ALMA detection
1.7′′	275.22990	10.37175	GCN #32081	GRB 220521A: Enhanced Swift-XRT position
3.4′′	275.22892	10.37261	GCN #32076	GRB 220521A: Swift detection of a burst
41.7′′	275.21800	10.37200	GCN #32090	GRB 220521A: Swift-BAT refined analysis
123.6′′	275.19700	10.38400	GCN #32074	Swift GRB220521.97: Global MASTER-Net observations report
160.7′′	275.26987	10.35131	GCN #32088	GRB 220521A: Sintesz-Newton/CrAO optical upper limit
160.7′′	275.26987	10.35131	GCN #32103	GRB 220521A: ISON-Castelgrande observatory optical observations

There are 17 matches in total. See the full table for details.

Catalogue Searches. Searched 200′ 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
87.9	275.2436	10.3925	2MASX J18205846+1023329	H=14.427, J=15.080, K=13.468

* 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*		Catalogue
20.5	275.2274	10.3670	B1=19.4, B2=19.9, R1=18.0, R2=18.4	USNO-B1
26.0	275.2283	10.3650		NED
26.6	275.2284	10.3649	B1=20.6, B2=19.6, I=16.1, R2=17.1	USNO-B1
26.9	275.2283	10.3650		NED
33.8	275.2312	10.3631		NED
34.7	275.2221	10.3783		NED
35.9	275.2396	10.3733		NED
38.6	275.2387	10.3786		NED
40.0	275.2400	10.3681		NED
40.7	275.2342	10.3827	B1=20.2, B2=20.1, R2=18.5	USNO-B1

Queried APM-N, SDSS, PSCz, SSS, NED, 2MASSX, USNO-B1.

There are 505 galaxies within the position error. The full list is here.

* RA/Dec in equinox J2000

Magnitudes depend on the catalogue. e.g. For Sloan, R is the Sloan r mag, not the Johnson R from APM, for example

Stars

	RA*	Dec*		Catalogue
22.3	275.2251	10.3764	R1=18.9, R2=18.6	USNO-B1
23.3	275.2277	10.3661	B1=19.8, B2=18.9, I=17.1, R1=17.1	USNO-B1
24.9	275.2366	10.3738	I=17.6, R1=19.1, R2=18.7	USNO-B1
26.0	275.2283	10.3651	h=13.8, j=14.5, k=13.6	2MASS
28.2	275.2377	10.3724	B1=20.3, B2=19.9, I=17.5, R1=18.8, R2=18.4	USNO-B1
31.1	275.2213	10.3701	B1=20.0, B2=19.6, I=17.5, R1=18.3, R2=18.2	USNO-B1
31.6	275.2386	10.3709	B1=20.8, B2=20.0, R1=19.1, R2=18.7	USNO-B1
34.2	275.2314	10.3628	B1=16.6, B2=16.8, I=15.3, R1=15.8, R2=15.5	USNO-B1
34.3	275.2314	10.3628	h=13.6, j=13.9, k=13.5	2MASS
34.7	275.2223	10.3785	h=15.8, j=16.5, k=15.8	2MASS

Queried USNO-B1, SDSS, 2MASS.

There are 623 stars within the position error. The full list is here.

* RA/Dec in equinox J2000

Magnitudes depend on the catalogue. e.g. For Sloan, R is the Sloan r mag, not the Johnson R from APM, for example.