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Swift Trigger: 609885

Presumed name: GRB 140818B

Back to trigger list.

BAT 18h 04m 35.52s, -01° 21′ 39.6″
position:(271.148, -1.361 ± 180″)
XRT 18h 04m 32.47s, -01° 23′ 12.5″
position:(271.1353, -1.3868 ± 2.2″)
UVOT No position available.
Galactic NHI:2.09×100 cm-2
Galactic E(B-V):0.865 mag
Best RA:18h 04m 32.47s= 271.1353 d
Best Dec:-01° 23′ 12.5″= -1.3868 d
Gal Lat:9.77
Gal Long:26.28
Sun angle:122.73°, -8.2 hr East of Sun

1Sper #7 auto processing.

GCN Notices for this burst.

View this region in Aladin.

Observability of this burst for Swift.

Sun angle for this burst.

UVOT data

UVOT u image

u image

UVOT white image

white image

UVOT white image

white image

Blink images with DSS (link via GSFC)


SPER results page for this trigger.

Image of the SPER data

There are 7 SPER messages, and 1 objects have been found

See the SPER page for details of how this position was produced.

Known transients within 5′ of the GRB

Click on the offset to view the transient announcement.

Offset (′′)RA DecDate reportedSource MiscQuery
2.1′′271.13556-1.38629GCN #16712GRB 140818B: Enhanced Swift-XRT positionVizier logo
2.1′′271.13554-1.38628GCN #16757GRB140818B� the review of the sky area in plate archivesVizier logo
2.7′′271.13529-1.38606GCN #16711GRB 140818B: OSN I-band afterglow candidateVizier logo
2.8′′271.13529-1.38603GCN #16718GRB 140818B : Correction to GCN 16713Vizier logo
4.5′′271.13654-1.38661GCN #16709GRB 140818B: Swift detection of a burstVizier logo
5.6′′271.13650-1.38581GCN #16780GRB 140818B: TShAO optical upper limitVizier logo
12.5′′271.13529-1.38333GCN #16713GRB140818B : GROND afterglow candidateVizier logo
165.5′′271.16750-1.35397GCN #16721GRB 140818B� Swift-BAT refined analysisVizier logo

There are 16 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).


RA*Dec*SIMBAD name Query
177.3271.1175-1.43272MASS J18042821-0125578B=17.400, H=7.266, J=8.378, K=6.784, R=14.100Query vizier around this object

* RA/Dec in equinox J2000

X-ray sources

RA*Dec* Source table2Observatory Query

Queried the X-ray MASTER catalogue.

* RA/Dec in equinox J2000

1Energy band for count-rate is mission specific.


RA*Dec*Redshift CatalogueQuery
12.1271.1387-1.3868R1=18.5, R2=18.4USNO-B1Query vizier around this object
13.1271.1342-1.3903B2=20.8, I=18.3, R1=19.1USNO-B1Query vizier around this object
13.4271.1342-1.3903B=20.7, R2=19.5, i=19.5SSSQuery vizier around this object
13.8271.1391-1.3873B1=19.3, B2=18.2, I=16.5, R1=16.9, R2=16.7USNO-B1Query vizier around this object
13.9271.1391-1.3874B=18.8, R2=17.6, i=17.0SSSQuery vizier around this object
14.2271.1386-1.3846B=20.7, R2=18.4, i=18.5SSSQuery vizier around this object
14.3271.1386-1.3846B2=20.3, I=17.7, R1=18.1, R2=18.1USNO-B1Query vizier around this object
16.5271.1333-1.3909I=18.4, R1=19.1, R2=18.6USNO-B1Query vizier around this object
16.7271.1333-1.3910B=20.9, R2=19.4, i=19.7SSSQuery vizier around this object
18.5271.1396-1.3841B2=20.4, I=17.7, R1=17.8USNO-B1Query vizier around this object


There are 469 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


RA*Dec* CatalogueQuery
8.8271.1340-1.3847B2=21.1, R2=19.0USNO-B1Query vizier around this object
13.8271.1391-1.3874h=15.2, j=15.7, k=15.12MASSQuery vizier around this object
13.9271.1386-1.3847h=15.9, j=16.6, k=15.32MASSQuery vizier around this object
19.8271.1373-1.3817h=16.0, j=16.7, k=16.22MASSQuery vizier around this object
21.2271.1310-1.3908h=15.4, j=15.9, k=15.02MASSQuery vizier around this object
21.3271.1412-1.3872h=15.9, j=14.5, k=13.42MASSQuery vizier around this object
21.5271.1407-1.3894h=15.1, j=15.6, k=15.02MASSQuery vizier around this object
21.7271.1408-1.3893B1=19.8, B2=18.7, I=16.8, R1=17.4, R2=17.1USNO-B1Query vizier around this object
22.6271.1375-1.3927B2=20.2, I=16.8, R1=18.0, R2=17.8USNO-B1Query vizier around this object
22.8271.1374-1.3928h=14.6, j=15.6, k=14.42MASSQuery vizier around this object

Queried USNO-B1, SDSS, 2MASS.

There are 487 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.