Swift Trigger: 349510

Presumed name: GRB 090418A

BAT	17^h 57^m 20.16^s, +33° 24′ 32.4″
position:	(269.334, +33.409 ± 180″)
XRT	17^h 57^m 15.10^s, +33° 24′ 19.8″
position:	(269.3129, 33.4055 ± 2.1″)
UVOT	No position available.
Galactic N_HI:	0.00×10⁰ cm^-2
Galactic E(B-V):	0.043 mag

Best RA:	17^h 57^m 15.10^s	= 269.3129 d
Best Dec:	+33° 24′ 19.8″	= 33.4055 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′′	269.31290	33.40550	GCN #9149	GRB 090418: Swift detection of a burst with optical afterglow
1.2′′	269.31315	33.40577	GCN #9166	VLA radio detection of GRB 090418
1.3′′	269.31313	33.40581	GCN #9211	GRB090418A Rc-band photometry
1.6′′	269.31321	33.40586	GCN #9175	GRB 090418A: Swift/UVOT Observations
1.6′′	269.31321	33.40586	GCN #9148	GRB 090418 OA candidate
1.6′′	269.31321	33.40587	GCN #9179	GRB 090418A: optical observations
2.3′′	269.31329	33.40606	GCN #9163	GRB 090418: Swift XRT refined analysis
2.3′′	269.31329	33.40606	GCN #9154	GRB 090418: Enhanced Swift-XRT position
21.8′′	269.32000	33.40678	GCN #9157	GRB 090418: Swift-BAT refined analysis
183.1′′	269.32687	33.35600	GCN #32378	Fermi GRB 220711B: Global MASTER-Net observations report

There are 18 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		Query
1.6	269.3132	33.4059	GRB 090418A
116.6	269.3513	33.4008	HD 163948	B=7.790, H=4.842, J=5.282, K=4.762, U=8.380, V=6.880

* 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
1.2	269.3129	33.4058		NED
3.8	269.3141	33.4052	B=21.8, R=20.0	APM-N
4.3	269.3143	33.4055	B1=20.9, B2=20.8, R2=20.2	USNO-B1
12.2	269.3132	33.4021	B=21.2, R=20.0	APM-N
20.1	269.3180	33.4019	B=21.3, R=18.9	APM-N
39.6	269.3249	33.4009	B1=20.7, R2=17.9	USNO-B1
41.4	269.3003	33.4009	B2=20.9, I=18.7, R1=19.5	USNO-B1
41.7	269.2999	33.4014	B=22.0, R=20.0	APM-N
60.9	269.3105	33.4223	B2=20.8, I=17.7, R1=18.7, R2=19.1	USNO-B1
61.5	269.3326	33.4007	B1=20.4, I=16.9, R1=18.0	USNO-B1

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

There are 93 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
20.4	269.3158	33.4004	B1=20.4, B2=20.7, R2=19.8	USNO-B1
20.6	269.3174	33.4098	h=16.0, j=16.6, k=16.0	2MASS
20.6	269.3172	33.4100	B1=18.6, B2=18.3, I=17.2, R1=17.4, R2=17.2	USNO-B1
20.8	269.3179	33.4015	B1=20.8, B2=19.7, R1=18.9, R2=20.0	USNO-B1
27.1	269.3196	33.4004	B2=20.3, I=18.6, R1=18.3	USNO-B1
31.8	269.3214	33.4002	B2=20.1, I=18.5, R1=19.8, R2=19.4	USNO-B1
31.8	269.3076	33.3978	B2=20.9, I=18.8	USNO-B1
34.7	269.3226	33.4003	B1=20.8, B2=19.5, I=18.0, R1=19.5, R2=19.3	USNO-B1
42.8	269.3101	33.3938	B1=17.3, B2=17.1, I=14.5, R1=15.3, R2=15.2	USNO-B1
43.1	269.3101	33.3938	h=12.5, j=13.2, k=12.3	2MASS

Queried USNO-B1, SDSS, 2MASS.

There are 170 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.