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Home > GRB region information > 1285677

Swift Trigger: 1285677

Presumed name: GRB 250128B

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

BAT	15h 25m 40.80s, -00° 31′ 01.2″
position:	(231.420, -0.517 ± 180″)
XRT	15h 25m 42.12s, -00° 32′ 22.2″
position:	(231.42552, -0.53950 ± 1.9″)
UVOT	No position available.
Galactic NHI:	5.70×1020 cm-2
Galactic E(B-V):	0.110 mag

Best RA:	15h 25m 42.12s	= 231.42552 d
Best Dec:	-00° 32′ 22.2″	= -0.53950 d
Gal Lat:	43.75
Gal Long:	2.59
Sun angle:	80.02°, 5.3 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 11 SPER messages, and 1 objects have been found

• • Object 1 - enhanced position.
  • RA (J2000) : 15 25 42.12 (-0.53950)
  • Dec (J2000): -00 32 22.2 ( -0.53904)
  • Error (90%): 1.9
  • Counts in Source: 50

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
171.6	231.4333	-0.5865	TYC 5003-761-1	B=12.05, G=11.300679, H=9.619, J=9.956, K=9.507, V=11.39
185.0	231.4754	-0.5520	Gaia DR3 4417000270500845952	G=19.790491
189.9	231.3944	-0.5821	TYC 5003-251-1	B=12.642, G=11.023430, H=8.589, J=9.202, K=8.47, V=11.417, g=11.998, i=10.570, r=11.004

There are 3 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*	Redshift		Catalogue	Query
12.7	231.4262	-0.5431		Mag=20.1	NED
12.7	231.4261	-0.5430		R=21.0, g=21.7, i=22.0, u=22.8, z=20.0	SDSS
17.0	231.4254	-0.5347			NED
19.0	231.4204	-0.5389		Mag=23.3	NED
26.6	231.4258	-0.5322		Mag=23.2	NED
26.7	231.4258	-0.5321		R=21.3, g=23.1, i=20.3, u=24.9, z=19.3	SDSS
26.7	231.4257	-0.5321		R=21.8, g=24.2, i=20.6, u=25.1, z=20.3	SDSS
27.4	231.4279	-0.5322			NED
27.5	231.4287	-0.5328		Mag=20.7	NED
27.9	231.4290	-0.5325		B=21.7, R=20.0	APM-N

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

There are 509 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
19.0	231.4203	-0.5389	I=20.2, R=21.7, g=23.2, u=24.9, z=19.2	SDSS
19.2	231.4202	-0.5389	I=20.1, R=21.6, g=23.3, u=24.5, z=19.2	SDSS
20.4	231.4199	-0.5402	I=23.9, R=25.6, g=25.0, u=25.1, z=19.8	SDSS
24.7	231.4317	-0.5424	I=21.7, R=22.9, g=24.4, u=25.5, z=21.2	SDSS
24.9	231.4318	-0.5424	I=22.0, R=23.1, g=25.2, u=23.1, z=21.3	SDSS
27.5	231.4289	-0.5326	I=19.9, R=20.2, g=20.7, u=21.8, z=19.6	SDSS
27.5	231.4289	-0.5326	I=19.9, R=20.1, g=20.7, u=22.2, z=19.7	SDSS
31.4	231.4184	-0.5445	I=18.3, R1=19.0, R2=19.2	USNO-B1
34.3	231.4242	-0.5489	h=14.1, j=14.8, k=14.0	2MASS
34.5	231.4242	-0.5490	I=16.5, R=17.1, g=18.5, u=21.9, z=16.1	SDSS

Queried USNO-B1, SDSS, 2MASS.

There are 376 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.