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Home > GRB region information > 921722

Swift Trigger: 921722

Presumed name: GRB 190821A

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

BAT	16h 40m 18.48s, -34° 01′ 19.2″
position:	(250.077, -34.022 ± 180″)
XRT	16h 40m 13.11s, -34° 00′ 25.9″
position:	(250.05464, -34.00719 ± 3.6″)
UVOT	No position available.
Galactic NHI:	1.95×100 cm-2
Galactic E(B-V):	0.563 mag

Best RA:	16h 40m 13.11s	= 250.05464 d
Best Dec:	-34° 00′ 25.9″	= -34.00719 d
Gal Lat:	8.32
Gal Long:	347.69
Sun angle:	104.82°, -6.7 hr East of Sun

¹Sper #4 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 4 SPER messages, and 1 objects have been found

• • Object 1
  • RA (J2000) : 16 40 13.11 ( 250.05464)
  • Dec (J2000): -34 00 25.9 ( -34.00719)
  • Error (90%): 3.577"
  • Counts in Source: 182

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
0.0′′	250.05464	-34.00719		GCN #25427	GRB 190821A: Swift detection of a burst
0.5′′	250.05479	-34.00711		GCN #25436	GRB 190821A: Enhanced Swift-XRT position
84.0′′	250.07042	-34.02653		GCN #25464	GRB 190821A: Swift-BAT refined analysis
85.4′′	250.07700	-34.02200		GCN #25429	Swift GRB190821.72 Global MASTER-Net observations report
203.5′′	250.07504	-33.95324		GCN #25428	Fermi trigger No 588100239 Global MASTER-Net observations report

There are 12 matches in total. See the full table for details.

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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

* 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
2.5	250.0550	-34.0078			NED
6.7	250.0531	-34.0085		B=21.1	SSS
7.8	250.0526	-34.0058		B2=18.0, R2=17.3	USNO-B1
8.0	250.0521	-34.0072			NED
8.3	250.0525	-34.0058			NED
8.7	250.0571	-34.0061			NED
13.6	250.0509	-34.0050		B=21.3, R2=20.1	SSS
13.8	250.0573	-34.0040		B=21.3	SSS
16.2	250.0494	-34.0062		B=21.1, i=19.7	SSS
16.4	250.0601	-34.0068		I=17.3, R2=20.7	USNO-B1

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

There are 987 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
1.5	250.0548	-34.0076	I=16.2, R2=17.8	USNO-B1
2.0	250.0550	-34.0077	I=16.4, R1=17.9, R2=17.8	USNO-B1
2.5	250.0551	-34.0078	h=14.7, j=15.4, k=14.5	2MASS
6.2	250.0527	-34.0067	I=16.5, R2=16.9	USNO-B1
7.0	250.0523	-34.0069	B2=17.3, I=15.8, R1=15.7, R2=15.7	USNO-B1
8.0	250.0520	-34.0073	h=14.6, j=15.1, k=14.5	2MASS
8.3	250.0525	-34.0057	h=15.9, j=16.4, k=15.5	2MASS
8.7	250.0573	-34.0061	h=15.8, j=16.8, k=15.2	2MASS
9.0	250.0574	-34.0061	B2=17.9, I=16.3, R1=18.0, R2=17.6	USNO-B1
11.0	250.0543	-34.0041	R1=18.7, R2=18.2	USNO-B1

Queried USNO-B1, SDSS, 2MASS.

There are 961 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.