Swift Trigger: 948361

Presumed name: GRB 200109A

BAT	20^h 28^m 41.04^s, +53° 00′ 10.8″
position:	(307.171, +53.003 ± 180″)
XRT	20^h 28^m 30.19^s, +52° 59′ 35.5″
position:	(307.1258, 52.9932 ± 2.2″)
UVOT	No position available.
Galactic N_HI:	2.59×10⁰ cm^-2
Galactic E(B-V):	0.385 mag

Best RA:	20^h 28^m 30.19^s	= 307.1258 d
Best Dec:	+52° 59′ 35.5″	= 52.9932 d

Gal Lat:	8.28
Gal Long:	89.26

Sun angle:	76.79°, -1.2 hr East of Sun

¹Sper #3 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 9 SPER messages, and 1 objects have been found

- Object 1 - enhanced position.
- RA (J2000) : 20 28 30.21 (52.9932)
- Dec (J2000): +52 59 35.5 ( 52.99327)
- Error (90%): 2.2
- Counts in Source: 156

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′′	307.12580	52.99320	GCN #26678	GRB 200109A: Swift detection of a burst
3.0′′	307.12462	52.99363	GCN #26681	GRB 200109A: Enhanced Swift-XRT position
28.3′′	307.11600	52.98800	GCN #26692	GRB 200109A: Swift-BAT refined analysis
104.1′′	307.17100	53.00300	GCN #26679	Swift GRB200109.07: Global MASTER-Net observations report
141.0′′	307.15950	53.02672	GCN #26680	Fermi trigger No 600227156: Global MASTER-Net observations report

There are 23 matches in total. See the full table for details.

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
149.6	307.1187	52.9519	2MASS J20282849+5257067	G=11.5466, H=9.503, J=9.998, K=9.404

* RA/Dec in equinox J2000

X-ray sources

	RA*	Dec*		Source table²	Observatory	Query
156.6	307.1950	52.9807	0.0070500001311302185 +/- 0.0017000000225380063	ROSAT

Queried the X-ray MASTER catalogue.

* RA/Dec in equinox J2000

¹Energy band for count-rate is mission specific.

Galaxies

	RA*	Dec*		Catalogue
13.6	307.1242	52.9969		NED
16.2	307.1332	52.9940	B2=19.3, I=17.5, R1=17.7, R2=18.5	USNO-B1
16.6	307.1333	52.9933		NED
17.3	307.1337	52.9928		NED
17.8	307.1176	52.9935	B2=20.9, I=18.1, R1=19.0, R2=19.5	USNO-B1
17.9	307.1260	52.9982	B2=20.5, I=18.1, R1=18.6, R2=19.6	USNO-B1
19.1	307.1278	52.9880	B1=19.0, B2=19.0, I=17.5, R1=17.8, R2=18.3	USNO-B1
19.6	307.1275	52.9878		NED
21.8	307.1167	52.9958		NED
22.9	307.1353	52.9903	B1=20.0, B2=20.0, I=17.9, R1=18.6, R2=19.4	USNO-B1

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

There are 721 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
11.7	307.1220	52.9955	B2=20.9, R2=20.2	USNO-B1
13.6	307.1240	52.9968	h=14.5, j=14.9, k=14.5	2MASS
13.8	307.1240	52.9969	B1=17.3, B2=17.3, I=15.6, R1=15.8, R2=16.6	USNO-B1
16.3	307.1332	52.9938	B1=18.7, B2=18.5, I=16.3, R1=16.8, R2=17.6	USNO-B1
16.8	307.1336	52.9931	B2=18.2, I=16.9, R2=17.5	USNO-B1
17.3	307.1338	52.9929	h=15.5, j=16.4, k=16.2	2MASS
21.5	307.1169	52.9958	I=18.0, R2=19.3	USNO-B1
21.9	307.1284	52.9991	I=18.2, R1=19.3, R2=19.3	USNO-B1
22.6	307.1161	52.9908	B1=20.9, B2=20.3, R2=20.0	USNO-B1
30.1	307.1210	52.9854	h=12.3, j=12.9, k=12.2	2MASS

Queried USNO-B1, SDSS, 2MASS.

There are 448 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.