image overlap message for exposure 1 of trigger 1216804
uvot_overlap.pl vrs. 2010-12-20b fem started at 240223d01h14m42s955093usUT
The observation of trigger 1216804 started 2024-02-22T08:53:42.6
Examining file ./1216804_g130_uvot_sky_image.fits
The exposure ID is 730284822
The exposure time is 149.802 (seconds)
The filter is WHITE.
The uvot region is centered at (143.2484,-68.0346) with a roll angle of 191.9
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 (143.2480,-68.0290) with a radius of 3.000 arc min
This is 0.334 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 (143.2254,-68.0305) with a radius of 0.058 arc min
This is 0.571 arc min from the center of the uvot region
The area of the XRT error circle is 0.011 sq. arc min
The UVOT/XRT overlap is 0.011 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 1 of trigger 1216804
find_uvot_ag.pl vrs. 2023-04-25a fem started at 240223d01h14m46s313089usUT
Observation start time is 2024-02-22T08:53:42.6
Examining file ./1216804_g130_uvot_catalog_image.fits
The exposure ID is 730284822
The exposure is 149.802 sec.
The bin size is 2 pixels
The filter is WHITE
There are 19 detected source(s) for 1216804_g130
Aspect correction adds -0.00243 degrees (-0.583 sec of time = -3.27 arc sec) to RA
Aspect correction adds -0.00064 degrees (-2.29 arcsec) to Dec
Total aspect correction is 3.99 arcsec
Star catalogs centered at 143.2458 , -68.0333 with radius 2.46 arc min.
n_usno: 268 n_gsc: 260
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 24 matched entries is 0.876" for 1216804_g130
Mean and std. dev of mag. difference (MAG_DELTA) are 1.042 and 0.995 for 1216804_g130
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 1216804_g130.
Acceptable entries have no ID, XRT distances < 8.75", 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=143.2480 (09:32:59.52) DEC=-68.0290 (-68:01:44.4)
XRT distances are from RA=143.2254 (09:32:54.10) DEC=-68.0305 (-68:01:49.7)
Found 2 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
143.2191 -68.0304 8.5 -1 USNO-B1 20.14 18.56 19.26
143.2190 -68.0303 8.6 -1 GSC2.3 18.64 19.98 99.99
The closest star is 8.53" away.
List UVOT sources within 10" of the XRT position:
There are 47523.773 counts in the bkg source region of 5616.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 8.462 counts/pixel (5-sig UL in 4" is 20.19 mag) for 1216804_g130
There are 1560.3943 counts in the xrt source region of 200.00000 pixels.
Rate in xrt region with 8 arcsec radius is 7.802 counts/pixel for 1216804_g130
There are 9108.4668 counts in the xrt_bkg source region of 972.00000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 9.371 counts/pixel (5-sig UL in 4" is 20.13 mag) for 1216804_g130
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 20.74, XRT distances < 8.75",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 1216804_730284822_240223d01h14m46s313089usUT_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(143.2484,-68.0346,45")
fk5;-circle(143.245160432838,-68.0303051084573,6")
fk5;-circle(143.23735396172,-68.0260075876348,6")
fk5;-circle(143.26238256207,-68.0239516882321,6")
fk5;-circle(143.266501281715,-68.0339691824052,6")
fk5;-circle(143.21579957621,-68.0285653438105,6")
fk5;-circle(143.232850077985,-68.0397561091955,6")
fk5;-circle(143.214538980327,-68.0338788956068,6")
fk5;-circle(143.248116889856,-68.0435415841879,6")
Region file: 1216804_730284822_240223d01h14m46s313089usUT_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(143.22542,-68.03047,8")
Region file: 1216804_730284822_240223d01h14m46s313089usUT_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(143.22542,-68.03047,25")
fk5;-circle(143.22542,-68.03047,15")
fk5;-circle(143.245160432838,-68.0303051084573,6")
fk5;-circle(143.23735396172,-68.0260075876348,6")
fk5;-circle(143.224483988905,-68.0221656158352,6")
fk5;-circle(143.21579957621,-68.0285653438105,6")
fk5;-circle(143.214538980327,-68.0338788956068,6")
image paragraph message for exposure 1 of trigger 1216804
SRCLIST PROBLEM: srclist filled telemetry buffer
------ Start for Possible Stand-alone Circular ----
In response to GRB240222 (Swift/BAT trigger 1216804) at 08:51:31 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 98 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
0.166.
------- notes for trigger 1216804 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 240223d01h14m48s953465usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1216804
-expid=730284822 -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/1216804/
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 730284822.61934 or about 2024:053:08:53:37 UT
Found 1684 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 31% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 78 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 19 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 20.74 mag. Found 264 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
30% of the Genie image region.
Genie image analysis:
Found 47523.8 counts in the large background region of 5616.0 pixels or a rate
of 8.462 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 20.02 mag. for a
4-arcsec aperture.
Found 1560.4 counts in the XRT position region of 200.0 pixels or a rate of
7.802 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is -2.092 +/- 0.294 (1-sigma) cps. The
3-sigma UL at the XRT position is 0.882 cps or 19.74 mag. The number of srclist
sources filled the available telemetry. The weakest source detected was 19.51
mag. The closest srclist source has ra= 143.2166 dec= -68.0300 mag=18.70
sep=11.94". The closest Genie source has ra= 143.2158 dec= -68.0286 mag=16.53
sep=14.66".
This paragraph is only useful if the XRT position is grossly wrong. There are 4
candidate(s) in the srclist data with mag < 18.66 inside the BAT error region,
but outside the XRT error region. The brightest such source is at RA=143.24171
(09:32:58.01), DEC=-68.01795 (-68:01:04.6) (J2000). It has a mag of 16.79. It
is 40.7" from the BAT position.
****THIS SOURCE IS OUTSIDE XRT ERROR CIRCLE--USE WITH CAUTION***
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 98 seconds after the BAT trigger. There is a candidate afterglow in
the list of sources generated on-board at
RA(J2000) = 09:32:58.01 = 143.24171
DEC(J2000) = -68:01:04.6 = -68.01795
with a 90%-confidence error radius of about 1.10 arc sec. The estimated
magnitude is 16.79 with a 1-sigma error of about 0.35. No correction has been
made for the expected extinction corresponding to E(B-V) of 0.166.
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?
730284822 97 WHITE srclist found no candidates.
730284822 97 WHITE image found no candidates.
List afterglow candidates for other finding charts.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: -68.03047
GRB_ERROR: 8.75
GRB_RA: 143.22542
IMAGE_START_TIME: 08:53:37
MAGNITUDE: 19.7
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT