Swift Trigger: 1163119

Presumed name: GRB 230405B

BAT	18^h 05^m 52.08^s, -47° 04′ 12.0″
position:	(271.467, -47.070 ± 180″)
XRT	18^h 05^m 45.84^s, -47° 04′ 10.8″
position:	(271.44100, -47.06967 ± 1.9″)
UVOT	No position available.
Galactic N_HI:	1.06×10²¹ cm^-2
Galactic E(B-V):	0.149 mag

Best RA:	18^h 05^m 45.84^s	= 271.44100 d
Best Dec:	-47° 04′ 10.8″	= -47.06967 d

Gal Lat:	-12.35
Gal Long:	346.05

Sun angle:	103.13°, 6.8 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 7 SPER messages, and 1 objects have been found

- Object 1 - enhanced position.
- RA (J2000) : 18 05 45.84 (-47.06977)
- Dec (J2000): -47 04 11.2 ( -47.06951)
- Error (90%): 1.9
- Counts in Source: 779

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	Source	Misc
0.4′′	271.44100	-47.06977	GCN #33572	GRB 230405B: Prompt enhanced Swift-XRT position
1.1′′	271.44063	-47.06983	GCN #33574	GRB 230405B: Enhanced Swift-XRT position
2.5′′	271.44108	-47.06898	GCN #33571	GRB 230405B: Swift detection of a burst

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
132.6	271.4370	-47.0329	TYC 8361-250-1	B=12.46, G=12.172691, H=11.381, J=11.507, K=11.32, V=12.34
184.4	271.3889	-47.0328	TYC 8361-148-1	B=12.15, G=11.866352, H=10.907, J=11.092, K=10.825, V=12.01

* 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
4.3	271.4426	-47.0701	B=21.8	SSS
9.2	271.4445	-47.0688	B=19.6, R2=18.2, i=17.7	SSS
10.8	271.4452	-47.0687	B2=20.3, R2=19.2	USNO-B1
11.7	271.4376	-47.0720	B2=17.8, I=17.1, R1=17.6, R2=17.6	USNO-B1
11.9	271.4404	-47.0664		NED
12.4	271.4405	-47.0663	B2=17.6, I=16.6, R1=17.0, R2=16.8	USNO-B1
18.8	271.4387	-47.0746	B=21.9, R2=19.8	SSS
20.8	271.4427	-47.0753	B2=17.6, I=16.7, R1=17.0, R2=17.2	USNO-B1
21.1	271.4425	-47.0753		NED
21.9	271.4484	-47.0730	B2=19.1, R1=18.8	USNO-B1

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

There are 731 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
8.4	271.4442	-47.0688	B2=18.9, I=18.5, R1=18.3, R2=18.4	USNO-B1
12.0	271.4406	-47.0664	h=15.6, j=15.9, k=15.6	2MASS
21.1	271.4426	-47.0754	h=15.7, j=16.0, k=15.3	2MASS
21.4	271.4323	-47.0693	B2=21.1, R2=20.7	USNO-B1
23.5	271.4317	-47.0681	B2=18.2, I=18.0, R1=18.3, R2=18.5	USNO-B1
23.6	271.4361	-47.0641	B2=18.2, R1=18.6, R2=19.3	USNO-B1
24.3	271.4328	-47.0659	h=15.4, j=15.9, k=15.3	2MASS
25.0	271.4327	-47.0657	B2=16.8, I=15.6, R1=16.1, R2=16.4	USNO-B1
26.8	271.4515	-47.0717	B2=19.7, R1=19.1	USNO-B1
27.7	271.4321	-47.0650	B2=16.9, I=15.2, R1=15.5, R2=15.7	USNO-B1

Queried USNO-B1, SDSS, 2MASS.

There are 908 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.