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Swift Trigger: 373458

Presumed name: GRB 091020

Back to trigger list.

BAT 11h 42m 51.60s, +50° 58′ 19.2″
position:(175.715, +50.972 ± 180″)
XRT 11h 42m 55.20s, +50° 58′ 41.9″
position:(175.7300, 50.9783 ± 2.1″)
UVOT No position available.
Galactic NHI:0.00×100 cm-2
Galactic E(B-V):0.017 mag
Best RA:11h 42m 55.20s= 175.7300 d
Best Dec:+50° 58′ 41.9″= 50.9783 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

UVOT unknown image

unknown image

UVOT unknown image

unknown image

UVOT unknown image

unknown image

Blink images with DSS (link via GSFC)


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 DecDate reportedSource MiscQuery
0.1′′175.7300050.97833GCN #10054GRB091020 Swift/UVOT observationsVizier logo
0.2′′175.7299250.97831GCN #10048GRB 091020: Swift detection of a burst with an optical afterglowVizier logo
0.3′′175.7300450.97839GCN #10050GRB 091020: Enhanced Swift-XRT positionVizier logo
0.8′′175.7302850.97816GCN #10088Radio afterglow detection from GRB 091020Vizier logo
8.3′′175.7270050.97700GCN #10051GRB 091020� Swift-BAT refined analysisVizier logo
142.3′′175.7050051.01456GCN #10076GRB 091020: Early TLS Multicolor detections� red afterglowVizier logo

There are 13 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
0.1175.730050.9783GRB 091020Query vizier around this object
172.6175.659050.96102MASS J11423814+5057396B=19.8, H=13.48, I=15.5, J=14.08, K=13.26, R=18.0Query 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
0.2175.730050.9783NEDQuery vizier around this object
11.2175.733750.9761Mag=20.9NEDQuery vizier around this object
11.3175.725650.9797B2=18.7, I=19.3USNO-B1Query vizier around this object
18.2175.737950.9783Mag=21.9NEDQuery vizier around this object
18.3175.738150.9782R=20.6, g=21.8, i=20.1, u=22.3, z=19.9SDSSQuery vizier around this object
23.8175.723750.9728Mag=23.1NEDQuery vizier around this object
27.3175.732650.9709R=24.5, g=24.2, i=21.7, u=25.8, z=22.9SDSSQuery vizier around this object
29.0175.720850.9842Mag=23.3NEDQuery vizier around this object
31.5175.716350.9772Mag=23.9NEDQuery vizier around this object
31.5175.716250.9773R=21.7, g=24.6, i=20.7, u=24.6, z=20.0SDSSQuery vizier around this object


There are 426 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
7.8175.731850.9801I=21.3, R=23.2, g=25.6, u=25.8, z=20.4SDSSQuery vizier around this object
10.5175.733450.9763B1=20.6, B2=21.0, R1=20.2, R2=19.9USNO-B1Query vizier around this object
11.2175.733650.9762I=20.5, R=20.6, g=20.9, u=21.5, z=20.3SDSSQuery vizier around this object
18.0175.737950.9783B2=20.4, R2=20.0USNO-B1Query vizier around this object
23.8175.724050.9729I=21.8, R=22.1, g=23.1, u=23.2, z=21.3SDSSQuery vizier around this object
24.4175.719450.9797I=22.4, R=24.8, g=26.2, u=25.8, z=23.1SDSSQuery vizier around this object
28.3175.729850.9862I=22.1, R=24.0, g=25.7, u=24.9, z=23.6SDSSQuery vizier around this object
29.0175.721150.9841I=21.9, R=22.8, g=23.4, u=25.1, z=21.8SDSSQuery vizier around this object
30.1175.742850.9805I=18.3, R1=19.8USNO-B1Query vizier around this object
35.7175.741050.9712B2=21.0, I=19.2, R1=19.7USNO-B1Query vizier around this object

Queried USNO-B1, SDSS, 2MASS.

There are 166 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.