image overlap message for exposure 2 of trigger 1036139
uvot_overlap.pl vrs. 2010-12-20b fem started at 210308d16h45m24s502080usUT
The observation of trigger 1036139 started 2021-03-07T08:48:17.6
Examining file ./1036139_g338_uvot_sky_image.fits
The exposure ID is 636799697
The exposure time is 249.924 (seconds)
The filter is U.
The uvot region is centered at (119.2352,-66.9737) with a roll angle of 229.6
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 (119.1900,-66.9630) with a radius of 3.000 arc min
This is 1.240 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 7.15 sq. arc min or 0.25 of the BAT error circle
The XRT error circle is centered at (119.2383,-66.9709) with a radius of 0.025 arc min
This is 0.182 arc min from the center of the uvot region
The area of the XRT error circle is 0.002 sq. arc min
The UVOT/XRT overlap is 0.002 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 2 of trigger 1036139
find_uvot_ag.pl vrs. 2020-10-30 fem started at 210308d16h45m34s120069usUT
Observation start time is 2021-03-07T08:48:17.6
Examining file ./1036139_g338_uvot_catalog_image.fits
The exposure ID is 636799697
The exposure is 249.924 sec.
The bin size is 2 pixels
The filter is U
There are 17 detected source(s) for 1036139_g338
Aspect correction adds -0.00086 degrees (-0.207 sec of time = -1.21 arc sec) to RA
Aspect correction adds -0.00064 degrees (-2.29 arcsec) to Dec
Total aspect correction is 2.60 arcsec
Star catalogs centered at 119.2419 , -66.9723 with radius 2.60 arc min.
n_usno: 163 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 18 matched entries is 0.575" for 1036139_g338
Mean and std. dev of mag. difference (MAG_DELTA) are 1.404 and 1.067 for 1036139_g338
Found 1 entries without IDs and 1 entries that are acceptable afterglow candidates for 1036139_g338.
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=119.1900 (07:56:45.60) DEC=-66.9630 (-66:57:46.8)
XRT distances are from RA=119.2383 (07:56:57.19) DEC=-66.9709 (-66:58:15.3)
-----------------
Entry 16 in the list of sources is a candidate afterglow for 1036139_g338 with genie
ra=119.27862 (07:57:06.87) dec=-66.94987 (-66:56:59.5) +/- 0.6" mag=17.39+/-0.15
dist=94.7 REFID=2 major=1.8 minor=1.1 flag=16 (aperture_incomplete)
*** The position of this source is inconsistent with the XRT position.
The position is 133.5 arc sec from the BAT position.
This source is near the edge of image (1.000)
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
119.2821 -66.9530 12.2 -1 USNO-B1 20.12 19.85 19.97
119.2821 -66.9499 4.9 -1 USNO-B1 14.05 13.06 13.50 *
119.2825 -66.9476 9.7 -1 USNO-B1 19.84 20.17 20.02
119.2905 -66.9499 16.8 -1 USNO-B1 19.69 19.39 19.52
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 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are 11112.962 counts in the bkg source region of 5880.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 1.890 counts/pixel (5-sig UL in 4" is 20.12 mag) for 1036139_g338
There are 345.47284 counts in the xrt source region of 200.00000 pixels.
Rate in xrt region with 8 arcsec radius is 1.727 counts/pixel for 1036139_g338
There are 2152.4160 counts in the xrt_bkg source region of 1147.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 1.877 counts/pixel (5-sig UL in 4" is 20.12 mag) for 1036139_g338
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 20.67, 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: 1036139_636799697_210308d16h45m34s120069usUT_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(119.2352,-66.9737,45")
fk5;-circle(119.230335702978,-66.9666903525268,6")
fk5;-circle(119.245997259042,-66.9796869356065,6")
fk5;-circle(119.213938374813,-66.9764102250917,6")
fk5;-circle(119.207609944388,-66.9695170874885,6")
Region file: 1036139_636799697_210308d16h45m34s120069usUT_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(119.23829,-66.97092,8")
Region file: 1036139_636799697_210308d16h45m34s120069usUT_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(119.23829,-66.97092,25")
fk5;-circle(119.23829,-66.97092,15")
fk5;-circle(119.230335702978,-66.9666903525268,6")
image paragraph message for exposure 2 of trigger 1036139
------ Start for Possible Stand-alone Circular ----
In response to GRB210307 (Swift/BAT trigger 1036139) at 08:42:38 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
312 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 19.2 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 18.0 mag. No
correction has been made for the expected extinction corresponding to E(B-V) of
0.138.
------- notes for trigger 1036139 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 210308d16h45m37s962795usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1036139
-expid=636799697 -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/1036139/
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 636799697.57662 or about 2021:066:08:48:12 UT
Found 902 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 15% of the srclist region. Found 128 sources in
srclist catalog. Found 45 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
18.12 mag.
Found 17 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 20.67 mag. Found 159 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
16% of the Genie image region.
Genie image analysis:
Found 11113.0 counts in the large background region of 5880.0 pixels or a rate
of 1.890 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 19.97 mag. for a
4-arcsec aperture.
Found 345.5 counts in the XRT position region of 200.0 pixels or a rate of
1.728 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is -0.119 +/- 0.081 (1-sigma) cps. The
3-sigma UL at the XRT position is 0.243 cps or 19.73 mag. The closest srclist
source has ra= 119.2304 dec= -66.9668 mag=17.41 sep=18.46". The closest Genie
source has ra= 119.2303 dec= -66.9667 mag=16.76 sep=18.90".
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?
636799697 311 U srclist found no candidates.
636799697 311 U image found no candidates.
List afterglow candidates for other finding charts.
636799485 99 WHITE srclist found no candidates.
636799485 99 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: -66.97092
GRB_ERROR: 5
GRB_RA: 119.23829
IMAGE_START_TIME: 08:48:12
MAGNITUDE: 19.7
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT