srclist overlap message for exposure 2 of trigger 1036139
uvot_overlap.pl vrs. 2010-12-20b fem started at 210308d16h45m23s453894usUT
The observation of trigger 1036139 started 2021-03-07T08:48:17.6
Examining file ./1036139_g338_uvot_sky_srclist.fits
The exposure ID is 636799697
The exposure time is undefined.
The filter is U.
The uvot region is centered at (119.2348,-66.9740) with a roll angle of 229.6
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 (119.1900,-66.9630) with a radius of 3.000 arc min
This is 1.240 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 (119.2383,-66.9709) with a radius of 0.025 arc min
This is 0.201 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 1036139
find_uvot_ag.pl vrs. 2020-10-30 fem started at 210308d16h45m32s859031usUT
Observation start time is 2021-03-07T08:48:17.6
Examining file ./1036139_g338_uvot_catalog_srclist.fits
The exposure ID is 636799697
The exposure is 249.924 sec.
The bin size is 2 pixels
The filter is U
There are 128 detected source(s) for 1036139_g338
Aspect correction adds -0.00075 degrees (-0.180 sec of time = -1.06 arc sec) to RA
Aspect correction adds -0.00063 degrees (-2.29 arcsec) to Dec
Total aspect correction is 2.52 arcsec
Star catalogs centered at 119.2347 , -66.9742 with radius 6.26 arc min.
n_usno: 906 n_gsc: 0
*** WARNING -- bright star catalog has 3 entries brighter than 12 mag
The brightest has mag 9.94
RA DEC Mag Color
bright star 0: 119.42639 (07:57:42.33) -67.01341 (-67:00:48.3) 10.04 USNO-V
bright star 1: 119.01690 (07:56:04.06) -66.99528 (-66:59:43.0) 10.26 USNO-V
bright star 2: 119.24188 (07:56:58.05) -66.87467 (-66:52:28.8) 9.94 USNO-R
Mean distance difference (CAT_DELTA) for 89 matched entries is 0.921" for 1036139_g338
Mean and std. dev of mag. difference (MAG_DELTA) are 1.605 and 0.601 for 1036139_g338
Found 45 entries without IDs and 1 entries that are acceptable afterglow candidates for 1036139_g338.
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.
34 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=119.1900 (07:56:45.60) DEC=-66.9630 (-66:57:46.8)
XRT distances are from RA=119.2383 (07:56:57.19) DEC=-66.9709 (-66:58:15.3)
*** WARNING 35 per cent of entries have no IDs.
-----------------
Entry 21 in the list of sources is a candidate afterglow for 1036139_g338 with 3x3 stamp
ra=119.16739 (07:56:40.17) dec=-66.98880 (-66:59:19.7) +/- 1.1" mag=19.29+/-0.35
dist=118.8 REFID=111
*** The position of this source is inconsistent with the XRT position.
The position is 98.2 arc sec from the BAT position.
src: 21 srclist_match has ID
src: 21 distr. of nearby unmatched sources: 0 0 0 0 0
Found 3 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
119.1671 -66.9893 1.9 -1 USNO-B1 17.10 15.38 16.14 *
119.1605 -66.9841 19.4 -1 USNO-B1 20.14 19.56 19.82
119.1632 -66.9941 19.9 -1 USNO-B1 99.99 19.57 99.99
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:
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 18.12, XRT distances < 5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
srclist paragraph message for exposure 2 of trigger 1036139
------ Start for Possible Stand-alone Circular ----
In response to GRB210307 (Swift/BAT trigger 1036139) at 08:42:38 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
312 seconds after the BAT trigger. No credible afterglow candidate has been
found in the initial data products. The 2.7'x2.7' sub-image covers 100% of the
XRT error circle. The typical 3-sigma upper limit has been about 19.2 mag. The
8'x8' region for the list of sources generated on-board covers 100% of the XRT
error circle. The list of sources is typically complete to about 18.0 mag. No
correction has been made for the expected extinction corresponding to E(B-V) of
0.138.
------- notes for trigger 1036139 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 210308d16h45m35s434979usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1036139
-expid=636799697 -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/1036139/
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 636799697.57662 or about 2021:066:08:48:12 UT
Found 902 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 15% of the srclist region. Found 128 sources in
srclist catalog. Found 45 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
18.12 mag.
Found 17 source(s) in Genie image catalog. Found 1 Genie image source(s)
without IDs. There are 0 good candidate(s) in the Genie image catalog. Good
candidates must be brighter than 20.67 mag. Found 159 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
16% of the Genie image region.
Genie image analysis:
Found 11113.0 counts in the large background region of 5880.0 pixels or a rate
of 1.890 counts/pixel in a radius of 45.0 arcsec. Based on this background, the
typical 5-sigma UL at a random point in the Genie image is 19.97 mag. for a
4-arcsec aperture.
Found 345.5 counts in the XRT position region of 200.0 pixels or a rate of
1.728 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is -0.119 +/- 0.081 (1-sigma) cps. The
3-sigma UL at the XRT position is 0.243 cps or 19.73 mag. The closest srclist
source has ra= 119.2304 dec= -66.9668 mag=17.41 sep=18.46". The closest Genie
source has ra= 119.2303 dec= -66.9667 mag=16.76 sep=18.90".
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?
636799697 311 U srclist found no candidates.
636799697 311 U image found no candidates.
List afterglow candidates for other finding charts.
636799485 99 WHITE srclist found no candidates.
636799485 99 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: -66.97092
GRB_ERROR: 5
GRB_RA: 119.23829
IMAGE_START_TIME: 08:48:12
MAGNITUDE: 19.7
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT