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Swift Trigger: 1014037

Presumed name: GRB 201221D

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

BAT	11h 24m 11.76s, +42° 08′ 38.4″
position:	(171.049, +42.144 ± 180″)
XRT	11h 24m 14.09s, +42° 08′ 37.7″
position:	(171.0587, 42.1438 ± 4.2″)
UVOT	No position available.
Galactic NHI:	2.49×100 cm-2
Galactic E(B-V):	0.020 mag

Best RA:	11h 24m 14.09s	= 171.0587 d
Best Dec:	+42° 08′ 37.7″	= 42.1438 d
Gal Lat:	66.73
Gal Long:	167.12
Sun angle:	112.09°, 6.6 hr West

¹Sper #2 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 - enhanced position.
  • RA (J2000) : 11 24 14.09 (42.1438)
  • Dec (J2000): +42 08 37.5 ( 42.14407)
  • Error (90%): 4.2
  • Counts in Source: 10

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′′	171.05870	42.14380		GCN #29113	GRB 201221D: Prompt enhanced Swift-XRT position
1.7′′	171.05875	42.14333		GCN #29112	GRB 201221D: Swift detection of a bright short burst
2.2′′	171.05838	42.14436		GCN #29133	GRB 201221D: Archival PS1 Imaging of the Putative Host Galaxy
2.4′′	171.05842	42.14444		GCN #29117	GRB 201221D: candidate optical counterpart from the NOT
2.5′′	171.05912	42.14319		GCN #29119	GRB 201221D: Enhanced Swift-XRT position
31.1′′	171.05500	42.15200		GCN #29139	GRB 201221D: Swift-BAT refined analysis

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
78.6	171.0356	42.1302	SDSS J112408.54+420748.7	g=18.753, i=17.998, r=18.357, u=19.552, z=17.929
80.7	171.0301	42.1510	SDSS J112407.21+420903.5	g=19.699, i=18.150, r=18.566, u=21.321, z=17.883
91.0	171.0258	42.1504	SDSS J112406.19+420901.5	g=18.530, i=17.637, r=17.962, u=20.010, z=17.606
184.4	171.1225	42.1635	SDSS J112429.39+420948.5	g=19.704, i=18.515, r=18.890, u=20.868, z=18.318

There are 4 SIMBAD objects within the position error. The full list is here.

* 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
22.3	171.0617	42.1497		Mag=21.6	NED
22.3	171.0616	42.1496		R=19.6, g=21.3, i=19.1, u=23.2, z=18.7	SDSS
22.5	171.0616	42.1496		B=22.1, R=19.2	APM-N
22.6	171.0531	42.1391		R=21.5, g=22.2, i=21.6, u=23.3, z=22.7	SDSS
22.6	171.0529	42.1392		Mag=22.4	NED
24.9	171.0499	42.1416		R=22.0, g=23.8, i=21.1, u=25.1, z=22.0	SDSS
24.9	171.0496	42.1417		Mag=22.0	NED
25.6	171.0625	42.1372		Mag=23.3	NED
27.2	171.0525	42.1500		Mag=23.3	NED
33.8	171.0478	42.1486		R=24.5, g=25.6, i=25.1, u=26.2, z=20.6	SDSS

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

There are 510 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
22.6	171.0616	42.1497	B2=21.0, I=18.7, R1=19.5, R2=19.1	USNO-B1
25.6	171.0626	42.1373	I=20.6, R=21.9, g=23.3, u=24.3, z=20.0	SDSS
37.3	171.0655	42.1347	I=22.9, R=22.4, g=23.5, u=25.4, z=22.9	SDSS
37.8	171.0713	42.1390	I=23.8, R=25.8, g=24.4, u=24.9, z=20.8	SDSS
43.7	171.0732	42.1381	I=21.5, R=21.5, g=21.7, u=23.3, z=22.4	SDSS
43.9	171.0629	42.1556	R1=19.9, R2=19.9	USNO-B1
44.1	171.0448	42.1372	I=21.6, R=22.7, g=25.1, u=25.4, z=20.6	SDSS
48.4	171.0551	42.1306	B1=21.8, B2=21.5, I=19.0, R1=19.7, R2=19.1	USNO-B1
49.7	171.0423	42.1503	I=22.6, R=23.5, g=24.5, u=23.9, z=20.7	SDSS
55.6	171.0764	42.1520	I=25.7, R=25.6, g=24.6, u=24.4, z=21.0	SDSS

Queried USNO-B1, SDSS, 2MASS.

There are 149 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.