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Home > GRB region information > 853824

Swift Trigger: 853824

Presumed name: GRB 180818A

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

BAT	11h 18m 26.64s, -48° 20′ 38.4″
position:	(169.611, -48.344 ± 180″)
XRT	11h 18m 32.71s, -48° 20′ 39.8″
position:	(169.6363, -48.3444 ± 2.3″)
UVOT	No position available.
Galactic NHI:	7.78×100 cm-2
Galactic E(B-V):	0.129 mag

Best RA:	11h 18m 32.71s	= 169.6363 d
Best Dec:	-48° 20′ 39.8″	= -48.3444 d
Gal Lat:	11.71
Gal Long:	287.41
Sun angle:	64.71°, -1.5 hr East of Sun

¹Sper #6 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 10 SPER messages, and 1 objects have been found

• • Object 1 - enhanced position.
  • RA (J2000) : 11 18 32.69 (-48.3443)
  • Dec (J2000): -48 20 39.5 ( -48.34526)
  • Error (90%): 2.2
  • Counts in Source: 82

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
0.2′′	169.63637	-48.34436		GCN #23146	GRB 180818A: Swift detection of a burst
1.2′′	169.63679	-48.34440		GCN #23147	GRB 180818A: Enhanced Swift-XRT position

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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
64.9	169.6139	-48.3545	2MASX J11182730-4821156	B=16.59, G=17.3940, H=11.846, J=12.629, K=11.720, R=15.10
119.0	169.6451	-48.3769	TYC 8217-907-1	B=12.92, G=12.3853, H=11.4, J=11.594, K=11.324, V=12.70
130.8	169.5864	-48.3592	TYC 8217-1249-1	B=12.64, G=12.0857, H=10.89, J=11.157, K=10.803, V=12.25

There are 3 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*	Redshift		Catalogue	Query
10.6	169.6392	-48.3464			NED
11.7	169.6396	-48.3468		B2=17.9, I=15.4, R1=19.8, R2=16.0	USNO-B1
18.8	169.6289	-48.3425		B=20.2, R2=19.2, i=18.9	SSS
19.0	169.6289	-48.3425		B2=20.3, I=18.9, R1=19.0, R2=19.3	USNO-B1
23.5	169.6355	-48.3379		B2=21.7, R2=20.4	USNO-B1
23.6	169.6354	-48.3379		B=21.5	SSS
24.7	169.6438	-48.3397			NED
30.1	169.6383	-48.3361			NED
33.9	169.6371	-48.3539			NED
35.5	169.6460	-48.3518		B2=21.6, I=19.1, R1=19.7, R2=19.9	USNO-B1

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

There are 344 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
10.6	169.6393	-48.3465	h=14.4, j=14.9, k=14.3	2MASS
10.9	169.6395	-48.3466	I=15.5, R1=15.9, R2=16.0	USNO-B1
14.2	169.6402	-48.3474	B2=19.9, R1=20.7	USNO-B1
16.2	169.6400	-48.3482	B2=20.0, R1=20.0	USNO-B1
20.1	169.6446	-48.3437	B2=19.2, I=18.1, R1=18.4, R2=18.8	USNO-B1
24.7	169.6439	-48.3398	h=14.5, j=15.2, k=14.3	2MASS
25.0	169.6441	-48.3398	B2=19.5, I=16.1, R1=16.9, R2=17.2	USNO-B1
30.0	169.6384	-48.3362	h=15.1, j=15.7, k=14.8	2MASS
30.1	169.6385	-48.3362	B2=18.7, I=16.4, R1=16.8, R2=16.9	USNO-B1
32.4	169.6382	-48.3355	I=17.5, R2=17.0	USNO-B1

Queried USNO-B1, SDSS, 2MASS.

There are 535 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.