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Swift Trigger: 859282

Presumed name: GRB 180904A

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

BAT	18h 17m 00.00s, +46° 37′ 22.8″
position:	(274.250, 46.623 ± 180″)
XRT	18h 16m 59.93s, +46° 37′ 45.8″
position:	(274.2497, 46.6294 ± 2.1″)
UVOT	No position available.
Galactic NHI:	3.00×100 cm-2
Galactic E(B-V):	0.037 mag

Best RA:	18h 16m 59.93s	= 274.2497 d
Best Dec:	+46° 37′ 45.8″	= 46.6294 d
Gal Lat:	25.02
Gal Long:	74.4
Sun angle:	98.81°, -7.4 hr East of Sun

¹Sper #5 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

No UVOT images are currently available.

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XRT SPER data

SPER results page for this trigger.

There are 5 SPER messages, and 1 objects have been found

• • Object 1 - enhanced position.
  • RA (J2000) : 18 16 59.92 (46.6294)
  • Dec (J2000): +46 37 46.0 ( 46.63031)
  • Error (90%): 2.1
  • Counts in Source: 358

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
1.1′′	274.24979	46.62969		GCN #23196	GRB 180904A: Enhanced Swift-XRT position
1.5′′	274.24950	46.62980		GCN #23194	GRB 180904A: Swift detection of a burst
2.3′′	274.24892	46.62975		GCN #23195	GRB 180904A: NOT optical observations� candidate host galaxy
45.3′′	274.26000	46.63981		GCN #23203	GRB 180904A: Swift-BAT refined analysis

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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
27.5	274.2412	46.6242			NED
39.8	274.2558	46.6192			NED
42.7	274.2344	46.6349		B=21.7, R=20.0	APM-N
49.3	274.2696	46.6283		B1=20.4, B2=20.3	USNO-B1
49.7	274.2697	46.6282		B=20.5, R=19.4	APM-N
50.3	274.2700	46.6283		B1=20.7, B2=20.0, R1=19.9, R2=19.8	USNO-B1
54.4	274.2646	46.6406			NED
55.1	274.2287	46.6344			NED
60.1	274.2272	46.6232		B2=20.4, I=17.9, R1=19.1, R2=19.1	USNO-B1
60.2	274.2271	46.6231			NED

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

There are 104 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
6.0	274.2518	46.6286	B2=20.4, R2=20.5	USNO-B1
18.2	274.2490	46.6244	B1=20.6, B2=20.2, I=18.9, R1=19.3, R2=19.4	USNO-B1
26.8	274.2418	46.6243	B1=15.8, B2=15.5, I=14.3, R1=14.7, R2=14.7	USNO-B1
26.9	274.2418	46.6243	h=13.3, j=13.5, k=13.1	2MASS
30.5	274.2480	46.6378	B1=20.8, R1=19.9	USNO-B1
36.0	274.2456	46.6198	I=18.8, R2=20.4	USNO-B1
39.5	274.2558	46.6193	B1=20.4, B2=19.2, I=16.5, R1=17.5, R2=17.2	USNO-B1
39.8	274.2558	46.6192	h=14.8, j=15.4, k=14.7	2MASS
54.4	274.2645	46.6406	h=15.8, j=16.4, k=15.2	2MASS
54.7	274.2646	46.6406	B1=20.6, B2=19.8, I=17.6, R1=18.5, R2=18.0	USNO-B1

Queried USNO-B1, SDSS, 2MASS.

There are 151 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.