srclist overlap message for exposure 1 of trigger 957271
uvot_overlap.pl vrs. 2010-12-20b fem started at 200219d16h53m26s724944usUT
The observation of trigger 957271 started 2020-02-19T07:38:28.5
Examining file ./957271_g98_uvot_sky_srclist.fits
The exposure ID is 603790708
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (342.6456,-59.1033) with a roll angle of 346.2
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 (342.6440,-59.1080) with a radius of 3.000 arc min
This is 0.288 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 (342.6384,-59.1196) with a radius of 0.030 arc min
This is 1.003 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 957271
find_uvot_ag.pl vrs. 2017-02-17 fem started at 200219d16h53m31s459423usUT
Observation start time is 2020-02-19T07:38:28.5
Examining file ./957271_g98_uvot_catalog_srclist.fits
The exposure ID is 603790708
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 28 detected source(s) for 957271_g98
Aspect correction adds 0.00135 degrees (0.325 sec of time = 2.50 arc sec) to RA
Aspect correction adds 0.00099 degrees ( 3.56 arcsec) to Dec
Total aspect correction is 4.35 arcsec
Star catalogs centered at 342.6428 , -59.1080 with radius 5.96 arc min.
n_usno: 321 n_gsc: 0
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 7.3176
RA DEC Mag Color
bright star 0: 342.79871 (22:51:11.69) -59.09736 (-59:05:50.5) 7.32 USNO-V
Mean distance difference (CAT_DELTA) for 24 matched entries is 0.631" for 957271_g98
Mean and std. dev of mag. difference (MAG_DELTA) are 1.712 and 0.431 for 957271_g98
Found 4 entries without IDs and 2 entries that are acceptable afterglow candidates for 957271_g98.
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.
0 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=342.6440 (22:50:34.56) DEC=-59.1080 (-59:06:28.8)
XRT distances are from RA=342.6384 (22:50:33.21) DEC=-59.1196 (-59:07:10.4)
-----------------
Entry 13 in the list of sources is a candidate afterglow for 957271_g98 with 5x5 stamp
ra=342.55166 (22:50:12.40) dec=-59.12980 (-59:07:47.3) +/- 1.1" mag=18.76+/-0.35
dist=164.4 REFID=24
*** The position of this source is inconsistent with the XRT position.
The position is 187.8 arc sec from the BAT position.
src: 13 distr. of nearby unmatched sources: 1 0 0 0 0
Found 4 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
342.5510 -59.1276 8.0 -1 USNO-B1 20.70 19.16 19.84
342.5504 -59.1268 10.9 -1 USNO-B1 20.12 18.76 19.36
342.5481 -59.1255 16.9 -1 USNO-B1 20.63 19.36 19.92
342.5508 -59.1301 2.0 -1 USNO-B1 18.04 15.71 16.74 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 21 in the list of sources is a candidate afterglow for 957271_g98 with 5x5 stamp
ra=342.57404 (22:50:17.77) dec=-59.06659 (-59:03:59.7) +/- 1.1" mag=19.56+/-0.35
dist=224.8 REFID=28
*** The position of this source is inconsistent with the XRT position.
The position is 197.4 arc sec from the BAT position.
src: 21 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
342.5824 -59.0671 15.5 -1 USNO-B1 14.84 12.97 13.80 *
342.5692 -59.0670 9.1 -1 USNO-B1 20.68 19.42 19.98
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 19.22, 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 1 of trigger 957271
------ Start for Possible Stand-alone Circular ----
In response to GRB200219 (Swift/BAT trigger 957271) at 07:36:49 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 74 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 19.6 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 mag. No
correction has been made for the expected extinction corresponding to E(B-V) of
0.02.
------- notes for trigger 957271 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 200219d16h53m36s927936usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=957271
-expid=603790708 -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/957271/
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 603790708.5315 or about 2020:050:07:38:23 UT
Found 317 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 4 srclist source(s) without IDs. There are 0 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 20.20 mag. Found 49 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 5% of the
Genie image region.
Genie image analysis:
Found 142516.6 counts in the large background region of 6144.0 pixels or a rate
of 23.196 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 19.64 mag. for a
4-arcsec aperture.
Found 4610.4 counts in the XRT position region of 198.0 pixels or a rate of
23.285 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 0.245 +/- 0.489 (1-sigma) cps or
21.31 mag and a range from 20.11 to 99.99 mag. The 3-sigma UL at the XRT
position is 1.714 cps or 19.20 mag. The closest srclist source has ra= 342.6347
dec= -59.1137 mag=18.19 sep=22.18". The closest Genie source has ra= 342.6340
dec= -59.1137 mag=17.59 sep=22.47".
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?
603790708 74 WHITE srclist found no candidates.
603790708 74 WHITE image found no candidates.
List afterglow candidates for other finding charts.
603790920 286 U srclist found no candidates.
603790920 286 U image found no candidates.
603791499 865 WHITE srclist found no candidates.
603791499 865 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: -59.11956
GRB_ERROR: 5
GRB_RA: 342.63837
IMAGE_START_TIME: 07:38:23
MAGNITUDE: 19.2
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT