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Swift Trigger: 709351

Presumed name: GRB 160821A

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BAT 11h 24m 59.52s, +42° 20′ 34.8″
position:(171.248, +42.343 ± 180″)
XRT No position available.
UVOT No position available.
Galactic NHI:2.71×100 cm-2
Galactic E(B-V):0.020 mag
Best RA:11h 24m 59.52s= 171.248 d
Best Dec:+42° 20′ 34.8″= +42.343 d
Gal Lat:66.74
Gal Long:166.51
Sun angle:35.19°, -1.3 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′′171.2480042.34300GCN #19830GRB 160821A: Swift detection of a bright burstVizier logo
17.4′′171.2537542.34528GCN #19840GRB 160821A: Swift-BAT refined analysisVizier logo
207.7′′171.3000042.30000GCN #19836GRB 160821A: Fermi-LAT 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
140.1171.195442.3414TYC 3015-3-1B=12.93, H=10.799, J=11.107, K=10.721, V=12.77Query vizier around this object
151.9171.254542.3011TYC 3015-14-1B=12.95, H=10.761, J=11.067, K=10.69, V=12.11Query 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
10.6171.247542.3458Mag=24.9NEDQuery vizier around this object
10.6171.247642.3459R=22.3, g=25.2, i=24.5, u=24.7, z=22.5SDSSQuery vizier around this object
17.1171.244142.3468R=18.1, g=19.2, i=17.6, u=20.9, z=17.3SDSSQuery vizier around this object
17.1171.244242.3467Mag=19.3NEDQuery vizier around this object
17.2171.243942.3467B=19.7, R=17.2APM-NQuery vizier around this object
22.8171.239842.3412R=22.3, g=23.4, i=21.9, u=23.3, z=21.1SDSSQuery vizier around this object
22.9171.239642.3411Mag=20.4NEDQuery vizier around this object
25.8171.255842.3472Mag=23.6NEDQuery vizier around this object
25.8171.255942.3472R=21.9, g=23.5, i=20.4, u=24.8, z=19.8SDSSQuery vizier around this object
26.7171.240042.3385R=21.8, g=22.6, i=21.0, u=23.1, z=20.3SDSSQuery vizier around this object


There are 490 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
17.3171.244042.3468B1=18.6, B2=18.6, R1=18.0, R2=17.6USNO-B1Query vizier around this object
17.4171.244142.3469h=16.0, j=16.9, k=15.52MASSQuery vizier around this object
23.7171.241042.3471B2=21.3, I=18.9, R1=19.0USNO-B1Query vizier around this object
27.3171.256342.3386I=23.5, R=24.6, g=25.9, u=22.0, z=22.5SDSSQuery vizier around this object
27.5171.255242.3485B1=18.7, B2=18.9, I=18.1, R1=18.2, R2=17.9USNO-B1Query vizier around this object
28.8171.252242.3504B1=18.8, B2=21.6, R1=18.8, R2=20.4USNO-B1Query vizier around this object
30.8171.253242.3354I=19.8, R=21.3, g=22.8, u=25.8, z=19.0SDSSQuery vizier around this object
49.5171.229442.3427B2=20.6, I=18.2, R1=19.1, R2=19.0USNO-B1Query vizier around this object
54.6171.257542.3564h=16.3, j=16.9, k=15.72MASSQuery vizier around this object
54.9171.257642.3565B2=19.3, I=17.6, R1=19.5, R2=18.4USNO-B1Query vizier around this object

Queried USNO-B1, SDSS, 2MASS.

There are 162 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.