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Swift Trigger: 769177

Presumed name: GRB 170823A

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BAT 12h 34m 52.56s, +35° 34′ 55.2″
position:(188.719, 35.582 ± 180″)
XRT No position available.
UVOT No position available.
Galactic NHI:1.23×100 cm-2
Galactic E(B-V):0.012 mag
Best RA:12h 34m 52.56s= 188.719 d
Best Dec:+35° 34′ 55.2″= 35.582 d
Gal Lat:80.84
Gal Long:144.57
Sun angle:40.62°, -2.4 hr East of Sun

GCN Notices for this burst.

View this region in Aladin.

Observability of this burst for Swift.

Sun angle for this burst.

UVOT data

No UVOT images are currently available.


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
0.0′′188.7190035.58200GCN #21666GRB 170823A: Swift detection of a burstVizier logo
118.5′′188.7129235.54944GCN #21678GRB 170823A: Swift-BAT refined analysisVizier logo

Catalogue Searches. Searched 3.33′ around BAT 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
58.6188.714335.566287GB 123224.0+355039B=21.10, V=20.79, g=20.548, i=20.095, r=20.463, u=21.286, z=20.057Query vizier around this object
83.0188.707335.5610SDSS J123449.74+353339.6g=21.8, i=18.95, r=19.94, u=23.6, z=18.60Query vizier around this object
90.2188.712535.5575[OCL83] 1232+358Query vizier around this object
127.2188.677235.5724[SPD2011] 17994Query vizier around this object
129.9188.688135.5561SDSS J123445.14+353322.1g=21.01, i=20.39, r=20.42, u=21.4, z=20.1Query vizier around this object
149.3188.669435.5723SDSS J123440.66+353420.3g=22.3, i=19.64, r=20.59, u=24.3, z=19.09Query vizier around this object
187.7188.774835.5564NGP9 F268-0939754Query vizier around this object

There are 7 SIMBAD objects within the position error. The full list is here.

* 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
10.1188.715935.5807R=22.1, g=23.7, i=22.0, u=22.7, z=21.1SDSSQuery vizier around this object
10.1188.715835.5808Mag=23.7NEDQuery vizier around this object
12.1188.720835.5790h=0.0, j=0.0, k=22.82MASSQuery vizier around this object
16.3188.722835.5853R=20.9, g=21.9, i=20.3, u=22.1, z=20.2SDSSQuery vizier around this object
17.2188.718435.5773h=23.1, j=25.4, k=21.82MASSQuery vizier around this object
17.3188.718435.5772h=24.1, j=23.3, k=22.02MASSQuery vizier around this object
17.3188.718335.5772Mag=24.1NEDQuery vizier around this object
24.7188.716335.5886Mag=21.9NEDQuery vizier around this object
24.7188.716335.5885R=21.6, g=21.9, i=21.2, u=22.8, z=20.5SDSSQuery vizier around this object
26.4188.726435.5778R=20.9, g=22.3, i=20.1, u=26.6, z=19.8SDSSQuery vizier around this object


There are 653 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
12.1188.720835.5790R=22.8SDSSQuery vizier around this object
17.2188.718435.5773I=20.4, R=21.8, g=23.1, u=25.4, z=19.5SDSSQuery vizier around this object
17.3188.718435.5772I=20.7, R=22.0, g=24.1, u=23.3, z=19.9SDSSQuery vizier around this object
34.1188.728135.5879I=18.4, R=19.4, g=20.9, u=23.7, z=17.8SDSSQuery vizier around this object
34.3188.728035.5881h=16.1, j=16.6, k=15.52MASSQuery vizier around this object
34.7188.726035.5742I=21.7, R=21.5, g=21.9, u=21.8, z=21.4SDSSQuery vizier around this object
37.8188.731935.5826I=19.0, R1=19.5, R2=20.5USNO-B1Query vizier around this object
38.3188.731935.5838I=20.9, R=21.8, g=23.3, u=23.6, z=20.4SDSSQuery vizier around this object
39.0188.727635.5738B1=20.7, B2=20.9, R2=20.7USNO-B1Query vizier around this object
40.6188.732835.5813B2=21.5, I=18.9, R1=19.3, R2=19.8USNO-B1Query vizier around this object

Queried USNO-B1, SDSS, 2MASS.

There are 153 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.