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Home > GRB region information > 1311764

Swift Trigger: 1311764

Presumed name: GRB 250509A

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Related pages: Burst Analyser | Enhanced position | Light curve | Spectrum | Image | XRT Catalogue entry | Download obs data | GCN Notices

BAT	03h 05m 49.20s, -38° 51′ 10.8″
position:	(46.455, -38.853 ± 180″)
XRT	03h 05m 47.90s, -38° 50′ 29.0″
position:	(46.44960, -38.84138 ± 1.9″)
UVOT	No position available.
Galactic NHI:	1.92×1020 cm-2
Galactic E(B-V):	0.019 mag

Best RA:	03h 05m 47.90s	= 46.44960 d
Best Dec:	-38° 50′ 29.0″	= -38.84138 d
Gal Lat:	-59.7
Gal Long:	244.26
Sun angle:	56.37°, 0.0 hr West

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GCN Notices for this burst.

View this region in Aladin.

Observability of this burst for Swift.

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Sun angle for this burst.

UVOT data

No UVOT images are currently available.

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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) : 03 05 47.90 (-38.84138)
  • Dec (J2000): -38 50 29.0 ( -38.84169)
  • Error (90%): 1.9
  • Counts in Source: 130

See the SPER page for details of how this position was produced.

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Known transients within 5′ of the GRB

Click on the offset to view the transient announcement.

Offset (′′)	RA	Dec	Date reported	Source	Misc	Query

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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
47.6	46.4558	-38.8291	2MASX J03054936-3849445	G=21.159456, H=14.472, J=15.140, K=14.050
134.6	46.4669	-38.8065	NVSS J030552-384821
148.6	46.4894	-38.8141	LCRS B030402.6-390024
177.0	46.4648	-38.8891	LCLG-39 092
179.9	46.4051	-38.8054	NVSS J030537-384818

There are 5 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
163.1	46.4006	-38.8170	0.0276788883 +/- 0.0129893031	SRG-EROSIT

Queried the X-ray MASTER catalogue.

* RA/Dec in equinox J2000

¹Energy band for count-rate is mission specific.

Galaxies

	RA*	Dec*	Redshift		Catalogue	Query
8.9	46.4513	-38.8433			NED
9.8	46.4525	-38.8399		B=20.3, R2=19.7, i=18.9	SSS
10.3	46.4525	-38.8397		Mag=20.23	NED
20.2	46.4567	-38.8400			NED
21.2	46.4429	-38.8386			NED
21.9	46.4542	-38.8461			NED
24.4	46.4413	-38.8433			NED
26.7	46.4588	-38.8433		R1=20.8, R2=20.6	USNO-B1
26.9	46.4588	-38.8433			NED
28.7	46.4425	-38.8356			NED

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

There are 249 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	Query
10.0	46.4526	-38.8398	B2=20.3, I=18.6, R1=20.2, R2=20.4	USNO-B1
29.4	46.4424	-38.8354	B2=21.3, R1=20.9, R2=20.7	USNO-B1
39.8	46.4545	-38.8310	B2=20.9, R1=20.6, R2=20.6	USNO-B1
40.6	46.4519	-38.8302	B2=21.0, R1=20.9	USNO-B1
43.5	46.4634	-38.8359	B2=20.7, R1=20.8, R2=20.6	USNO-B1
44.8	46.4406	-38.8311	B2=20.1, R1=20.2, R2=19.9	USNO-B1
46.9	46.4533	-38.8287	B2=20.9, R1=20.7	USNO-B1
47.4	46.4558	-38.8291	h=15.6, j=16.1, k=14.7	2MASS
47.6	46.4558	-38.8291	B2=14.9, I=15.6, R1=15.0, R2=15.1	USNO-B1
48.0	46.4330	-38.8447	B2=21.1, I=18.6, R1=20.4, R2=20.6	USNO-B1

Queried USNO-B1, SDSS, 2MASS.

There are 63 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.