srclist overlap message for exposure 1 of trigger 903845
uvot_overlap.pl vrs. 2010-12-20b fem started at 190515d19h53m54s631973usUT
The observation of trigger 903845 started 2019-05-15T16:06:16.6
Examining file ./903845_g114_uvot_sky_srclist.fits
The exposure ID is 579629176
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (98.8422,52.3131) with a roll angle of 245.4
It is square with sides of 8.03 arc min. for an area of 64.51 sq arc min
The BAT error circle is centered at (98.8400,52.2950) with a radius of 3.000 arc min
This is 1.090 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 28.31 sq. arc min or 1.00 of the BAT error circle
The XRT error circle is centered at (98.8477,52.3166) with a radius of 0.038 arc min
This is 0.294 arc min from the center of the uvot region
The area of the XRT error circle is 0.005 sq. arc min
The UVOT/XRT overlap is 0.005 sq. arc min or 1.00 of the XRT error circle
srclist afterglow message for exposure 1 of trigger 903845
find_uvot_ag.pl vrs. 2017-02-17 fem started at 190515d19h53m57s751096usUT
Observation start time is 2019-05-15T16:06:16.6
Examining file ./903845_g114_uvot_catalog_srclist.fits
The exposure ID is 579629176
The exposure is 149.846 sec.
The bin size is 2 pixels
The filter is WHITE
There are 76 detected source(s) for 903845_g114
Aspect correction adds -0.00074 degrees (-0.177 sec of time = -1.62 arc sec) to RA
Aspect correction adds -0.00040 degrees (-1.44 arcsec) to Dec
Total aspect correction is 2.17 arcsec
Star catalogs centered at 98.8344 , 52.3066 with radius 5.86 arc min.
n_usno: 483 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 71 matched entries is 0.553" for 903845_g114
Mean and std. dev of mag. difference (MAG_DELTA) are 0.868 and 0.688 for 903845_g114
Found 8 entries without IDs and 7 entries that are acceptable afterglow candidates for 903845_g114.
Acceptable entries have no ID, XRT distances < 5.75", 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=98.8400 (06:35:21.60) DEC=52.2950 (+52:17:42.0)
XRT distances are from RA=98.8477 (06:35:23.45) DEC=52.3166 (+52:18:59.9)
-----------------
Entry 11 in the list of sources is a candidate afterglow for 903845_g114 with 3x3 stamp
ra=98.85219 (06:35:24.53) dec=52.29355 (+52:17:36.8) +/- 1.1" mag=19.87+/-0.35
dist=83.7 REFID=76
*** The position of this source is inconsistent with the XRT position.
The position is 27.3 arc sec from the BAT position.
src: 11 distr. of nearby unmatched sources: 0 0 1 0 0
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
98.8540 52.2940 4.4 -1 USNO-B1 21.84 20.36 21.02
98.8481 52.2898 16.3 -1 USNO-B1 16.78 15.84 16.26
98.8497 52.2892 16.6 -1 USNO-B1 17.74 16.97 17.31
98.8505 52.2889 17.2 -1 USNO-B1 18.29 17.04 17.59
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 14 in the list of sources is a candidate afterglow for 903845_g114 with 3x3 stamp
ra=98.85696 (06:35:25.67) dec=52.29282 (+52:17:34.2) +/- 1.1" mag=19.90+/-0.35
dist=88.1 REFID=71
*** The position of this source is inconsistent with the XRT position.
The position is 38.2 arc sec from the BAT position.
src: 14 distr. of nearby unmatched sources: 0 0 1 0 0
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
98.8540 52.2940 7.8 -1 USNO-B1 21.84 20.36 21.02
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 27 in the list of sources is a candidate afterglow for 903845_g114 with 3x3 stamp
ra=98.80929 (06:35:14.23) dec=52.34325 (+52:20:35.7) +/- 1.1" mag=19.81+/-0.35
dist=127.7 REFID=75
*** The position of this source is inconsistent with the XRT position.
The position is 186.4 arc sec from the BAT position.
src: 27 distr. of nearby unmatched sources: 0 0 0 0 0
Found 0 entries in star catalog(s) within 20.0" of the candidate.
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 34 in the list of sources is a candidate afterglow for 903845_g114 with 3x3 stamp
ra=98.91124 (06:35:38.70) dec=52.29968 (+52:17:58.9) +/- 1.1" mag=18.99+/-0.35
dist=152.6 REFID=57
*** The position of this source is inconsistent with the XRT position.
The position is 157.8 arc sec from the BAT position.
src: 34 distr. of nearby unmatched sources: 0 0 0 0 0
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
98.9106 52.2991 2.6 -1 USNO-B1 16.23 15.08 15.59 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 35 in the list of sources is a candidate afterglow for 903845_g114 with 3x3 stamp
ra=98.84890 (06:35:23.74) dec=52.27597 (+52:16:33.5) +/- 1.1" mag=19.60+/-0.35
dist=146.4 REFID=73
*** The position of this source is inconsistent with the XRT position.
The position is 71.3 arc sec from the BAT position.
src: 35 distr. of nearby unmatched sources: 0 0 0 0 0
Found 2 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
98.8544 52.2789 16.1 -1 USNO-B1 14.66 13.18 13.84
98.8532 52.2717 18.2 -1 USNO-B1 21.18 19.23 20.10
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 53 in the list of sources is a candidate afterglow for 903845_g114 with 3x3 stamp
ra=98.90873 (06:35:38.09) dec=52.27740 (+52:16:38.7) +/- 1.1" mag=19.70+/-0.35
dist=195.0 REFID=74
*** The position of this source is inconsistent with the XRT position.
The position is 164.1 arc sec from the BAT position.
src: 53 distr. of nearby unmatched sources: 0 0 0 0 0
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
98.9027 52.2802 16.6 -1 USNO-B1 99.99 20.43 99.99
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 72 in the list of sources is a candidate afterglow for 903845_g114 with 3x3 stamp
ra=98.78929 (06:35:09.43) dec=52.26139 (+52:15:41.0) +/- 1.1" mag=19.84+/-0.35
dist=236.9 REFID=70
*** The position of this source is inconsistent with the XRT position.
The position is 164.7 arc sec from the BAT position.
src: 72 distr. of nearby unmatched sources: 0 0 0 0 0
Found 0 entries in star catalog(s) within 20.0" of the candidate.
*** If XRT position is correct, then this is NOT the afterglow
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 19.22, XRT distances < 5.75",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
srclist paragraph message for exposure 1 of trigger 903845
------ Start for Possible Stand-alone Circular ----
In response to GRB190515 (Swift/BAT trigger 903845) at 16:04:21 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 92 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
0.09.
------- notes for trigger 903845 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 190515d19h54m03s578253usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=903845
-expid=579629176 -meonly -msg_srclist
Results from standard processing of UVOT TDRSS data for this trigger should be
available at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/903845/
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 579629176.62064 or about 2019:135:16:06:11 UT
Found 479 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 9% of the srclist region. Found 76 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. 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 20.23 mag. Found 87 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 9% of the
Genie image region. The Genie image is INCOMPLETE with 9993 null pixels.
Genie image analysis:
Found 95900.0 counts in the large background region of 4352.0 pixels or a rate
of 22.036 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 19.67 mag. for a
4-arcsec aperture.
Found 3870.9 counts in the XRT position region of 169.0 pixels or a rate of
22.905 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 0.929 +/- 0.461 (1-sigma) cps or
19.86 mag and a range from 19.42 to 20.60 mag. The 3-sigma UL at the XRT
position is 2.310 cps or 18.87 mag. The closest srclist source has ra= 98.8458
dec= 52.3137 mag=16.86 sep=11.25". The closest Genie source has ra= 98.8459
dec= 52.3139 mag=16.36 sep=10.83".
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?
579629176 91 WHITE srclist found no candidates.
579629176 91 WHITE image found no candidates.
List afterglow candidates for other finding charts.
579629389 304 U srclist found no candidates.
579629389 304 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 52.31664
GRB_ERROR: 5.75
GRB_RA: 98.84771
IMAGE_START_TIME: 16:06:11
MAGNITUDE: 18.9
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT