image overlap message for exposure 2 of trigger 1054681
uvot_overlap.pl vrs. 2010-12-20b fem started at 210611d04h13m20s673547usUT
The observation of trigger 1054681 started 2021-06-10T19:56:58.4
Examining file ./1054681_g330_uvot_sky_image.fits
The exposure ID is 645047818
The exposure time is 249.935 (seconds)
The filter is U.
The uvot region is centered at (243.9156,14.4018) with a roll angle of 337.9
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 (243.9390,14.3910) with a radius of 3.000 arc min
This is 1.507 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 7.05 sq. arc min or 0.25 of the BAT error circle
The XRT error circle is centered at (243.9188,14.3988) with a radius of 0.037 arc min
This is 0.260 arc min from the center of the uvot region
The area of the XRT error circle is 0.004 sq. arc min
The UVOT/XRT overlap is 0.004 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 2 of trigger 1054681
find_uvot_ag.pl vrs. 2020-10-30 fem started at 210611d04h13m34s723463usUT
Observation start time is 2021-06-10T19:56:58.4
Examining file ./1054681_g330_uvot_catalog_image.fits
The exposure ID is 645047818
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is U
There are 4 detected source(s) for 1054681_g330
Aspect correction adds 0.00046 degrees (0.111 sec of time = 1.62 arc sec) to RA
Aspect correction adds 0.00062 degrees ( 2.24 arcsec) to Dec
Total aspect correction is 2.76 arcsec
Star catalogs centered at 243.9165 , 14.3968 with radius 2.39 arc min.
n_usno: 64 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 2 matched entries is 0.384" for 1054681_g330
Mean and std. dev of mag. difference (MAG_DELTA) are 0.705 and 0.547 for 1054681_g330
Found 2 entries without IDs and 2 entries that are acceptable afterglow candidates for 1054681_g330.
Acceptable entries have no ID, XRT distances < 5.5", 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=243.9390 (16:15:45.36) DEC=14.3910 (+14:23:27.6)
XRT distances are from RA=243.9188 (16:15:40.52) DEC=14.3988 (+14:23:55.7)
*** WARNING 50 per cent of entries have no IDs.
-----------------
Entry 0 in the list of sources is a candidate afterglow for 1054681_g330 with genie
ra=243.91834 (16:15:40.40) dec=14.39913 (+14:23:56.9) +/- 0.7" mag=13.73+/-0.14
dist=2.1 REFID=2 major=1.0 minor=1.0 flag=0
Found 3 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
243.9183 14.3979 4.5 -1 USNO-B1 21.20 20.09 20.59
243.9216 14.3952 18.2 -1 USNO-B1 99.99 20.25 99.99
243.9189 14.4037 16.6 -1 USNO-B1 20.45 19.74 20.05
uvot_check_outside found 12 of 12 good pixels
##### This source remains a candidate #####
It has no entries within 3.5" or brighter than 12 mag
-----------------
Entry 3 in the list of sources is a candidate afterglow for 1054681_g330 with genie
ra=243.89727 (16:15:35.34) dec=14.38299 (+14:22:58.8) +/- 0.8" mag=19.14+/-0.18
dist=94.3 REFID=4 major=1.1 minor=0.8 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 148.4 arc sec from the BAT position.
This source is near the edge of image (0.927)
Found 1 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
243.8972 14.3824 2.0 -1 USNO-B1 17.39 16.82 17.08 *
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
243.9183 14.3979 3.8 -1 USNO-B1 21.20 20.09 20.59
The closest star is 3.79" away.
List UVOT sources within 10" of the XRT position:
Unmatched source ra=243.91834 (16:15:40.40) dec=14.39913 (+14:23:56.9) +/- 0.7" mag=13.73+/-0.14 dist=2.1 REFID=2 flag=0
There are 13184.224 counts in the bkg source region of 6197.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 2.128 counts/pixel (5-sig UL in 4" is 20.05 mag) for 1054681_g330
There are 9257.8369 counts in the src source region of 49.000000 pixels.
Rate in src region with 4 arcsec radius is 188.935 counts/pixel for 1054681_g330
There are 2837.6318 counts in the cand_src_bkg source region of 1244.0000 pixels.
Rate in cand_src_bkg region from 15 to 25 arcsec is 2.281 counts/pixel (5-sig UL in 4" is 20.02 mag) for 1054681_g330
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 20.61, XRT distances < 5.5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 1 good candidate(s) found.
Region file: 1054681_645047818_210611d04h13m34s723463usUT_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(243.9156,14.4018,45")
fk5;-circle(243.918339010327,14.3991307918904,6")
Region file: 1054681_645047818_210611d04h13m34s723463usUT_cand_src.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(243.918339010327,14.3991307918904,4")
Region file: 1054681_645047818_210611d04h13m34s723463usUT_cand_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(243.918339010327,14.3991307918904,25")
fk5;-circle(243.918339010327,14.3991307918904,15")
image paragraph message for exposure 2 of trigger 1054681
Catalogued source 3.8" from XRT position may affect AG photometry.
------ Start for Possible Stand-alone Circular ----
In response to GRB210610 (Swift/BAT trigger 1054681) at 19:51:27 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
303 seconds after the BAT trigger. There is a candidate afterglow in the
rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 16:15:40.40 = 243.91834
DEC(J2000) = +14:23:56.9 = 14.39913
with a 90%-confidence error radius of about 0.74 arc sec. This position is 2.1
arc sec. from the center of the XRT error circle. The estimated magnitude is
13.73 with a 1-sigma error of about 0.14. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.044.
------- notes for trigger 1054681 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 210611d04h13m38s676502usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1054681
-expid=645047818 -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/1054681/
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 645047818.40108 or about 2021:161:19:56:53 UT
Found 425 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 8% of the srclist region. Found 34 sources in
srclist catalog. Found 5 srclist source(s) without IDs. There are 1 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
18.12 mag.
Found 4 source(s) in Genie image catalog. 1 source(s) are within 10.0" of the
xrt position. Found 2 Genie image source(s) without IDs. There are 1 good
candidate(s) in the Genie image catalog. Good candidates must be brighter than
20.61 mag. Found 60 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 7% of the Genie image region.
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?
645047818 303 U 243.91836 14.39924 14.46/18.1 2.3 srclist Yes
645047818 303 U 243.91973 14.39910 19.59/18.1 3.3 srclist Yes
645047818 303 U 243.91834 14.39913 13.73/20.6 2.1 image Yes
List afterglow candidates for other finding charts.
645047606 91 WHITE 243.91843 14.39906 13.86/19.2 1.7 srclist Yes
645047606 91 WHITE 243.91836 14.39909 13.70/20.8 1.9 image Yes
645048373 858 WHITE 243.91843 14.39908 15.84/19.2 5.2 srclist Yes
645048373 858 WHITE 243.91834 14.39912 15.30/20.9 5.3 image Yes
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: 14.39913
GRB_ERROR: 0.74
GRB_RA: 243.91834
IMAGE_START_TIME: 19:56:53
MAGNITUDE: 13.73
MAG_ERROR: 0.14
MESSAGE_TYPE: ACK
SOURCE: XRT