srclist overlap message for exposure 1 of trigger 1001130
uvot_overlap.pl vrs. 2010-12-20b fem started at 201022d01h24m06s306323usUT
The observation of trigger 1001130 started 2020-10-21T20:29:29.8
Examining file ./1001130_g130_uvot_sky_srclist.fits
The exposure ID is 625004969
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (12.5438,-55.8416) with a roll angle of 195.2
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 (12.5500,-55.8390) with a radius of 3.000 arc min
This is 0.258 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 28.27 sq. arc min or 1.00 of the BAT error circle
The XRT error circle is centered at (12.5289,-55.8655) with a radius of 0.028 arc min
This is 1.522 arc min from the center of the uvot region
The area of the XRT error circle is 0.003 sq. arc min
The UVOT/XRT overlap is 0.003 sq. arc min or 1.00 of the XRT error circle
srclist afterglow message for exposure 1 of trigger 1001130
find_uvot_ag.pl vrs. 2017-02-17 fem started at 201022d01h24m10s888409usUT
Observation start time is 2020-10-21T20:29:29.8
Examining file ./1001130_g130_uvot_catalog_srclist.fits
The exposure ID is 625004969
The exposure is 149.879 sec.
The bin size is 2 pixels
The filter is WHITE
There are 28 detected source(s) for 1001130_g130
Aspect correction adds -0.00121 degrees (-0.291 sec of time = -2.45 arc sec) to RA
Aspect correction adds 0.00061 degrees ( 2.21 arcsec) to Dec
Total aspect correction is 3.30 arcsec
Star catalogs centered at 12.5472 , -55.8366 with radius 5.89 arc min.
n_usno: 351 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 27 matched entries is 0.670" for 1001130_g130
Mean and std. dev of mag. difference (MAG_DELTA) are 1.511 and 0.446 for 1001130_g130
Found 3 entries without IDs and 2 entries that are acceptable afterglow candidates for 1001130_g130.
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.
Magnitude criteria will be applied later.
BAT distances are from RA=12.5500 (00:50:12.00) DEC=-55.8390 (-55:50:20.4)
XRT distances are from RA=12.5289 (00:50:06.93) DEC=-55.8655 (-55:51:55.8)
-----------------
Entry 0 in the list of sources is a candidate afterglow for 1001130_g130 with 5x5 stamp
ra=12.54324 (00:50:10.38) dec=-55.82776 (-55:49:40.0) +/- 1.1" mag=20.69+/-0.35
dist=138.9 REFID=28
*** The position of this source is inconsistent with the XRT position.
The position is 42.7 arc sec from the BAT position.
src: 0 distr. of nearby unmatched sources: 0 0 0 0 0
Found 1 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
12.5439 -55.8273 2.1 -1 USNO-B1 18.55 17.52 17.98 *
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 1001130_g130 with 5x5 stamp
ra=12.52855 (00:50:06.85) dec=-55.86576 (-55:51:56.7) +/- 1.1" mag=17.19+/-0.35
dist=1.1 REFID=7
src: 6 distr. of nearby unmatched sources: 0 0 0 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
12.5249 -55.8613 17.6 -1 USNO-B1 21.01 19.45 20.14
12.5248 -55.8617 16.6 -1 USNO-B1 99.99 19.72 99.99
##### This source remains a candidate #####
It has no entries 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=12.52855 (00:50:06.85) dec=-55.86576 (-55:51:56.7) +/- 1.1" mag=17.19+/-0.35 dist=1.1 REFID=7
There are no candidates inside BAT error circle, but outside XRT error circle.
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 19.22, 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 1 of trigger 1001130
------ Start for Possible Stand-alone Circular ----
In response to GRB201021 (Swift/BAT trigger 1001130) at 20:27:18 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 105 seconds after the BAT trigger. There is a candidate afterglow in
the list of sources generated on-board at
RA(J2000) = 00:50:06.85 = 12.52855
DEC(J2000) = -55:51:56.7 = -55.86576
with a 90%-confidence error radius of about 1.10 arc sec. This position is 1.1
arc sec. from the center of the XRT error circle. The estimated magnitude is
17.19. No correction has been made for the expected extinction corresponding to
E(B-V) of 0.02.
------- notes for trigger 1001130 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 201022d01h24m14s250600usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1001130
-expid=625004969 -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/1001130/
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 625004969.84362 or about 2020:295:20:29:24 UT
Found 347 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 6% of the srclist region. Found 28 sources in
srclist catalog. Found 3 srclist source(s) without IDs. There are 1 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
19.22 mag.
Found 6 source(s) in Genie image catalog. Found 0 Genie image source(s) without
IDs. There are 0 good candidate(s) in the Genie image catalog. Good candidates
must be brighter than 20.92 mag. Found 64 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 7% of the
Genie image region. The closest Genie source has ra= 12.5414 dec= -55.8638
mag=20.56 sep=25.94".
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?
625004969 104 WHITE 12.52855 -55.86576 17.19/19.2 1.1 srclist Yes
625004969 104 WHITE image found no candidates.
List afterglow candidates for other finding charts.
625005181 316 U 12.52899 -55.86604 16.62/18.1 0.9 srclist Yes
625005181 316 U image found no candidates.
625005738 873 WHITE 12.52865 -55.86571 18.39/18.5 2.1 srclist Yes
625005738 873 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: white
GRB_DEC: -55.86576
GRB_ERROR: 1.10
GRB_RA: 12.52855
IMAGE_START_TIME: 20:29:24
MAGNITUDE: 17.19
MAG_ERROR: 0.4
MESSAGE_TYPE: ACK
SOURCE: XRT