Swift Trigger: 1072990

Presumed name: GRB 210912A

BAT	08^h 39^m 04.56^s, +79° 11′ 38.4″
position:	(129.769, 79.194 ± 180″)
XRT	08^h 39^m 32.06^s, +79° 13′ 22.5″
position:	(129.88358, 79.22292 ± 7.5″)
UVOT	No position available.
Galactic N_HI:	2.24×10²⁰ cm^-2
Galactic E(B-V):	0.023 mag

Best RA:	08^h 39^m 32.06^s	= 129.88358 d
Best Dec:	+79° 13′ 22.5″	= 79.22292 d

Gal Lat:	31.57
Gal Long:	134.21

Sun angle:	77.74°, 2.7 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 3 SPER messages, and 1 objects have been found

- Object 1
- RA (J2000) : 08 39 32.64 ( 129.88599)
- Dec (J2000): +79 13 22.0 ( 79.22279)
- Error (90%): 7.565"
- Counts in Source: 51

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′′	129.88358	79.22292	GCN #30820	GRB 210912A: Swift detection of a burst
6.7′′	129.88990	79.22148	GCN #30830	GRB 210912A: Enhanced Swift-XRT position
7.3′′	129.89172	79.22158	GCN #30829	GRB 210912A: Host-galaxy candidate in PanSTARRS
8.0′′	129.89292	79.22153	GCN #30844	GRB 210912A: BOOTES-5/JGT optical afterglow candidate (Correction to GCNC 30823)
8.0′′	129.89292	79.22153	GCN #30823	GRB 210912A: BOOTES-5/JGT optical afterglow candidate
8.2′′	129.89279	79.22142	GCN #30832	GRB 210912A: Swift/UVOT Detection
24.1′′	129.87375	79.21647	GCN #30839	GRB 210912A: Swift-BAT refined analysis
71.7′′	129.80109	79.21031	GCN #30825	GRB 210912A: Mondy optical afterglow confirmation

There are 14 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

* 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
4.2	129.8788	79.2222		NED
9.7	129.8972	79.2238	B=21.6, R=20.0	APM-N
11.2	129.8904	79.2200		NED
20.0	129.9100	79.2256		NED
21.5	129.9121	79.2203		NED
22.0	129.8571	79.2194		NED
23.3	129.8621	79.2281		NED
24.5	129.8700	79.2167		NED
29.8	129.8442	79.2267	B1=21.1, I=18.1	USNO-B1
35.2	129.9286	79.2279	B=21.6, R=19.6	APM-N

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

There are 280 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
49.0	129.8375	79.2335	B2=20.4, R1=19.8	USNO-B1
49.6	129.8533	79.2355	h=15.1, j=15.6, k=15.0	2MASS
50.0	129.8531	79.2356	B1=20.1, B2=20.4, I=17.2, R1=18.2, R2=17.9	USNO-B1
50.7	129.9208	79.2352	B1=20.8, B2=21.0, R1=20.0, R2=19.4	USNO-B1
68.3	129.8401	79.2401	I=18.0, R2=18.3	USNO-B1
69.8	129.9331	79.2400	h=14.8, j=15.5, k=14.6	2MASS
69.8	129.9328	79.2400	B1=19.5, B2=19.4, I=16.8, R1=16.9, R2=17.5	USNO-B1
71.7	129.8011	79.2103	B1=16.4, B2=17.3, I=15.4, R1=15.9, R2=15.9	USNO-B1
72.0	129.8112	79.2082	h=15.8, j=16.4, k=16.2	2MASS
72.0	129.8110	79.2082	B1=17.9, B2=18.3, I=17.4, R1=17.2, R2=16.9	USNO-B1

Queried USNO-B1, SDSS, 2MASS.

There are 97 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.