Swift Trigger: 1347179

Presumed name: GRB 250904A

BAT	05^h 37^m 25.92^s, +03° 35′ 02.4″
position:	(84.358, +3.584 ± 180″)
XRT	05^h 37^m 31.25^s, +03° 35′ 04.8″
position:	(84.38019, 3.58466 ± 2.2″)
UVOT	No position available.
Galactic N_HI:	2.08×10²¹ cm^-2
Galactic E(B-V):	0.316 mag

Best RA:	05^h 37^m 31.25^s	= 84.38019 d
Best Dec:	+03° 35′ 04.8″	= 3.58466 d

Gal Lat:	-14.66
Gal Long:	201.01

Sun angle:	78.77°, 5.3 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) : 05 37 31.25 (3.58466)
- Dec (J2000): +03 35 04.8 ( 3.58520)
- Error (90%): 2.2
- Counts in Source: 110

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	Date reported	Source	Misc	Query

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
135.5	84.3753	3.5473	Gaia DR3 3224154983294537472	G=18.388742

* RA/Dec in equinox J2000

X-ray sources

	RA*	Dec*		Source table²	Observatory	Query
187.2	84.3397	3.5520	0.0794669315 +/- 0.02938519418	SRG-EROSIT

Queried the X-ray MASTER catalogue.

* RA/Dec in equinox J2000

¹Energy band for count-rate is mission specific.

Galaxies

	RA*	Dec*		Catalogue
9.9	84.3829	3.5839		NED
13.4	84.3817	3.5881		NED
15.2	84.3762	3.5828		NED
24.4	84.3771	3.5786		NED
26.0	84.3838	3.5784	I=18.3, R1=18.9	USNO-B1
26.0	84.3838	3.5783		NED
26.1	84.3729	3.5828		NED
28.9	84.3738	3.5894		NED
30.6	84.3875	3.5889		NED
30.7	84.3875	3.5806		NED

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

There are 197 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
10.3	84.3829	3.5839	B1=19.5, B2=18.6, I=16.7, R1=17.5, R2=17.5	USNO-B1
10.4	84.3830	3.5838	h=15.4, j=16.1, k=15.1	2MASS
23.7	84.3769	3.5790	B1=20.3, B2=20.0, I=18.6, R1=19.1, R2=19.2	USNO-B1
28.9	84.3738	3.5895	h=15.7, j=16.3, k=15.9	2MASS
29.1	84.3738	3.5896	B1=18.9, B2=18.3, I=17.4, R1=17.7, R2=17.5	USNO-B1
37.1	84.3726	3.5917	h=15.1, j=15.6, k=14.8	2MASS
37.3	84.3726	3.5917	B1=20.4, B2=20.4, I=17.0, R1=18.5, R2=18.7	USNO-B1
39.1	84.3911	3.5845	B1=17.9, B2=17.3, I=16.1, R1=16.4, R2=16.5	USNO-B1
39.2	84.3911	3.5845	h=15.0, j=15.4, k=14.8	2MASS
42.6	84.3886	3.5763	B2=20.8, I=17.9, R1=18.9, R2=19.8	USNO-B1

Queried USNO-B1, SDSS, 2MASS.

There are 181 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.