image overlap message for exposure 2 of trigger 981957
uvot_overlap.pl vrs. 2010-12-20b fem started at 200712d06h35m54s167143usUT
The observation of trigger 981957 started 2020-07-11T11:19:35.6
Examining file ./981957_g898_uvot_sky_image.fits
The exposure ID is 616159175
The exposure time is 125.591 (seconds)
The filter is WHITE.
The uvot region is centered at (286.0144,-0.1409) with a roll angle of 347.2
It is square with sides of 2.68 arc min. for an area of 7.17 sq arc min
The BAT error circle is centered at (285.9770,-0.1360) with a radius of 3.000 arc min
This is 2.265 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 5.29 sq. arc min or 0.19 of the BAT error circle
The XRT error circle is centered at (285.9702,-0.1471) with a radius of 0.027 arc min
This is 2.679 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 0.000 sq. arc min or 0.00 of the XRT error circle
image afterglow message for exposure 2 of trigger 981957
find_uvot_ag.pl vrs. 2017-02-17 fem started at 200712d06h36m40s725430usUT
Observation start time is 2020-07-11T11:19:35.6
Examining file ./981957_g898_uvot_catalog_image.fits
The exposure ID is 616159175
The exposure is 125.591 sec.
The bin size is 2 pixels
The filter is WHITE
There are 70 detected source(s) for 981957_g898
Aspect correction adds 0.00005 degrees (0.013 sec of time = 0.20 arc sec) to RA
Aspect correction adds 0.00223 degrees ( 8.03 arcsec) to Dec
Total aspect correction is 8.03 arcsec
Star catalogs centered at 286.0048 , -0.1403 with radius 3.11 arc min.
n_usno: 1438 n_gsc: 0
*** WARNING -- bright star catalog has 2 entries brighter than 12 mag
The brightest has mag 10.90626
RA DEC Mag Color
bright star 0: 285.98651 (19:03:56.76) -0.12119 (-00:07:16.3) 10.91 USNO-V
bright star 1: 286.04332 (19:04:10.40) -0.11639 (-00:06:59.0) 11.95 USNO-V
Mean distance difference (CAT_DELTA) for 71 matched entries is 0.763" for 981957_g898
Mean and std. dev of mag. difference (MAG_DELTA) are 1.087 and 0.745 for 981957_g898
Found 4 entries without IDs and 2 entries that are acceptable afterglow candidates for 981957_g898.
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=285.9770 (19:03:54.48) DEC=-0.1360 (-00:08:09.6)
XRT distances are from RA=285.9702 (19:03:52.85) DEC=-0.1471 (-00:08:49.5)
-----------------
Entry 48 in the list of sources is a candidate afterglow for 981957_g898 with genie
ra=286.02360 (19:04:05.66) dec=-0.14629 (-00:08:46.6) +/- 0.6" mag=17.11+/-0.14
dist=192.2 REFID=39 major=1.0 minor=0.9 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 171.8 arc sec from the BAT position.
Found 15 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
286.0186 -0.1479 18.8 -1 USNO-B1 20.82 19.30 19.97
286.0203 -0.1442 13.9 -1 USNO-B1 99.99 18.77 99.99
286.0210 -0.1446 11.3 -1 USNO-B1 18.33 18.13 18.22
286.0209 -0.1455 10.2 -1 USNO-B1 19.89 18.77 19.27
286.0202 -0.1487 14.9 -1 USNO-B1 17.54 15.09 16.18
286.0198 -0.1502 19.5 -1 USNO-B1 16.82 14.57 15.57
286.0227 -0.1425 13.9 -1 USNO-B1 16.59 14.72 15.55
286.0231 -0.1458 2.4 -1 USNO-B1 19.05 14.34 16.43 *
286.0241 -0.1455 3.4 -1 USNO-B1 16.46 13.68 14.91 *
286.0250 -0.1449 7.1 -1 USNO-B1 17.61 99.99 99.99
286.0242 -0.1514 18.4 -1 USNO-B1 18.77 18.10 18.40
286.0255 -0.1494 13.1 -1 USNO-B1 18.74 17.71 18.17
286.0274 -0.1478 14.6 -1 USNO-B1 99.99 16.39 99.99
286.0277 -0.1478 15.7 -1 USNO-B1 18.14 16.37 17.15
286.0271 -0.1501 18.7 -1 USNO-B1 19.54 18.58 19.01
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 3.5" or brighter than 12 mag
-----------------
Entry 52 in the list of sources is a candidate afterglow for 981957_g898 with genie
ra=286.02614 (19:04:06.27) dec=-0.12223 (-00:07:20.0) +/- 0.6" mag=16.39+/-0.14
dist=220.3 REFID=6 major=0.7 minor=0.5 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 183.7 arc sec from the BAT position.
This source is near the edge of image (0.961)
Found 15 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
286.0235 -0.1263 17.4 -1 USNO-B1 20.22 19.38 19.75
286.0233 -0.1242 12.4 -1 USNO-B1 20.59 19.10 19.76
286.0251 -0.1263 15.3 -1 USNO-B1 18.87 18.30 18.56
286.0223 -0.1227 13.9 -1 USNO-B1 16.45 15.36 15.84
286.0265 -0.1277 19.6 -1 USNO-B1 19.32 18.21 18.70
286.0233 -0.1191 15.2 -1 USNO-B1 18.27 18.02 18.13
286.0262 -0.1210 4.5 -1 USNO-B1 15.21 99.99 99.99 *
286.0267 -0.1214 3.5 -1 USNO-B1 13.53 11.59 12.45 *
286.0274 -0.1217 5.1 -1 USNO-B1 13.43 12.52 12.92 *
286.0302 -0.1248 17.1 -1 USNO-B1 99.99 18.88 99.99
286.0291 -0.1222 10.5 -1 USNO-B1 17.46 99.99 99.99
286.0262 -0.1184 13.8 -1 USNO-B1 18.34 17.27 17.75
286.0271 -0.1174 17.8 -1 USNO-B1 99.99 19.46 99.99
286.0296 -0.1196 15.5 -1 USNO-B1 20.74 20.24 20.46
286.0311 -0.1206 18.6 -1 USNO-B1 21.11 99.99 99.99
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 5.25" or brighter than 12 mag
Found 2 entries in star catalog(s) within 10" of the XRT position.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
285.9718 -0.1472 5.6 -1 USNO-B1 20.49 19.91 20.17
285.9681 -0.1455 9.7 -1 USNO-B1 20.55 20.04 20.26
The closest star is 5.62" away.
List UVOT sources within 10" of the XRT position:
There are 63187.809 counts in the bkg source region of 4505.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 14.026 counts/pixel (5-sig UL in 4" is 19.72 mag) for 981957_g898
Do not compute counts in XRT region because position is too far from center.
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 20.28, XRT distances < 5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 981957_616159175_200712d06h36m40s725430usUT_bkg.region
# Region file format: DS9 version 3.0
global color=red font="helvetica 10 normal" select=1 edit=1 move=1 delete=1 include=1 fixed=0 source
fk5;circle(286.0144,-0.1409,45")
fk5;-circle(286.001152936097,-0.13683983195724,6")
fk5;-circle(286.004910811517,-0.148885571162813,6")
fk5;-circle(286.007705415905,-0.134219181269382,6")
fk5;-circle(286.007288494162,-0.129756363431259,6")
fk5;-circle(286.009286780529,-0.146643688022555,6")
fk5;-circle(286.012413221744,-0.140933220830925,6")
fk5;-circle(286.013020890026,-0.138198452540894,6")
fk5;-circle(286.012597438833,-0.128636609606488,6")
fk5;-circle(286.010723103482,-0.150580668009053,6")
fk5;-circle(286.014121443977,-0.136773246583678,6")
fk5;-circle(286.012825640646,-0.148087263798912,6")
fk5;-circle(286.0145575581,-0.131206514348566,6")
fk5;-circle(286.018577330882,-0.129725506908669,6")
fk5;-circle(286.020211915886,-0.140427707753769,6")
fk5;-circle(286.020299177086,-0.148612271343111,6")
fk5;-circle(286.02001579283,-0.151406099410429,6")
fk5;-circle(286.022708601388,-0.14251923315682,6")
fk5;-circle(286.023334550502,-0.136038223698383,6")
fk5;-circle(286.023625918073,-0.131452661291943,6")
fk5;-circle(286.023597487803,-0.146287165120848,6")
fk5;-circle(286.025075859854,-0.144905599655098,6")
image paragraph message for exposure 2 of trigger 981957
THIS MESSAGE IS *NOT* READY FOR DISTRIBUTION.
MORE ANALYSIS IS REQUIRED TO DETERMINE WHETHER THERE IS AN AFTERGLOW CANDIDATE.
IMAGE PROBLEM: no overlap
SRCLIST PROBLEM: high density of stars, srclist filled telemetry buffer
See notes for more details.
WARNING -- because of the LARGE EXTINCTION, results should be used cautiously.
------ Start for Possible Stand-alone Circular ----
In response to GRB200711 (Swift/BAT trigger 981957) at 11:04:36 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 126 seconds with the White filter
starting 873 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 none of
the XRT error circle. The 8'x8' region for the list of sources generated
on-board covers 100% of the XRT error circle. Because of the density of
catalogued stars, further analysis is required to report an upper limit for any
afterglow in the region. No correction has been made for the large, but
uncertain, extinction expected.
------- notes for trigger 981957 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 200712d06h36m47s381088usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=981957
-expid=616159175 -meonly -msg_image
Results from standard processing of UVOT TDRSS data for this trigger should be
available at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/981957/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
Unreliable extinction found for xrt position. XRT position found for srclist.
XRT position found for Genie image. BAT position found.
UVOT exposure began at MET 616159175.6151 or about 2020:193:11:19:30 UT
Found 5000 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 59% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 38 srclist
source(s) without IDs. There are 0 good candidate(s) in the srclist catalog.
Good candidates must be brighter than 19.12 mag.
Found 70 source(s) in Genie image catalog. Found 4 Genie image source(s)
without IDs. There are 0 good candidate(s) in the Genie image catalog. Good
candidates must be brighter than 20.28 mag. Found 1434 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
102% of the Genie image region.
Genie image analysis:
Found 63187.8 counts in the large background region of 4505.0 pixels or a rate
of 14.026 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 19.73 mag. for a
4-arcsec aperture. The number of srclist sources filled the available
telemetry. The weakest source detected was 18.93 mag. The closest srclist
source has ra= 285.9680 dec= -0.1496 mag=17.57 sep=12.13". The closest Genie
source has ra= 285.9912 dec= -0.1471 mag=18.23 sep=75.43".
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?
616159175 873 WHITE srclist found no candidates.
616159175 873 WHITE image found no candidates.
List afterglow candidates for other finding charts.
616158471 169 WHITE srclist found no candidates.
616158471 169 WHITE image found no candidates.
------- Tokens for Quick GCN -------