image overlap message for exposure 1 of trigger 1033144
uvot_overlap.pl vrs. 2010-12-20b fem started at 210217d08h25m28s602193usUT
The observation of trigger 1033144 started 2021-02-17T08:13:04.7
Examining file 1033144_g102_uvot_sky_image.fits
The exposure ID is 635242384
The exposure time is 149.868 (seconds)
The filter is WHITE.
The uvot region is centered at (277.6529,-6.7330) with a roll angle of 99.8
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 (277.6460,-6.7350) with a radius of 3.000 arc min
This is 0.430 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 7.17 sq. arc min or 0.25 of the BAT error circle
The XRT error circle is centered at (277.6728,-6.7544) with a radius of 0.070 arc min
This is 1.745 arc min from the center of the uvot region
The area of the XRT error circle is 0.015 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 1 of trigger 1033144
find_uvot_ag.pl vrs. 2020-10-30 fem started at 210217d08h25m30s622598usUT
Observation start time is 2021-02-17T08:13:04.7
Examining file 1033144_g102_uvot_catalog_image.fits
The exposure ID is 635242384
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 37 detected source(s) for 1033144_g102
Aspect correction adds 0.00088 degrees (0.210 sec of time = 3.13 arc sec) to RA
Aspect correction adds 0.00065 degrees ( 2.33 arcsec) to Dec
Total aspect correction is 3.90 arcsec
Star catalogs centered at 277.6559 , -6.7312 with radius 2.69 arc min.
n_usno: 615 n_gsc: 0
*** WARNING -- bright star catalog has 3 entries brighter than 12 mag
The brightest has mag 11.75
RA DEC Mag Color
bright star 0: 277.64114 (18:30:33.87) -6.72263 (-06:43:21.5) 12.00 USNO-R
bright star 1: 277.64008 (18:30:33.62) -6.72227 (-06:43:20.2) 11.80 USNO-R
bright star 2: 277.62251 (18:30:29.40) -6.73027 (-06:43:49.0) 11.75 USNO-R
Mean distance difference (CAT_DELTA) for 39 matched entries is 0.795" for 1033144_g102
Mean and std. dev of mag. difference (MAG_DELTA) are 2.152 and 0.664 for 1033144_g102
Found 1 entries without IDs and 1 entries that are acceptable afterglow candidates for 1033144_g102.
Acceptable entries have no ID, XRT distances < 10.5", 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=277.6460 (18:30:35.04) DEC=-6.7350 (-06:44:06.0)
XRT distances are from RA=277.6728 (18:30:41.46) DEC=-6.7544 (-06:45:15.8)
-----------------
Entry 35 in the list of sources is a candidate afterglow for 1033144_g102 with genie
ra=277.65618 (18:30:37.48) dec=-6.70768 (-06:42:27.7) +/- 0.6" mag=17.62+/-0.15
dist=178.3 REFID=4 major=0.9 minor=0.7 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 104.9 arc sec from the BAT position.
This source is near the edge of image (0.957)
Found 11 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
277.6570 -6.7113 13.2 -1 USNO-B1 20.29 17.86 18.94
277.6528 -6.7113 17.9 -1 USNO-B1 99.99 17.83 99.99
277.6567 -6.7107 10.9 -1 USNO-B1 18.91 18.14 18.48
277.6575 -6.7080 4.8 -1 USNO-B1 17.46 14.57 15.86 *
277.6510 -6.7083 18.7 -1 USNO-B1 15.73 13.58 14.54
277.6585 -6.7078 8.5 -1 USNO-B1 18.51 16.05 17.14
277.6580 -6.7078 6.4 -1 USNO-B1 16.45 14.07 15.13
277.6565 -6.7074 1.4 -1 USNO-B1 17.07 15.08 15.96 *
277.6578 -6.7068 6.8 -1 USNO-B1 99.99 15.99 99.99
277.6535 -6.7049 13.9 -1 USNO-B1 15.88 14.04 14.85
277.6601 -6.7043 18.7 -1 USNO-B1 16.82 14.63 15.61
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 1 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
277.6734 -6.7536 3.7 -1 USNO-B1 15.05 13.09 13.96
The closest star is 3.71" away.
List UVOT sources within 10" of the XRT position:
There are 2.2486238E+05 counts in the bkg source region of 5521.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 40.729 counts/pixel (5-sig UL in 4" is 19.34 mag) for 1033144_g102
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 19.89, XRT distances < 10.5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 1033144_635242384_210217d08h25m30s622598usUT_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(277.6529,-6.7330,45")
fk5;-circle(277.651028279318,-6.73417950369378,6")
fk5;-circle(277.652103070094,-6.73540214694424,6")
fk5;-circle(277.652063190559,-6.73022555407988,6")
fk5;-circle(277.644797991658,-6.74285727332963,6")
fk5;-circle(277.655406855973,-6.72981272670768,6")
fk5;-circle(277.656135522983,-6.73967878713871,6")
fk5;-circle(277.659628707881,-6.73681001039873,6")
fk5;-circle(277.649417600057,-6.71958642113215,6")
fk5;-circle(277.655005961928,-6.72142090581738,6")
fk5;-circle(277.662950406724,-6.74167058119743,6")
image paragraph message for exposure 1 of trigger 1033144
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 GRB210217 (Swift/BAT trigger 1033144) at 08:11:21 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 76 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 1033144 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 210217d08h25m33s801233usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1033144
-expid=635242384 -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/1033144/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
Unreliable extinction found for bat position. 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 635242384.65552 or about 2021:048:08:12:59 UT
Found 2854 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 55% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 15 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 37 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 19.89 mag. Found 611 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
58% of the Genie image region.
Genie image analysis:
Found 224862.4 counts in the large background region of 5521.0 pixels or a rate
of 40.729 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 19.16 mag. for a
4-arcsec aperture. The number of srclist sources filled the available
telemetry. The weakest source detected was 18.66 mag.
Found 1 srclist source(s) within 10.0" of the XRT position.
The brightest such source has ra= 277.6738 dec= -6.7531 mag=17.15 sep=6.09".
The closest srclist source has ra= 277.6738 dec= -6.7531 mag=17.15 sep=6.09".
The closest Genie source has ra= 277.6712 dec= -6.7431 mag=18.06 sep=40.94".
This paragraph is only useful if the XRT position is grossly wrong. There are 1
candidate(s) in the srclist data with mag < 18.66 inside the BAT error region,
but outside the XRT error region. The brightest such source is at RA=277.62911
(18:30:30.99), DEC=-6.69415 (-06:41:38.9) (J2000). It has a mag of 17.89. It is
159.0" from the BAT position.
****THIS SOURCE IS OUTSIDE XRT ERROR CIRCLE--USE WITH CAUTION***
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 76 seconds after the BAT trigger. There is a candidate afterglow in
the list of sources generated on-board at
RA(J2000) = 18:30:30.99 = 277.62911
DEC(J2000) = -06:41:38.9 = -6.69415
with a 90%-confidence error radius of about 1.10 arc sec. The estimated
magnitude is 17.89 with a 1-sigma error of about 0.35. No correction has been
made for the large, but uncertain, extinction expected.
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 76 seconds after the BAT trigger. There is a candidate afterglow in
the list of sources generated on-board at
RA(J2000) = 18:30:41.71 = 277.67380
DEC(J2000) = -06:45:11.0 = -6.75306
with a 90%-confidence error radius of about 1.10 arc sec. This position is 6.09
arc sec. from the center of the XRT error circle. The estimated magnitude is
17.15 with a 1-sigma error of about 0.35. No correction has been made for the
large, but uncertain, extinction expected.
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?
635242384 76 WHITE srclist found no candidates.
635242384 76 WHITE image found no candidates.
List afterglow candidates for other finding charts.
------- Tokens for Quick GCN -------