srclist overlap message for exposure 2 of trigger 1015873
uvot_overlap.pl vrs. 2010-12-20b fem started at 210104d21h55m26s640013usUT
The observation of trigger 1015873 started 2021-01-04T11:32:08.2
Examining file ./1015873_g308_uvot_sky_srclist.fits
The exposure ID is 631452728
The exposure time is undefined.
The filter is U.
The uvot region is centered at (103.7659,64.6780) with a roll angle of 357.4
It is square with sides of 8.03 arc min. for an area of 64.51 sq arc min
The BAT error circle is centered at (103.7050,64.6610) with a radius of 3.000 arc min
This is 1.866 arc min from the center of the uvot region
The area of the BAT error circle is 28.27 sq. arc min
The UVOT/BAT overlap is 26.85 sq. arc min or 0.95 of the BAT error circle
The XRT error circle is centered at (103.7728,64.6761) with a radius of 0.023 arc min
This is 0.210 arc min from the center of the uvot region
The area of the XRT error circle is 0.002 sq. arc min
The UVOT/XRT overlap is 0.002 sq. arc min or 1.00 of the XRT error circle
srclist afterglow message for exposure 2 of trigger 1015873
find_uvot_ag.pl vrs. 2020-10-30 fem started at 210104d21h55m40s725530usUT
Observation start time is 2021-01-04T11:32:08.2
Examining file ./1015873_g308_uvot_catalog_srclist.fits
The exposure ID is 631452728
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is U
There are 70 detected source(s) for 1015873_g308
Aspect correction adds 0.00157 degrees (0.377 sec of time = 2.42 arc sec) to RA
Aspect correction adds 0.00052 degrees ( 1.86 arcsec) to Dec
Total aspect correction is 3.05 arcsec
Star catalogs centered at 103.7778 , 64.6778 with radius 6.29 arc min.
n_usno: 475 n_gsc: 0
*** WARNING -- bright star catalog has 4 entries brighter than 12 mag
The brightest has mag 10.95886
RA DEC Mag Color
bright star 0: 103.82948 (06:55:19.08) 64.71798 (+64:43:04.7) 11.42 USNO-V
bright star 1: 103.80077 (06:55:12.18) 64.62007 (+64:37:12.3) 10.96 USNO-V
bright star 2: 103.82969 (06:55:19.13) 64.73356 (+64:44:00.8) 11.44 USNO-V
bright star 3: 103.61437 (06:54:27.45) 64.65760 (+64:39:27.4) 11.99 USNO-V
Mean distance difference (CAT_DELTA) for 34 matched entries is 0.806" for 1015873_g308
Mean and std. dev of mag. difference (MAG_DELTA) are 1.704 and 1.207 for 1015873_g308
Found 37 entries without IDs and 12 entries that are acceptable afterglow candidates for 1015873_g308.
Acceptable entries have no ID, XRT distances < 5", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
20 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=103.7050 (06:54:49.20) DEC=64.6610 (+64:39:39.6)
XRT distances are from RA=103.7728 (06:55:05.47) DEC=64.6761 (+64:40:33.8)
*** WARNING 52 per cent of entries have no IDs.
-----------------
Entry 0 in the list of sources is a candidate afterglow for 1015873_g308 with 5x5 stamp
ra=103.77182 (06:55:05.24) dec=64.67635 (+64:40:34.9) +/- 1.1" mag=16.13+/-0.35
dist=1.8 REFID=10
src: 0 distr. of nearby unmatched sources: 0 0 0 1 2
Found 2 entries in star catalog(s) within 20.0" of the candidate.
printing all entries
(Entries within 2 arc sec of a source list entry are considered a match)
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
103.7846 64.6768 19.8 -1 USNO-B1 16.30 15.20 15.69
103.7782 64.6724 17.3 -1 USNO-B1 20.94 99.99 99.99
##### This source remains a candidate #####
It has no entries within 4" or brighter than 13 mag
-----------------
Entry 2 in the list of sources is a candidate afterglow for 1015873_g308 with 5x5 stamp
ra=103.77965 (06:55:07.12) dec=64.68070 (+64:40:50.5) +/- 1.1" mag=16.08+/-0.35
dist=19.8 REFID=21
*** The position of this source is inconsistent with the XRT position.
The position is 135.1 arc sec from the BAT position.
src: 2 distr. of nearby unmatched sources: 0 2 1 1 0
Found 3 entries in star catalog(s) within 20.0" of the candidate.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
103.7846 64.6768 15.9 -1 USNO-B1 16.30 15.20 15.69
103.7810 64.6812 2.8 -1 USNO-B1 12.73 12.03 12.34 *
103.7753 64.6823 8.9 -1 USNO-B1 20.90 19.50 20.12
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 4 in the list of sources is a candidate afterglow for 1015873_g308 with 3x3 stamp
ra=103.78404 (06:55:08.17) dec=64.68014 (+64:40:48.5) +/- 1.1" mag=19.01+/-0.35
dist=22.7 REFID=56
*** The position of this source is inconsistent with the XRT position.
The position is 139.9 arc sec from the BAT position.
src: 4 distr. of nearby unmatched sources: 1 1 1 0 1
Found 3 entries in star catalog(s) within 20.0" of the candidate.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
103.7846 64.6768 11.9 -1 USNO-B1 16.30 15.20 15.69
103.7810 64.6812 6.1 -1 USNO-B1 12.73 12.03 12.34 *
103.7753 64.6823 15.6 -1 USNO-B1 20.90 19.50 20.12
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 6 in the list of sources is a candidate afterglow for 1015873_g308 with 3x3 stamp
ra=103.78459 (06:55:08.30) dec=64.68062 (+64:40:50.2) +/- 1.1" mag=18.87+/-0.35
dist=24.5 REFID=50
*** The position of this source is inconsistent with the XRT position.
The position is 141.5 arc sec from the BAT position.
src: 6 distr. of nearby unmatched sources: 1 1 1 0 1
Found 3 entries in star catalog(s) within 20.0" of the candidate.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
103.7846 64.6768 13.7 -1 USNO-B1 16.30 15.20 15.69
103.7810 64.6812 6.0 -1 USNO-B1 12.73 12.03 12.34 *
103.7753 64.6823 15.6 -1 USNO-B1 20.90 19.50 20.12
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 7 in the list of sources is a candidate afterglow for 1015873_g308 with 3x3 stamp
ra=103.78493 (06:55:08.38) dec=64.68391 (+64:41:02.1) +/- 1.1" mag=19.43+/-0.35
dist=33.9 REFID=66
*** The position of this source is inconsistent with the XRT position.
The position is 148.2 arc sec from the BAT position.
src: 7 distr. of nearby unmatched sources: 0 0 3 0 0
Found 2 entries in star catalog(s) within 20.0" of the candidate.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
103.7810 64.6812 11.4 -1 USNO-B1 12.73 12.03 12.34 *
103.7753 64.6823 15.9 -1 USNO-B1 20.90 19.50 20.12
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 11 in the list of sources is a candidate afterglow for 1015873_g308 with 3x3 stamp
ra=103.70435 (06:54:49.04) dec=64.68473 (+64:41:05.0) +/- 1.1" mag=19.43+/-0.35
dist=109.9 REFID=67
*** The position of this source is inconsistent with the XRT position.
The position is 85.4 arc sec from the BAT position.
src: 11 distr. of nearby unmatched sources: 0 0 0 0 0
Found 0 entries in star catalog(s) within 20.0" of the candidate.
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 18 in the list of sources is a candidate afterglow for 1015873_g308 with 3x3 stamp
ra=103.75484 (06:55:01.16) dec=64.62833 (+64:37:42.0) +/- 1.1" mag=19.06+/-0.35
dist=174.1 REFID=47
*** The position of this source is inconsistent with the XRT position.
The position is 140.5 arc sec from the BAT position.
src: 18 distr. of nearby unmatched sources: 2 1 0 0 0
Found 5 entries in star catalog(s) within 20.0" of the candidate.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
103.7521 64.6314 12.0 -1 USNO-B1 20.61 19.68 20.09
103.7597 64.6302 10.2 -1 USNO-B1 20.75 19.29 19.94
103.7520 64.6284 4.4 -1 USNO-B1 12.78 11.87 12.27 *
103.7525 64.6258 9.7 -1 USNO-B1 21.07 18.51 19.65
103.7517 64.6258 10.3 -1 USNO-B1 20.80 19.29 19.96
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 22 in the list of sources is a candidate afterglow for 1015873_g308 with 3x3 stamp
ra=103.75412 (06:55:00.99) dec=64.62769 (+64:37:39.7) +/- 1.1" mag=18.67+/-0.35
dist=176.5 REFID=42
*** The position of this source is inconsistent with the XRT position.
The position is 141.8 arc sec from the BAT position.
src: 22 distr. of nearby unmatched sources: 3 0 0 0 0
Found 5 entries in star catalog(s) within 20.0" of the candidate.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
103.7521 64.6314 13.8 -1 USNO-B1 20.61 19.68 20.09
103.7597 64.6302 12.6 -1 USNO-B1 20.75 19.29 19.94
103.7520 64.6284 4.1 -1 USNO-B1 12.78 11.87 12.27 *
103.7525 64.6258 7.2 -1 USNO-B1 21.07 18.51 19.65
103.7517 64.6258 7.8 -1 USNO-B1 20.80 19.29 19.96
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 24 in the list of sources is a candidate afterglow for 1015873_g308 with 3x3 stamp
ra=103.75483 (06:55:01.16) dec=64.62711 (+64:37:37.6) +/- 1.1" mag=18.92+/-0.35
dist=178.4 REFID=43
*** The position of this source is inconsistent with the XRT position.
The position is 144.2 arc sec from the BAT position.
src: 24 distr. of nearby unmatched sources: 3 0 0 0 0
Found 5 entries in star catalog(s) within 20.0" of the candidate.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
103.7521 64.6314 16.2 -1 USNO-B1 20.61 19.68 20.09
103.7597 64.6302 13.5 -1 USNO-B1 20.75 19.29 19.94
103.7520 64.6284 6.4 -1 USNO-B1 12.78 11.87 12.27 *
103.7525 64.6258 5.8 -1 USNO-B1 21.07 18.51 19.65
103.7517 64.6258 6.8 -1 USNO-B1 20.80 19.29 19.96
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 25 in the list of sources is a candidate afterglow for 1015873_g308 with 3x3 stamp
ra=103.75201 (06:55:00.48) dec=64.62677 (+64:37:36.4) +/- 1.1" mag=19.29+/-0.35
dist=180.3 REFID=64
*** The position of this source is inconsistent with the XRT position.
The position is 142.9 arc sec from the BAT position.
src: 25 distr. of nearby unmatched sources: 2 1 0 0 0
Found 5 entries in star catalog(s) within 20.0" of the candidate.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
103.7521 64.6314 16.8 -1 USNO-B1 20.61 19.68 20.09
103.7597 64.6302 17.2 -1 USNO-B1 20.75 19.29 19.94
103.7520 64.6284 5.9 -1 USNO-B1 12.78 11.87 12.27 *
103.7525 64.6258 3.5 -1 USNO-B1 21.07 18.51 19.65 *
103.7517 64.6258 3.6 -1 USNO-B1 20.80 19.29 19.96 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 42 in the list of sources is a candidate afterglow for 1015873_g308 with 3x3 stamp
ra=103.64318 (06:54:34.36) dec=64.68719 (+64:41:13.9) +/- 1.1" mag=19.87+/-0.35
dist=203.5 REFID=70
*** The position of this source is inconsistent with the XRT position.
The position is 134.0 arc sec from the BAT position.
src: 42 distr. of nearby unmatched sources: 0 0 0 0 0
Found 0 entries in star catalog(s) within 20.0" of the candidate.
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 53 in the list of sources is a candidate afterglow for 1015873_g308 with 3x3 stamp
ra=103.63345 (06:54:32.03) dec=64.64490 (+64:38:41.6) +/- 1.1" mag=19.17+/-0.35
dist=242.3 REFID=57
*** The position of this source is inconsistent with the XRT position.
The position is 124.6 arc sec from the BAT position.
src: 53 distr. of nearby unmatched sources: 0 0 0 0 0
Found 1 entries in star catalog(s) within 20.0" of the candidate.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
103.6321 64.6452 2.3 -1 USNO-B1 16.82 15.91 16.32 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
Unmatched source ra=103.77182 (06:55:05.24) dec=64.67635 (+64:40:34.9) +/- 1.1" mag=16.13+/-0.35 dist=1.8 REFID=10
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 18.12, XRT distances < 5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 1 good candidate(s) found.
srclist paragraph message for exposure 2 of trigger 1015873
------ Start for Possible Stand-alone Circular ----
In response to GRB210104 (Swift/BAT trigger 1015873) at 11:26:59 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
282 seconds after the BAT trigger. There is a candidate afterglow in the
rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 06:55:05.26 = 103.77190
DEC(J2000) = +64:40:34.4 = 64.67621
with a 90%-confidence error radius of about 0.75 arc sec. This position is 1.5
arc sec. from the center of the XRT error circle. The estimated magnitude is
15.19 with a 1-sigma error of about 0.14. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.04.
------- notes for trigger 1015873 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 210104d21h55m44s309848usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1015873
-expid=631452728 -meonly -msg_srclist
Results from standard processing of UVOT TDRSS data for this trigger should be
available at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/1015873/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
XRT position found for srclist. XRT position found for Genie image. BAT
position found.
UVOT exposure began at MET 631452728.20566 or about 2021:004:11:32:03 UT
Found 471 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 8% of the srclist region. Found 70 sources in
srclist catalog. Found 37 srclist source(s) without IDs. There are 1 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
18.12 mag.
Found 7 source(s) in Genie image catalog. 1 source(s) are within 10.0" of the
xrt position. Found 1 Genie image source(s) without IDs. There are 1 good
candidate(s) in the Genie image catalog. Good candidates must be brighter than
20.46 mag. Found 85 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 8% of the Genie image region.
All AG candidates sorted by magnitude for the current finding chart.
(U/V/White SRCLIST mags < 17.5/17.5/18.5 are reliable. Mag > 18.5/18.5/19.5 are
not. Others are uncertain.)
(U/V/White Genie image mags < 18.0/18.0/19.0 are reliable. Mag > 19.0/19.0/20.0
are not. Others are uncertain.)
(Magnitudes followed by * have been corrected for exposure.)
---MET--- -dt- filter ---RA-- ---DEC--- -MAG/Limit Dist(") Source Asp.Corr?
631452728 282 U 103.77182 64.67635 16.13/18.1 1.8 srclist Yes
631452728 282 U 103.77190 64.67621 15.19/20.5 1.5 image Yes
List afterglow candidates for other finding charts.
631452516 70 WHITE 103.77188 64.67611 15.52/19.2 1.4 srclist Yes
631452516 70 WHITE 103.77189 64.67627 14.60/20.7 1.6 image Yes
631453306 860 WHITE 103.77146 64.67600 17.82/19.2 6.2 srclist Yes
631453306 860 WHITE 103.77190 64.67629 16.47/20.8 7.4 image Yes
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: 64.67621
GRB_ERROR: 0.75
GRB_RA: 103.77190
IMAGE_START_TIME: 11:32:03
MAGNITUDE: 15.19
MAG_ERROR: 0.14
MESSAGE_TYPE: ACK
SOURCE: XRT