image overlap message for exposure 3 of trigger 922968
uvot_overlap.pl vrs. 2010-12-20b fem started at 190830d08h45m36s854485usUT
The observation of trigger 922968 started 2019-08-29T20:11:38.3
Examining file ./922968_g893_uvot_sky_image.fits
The exposure ID is 588802298
The exposure time is 149.857 (seconds)
The filter is WHITE.
The uvot region is centered at (44.5485,-8.9562) with a roll angle of 83.8
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 (44.5400,-8.9680) with a radius of 3.000 arc min
This is 0.872 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 (44.5440,-8.9584) with a radius of 0.030 arc min
This is 0.297 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 922968
find_uvot_ag.pl vrs. 2017-02-17 fem started at 190830d08h46m00s390191usUT
Observation start time is 2019-08-29T20:11:38.3
Examining file ./922968_g893_uvot_catalog_image.fits
The exposure ID is 588802298
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 6 detected source(s) for 922968_g893
Aspect correction adds 0.00167 degrees (0.401 sec of time = 5.94 arc sec) to RA
Aspect correction adds -0.00051 degrees (-1.84 arcsec) to Dec
Total aspect correction is 6.22 arcsec
Star catalogs centered at 44.5524 , -8.9544 with radius 2.33 arc min.
n_usno: 41 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 7 matched entries is 0.596" for 922968_g893
Mean and std. dev of mag. difference (MAG_DELTA) are 0.578 and 0.981 for 922968_g893
Found 1 entries without IDs and 1 entries that are acceptable afterglow candidates for 922968_g893.
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=44.5400 (02:58:09.60) DEC=-8.9680 (-08:58:04.8)
XRT distances are from RA=44.5440 (02:58:10.57) DEC=-8.9584 (-08:57:30.1)
-----------------
Entry 0 in the list of sources is a candidate afterglow for 922968_g893 with genie
ra=44.54372 (02:58:10.49) dec=-8.95780 (-08:57:28.1) +/- 0.6" mag=17.34+/-0.14
dist=2.3 REFID=5 major=1.0 minor=1.0 flag=3 (neighbor+blended)
Found 9 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
44.5452 -8.9549 11.8 -1 USNO-B1 20.63 18.16 19.26
44.5429 -8.9553 9.3 -1 USNO-B1 16.15 13.73 14.80
44.5429 -8.9551 10.2 -1 USNO-B1 17.95 99.99 99.99
44.5427 -8.9538 15.0 -1 USNO-B1 18.69 17.13 17.82
44.5428 -8.9574 3.5 -1 USNO-B1 19.63 16.78 18.05 *
44.5424 -8.9531 17.7 -1 USNO-B1 18.91 16.41 17.52
44.5430 -8.9582 3.0 -1 USNO-B1 18.43 17.02 17.64 *
44.5431 -8.9588 4.3 -1 USNO-B1 99.99 17.70 99.99
44.5430 -8.9591 5.3 -1 USNO-B1 19.92 18.62 19.20
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 3.5" or brighter than 12 mag
Found 4 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
44.5428 -8.9574 5.5 -1 USNO-B1 19.63 16.78 18.05
44.5430 -8.9582 3.7 -1 USNO-B1 18.43 17.02 17.64
44.5431 -8.9588 3.8 -1 USNO-B1 99.99 17.70 99.99
44.5430 -8.9591 4.6 -1 USNO-B1 19.92 18.62 19.20
The closest star is 3.75" away.
List UVOT sources within 10" of the XRT position:
Unmatched source ra=44.54372 (02:58:10.49) dec=-8.95780 (-08:57:28.1) +/- 0.6" mag=17.34+/-0.14 dist=2.3 REFID=5 flag=3
There are 69589.375 counts in the bkg source region of 6099.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 11.410 counts/pixel (5-sig UL in 4" is 20.03 mag) for 922968_g893
There are 3833.8093 counts in the xrt source region of 199.00000 pixels.
Rate in xrt region with 8 arcsec radius is 19.265 counts/pixel for 922968_g893
There are 14029.394 counts in the xrt_bkg source region of 1224.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 11.462 counts/pixel (5-sig UL in 4" is 20.03 mag) for 922968_g893
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 20.58, 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: 922968_588802298_190830d08h46m00s390191usUT_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(44.5485,-8.9562,45")
fk5;-circle(44.5437212963452,-8.95780195722766,6")
fk5;-circle(44.5428346839099,-8.95539706777776,6")
Region file: 922968_588802298_190830d08h46m00s390191usUT_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(44.54404,-8.95836,8")
Region file: 922968_588802298_190830d08h46m00s390191usUT_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(44.54404,-8.95836,25")
fk5;-circle(44.54404,-8.95836,15")
fk5;-circle(44.5428346839099,-8.95539706777776,6")
image paragraph message for exposure 3 of trigger 922968
1 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 GRB190829 (Swift/BAT trigger 922968) at 19:56:44 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 870 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
0.05.
------- notes for trigger 922968 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 190830d08h46m05s687085usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=922968
-expid=588802298 -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/922968/
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 588802298.34648 or about 2019:241:20:11:33 UT
Found 379 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 4% of the srclist region. Found 47 sources in
srclist catalog. Found 8 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 6 source(s) in Genie image catalog. 1 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
20.58 mag. Found 37 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 69589.4 counts in the large background region of 6099.0 pixels or a rate
of 11.410 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 20.03 mag. for a
4-arcsec aperture.
Found 3833.8 counts in the XRT position region of 199.0 pixels or a rate of
19.265 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 10.353 +/- 0.432 (1-sigma) cps or
17.24 mag and a range from 17.20 to 17.29 mag. The 3-sigma UL at the XRT
position is 11.649 cps or 17.11 mag.
Found 5 srclist source(s) within 10.0" of the XRT position.
The brightest such source has ra= 44.5438 dec= -8.9581 mag=19.17 sep=1.20".
The closest srclist source has ra= 44.5438 dec= -8.9581 mag=19.17 sep=1.20".
Found 1 Genie source(s) within 10.0" of the XRT position. The brightest such
source has ra= 44.5437 dec= -8.9578 mag=17.34 sep=2.31". The closest Genie
source has ra= 44.5437 dec= -8.9578 mag=17.34 sep=2.31".
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 870 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 02:58:10.49 = 44.54372
DEC(J2000) = -08:57:28.1 = -8.95780
with a 90%-confidence error radius of about 0.62 arc sec. This position is 2.31
arc sec. from the center of the XRT error circle. The estimated magnitude is
17.34 with a 1-sigma error of about 0.14. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.05.
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?
588802298 869 WHITE 44.54425 -8.95792 19.51/19.2 1.7 srclist Yes
588802298 869 WHITE image found no candidates.
List afterglow candidates for other finding charts.
588801534 105 WHITE srclist found no candidates.
588801534 105 WHITE image found no candidates.
588801692 263 U srclist found no candidates.
588801692 263 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: -8.95836
GRB_ERROR: 5
GRB_RA: 44.54404
IMAGE_START_TIME: 20:11:33
MAGNITUDE: 17.1
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT