image overlap message for exposure 2 of trigger 1034325
uvot_overlap.pl vrs. 2010-12-20b fem started at 210223d19h23m51s936209usUT
The observation of trigger 1034325 started 2021-02-22T22:42:11.4
Examining file ./1034325_g284_uvot_sky_image.fits
The exposure ID is 635726531
The exposure time is 249.935 (seconds)
The filter is U.
The uvot region is centered at (154.6212,-14.9027) with a roll angle of 184.2
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 (154.6210,-14.8980) with a radius of 3.000 arc min
This is 0.283 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 (154.6058,-14.9317) with a radius of 0.023 arc min
This is 1.957 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 0.000 sq. arc min or 0.00 of the XRT error circle
image afterglow message for exposure 2 of trigger 1034325
find_uvot_ag.pl vrs. 2020-10-30 fem started at 210223d19h24m01s594691usUT
Observation start time is 2021-02-22T22:42:11.4
Examining file ./1034325_g284_uvot_catalog_image.fits
The exposure ID is 635726531
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is U
There are 6 detected source(s) for 1034325_g284
Aspect correction adds -0.00087 degrees (-0.209 sec of time = -3.03 arc sec) to RA
Aspect correction adds -0.00096 degrees (-3.44 arcsec) to Dec
Total aspect correction is 4.59 arcsec
Star catalogs centered at 154.6244 , -14.9007 with radius 2.47 arc min.
n_usno: 67 n_gsc: 0
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 10.94266
RA DEC Mag Color
bright star 0: 154.63921 (10:18:33.41) -14.92453 (-14:55:28.3) 10.94 USNO-V
Mean distance difference (CAT_DELTA) for 5 matched entries is 0.256" for 1034325_g284
Mean and std. dev of mag. difference (MAG_DELTA) are 1.428 and 0.895 for 1034325_g284
Found 1 entries without IDs and 0 entries that are acceptable afterglow candidates for 1034325_g284.
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.
1 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=154.6210 (10:18:29.04) DEC=-14.8980 (-14:53:52.8)
XRT distances are from RA=154.6058 (10:18:25.38) DEC=-14.9317 (-14:55:54.1)
Found NO acceptable entries.
Unidentified entry closest to XRT position is no. 5:
ra=154.63476 dec=-14.92169 +/- 0.7" mag=19.25+/-0.19 dist=107.1 REFID=2 flag=0
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are 14066.090 counts in the bkg source region of 6293.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 2.235 counts/pixel (5-sig UL in 4" is 20.03 mag) for 1034325_g284
Do not compute counts in XRT region because position is too far from center.
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: 1034325_635726531_210223d19h24m01s594691usUT_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(154.6212,-14.9027,45")
fk5;-circle(154.624970828714,-14.8897258278391,6")
image paragraph message for exposure 2 of trigger 1034325
------ Start for Possible Stand-alone Circular ----
In response to GRB210222 (Swift/BAT trigger 1034325) at 22:37:26 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
258 seconds after the BAT trigger. There is a candidate afterglow in the list
of sources generated on-board at
RA(J2000) = 10:18:25.48 = 154.60617
DEC(J2000) = -14:55:54.2 = -14.93171
with a 90%-confidence error radius of about 1.10 arc sec. This position is 1.5
arc sec. from the center of the XRT error circle. The estimated magnitude is
17.64. No correction has been made for the expected extinction corresponding to
E(B-V) of 0.102.
------- notes for trigger 1034325 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 210223d19h24m04s588951usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1034325
-expid=635726531 -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/1034325/
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 635726531.40162 or about 2021:053:22:42:06 UT
Found 706 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 6% of the srclist region. Found 187 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 119 srclist
source(s) without IDs. There are 1 good candidate(s) in the srclist catalog.
Good candidates must be brighter than 18.12 mag.
Found 6 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 20.58 mag. Found 63 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 7% of the
Genie image region. The closest Genie source has ra= 154.6076 dec= -14.9190
mag=19.02 sep=46.01".
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?
635726531 258 U 154.60617 -14.93171 17.64/18.1 1.5 srclist Yes
635726531 258 U image found no candidates.
List afterglow candidates for other finding charts.
635726373 100 WHITE 154.60606 -14.93215 17.65/19.2 2.0 srclist Yes
635726373 100 WHITE image found no candidates.
635727134 861 WHITE 154.60590 -14.93200 18.40/19.2 2.1 srclist Yes
635727134 861 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: u
GRB_DEC: -14.93171
GRB_ERROR: 1.10
GRB_RA: 154.60617
IMAGE_START_TIME: 22:42:06
MAGNITUDE: 17.64
MAG_ERROR: 0.4
MESSAGE_TYPE: ACK
SOURCE: XRT