srclist overlap message for exposure 3 of trigger 965638
uvot_overlap.pl vrs. 2010-12-20b fem started at 200410d07h19m39s550859usUT
The observation of trigger 965638 started 2020-04-10T02:40:06.9
Examining file ./965638_g895_uvot_sky_srclist.fits
The exposure ID is 608179206
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (299.6451,51.7648) with a roll angle of 93.2
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 (299.6370,51.7630) with a radius of 3.000 arc min
This is 0.322 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 (299.6459,51.7808) with a radius of 0.032 arc min
This is 0.957 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 3 of trigger 965638
find_uvot_ag.pl vrs. 2017-02-17 fem started at 200410d07h20m00s522537usUT
Observation start time is 2020-04-10T02:40:06.9
Examining file ./965638_g895_uvot_catalog_srclist.fits
The exposure ID is 608179206
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 190 detected source(s) for 965638_g895
*** WARNING -- the sources have filled the available telemetry buffer (190).
srclist_overlap returned: bat_overlap 1.000
srclist_overlap returned: xrt_overlap 1.000
Dimmest detected source in 965638_g895 has mag 18.58
Aspect correction adds 0.00255 degrees (0.611 sec of time = 5.67 arc sec) to RA
Aspect correction adds 0.00042 degrees ( 1.52 arcsec) to Dec
Total aspect correction is 5.87 arcsec
Star catalogs centered at 299.6646 , 51.7905 with radius 8.06 arc min.
n_usno: 2097 n_gsc: 0
*** WARNING -- bright star catalog has 13 entries brighter than 12 mag
The brightest has mag 9.33636
RA DEC Mag Color
bright star 0: 299.69499 (19:58:46.80) 51.80669 (+51:48:24.1) 11.67 USNO-V
bright star 1: 299.70880 (19:58:50.11) 51.77081 (+51:46:14.9) 11.12 USNO-V
bright star 2: 299.58449 (19:58:20.28) 51.74991 (+51:44:59.7) 11.71 USNO-V
bright star 3: 299.55699 (19:58:13.68) 51.78192 (+51:46:54.9) 11.74 USNO-V
bright star 4: 299.71385 (19:58:51.32) 51.71974 (+51:43:11.1) 11.99 USNO-V
bright star 5: 299.69835 (19:58:47.60) 51.71152 (+51:42:41.5) 11.11 USNO-V
bright star 6: 299.70179 (19:58:48.43) 51.71208 (+51:42:43.5) 9.34 USNO-V
bright star 7: 299.70518 (19:58:49.24) 51.71214 (+51:42:43.7) 10.27 USNO-V
bright star 8: 299.60359 (19:58:24.86) 51.70079 (+51:42:02.9) 10.42 USNO-V
bright star 9: 299.45943 (19:57:50.26) 51.79385 (+51:47:37.8) 10.53 USNO-V
bright star 10: 299.46409 (19:57:51.38) 51.82973 (+51:49:47.0) 9.75 USNO-V
bright star 11: 299.49641 (19:57:59.14) 51.87218 (+51:52:19.9) 11.24 USNO-V
bright star 12: 299.55981 (19:58:14.35) 51.90714 (+51:54:25.7) 11.42 USNO-V
Mean distance difference (CAT_DELTA) for 183 matched entries is 0.684" for 965638_g895
Mean and std. dev of mag. difference (MAG_DELTA) are 1.391 and 0.402 for 965638_g895
Found 11 entries without IDs and 2 entries that are acceptable afterglow candidates for 965638_g895.
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.
4 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=299.6370 (19:58:32.88) DEC=51.7630 (+51:45:46.8)
XRT distances are from RA=299.6459 (19:58:35.02) DEC=51.7808 (+51:46:50.8)
-----------------
Entry 0 in the list of sources is a candidate afterglow for 965638_g895 with 1x1 stamp
ra=299.64452 (19:58:34.69) dec=51.76184 (+51:45:42.6) +/- 1.1" mag=17.84+/-0.35
dist=68.3 REFID=133
*** The position of this source is inconsistent with the XRT position.
The position is 17.3 arc sec from the BAT position.
src: 0 srclist_match has ID
src: 0 distr. of nearby unmatched sources: 0 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
299.6478 51.7612 7.6 -1 USNO-B1 99.99 19.15 99.99
299.6451 51.7614 2.0 -1 USNO-B1 17.28 15.59 16.34 *
299.6456 51.7609 4.2 -1 USNO-B1 17.97 15.11 16.38
299.6461 51.7600 7.6 -1 USNO-B1 18.61 15.64 16.96
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 51 in the list of sources is a candidate afterglow for 965638_g895 with 3x3 stamp
ra=299.65274 (19:58:36.66) dec=51.71243 (+51:42:44.7) +/- 1.1" mag=13.86+/-0.35
dist=246.5 REFID=3
*** The position of this source is inconsistent with the XRT position.
The position is 185.4 arc sec from the BAT position.
src: 51 distr. of nearby unmatched sources: 1 0 0 0 0
Found 8 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
299.6548 51.7172 17.7 -1 USNO-B1 20.08 17.65 18.73
299.6564 51.7168 17.9 -1 USNO-B1 19.88 18.49 19.10
299.6526 51.7153 10.3 -1 USNO-B1 20.17 18.34 19.15
299.6603 51.7134 17.4 -1 USNO-B1 20.18 18.84 19.43
299.6470 51.7125 12.7 -1 USNO-B1 99.99 18.47 99.99
299.6528 51.7118 2.1 -1 USNO-B1 13.25 11.36 12.20 *
299.6483 51.7112 11.0 -1 USNO-B1 20.12 19.22 19.62
299.6542 51.7082 15.6 -1 USNO-B1 18.56 16.74 17.55
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 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
299.6478 51.7809 4.2 -1 USNO-B1 20.05 17.87 18.84
299.6440 51.7822 6.7 -1 USNO-B1 18.92 17.54 18.15
The closest star is 4.21" away.
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 3 of trigger 965638
SRCLIST PROBLEM: srclist filled telemetry buffer
2 source(s) near the XRT position were rejected as afterglow candidate(s). See
notes for details.
------ Start for Possible Stand-alone Circular ----
In response to GRB200410 (Swift/BAT trigger 965638) at 02:25:10 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 871 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
0.15.
------- notes for trigger 965638 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 200410d07h20m04s940944usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=965638
-expid=608179206 -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/965638/
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 608179206.87046 or about 2020:101:02:40:01 UT
Found 2093 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 22% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 11 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 31 source(s) in Genie image catalog. 2 source(s) are within 10.0" of the
xrt position. 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
20.44 mag. Found 169 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 19% of the Genie image region.
Genie image analysis:
Found 75685.9 counts in the large background region of 5074.0 pixels or a rate
of 14.916 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 19.88 mag. for a
4-arcsec aperture.
Found 3676.5 counts in the XRT position region of 198.0 pixels or a rate of
18.568 counts/pixel in a radius of 8.0 arcsec. The net count rate (using large
background region) at the XRT position is 4.820 +/- 0.411 (1-sigma) cps or
18.07 mag and a range from 17.98 to 18.17 mag. The 3-sigma UL at the XRT
position is 6.052 cps or 17.83 mag. The number of srclist sources filled the
available telemetry. The weakest source detected was 18.58 mag. The closest
srclist source has ra= 299.6364 dec= 51.7741 mag=17.37 sep=32.07".
Found 2 Genie source(s) within 10.0" of the XRT position. The brightest such
source has ra= 299.6480 dec= 51.7809 mag=19.91 sep=4.67". The closest Genie
source has ra= 299.6480 dec= 51.7809 mag=19.91 sep=4.67".
Report rejected UVOT sources within 10 arcsec XRT position.
Such sources are usually NOT the afterglow.
****THIS SOURCE NEAR XRT POSITION WAS REJECTED--USE WITH CAUTION****
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 871 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 19:58:35.52 = 299.64801
DEC(J2000) = +51:46:51.3 = 51.78091
with a 90%-confidence error radius of about 0.73 arc sec. This position is 4.67
arc sec. from the center of the XRT error circle. The estimated magnitude is
19.91 with a 1-sigma error of about 0.20. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.15.
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?
608179206 870 WHITE srclist found no candidates.
608179206 870 WHITE image found no candidates.
List afterglow candidates for other finding charts.
608178439 103 WHITE srclist found no candidates.
608178439 103 WHITE image found no candidates.
608178651 315 U srclist found no candidates.
608178651 315 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 51.78078
GRB_ERROR: 5
GRB_RA: 299.64592
IMAGE_START_TIME: 02:40:01
MAGNITUDE: 17.8
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT