image overlap message for exposure 3 of trigger 1069788
uvot_overlap.pl vrs. 2010-12-20b fem started at 210822d17h10m59s107545usUT
The observation of trigger 1069788 started 2021-08-22T09:33:21.0
Examining file ./1069788_g902_uvot_sky_image.fits
The exposure ID is 651317601
The exposure time is 149.868 (seconds)
The filter is WHITE.
The uvot region is centered at (304.4330,5.2816) with a roll angle of 302.1
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 (304.4760,5.2650) with a radius of 3.000 arc min
This is 2.756 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 3.81 sq. arc min or 0.13 of the BAT error circle
The XRT error circle is centered at (304.4375,5.2835) with a radius of 0.033 arc min
This is 0.293 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 3 of trigger 1069788
find_uvot_ag.pl vrs. 2020-10-30 fem started at 210822d17h11m19s892826usUT
Observation start time is 2021-08-22T09:33:21.0
Examining file ./1069788_g902_uvot_catalog_image.fits
The exposure ID is 651317601
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 40 detected source(s) for 1069788_g902
Aspect correction adds 0.00055 degrees (0.131 sec of time = 1.96 arc sec) to RA
Aspect correction adds 0.00165 degrees ( 5.94 arcsec) to Dec
Total aspect correction is 6.26 arcsec
Star catalogs centered at 304.4347 , 5.2791 with radius 2.72 arc min.
n_usno: 241 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 38 matched entries is 0.392" for 1069788_g902
Mean and std. dev of mag. difference (MAG_DELTA) are 1.085 and 0.299 for 1069788_g902
Found 2 entries without IDs and 2 entries that are acceptable afterglow candidates for 1069788_g902.
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=304.4760 (20:17:54.24) DEC= 5.2650 (+05:15:54.0)
XRT distances are from RA=304.4375 (20:17:45.01) DEC= 5.2835 (+05:17:00.6)
-----------------
Entry 2 in the list of sources is a candidate afterglow for 1069788_g902 with genie
ra=304.43747 (20:17:44.99) dec=5.28332 (+05:16:60.0) +/- 0.6" mag=15.38+/-0.14
dist=0.7 REFID=20 major=1.0 minor=1.0 flag=0
Found 6 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
304.4387 5.2784 18.2 -1 USNO-B1 19.95 19.21 19.54
304.4352 5.2846 9.2 -1 USNO-B1 20.05 18.44 19.16
304.4348 5.2851 11.6 -1 USNO-B1 99.99 19.30 99.99
304.4394 5.2831 7.1 -1 USNO-B1 18.02 16.98 17.45
304.4421 5.2821 17.3 -1 USNO-B1 17.62 16.91 17.22
304.4388 5.2863 11.7 -1 USNO-B1 19.77 18.71 19.18
uvot_check_outside found 13 of 13 good pixels
##### This source remains a candidate #####
It has no entries within 3.5" or brighter than 12 mag
-----------------
Entry 31 in the list of sources is a candidate afterglow for 1069788_g902 with genie
ra=304.43016 (20:17:43.24) dec=5.25580 (+05:15:20.9) +/- 0.7" mag=20.24+/-0.20
dist=103.2 REFID=1 major=0.7 minor=0.3 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 167.6 arc sec from the BAT position.
This source is near the edge of image (0.962)
Found 6 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
304.4317 5.2588 12.3 -1 USNO-B1 19.61 18.69 19.10
304.4349 5.2583 19.1 -1 USNO-B1 21.02 19.23 20.02
304.4285 5.2564 6.3 -1 USNO-B1 20.67 19.01 19.75
304.4305 5.2550 3.1 -1 USNO-B1 16.90 16.00 16.39 *
304.4322 5.2541 9.6 -1 USNO-B1 19.66 18.94 19.26
304.4254 5.2535 19.1 -1 USNO-B1 20.95 19.79 20.31
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
304.4352 5.2846 9.2 -1 USNO-B1 20.05 18.44 19.16
304.4394 5.2831 7.0 -1 USNO-B1 18.02 16.98 17.45
The closest star is 6.98" away.
List UVOT sources within 10" of the XRT position:
Unmatched source ra=304.43747 (20:17:44.99) dec=5.28332 (+05:16:60.0) +/- 0.6" mag=15.38+/-0.14 dist=0.7 REFID=20 flag=0
There are 48477.180 counts in the bkg source region of 5199.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 9.324 counts/pixel (5-sig UL in 4" is 20.14 mag) for 1069788_g902
There are 7038.9194 counts in the src source region of 50.000000 pixels.
Rate in src region with 4 arcsec radius is 140.778 counts/pixel for 1069788_g902
There are 8936.7070 counts in the cand_src_bkg source region of 929.00000 pixels.
Rate in cand_src_bkg region from 15 to 25 arcsec is 9.620 counts/pixel (5-sig UL in 4" is 20.12 mag) for 1069788_g902
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 20.69, XRT distances < 5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 1 good candidate(s) found.
Region file: 1069788_651317601_210822d17h11m19s892826usUT_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(304.4330,5.2816,45")
fk5;-circle(304.43876404684,5.27872754912425,6")
fk5;-circle(304.440969587098,5.27632820972759,6")
fk5;-circle(304.437465122852,5.28332409116054,6")
fk5;-circle(304.442430473394,5.27876264059171,6")
fk5;-circle(304.433517368929,5.27731877076854,6")
fk5;-circle(304.442124218516,5.28205334129672,6")
fk5;-circle(304.43878371771,5.28637138790152,6")
fk5;-circle(304.430597557527,5.27818826860269,6")
fk5;-circle(304.438828540517,5.26879226225547,6")
fk5;-circle(304.428643325465,5.28479844993755,6")
fk5;-circle(304.426521152667,5.29066829233293,6")
fk5;-circle(304.427617364762,5.29426905530819,6")
Region file: 1069788_651317601_210822d17h11m19s892826usUT_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(304.437465122852,5.28332409116054,4")
Region file: 1069788_651317601_210822d17h11m19s892826usUT_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(304.437465122852,5.28332409116054,25")
fk5;-circle(304.437465122852,5.28332409116054,15")
fk5;-circle(304.43876404684,5.27872754912425,6")
fk5;-circle(304.440969587098,5.27632820972759,6")
fk5;-circle(304.442430473394,5.27876264059171,6")
fk5;-circle(304.433517368929,5.27731877076854,6")
fk5;-circle(304.442124218516,5.28205334129672,6")
fk5;-circle(304.43878371771,5.28637138790152,6")
fk5;-circle(304.430597557527,5.27818826860269,6")
image paragraph message for exposure 3 of trigger 1069788
------ Start for Possible Stand-alone Circular ----
In response to GRB210822 (Swift/BAT trigger 1069788) at 09:18:18 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 875 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 20:17:44.99 = 304.43747
DEC(J2000) = +05:16:60.0 = 5.28332
with a 90%-confidence error radius of about 0.61 arc sec. This position is 0.7
arc sec. from the center of the XRT error circle. The estimated magnitude is
15.38 with a 1-sigma error of about 0.14. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.162.
------- notes for trigger 1069788 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 210822d17h11m23s890878usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1069788
-expid=651317601 -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/1069788/
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 651317601.0479 or about 2021:234:09:33:16 UT
Found 2066 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 20% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 6 srclist
source(s) without IDs. There are 1 good candidate(s) in the srclist catalog.
Good candidates must be brighter than 19.22 mag.
Found 40 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
20.69 mag. Found 237 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 22% 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?
651317601 875 WHITE 304.43766 5.28323 16.42/19.2 1.1 srclist Yes
651317601 875 WHITE 304.43747 5.28332 15.38/20.7 0.7 image Yes
List afterglow candidates for other finding charts.
651316811 85 WHITE 304.43725 5.28292 14.79/19.2 2.3 srclist Yes
651316811 85 WHITE 304.43750 5.28332 13.70/20.6 0.6 image Yes
651317023 297 U 304.43755 5.28334 14.60/18.1 0.6 srclist Yes
651317023 297 U 304.43838 5.28426 19.17/18.1 4.1 srclist Yes
651317023 297 U 304.43740 5.28329 13.66/20.4 0.9 image Yes
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 5.28332
GRB_ERROR: 0.61
GRB_RA: 304.43747
IMAGE_START_TIME: 09:33:16
MAGNITUDE: 15.38
MAG_ERROR: 0.14
MESSAGE_TYPE: ACK
SOURCE: XRT