Swift Trigger: 1000926

Presumed name: GRB 201020A

BAT	17^h 24^m 59.04^s, +31° 25′ 30.0″
position:	(261.246, +31.425 ± 180″)
XRT	17^h 24^m 54.70^s, +31° 25′ 43.7″
position:	(261.2279, 31.4288 ± 2.2″)
UVOT	17^h 24^m 54.65^s, +31° 25′ 41.9″
position:	(261.2277, +31.4283 ± 0.6″)
Galactic N_HI:	3.22×10⁰ cm^-2
Galactic E(B-V):	0.043 mag

Best RA:	17^h 24^m 54.65^s	= 261.2277 d
Best Dec:	+31° 25′ 41.9″	= +31.4283 d

Gal Lat:	31.18
Gal Long:	54.94

Sun angle:	68.10°, -3.7 hr East of Sun

¹Sper #2 auto processing.

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) : 17 24 54.68 (31.4287)
- Dec (J2000): +31 25 43.5 ( 31.42867)
- Error (90%): 2.2
- Counts in Source: 189

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
0.3′′	261.22775	31.42836	GCN #28742	GRB 201020A: Swift/UVOT Observations
0.3′′	261.22779	31.42833	GCN #28696	GRB 201020A: Swift detection of a burst with an optical counterpart.
2.0′′	261.22825	31.42803	GCN #28698	GRB 201020A: Enhanced Swift-XRT position
34.7′′	261.23900	31.42800	GCN #28705	GRB 201020A: Swift-BAT refined analysis

Catalogue Searches. Searched 3.33′ 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
98.5	261.2536	31.4452	SDSS J172500.86+312642.6	G=18.2130, g=18.518, i=18.128, r=18.164, u=19.325, z=17.988
176.1	261.2627	31.4677	TYC 2605-280-1	B=12.00, G=11.3891, H=10.363, J=10.558, K=10.341, V=11.53

* 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
11.4	261.2309	31.4269	R=22.1, g=22.7, i=21.8, u=23.0, z=21.5	SDSS
18.6	261.2262	31.4333		NED
24.3	261.2352	31.4262	B1=20.6, B2=20.4, I=18.4, R1=19.0, R2=19.0	USNO-B1
24.6	261.2350	31.4261		NED
26.4	261.2327	31.4349	R=21.3, g=22.2, i=20.6, u=23.7, z=20.1	SDSS
28.4	261.2325	31.4350		NED
33.9	261.2379	31.4247		NED
35.0	261.2392	31.4298	B1=20.3, B2=21.0	USNO-B1
35.7	261.2391	31.4262	R=24.3, g=22.8, i=25.2, u=24.8, z=21.5	SDSS
35.8	261.2200	31.4358		NED

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

There are 503 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
15.1	261.2269	31.4329	I=20.1, R=20.6, g=21.8, u=24.2, z=19.8	SDSS
15.2	261.2270	31.4330	B2=21.2, I=19.1, R2=20.1	USNO-B1
24.4	261.2352	31.4261	I=18.8, R=19.2, g=20.2, u=22.8, z=18.5	SDSS
28.9	261.2334	31.4223	I=22.1, R=23.0, g=23.0, u=23.5, z=21.8	SDSS
32.1	261.2368	31.4334	I=20.9, R=21.9, g=23.2, u=24.9, z=20.2	SDSS
34.9	261.2200	31.4358	h=16.1, j=17.0, k=16.0	2MASS
35.1	261.2201	31.4359	I=19.5, R=21.4, g=22.9, u=22.8, z=18.4	SDSS
35.3	261.2383	31.4247	I=19.9, R=20.4, g=21.8, u=23.7, z=19.5	SDSS
36.5	261.2397	31.4299	B2=21.1, R1=19.7, R2=19.9	USNO-B1
36.7	261.2398	31.4297	I=19.7, R=20.2, g=21.4, u=25.6, z=19.5	SDSS

Queried USNO-B1, SDSS, 2MASS.

There are 390 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.