Swift Trigger: 350184

Presumed name: GRB 090423

BAT	09^h 55^m 34.80^s, +18° 09′ 36.0″
position:	(148.895, +18.160 ± 180″)
XRT	09^h 55^m 33.10^s, +18° 08′ 58.9″
position:	(148.8879, 18.1497 ± 2.3″)
UVOT	No position available.
Galactic N_HI:	0.00×10⁰ cm^-2
Galactic E(B-V):	0.029 mag

Best RA:	09^h 55^m 33.10^s	= 148.8879 d
Best Dec:	+18° 08′ 58.9″	= 18.1497 d

Gal Lat:
Gal Long:

Sun angle:	not found

GCN Notices for this burst.

View this region in Aladin.

Observability of this burst for Swift.

Sun angle for this burst.

UVOT data

unknown image

Blink images with DSS (link via GSFC)

XRT SPER data

SPER results page for this trigger.

No SPER data received yet. Refresh this page to check again.

Known transients within 5′ of the GRB

Click on the offset to view the transient announcement.

Offset (′′)	RA	Dec	Source	Misc
0.0′′	148.88790	18.14970	GCN #9198	GRB 090423: Swift detection of a burst
1.8′′	148.88829	18.14936	GCN #9322	GRB 090423: 250 GHz upper limit for a z=8.2 GRB with MAMBO-2 at the IRAM 30m
1.8′′	148.88829	18.14936	GCN #9205	GRB 090423: Enhanced Swift-XRT position
3.0′′	148.88871	18.14939	GCN #9202	GRB 090423: UKIRT K-band observations
3.4′′	148.88875	18.14919	GCN #9218	GRB 090423: Near infrared observation at Okayama Observatory
56.1′′	148.89100	18.16500	GCN #9204	GRB 090423: Swift-BAT refined analysis

There are 11 matches in total. See the full table for details.

Catalogue Searches. Searched 3.33′ 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
1.8	148.8883	18.1494	GRB 090423
31.8	148.8971	18.1511	2MASS J09553530+1809038	H=13.97, J=14.52, K=13.77, g=19.276, i=16.549, r=17.785, u=22.16, z=15.911
152.2	148.8663	18.1867	TYC 1414-418-1	B=11.7, H=8.469, J=8.987, K=8.351, V=10.8
170.0	148.9234	18.1166	HD 85947	B=9.92, H=7.932, J=8.210, K=7.890, V=9.30

There are 4 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
0.2	148.8879	18.1497		NED
4.5	148.8873	18.1508	R=21.6, g=22.6, i=21.4, u=22.8, z=21.9	SDSS
4.5	148.8871	18.1508	Mag=22.8	NED
9.5	148.8902	18.1483	R=24.3, g=25.6, i=23.8, u=24.7, z=20.5	SDSS
13.9	148.8854	18.1467	Mag=22.3	NED
13.9	148.8854	18.1467	R=21.6, g=22.1, i=21.3, u=24.8, z=21.0	SDSS
22.6	148.8904	18.1556	Mag=25.3	NED
22.6	148.8933	18.1464	Mag=22.2	NED
24.2	148.8908	18.1558	B=19.1, R=20.0	APM-N
24.5	148.8878	18.1565	R=23.1, g=24.9, i=21.7, u=23.8, z=22.0	SDSS

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

There are 354 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
7.3	148.8879	18.1477	I=24.1, R=25.7, g=24.3, u=24.2, z=20.9	SDSS
22.5	148.8905	18.1554	I=23.6, R=22.8, g=25.4, u=25.2, z=22.1	SDSS
22.6	148.8936	18.1464	I=20.4, R=20.9, g=22.1, u=23.6, z=20.1	SDSS
25.9	148.8804	18.1489	I=23.7, R=24.9, g=24.8, u=24.5, z=20.8	SDSS
27.8	148.8812	18.1453	I=22.0, R=22.4, g=23.2, u=23.3, z=22.2	SDSS
31.6	148.8970	18.1511	I=16.5, R=17.8, g=19.3, u=22.2, z=15.9	SDSS
31.9	148.8971	18.1512	B1=20.4, B2=19.1, I=15.6, R1=17.8, R2=17.3	USNO-B1
31.9	148.8971	18.1511	h=14.0, j=14.5, k=13.8	2MASS
33.9	148.8833	18.1414	I=23.8, R=23.9, g=26.0, u=22.3, z=23.2	SDSS
35.6	148.8974	18.1456	B2=20.9, I=18.6, R1=19.8, R2=19.5	USNO-B1

Queried USNO-B1, SDSS, 2MASS.

There are 165 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.