srclist overlap message for exposure 2 of trigger 1001514
uvot_overlap.pl vrs. 2010-12-20b fem started at 201024d11h15m32s755184usUT
The observation of trigger 1001514 started 2020-10-24T03:04:01.0
Examining file ./1001514_g901_uvot_sky_srclist.fits
The exposure ID is 625201441
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (125.9524,3.3769) with a roll angle of 102.3
It is square with sides of 12.05 arc min. for an area of 145.15 sq arc min
The BAT error circle is centered at (125.9480,3.3770) with a radius of 3.000 arc min
This is 0.264 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 (125.9523,3.3544) with a radius of 0.045 arc min
This is 1.345 arc min from the center of the uvot region
The area of the XRT error circle is 0.006 sq. arc min
The UVOT/XRT overlap is 0.006 sq. arc min or 1.00 of the XRT error circle
srclist afterglow message for exposure 2 of trigger 1001514
find_uvot_ag.pl vrs. 2017-02-17 fem started at 201024d11h15m44s940159usUT
Observation start time is 2020-10-24T03:04:01.0
Examining file ./1001514_g901_uvot_catalog_srclist.fits
The exposure ID is 625201441
The exposure is 149.813 sec.
The bin size is 2 pixels
The filter is WHITE
There are 161 detected source(s) for 1001514_g901
Aspect correction adds 0.00156 degrees (0.374 sec of time = 5.60 arc sec) to RA
Aspect correction adds -0.00059 degrees (-2.14 arcsec) to Dec
Total aspect correction is 5.99 arcsec
Star catalogs centered at 125.9525 , 3.3767 with radius 8.98 arc min.
n_usno: 922 n_gsc: 0
*** WARNING -- bright star catalog has 6 entries brighter than 12 mag
The brightest has mag 9.37986
RA DEC Mag Color
bright star 0: 125.97849 (08:23:54.84) 3.44572 (+03:26:44.6) 11.48 USNO-V
bright star 1: 125.90712 (08:23:37.71) 3.44418 (+03:26:39.1) 11.45 USNO-V
bright star 2: 125.95411 (08:23:48.99) 3.46846 (+03:28:06.4) 10.64 USNO-V
bright star 3: 125.85124 (08:23:24.30) 3.36446 (+03:21:52.0) 11.22 USNO-V
bright star 4: 125.84914 (08:23:23.79) 3.31042 (+03:18:37.5) 10.48 USNO-V
bright star 5: 125.92942 (08:23:43.06) 3.22952 (+03:13:46.3) 9.38 USNO-V
Mean distance difference (CAT_DELTA) for 115 matched entries is 0.750" for 1001514_g901
Mean and std. dev of mag. difference (MAG_DELTA) are 1.864 and 0.716 for 1001514_g901
Found 48 entries without IDs and 2 entries that are acceptable afterglow candidates for 1001514_g901.
Acceptable entries have no ID, XRT distances < 6.75", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
41 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=125.9480 (08:23:47.52) DEC= 3.3770 (+03:22:37.2)
XRT distances are from RA=125.9523 (08:23:48.54) DEC= 3.3544 (+03:21:16.0)
*** WARNING 29 per cent of entries have no IDs.
-----------------
Entry 0 in the list of sources is a candidate afterglow for 1001514_g901 with 3x3 stamp
ra=125.95235 (08:23:48.56) dec=3.35407 (+03:21:14.7) +/- 1.1" mag=19.03+/-0.35
dist=1.4 REFID=94
src: 0 distr. of nearby unmatched sources: 0 0 0 0 0
Found 0 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)
##### This source remains a candidate #####
It has no entries within 4" or brighter than 13 mag
-----------------
Entry 26 in the list of sources is a candidate afterglow for 1001514_g901 with 1x1 stamp
ra=125.96640 (08:23:51.93) dec=3.41182 (+03:24:42.5) +/- 1.1" mag=19.09+/-0.35
dist=212.7 REFID=159
*** The position of this source is inconsistent with the XRT position.
The position is 141.7 arc sec from the BAT position.
src: 26 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
125.9670 3.4127 3.9 -1 USNO-B1 15.16 14.34 14.70 *
125.9657 3.4172 19.5 -1 USNO-B1 18.14 16.84 17.42
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=125.95235 (08:23:48.56) dec=3.35407 (+03:21:14.7) +/- 1.1" mag=19.03+/-0.35 dist=1.4 REFID=94
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 < 6.75",
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 1001514
------ Start for Possible Stand-alone Circular ----
In response to GRB201024 (Swift/BAT trigger 1001514) at 02:48:59 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 876 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 08:23:48.54 = 125.95223
DEC(J2000) = +03:21:14.5 = 3.35403
with a 90%-confidence error radius of about 0.63 arc sec. This position is 1.5
arc sec. from the center of the XRT error circle. The estimated magnitude is
18.38 with a 1-sigma error of about 0.15. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.03.
------- notes for trigger 1001514 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 201024d11h15m48s451396usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1001514
-expid=625201441 -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/1001514/
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 625201441.03062 or about 2020:298:03:03:56 UT
Found 918 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 7% of the srclist region. Found 161 sources in
srclist catalog. Found 48 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 10 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
20.53 mag. Found 56 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 6% 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?
625201441 876 WHITE 125.95235 3.35407 19.03/19.2 1.4 srclist Yes
625201441 876 WHITE 125.95223 3.35403 18.38/20.5 1.5 image Yes
List afterglow candidates for other finding charts.
625201060 495 WHITE 125.95222 3.35407 18.41/19.2 1.3 srclist Yes
625201060 495 WHITE 125.95229 3.35403 17.85/20.6 1.5 image Yes
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 3.35403
GRB_ERROR: 0.63
GRB_RA: 125.95223
IMAGE_START_TIME: 03:03:56
MAGNITUDE: 18.38
MAG_ERROR: 0.15
MESSAGE_TYPE: ACK
SOURCE: XRT