Swift Trigger: 1299776

Presumed name: GRB 250330A

BAT	16^h 51^m 09.60^s, -86° 52′ 12.0″
position:	(252.790, -86.870 ± 180″)
XRT	16^h 51^m 48.51^s, -86° 52′ 47.1″
position:	(252.95213, -86.87974 ± 4.0″)
UVOT	No position available.
Galactic N_HI:	8.32×10²⁰ cm^-2
Galactic E(B-V):	0.136 mag

Best RA:	16^h 51^m 48.51^s	= 252.95213 d
Best Dec:	-86° 52′ 47.1″	= -86.87974 d

Gal Lat:	-25.54
Gal Long:	305.93

Sun angle:	95.10°, 7.6 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 8 SPER messages, and 1 objects have been found

- Object 1
- RA (J2000) : 16 51 48.36 ( 252.95152)
- Dec (J2000): -86 52 47.0 ( -86.87973)
- Error (90%): 3.937"
- Counts in Source: 50

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
240.0′′	251.98880	-86.83950		XMM Slew	XMMSL1 J164757.3-865022

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
116.4	252.3828	-86.8706	Gaia DR3 5765411888808092800	G=20.950827
118.8	253.3729	-86.9036	LEDA 216137

* RA/Dec in equinox J2000

X-ray sources

	RA*	Dec*		Source table²
26.9	253.0356	-86.8857	0.0145056 +/- 0.00131133	XMM-NEWTON
28.0	253.0400	-86.8859	0.00966976 +/- 0.000922219	XMM-NEWTON
59.7	253.1767	-86.8910	0.00295768 +/- 0.000789627	XMM-NEWTON
59.9	253.1890	-86.8903	0.00860364 +/- 0.00156612	XMM-NEWTON
60.0	253.1868	-86.8905	0.00459475 +/- 0.000769567	XMM-NEWTON
70.6	252.7430	-86.8957	0.0148466 +/- 0.00187329	XMM-NEWTON
71.2	252.7373	-86.8957	0.0190616 +/- 0.00137026	XMM-NEWTON
71.3	252.7395	-86.8958	0.017755 +/- 0.00113461	XMM-NEWTON
187.0	252.4697	-86.8350	0.00688652 +/- 0.000900812	XMM-NEWTON
187.3	252.4680	-86.8350	0.00765533 +/- 0.000962193	XMM-NEWTON

Queried the X-ray MASTER catalogue.

There are 12 X-ray sources within the position error. The full list is here.

* RA/Dec in equinox J2000

¹Energy band for count-rate is mission specific.

Galaxies

	RA*	Dec*		Catalogue
5.0	252.9338	-86.8789		NED
13.2	253.0187	-86.8792		NED
20.1	252.9537	-86.8742	B2=22.0, R1=19.2, R2=20.3	USNO-B1
20.3	252.9529	-86.8742		NED
24.5	252.8717	-86.8744		NED
27.4	253.0313	-86.8861		NED
29.3	252.9387	-86.8878	B2=20.8, R2=20.1	USNO-B1
37.2	253.1260	-86.8756	B2=18.5, I=17.4, R1=17.2, R2=18.1	USNO-B1
37.3	253.1283	-86.8758		NED
40.3	253.1571	-86.8792		NED

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

There are 371 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
13.4	253.0200	-86.8792	h=15.2, j=15.6, k=15.2	2MASS
13.5	253.0203	-86.8792	B2=18.1, I=16.6, R1=16.3, R2=16.8	USNO-B1
27.8	253.0779	-86.8762	B2=20.1, R1=18.6	USNO-B1
35.7	253.1186	-86.8757	B2=20.9, R1=18.8, R2=20.1	USNO-B1
37.0	253.1252	-86.8757	h=15.9, j=16.7, k=15.2	2MASS
43.3	253.0169	-86.8913	h=11.0, j=11.6, k=11.0	2MASS
43.5	253.0179	-86.8913	B2=14.6, I=11.9, R1=13.1, R2=13.0	USNO-B1
44.2	253.1508	-86.8856	B2=21.3, R1=19.2, R2=19.4	USNO-B1
44.2	252.7482	-86.8745	B2=17.7, I=15.6, R1=15.8, R2=16.4	USNO-B1
44.3	252.7475	-86.8745	h=14.4, j=15.0, k=14.3	2MASS

Queried USNO-B1, SDSS, 2MASS.

There are 228 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.