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Swift Trigger: 770528

Presumed name: GRB 170903A

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

BAT	16h 58m 02.88s, +34° 58′ 58.8″
position:	(254.512, 34.983 ± 180″)
XRT	16h 58m 06.24s, +34° 58′ 46.6″
position:	(254.5260, 34.9796 ± 2.1″)
UVOT	No position available.
Galactic NHI:	1.65×100 cm-2
Galactic E(B-V):	0.018 mag

Best RA:	16h 58m 06.24s	= 254.5260 d
Best Dec:	+34° 58′ 46.6″	= 34.9796 d
Gal Lat:	37.41
Gal Long:	57.71
Sun angle:	87.42°, -6.1 hr East of Sun

¹Sper #11 auto processing.

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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

Blink images with DSS (link via GSFC)

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XRT SPER data

SPER results page for this trigger.

There are 15 SPER messages, and 1 objects have been found

• • Object 1 - enhanced position.
  • RA (J2000) : 16 58 06.23 (34.9794)
  • Dec (J2000): +34 58 45.8 ( 34.97915)
  • Error (90%): 2.1
  • Counts in Source: 173

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
0.0′′	254.52600	34.97960		GCN #21794	GRB 170903A: Swift-XRT observations
2.7′′	254.52613	34.97887		GCN #21797	GRB 170903A: Enhanced Swift-XRT position
26.3′′	254.53200	34.98500		GCN #21796	GRB 170903A: Swift-BAT refined analysis
27.6′′	254.53208	34.98542		GCN #21813	GCN GRB 170903A
42.4′′	254.51250	34.98361		GCN #21793	GRB 170903A: Swift detection of a burst

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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

* 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
6.8	254.5258	34.9778		Mag=23.3	NED
11.2	254.5279	34.9822		Mag=23.6	NED
13.7	254.5291	34.9768		B=22.1, R=20.0	APM-N
14.8	254.5224	34.9767		R=22.7, g=23.2, i=22.2, u=22.6, z=22.9	SDSS
14.8	254.5225	34.9767		Mag=23.3	NED
17.3	254.5292	34.9836		Mag=23.3	NED
18.1	254.5199	34.9803		R=22.3, g=24.4, i=21.6, u=24.7, z=20.9	SDSS
18.1	254.5200	34.9803		Mag=24.4	NED
18.4	254.5198	34.9802		R=22.1, g=23.8, i=21.6, u=23.3, z=20.8	SDSS
19.8	254.5200	34.9822		Mag=22.0	NED

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

There are 637 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
6.9	254.5260	34.9777	I=21.5, R=22.0, g=23.4, u=25.2, z=21.0	SDSS
7.0	254.5261	34.9776	I=21.5, R=21.9, g=23.2, u=24.5, z=21.3	SDSS
11.2	254.5278	34.9823	I=21.4, R=22.0, g=23.1, u=23.4, z=20.8	SDSS
11.2	254.5279	34.9823	I=21.6, R=22.1, g=23.6, u=24.5, z=20.6	SDSS
19.8	254.5200	34.9821	I=19.8, R=20.6, g=21.9, u=24.1, z=19.3	SDSS
19.8	254.5201	34.9822	I=19.8, R=20.6, g=22.0, u=24.2, z=19.4	SDSS
22.5	254.5297	34.9741	I=24.2, R=25.2, g=24.2, u=25.9, z=21.2	SDSS
23.2	254.5278	34.9859	I=21.8, R=22.4, g=23.3, u=23.1, z=21.3	SDSS
24.1	254.5341	34.9787	I=20.9, R=21.4, g=22.8, u=25.1, z=20.7	SDSS
24.2	254.5341	34.9787	I=21.0, R=21.4, g=22.8, u=24.0, z=20.6	SDSS

Queried USNO-B1, SDSS, 2MASS.

There are 425 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.