image overlap message for exposure 1 of trigger 1040123
uvot_overlap.pl vrs. 2010-12-20b fem started at 210403d12h55m44s438875usUT
The observation of trigger 1040123 started 2021-04-02T22:06:26.8
Examining file ./1040123_g639093986_uvot_sky_image.fits
The exposure ID is 639093986
The exposure time is 149.813 (seconds)
The filter is WHITE.
The uvot region is centered at (198.2591,44.5172) with a roll angle of 7.7
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 (198.2587,44.5129) with a radius of 3.000 arc min
This is 0.260 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 (198.2593,44.5145) with a radius of 0.033 arc min
This is 0.162 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
image afterglow message for exposure 1 of trigger 1040123
find_uvot_ag.pl vrs. 2020-10-30 fem started at 210403d12h56m13s334556usUT
Observation start time is 2021-04-02T22:06:26.8
Examining file ./1040123_g639093986_uvot_catalog_image.fits
The exposure ID is 639093986
The exposure is 149.813 sec.
The bin size is 2 pixels
The filter is WHITE
There are 12 detected source(s) for 1040123_g639093986
Aspect correction adds -0.00057 degrees (-0.138 sec of time = -1.47 arc sec) to RA
Aspect correction adds 0.00039 degrees ( 1.42 arcsec) to Dec
Total aspect correction is 2.05 arcsec
Star catalogs centered at 198.2519 , 44.5195 with radius 2.56 arc min.
n_usno: 47 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 9 matched entries is 1.707" for 1040123_g639093986
Mean and std. dev of mag. difference (MAG_DELTA) are 0.557 and 0.316 for 1040123_g639093986
Found 3 entries without IDs and 3 entries that are acceptable afterglow candidates for 1040123_g639093986.
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.
Magnitude criteria will be applied later.
BAT distances are from RA=198.2587 (13:13:02.09) DEC=44.5129 (+44:30:46.4)
XRT distances are from RA=198.2593 (13:13:02.22) DEC=44.5145 (+44:30:52.3)
-----------------
Entry 8 in the list of sources is a candidate afterglow for 1040123_g639093986 with genie
ra=198.25323 (13:13:00.78) dec=44.54111 (+44:32:28.0) +/- 0.6" mag=17.36+/-0.14
dist=96.9 REFID=4 major=3.7 minor=2.8 flag=19 (neighbor+blended+aperture_incomplete)
*** The position of this source is inconsistent with the XRT position.
The position is 102.5 arc sec from the BAT position.
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
198.2520 44.5435 9.0 -1 USNO-B1 99.99 19.26 99.99
198.2592 44.5437 18.0 -1 USNO-B1 20.04 19.52 19.75
198.2526 44.5456 16.3 -1 USNO-B1 12.79 13.09 12.96
198.2491 44.5457 19.5 -1 USNO-B1 19.72 19.02 19.33
*** If XRT position is correct, then this is NOT the afterglow
*** unacceptable major profile of 3.7
-----------------
Entry 9 in the list of sources is a candidate afterglow for 1040123_g639093986 with genie
ra=198.25021 (13:13:00.05) dec=44.54166 (+44:32:30.0) +/- 0.6" mag=18.11+/-0.14
dist=100.4 REFID=5 major=3.0 minor=1.9 flag=19 (neighbor+blended+aperture_incomplete)
*** The position of this source is inconsistent with the XRT position.
The position is 105.8 arc sec from the BAT position.
This source is near the edge of image (0.876)
Found 3 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
198.2520 44.5435 8.0 -1 USNO-B1 99.99 19.26 99.99
198.2526 44.5456 15.5 -1 USNO-B1 12.79 13.09 12.96
198.2491 44.5457 14.7 -1 USNO-B1 19.72 19.02 19.33
*** If XRT position is correct, then this is NOT the afterglow
*** unacceptable major profile of 3.0
-----------------
Entry 10 in the list of sources is a candidate afterglow for 1040123_g639093986 with genie
ra=198.25689 (13:13:01.65) dec=44.54340 (+44:32:36.3) +/- 0.6" mag=17.55+/-0.14
dist=104.1 REFID=3 major=5.1 minor=3.1 flag=19 (neighbor+blended+aperture_incomplete)
*** The position of this source is inconsistent with the XRT position.
The position is 109.9 arc sec from the BAT position.
This source is near the edge of image (0.923)
Found 3 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
198.2520 44.5435 12.5 -1 USNO-B1 99.99 19.26 99.99
198.2592 44.5437 6.1 -1 USNO-B1 20.04 19.52 19.75
198.2526 44.5456 13.5 -1 USNO-B1 12.79 13.09 12.96
*** If XRT position is correct, then this is NOT the afterglow
*** unacceptable major profile of 5.1
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are 37126.273 counts in the bkg source region of 5971.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 6.218 counts/pixel (5-sig UL in 4" is 20.36 mag) for 1040123_g639093986
There are 1238.8066 counts in the xrt source region of 204.00000 pixels.
Rate in xrt region with 8 arcsec radius is 6.073 counts/pixel for 1040123_g639093986
There are 7135.7817 counts in the xrt_bkg source region of 1156.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 6.173 counts/pixel (5-sig UL in 4" is 20.36 mag) for 1040123_g639093986
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 20.91, 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: 1040123_639093986_210403d12h56m13s334556usUT_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(198.2591,44.5172,45")
fk5;-circle(198.264770213205,44.5091965787927,6")
fk5;-circle(198.249746174828,44.5181954785721,6")
fk5;-circle(198.271767818721,44.52007724538,6")
Region file: 1040123_639093986_210403d12h56m13s334556usUT_xrt.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(198.25925,44.51453,8")
Region file: 1040123_639093986_210403d12h56m13s334556usUT_xrt_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(198.25925,44.51453,25")
fk5;-circle(198.25925,44.51453,15")
fk5;-circle(198.264770213205,44.5091965787927,6")
fk5;-circle(198.249746174828,44.5181954785721,6")
image paragraph message for exposure 1 of trigger 1040123
------ Start for Possible Stand-alone Circular ----
In response to GRB210402 (Swift/BAT trigger 1040123) at 22:04:17 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 103 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
0.018.
------- notes for trigger 1040123 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 210403d12h56m17s493015usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1040123
-expid=639093986 -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/1040123/
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 639093986.8354 or about 2021:092:22:06:21 UT
Found 200 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 3% of the srclist region. Found 23 sources in
srclist catalog. Found 9 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 12 source(s) in Genie image catalog. Found 3 Genie image source(s)
without IDs. There are 0 good candidate(s) in the Genie image catalog. Good
candidates must be brighter than 20.91 mag. Found 43 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
4% of the Genie image region.
Genie image analysis:
Found 37126.3 counts in the large background region of 5971.0 pixels or a rate
of 6.218 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 20.18 mag. for a
4-arcsec aperture.
Found 1238.8 counts in the XRT position region of 204.0 pixels or a rate of
6.073 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is -0.136 +/- 0.255 (1-sigma) cps. The
3-sigma UL at the XRT position is 0.764 cps or 19.89 mag. The closest srclist
source has ra= 198.2650 dec= 44.5095 mag=19.27 sep=23.47". The closest Genie
source has ra= 198.2648 dec= 44.5092 mag=17.93 sep=23.86".
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?
639093986 102 WHITE srclist found no candidates.
639093986 102 WHITE image found no candidates.
List afterglow candidates for other finding charts.
639094145 261 U srclist found no candidates.
639094145 261 U image found no candidates.
639094702 818 WHITE srclist found no candidates.
639094702 818 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 44.51453
GRB_ERROR: 5
GRB_RA: 198.25925
IMAGE_START_TIME: 22:06:21
MAGNITUDE: 19.9
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT