Swift Trigger: 1297508

Presumed name: GRB 250321A

BAT	19^h 40^m 18.48^s, +21° 02′ 27.6″
position:	(295.077, +21.041 ± 180″)
XRT	19^h 40^m 23.70^s, +21° 02′ 27.5″
position:	(295.09877, 21.04096 ± 3.9″)
UVOT	No position available.
Galactic N_HI:	9.89×10²¹ cm^-2
Galactic E(B-V):	4.817 mag

Best RA:	19^h 40^m 23.70^s	= 295.09877 d
Best Dec:	+21° 02′ 27.5″	= 21.04096 d

Gal Lat:	-0.69
Gal Long:	57.11

Sun angle:	66.91°, 4.4 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 1 SPER messages, and 1 objects have been found

- Object 1
- RA (J2000) : 19 40 23.70 ( 295.09877)
- Dec (J2000): +21 02 27.5 ( 21.04096)
- Error (90%): 3.888"
- Counts in Source: 34

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 BAT 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
41.3	295.0884	21.0454	Gaia DR3 1826091524417920512	G=20.827333
49.3	295.0754	21.0546	2MASS J19401808+2103166	G=18.010757, H=11.278, J=12.767, K=10.700
57.9	295.0807	21.0567	ZTF J194019.36+210324.0	G=13.549129, H=6.717, J=8.093, K=6.128, g=19.562, r=15.879
87.1	295.0576	21.0250	ATO J295.0575+21.0249	G=13.625747, H=11.019, J=11.358, K=10.890, R=13.992, g=15.037, r=13.675
91.7	295.1039	21.0453	ZTF J194024.93+210243.0	G=17.929285, g=20.309, r=18.235
100.9	295.0935	21.0176	ZTF J194022.42+210103.2	G=18.549225, g=20.562, r=18.687
113.5	295.0957	21.0147	2MASS J19402297+2100530	G=18.362270, H=9.879, J=11.739, K=9.029
119.6	295.0895	21.0721	2MASS J19402147+2104196	G=17.295490, H=11.481, J=12.693, K=11.001
137.3	295.0752	21.0029	ZTF J194018.05+210010.4	r=20.590
137.8	295.1063	21.0142	Gaia DR3 1826088500757726976	G=19.251417

There are 15 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
6.2	295.0750	21.0414	NED
7.7	295.0792	21.0417	NED
11.6	295.0792	21.0386	NED
14.3	295.0813	21.0406	NED
16.7	295.0808	21.0439	NED
16.7	295.0771	21.0456	NED
16.9	295.0746	21.0450	NED
18.2	295.0746	21.0456	NED
20.9	295.0746	21.0464	NED
21.5	295.0833	21.0419	NED

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

There are 1146 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
6.2	295.0752	21.0414	h=13.7, j=14.9, k=13.3	2MASS
7.7	295.0792	21.0416	B1=19.8, B2=18.8, I=16.2, R1=16.9, R2=17.1	USNO-B1
7.7	295.0792	21.0415	h=13.7, j=14.4, k=13.5	2MASS
9.8	295.0742	21.0418	B1=20.4, I=18.2	USNO-B1
11.6	295.0792	21.0385	h=15.2, j=16.2, k=14.6	2MASS
14.3	295.0812	21.0404	h=15.3, j=16.0, k=14.7	2MASS
15.3	295.0813	21.0397	B1=20.4, R2=19.4	USNO-B1
16.7	295.0810	21.0438	h=15.1, j=16.2, k=14.8	2MASS
16.7	295.0772	21.0456	h=14.4, j=15.7, k=13.8	2MASS
16.9	295.0746	21.0451	h=13.4, j=14.6, k=12.9	2MASS

Queried USNO-B1, SDSS, 2MASS.

There are 1230 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.