Swift Trigger: 1343270

Presumed name: GRB 250818A

BAT	14^h 15^m 19.92^s, -58° 00′ 25.2″
position:	(213.833, -58.007 ± 180″)
XRT	14^h 15^m 12.05^s, -58° 00′ 48.2″
position:	(213.8002, -58.0134 ± 4.9″)
UVOT	No position available.
Galactic N_HI:	5.37×10²¹ cm^-2
Galactic E(B-V):	1.609 mag

Best RA:	14^h 15^m 12.05^s	= 213.8002 d
Best Dec:	-58° 00′ 48.2″	= -58.0134 d

Gal Lat:	3.07
Gal Long:	313.86

Sun angle:	89.31°, -4.4 hr East of Sun

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 1 SPER messges, but no object has been found.

See the SPER page for details of how the SPER image is searched for objects.

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
80.9	213.7611	-58.0047	Gaia DR3 5891930802052307584	G=18.321907
126.4	213.7348	-58.0078	TYC 8686-306-1	B=12.46, G=11.962758, H=10.777, J=10.952, K=10.665, V=12.41
177.1	213.8836	-58.0350	2MASS J14153209-5802060	G=14.017729, H=7.396, J=8.637, K=6.767
185.9	213.7755	-58.0634	2MASS J14150613-5803480	G=13.714654, H=8.331, J=9.577, K=7.921
188.4	213.8135	-57.9615	TYC 8686-788-1	B=12.24, G=10.582659, H=7.969, J=8.591, K=7.841, V=11.02
189.6	213.7677	-57.9636	IRAS 14115-5743	H=14.545, K=9.999

There are 6 SIMBAD objects within the position error. The full list is here.

* 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
3.7	213.7992	-58.0125		NED
14.5	213.8025	-58.0097		NED
15.4	213.8067	-58.0111		NED
16.1	213.8028	-58.0091	B2=18.9, R2=17.3	USNO-B1
16.8	213.7971	-58.0178		NED
17.7	213.7979	-58.0181		NED
17.8	213.8067	-58.0169		NED
17.9	213.8067	-58.0170	B2=20.5, I=17.2, R2=17.9	USNO-B1
18.3	213.8046	-58.0181		NED
19.1	213.8017	-58.0081		NED

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

There are 1204 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
14.5	213.8028	-58.0096	h=14.9, j=15.5, k=14.6	2MASS
14.9	213.8029	-58.0095	B2=20.6, I=16.9, R1=18.1, R2=17.3	USNO-B1
15.3	213.8069	-58.0110	h=14.7, j=15.4, k=14.6	2MASS
15.7	213.8070	-58.0109	B2=20.3, I=17.1, R1=18.1, R2=18.1	USNO-B1
16.6	213.7972	-58.0177	B2=19.0, I=16.6, R1=16.9, R2=17.6	USNO-B1
16.8	213.7971	-58.0178	h=15.1, j=15.6, k=14.9	2MASS
17.7	213.8070	-58.0168	B2=19.6, I=15.3, R2=17.8	USNO-B1
17.8	213.8068	-58.0169	h=15.0, j=15.7, k=15.0	2MASS
18.3	213.8046	-58.0179	h=14.7, j=15.2, k=14.6	2MASS
18.4	213.8046	-58.0180	B2=18.6, I=15.9, R1=16.6, R2=16.9	USNO-B1

Queried USNO-B1, SDSS, 2MASS.

There are 1325 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.