image overlap message for exposure 2 of trigger 904394
uvot_overlap.pl vrs. 2010-12-20b fem started at 190519d16h46m09s670192usUT
The observation of trigger 904394 started 2019-05-19T07:40:16.2
Examining file ./904394_g876_uvot_sky_image.fits
The exposure ID is 579944416
The exposure time is 149.879 (seconds)
The filter is U.
The uvot region is centered at (114.7622,-38.8027) with a roll angle of 305.1
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 (114.7640,-38.8240) with a radius of 3.000 arc min
This is 1.279 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 (114.7676,-38.8054) with a radius of 0.027 arc min
This is 0.299 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 904394
find_uvot_ag.pl vrs. 2017-02-17 fem started at 190519d16h46m21s750009usUT
Observation start time is 2019-05-19T07:40:16.2
Examining file ./904394_g876_uvot_catalog_image.fits
The exposure ID is 579944416
The exposure is 149.879 sec.
The bin size is 2 pixels
The filter is U
There are 13 detected source(s) for 904394_g876
Aspect correction adds -0.00093 degrees (-0.223 sec of time = -2.61 arc sec) to RA
Aspect correction adds 0.00060 degrees ( 2.17 arcsec) to Dec
Total aspect correction is 3.39 arcsec
Star catalogs centered at 114.7632 , -38.8016 with radius 2.39 arc min.
n_usno: 242 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 13 matched entries is 0.641" for 904394_g876
Mean and std. dev of mag. difference (MAG_DELTA) are 1.710 and 0.494 for 904394_g876
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 904394_g876.
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=114.7640 (07:39:03.36) DEC=-38.8240 (-38:49:26.4)
XRT distances are from RA=114.7676 (07:39:04.22) DEC=-38.8054 (-38:48:19.4)
Found 3 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
114.7648 -38.8039 9.4 -1 USNO-B1 20.67 18.49 19.46
114.7682 -38.8051 2.1 -1 USNO-B1 19.04 18.00 18.46
114.7703 -38.8061 8.2 -1 USNO-B1 18.51 16.72 17.51
The closest star is 2.10" away.
List UVOT sources within 10" of the XRT position:
There are 18101.898 counts in the bkg source region of 5800.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 3.121 counts/pixel (5-sig UL in 4" is 19.29 mag) for 904394_g876
There are 649.92603 counts in the xrt source region of 202.00000 pixels.
Rate in xrt region with 8 arcsec radius is 3.217 counts/pixel for 904394_g876
There are 3747.7478 counts in the xrt_bkg source region of 1187.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 3.157 counts/pixel (5-sig UL in 4" is 19.29 mag) for 904394_g876
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 19.85, 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: 904394_579944416_190519d16h46m21s750009usUT_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(114.7622,-38.8027,45")
fk5;-circle(114.766959271105,-38.7986684502124,6")
fk5;-circle(114.763201536471,-38.795657199428,6")
fk5;-circle(114.752613463956,-38.8019814216968,6")
fk5;-circle(114.748434597321,-38.8033027164214,6")
fk5;-circle(114.751978603594,-38.7932709893128,6")
Region file: 904394_579944416_190519d16h46m21s750009usUT_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(114.76758,-38.80539,8")
Region file: 904394_579944416_190519d16h46m21s750009usUT_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(114.76758,-38.80539,25")
fk5;-circle(114.76758,-38.80539,15")
fk5;-circle(114.766959271105,-38.7986684502124,6")
image paragraph message for exposure 2 of trigger 904394
SRCLIST PROBLEM: srclist filled telemetry buffer
------ Start for Possible Stand-alone Circular ----
In response to GRB190519 (Swift/BAT trigger 904394) at 07:25:39 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the U filter starting
853 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
0.42.
------- notes for trigger 904394 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 190519d16h46m25s640279usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=904394
-expid=579944416 -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/904394/
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 579944416.22818 or about 2019:139:07:40:11 UT
Found 3485 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 32% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 98 srclist
source(s) without IDs. There are 0 good candidate(s) in the srclist catalog.
Good candidates must be brighter than 17.84 mag.
Found 13 source(s) in Genie image catalog. Found 0 Genie image source(s)
without IDs. There are 0 good candidate(s) in the Genie image catalog. Good
candidates must be brighter than 19.85 mag. Found 238 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
28% of the Genie image region.
Genie image analysis:
Found 18101.9 counts in the large background region of 5800.0 pixels or a rate
of 3.121 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 19.33 mag. for a
4-arcsec aperture.
Found 649.9 counts in the XRT position region of 202.0 pixels or a rate of
3.217 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 0.081 +/- 0.184 (1-sigma) cps or
21.11 mag and a range from 19.82 to 99.99 mag. The 3-sigma UL at the XRT
position is 0.632 cps or 18.88 mag. The number of srclist sources filled the
available telemetry. The weakest source detected was 18.41 mag. The closest
srclist source has ra= 114.7914 dec= -38.8079 mag=17.47 sep=67.47". The closest
Genie source has ra= 114.7670 dec= -38.7987 mag=17.47 sep=24.26".
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?
579944416 853 U srclist found no candidates.
579944416 853 U image found no candidates.
List afterglow candidates for other finding charts.
579943712 149 ? srclist data are not available.
579943712 149 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: -38.80539
GRB_ERROR: 5
GRB_RA: 114.76758
IMAGE_START_TIME: 07:40:11
MAGNITUDE: 18.9
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT