image overlap message for exposure 1 of trigger 1220736
uvot_overlap.pl vrs. 2010-12-20b fem started at 240408d15h22m15s459335usUT
The observation of trigger 1220736 started 2024-04-08T15:16:49.1
Examining file 1220736_g174_uvot_sky_image.fits
The exposure ID is 734282209
The exposure time is 149.857 (seconds)
The filter is WHITE.
The uvot region is centered at (236.9892,-62.5692) with a roll angle of 134.8
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 (236.9470,-62.5340) with a radius of 3.000 arc min
This is 2.414 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 4.89 sq. arc min or 0.17 of the BAT error circle
The XRT error circle is centered at (236.9760,-62.5656) with a radius of 0.080 arc min
This is 0.425 arc min from the center of the uvot region
The area of the XRT error circle is 0.020 sq. arc min
The UVOT/XRT overlap is 0.020 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 1 of trigger 1220736
find_uvot_ag.pl vrs. 2023-04-25a fem started at 240408d15h22m16s376364usUT
Observation start time is 2024-04-08T15:16:49.1
Examining file 1220736_g174_uvot_catalog_image.fits
The exposure ID is 734282209
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 64 detected source(s) for 1220736_g174
Aspect correction adds 0.00136 degrees (0.327 sec of time = 2.26 arc sec) to RA
Aspect correction adds -0.00208 degrees (-7.48 arcsec) to Dec
Total aspect correction is 7.82 arcsec
Star catalogs centered at 236.9862 , -62.5677 with radius 2.76 arc min.
n_usno: 1362 n_gsc: 722
*** WARNING -- bright star catalog has 5 entries brighter than 12 mag
The brightest has mag 11.45292
RA DEC Mag Color
bright star 0: 236.98024 (15:47:55.26) -62.55726 (-62:33:26.2) 11.69 USNO-V
bright star 1: 237.00790 (15:48:01.90) -62.56121 (-62:33:40.4) 11.57 USNO-V
bright star 2: 237.00319 (15:48:00.77) -62.55029 (-62:33:01.0) 11.45 USNO-V
bright star 3: 237.00487 (15:48:01.17) -62.54923 (-62:32:57.2) 11.73 USNO-V
bright star 4: 237.01718 (15:48:04.12) -62.54043 (-62:32:25.5) 11.97 GSC-V
Mean distance difference (CAT_DELTA) for 68 matched entries is 1.224" for 1220736_g174
Mean and std. dev of mag. difference (MAG_DELTA) are 1.919 and 0.657 for 1220736_g174
Found 13 entries without IDs and 5 entries that are acceptable afterglow candidates for 1220736_g174.
Acceptable entries have no ID, XRT distances < 12", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
7 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=236.9470 (15:47:47.28) DEC=-62.5340 (-62:32:02.4)
XRT distances are from RA=236.9760 (15:47:54.24) DEC=-62.5656 (-62:33:56.2)
-----------------
Entry 20 in the list of sources is a candidate afterglow for 1220736_g174 with genie
ra=236.99810 (15:47:59.54) dec=-62.57165 (-62:34:17.9) +/- 0.6" mag=17.64+/-0.14
dist=42.6 REFID=37 major=1.0 minor=1.0 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 159.9 arc sec from the BAT position.
Found 32 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
236.9927 -62.5693 12.3 -1 USNO-B1 18.17 17.22 17.64
236.9935 -62.5705 8.7 -1 USNO-B1 19.01 17.63 18.24
236.9938 -62.5707 8.0 -1 USNO-B1 17.23 19.27 18.36
236.9940 -62.5719 6.8 -1 USNO-B1 15.36 16.56 16.03
236.9958 -62.5719 3.9 -1 USNO-B1 16.95 16.59 16.75
237.0005 -62.5664 19.3 -1 USNO-B1 16.90 16.69 16.78
236.9883 -62.5745 19.2 -1 USNO-B1 17.37 16.54 16.91
236.9990 -62.5721 2.3 -1 USNO-B1 15.48 14.20 14.77 *
236.9991 -62.5723 2.9 -1 USNO-B1 16.09 15.02 15.50 *
236.9907 -62.5750 17.2 -1 USNO-B1 16.23 15.18 15.64
236.9995 -62.5726 4.0 -1 USNO-B1 14.54 14.11 14.30
237.0001 -62.5724 4.2 -1 USNO-B1 15.51 14.05 14.70
236.9932 -62.5751 14.9 -1 USNO-B1 99.99 18.94 99.99
237.0013 -62.5727 6.5 -1 USNO-B1 17.19 13.85 15.33
237.0002 -62.5733 7.0 -1 USNO-B1 17.57 15.74 16.55
236.9954 -62.5752 13.5 -1 USNO-B1 19.28 19.65 19.49
237.0008 -62.5731 7.0 -1 USNO-B1 15.68 14.73 15.15
237.0053 -62.5707 12.4 -1 USNO-B1 16.32 15.67 15.96
237.0070 -62.5720 14.7 -1 USNO-B1 19.47 17.21 18.21
237.0065 -62.5733 15.2 -1 USNO-B1 21.86 23.62 22.84
237.0014 -62.5765 18.3 -1 USNO-B1 21.48 23.87 22.81
236.9924 -62.5694 12.5 -1 GSC2.3 17.48 19.30 99.99
236.9934 -62.5708 8.3 -1 GSC2.3 99.99 20.54 99.99
236.9946 -62.5720 5.9 -1 GSC2.3 17.71 19.05 99.99
237.0004 -62.5664 19.3 -1 GSC2.3 17.02 18.58 17.38
236.9877 -62.5744 20.0 -1 GSC2.3 18.04 18.72 99.99
236.9985 -62.5718 0.9 -1 GSC2.3 16.16 17.24 16.42 *
236.9908 -62.5750 17.1 -1 GSC2.3 15.60 17.70 16.38
236.9951 -62.5752 13.7 -1 GSC2.3 19.09 20.37 99.99
237.0004 -62.5733 7.0 -1 GSC2.3 15.56 16.59 16.27
237.0052 -62.5708 12.1 -1 GSC2.3 16.27 17.18 16.43
237.0085 -62.5722 17.3 -1 GSC2.3 20.33 99.99 99.99
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 3.5" or brighter than 12 mag
-----------------
Entry 21 in the list of sources is a candidate afterglow for 1220736_g174 with genie
ra=236.95026 (15:47:48.06) dec=-62.56386 (-62:33:49.9) +/- 0.6" mag=18.58+/-0.15
dist=43.1 REFID=27 major=1.8 minor=1.0 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 107.6 arc sec from the BAT position.
Found 35 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
236.9611 -62.5657 19.2 -1 USNO-B1 16.89 16.41 16.62
236.9605 -62.5657 18.1 -1 USNO-B1 17.51 15.98 16.66
236.9575 -62.5619 14.1 -1 USNO-B1 14.59 12.09 13.20
236.9537 -62.5651 7.1 -1 USNO-B1 17.43 17.69 17.57
236.9553 -62.5618 11.1 -1 USNO-B1 99.99 19.14 99.99
236.9523 -62.5645 4.1 -1 USNO-B1 18.13 16.25 17.08
236.9515 -62.5648 3.8 -1 USNO-B1 16.93 16.46 16.67
236.9556 -62.5592 18.9 -1 USNO-B1 14.66 16.06 15.44
236.9511 -62.5640 1.5 -1 USNO-B1 16.81 15.82 16.26 *
236.9483 -62.5667 10.7 -1 USNO-B1 17.60 16.79 17.15
236.9480 -62.5669 11.6 -1 USNO-B1 99.99 19.83 99.99
236.9475 -62.5671 12.6 -1 USNO-B1 16.93 16.26 16.56
236.9522 -62.5588 18.4 -1 USNO-B1 16.94 16.34 16.61
236.9465 -62.5686 18.3 -1 USNO-B1 17.91 17.29 17.57
236.9461 -62.5689 19.5 -1 USNO-B1 17.26 17.04 17.13
236.9459 -62.5633 7.5 -1 USNO-B1 19.21 18.82 18.99
236.9456 -62.5635 7.8 -1 USNO-B1 18.36 17.61 17.94
236.9453 -62.5637 8.3 -1 USNO-B1 17.87 18.59 18.27
236.9441 -62.5643 10.4 -1 USNO-B1 18.31 17.35 17.78
236.9470 -62.5597 15.8 -1 USNO-B1 19.72 21.93 20.95
236.9452 -62.5600 16.2 -1 USNO-B1 21.36 20.08 20.65
236.9411 -62.5608 18.8 -1 USNO-B1 99.99 17.35 99.99
236.9599 -62.5657 17.4 -1 GSC2.3 17.24 18.77 99.99
236.9597 -62.5658 17.2 -1 GSC2.3 17.25 18.93 99.99
236.9574 -62.5620 13.7 -1 GSC2.3 12.04 14.22 12.53
236.9540 -62.5651 7.6 -1 GSC2.3 18.60 20.15 99.99
236.9510 -62.5651 4.5 -1 GSC2.3 17.23 19.09 99.99
236.9507 -62.5640 0.8 -1 GSC2.3 16.59 18.63 17.49 *
236.9475 -62.5672 13.0 -1 GSC2.3 17.02 18.48 99.99
236.9519 -62.5593 16.7 -1 GSC2.3 99.99 19.76 99.99
236.9461 -62.5689 19.5 -1 GSC2.3 17.42 18.97 99.99
236.9456 -62.5633 7.9 -1 GSC2.3 19.36 20.26 99.99
236.9467 -62.5596 16.4 -1 GSC2.3 20.15 20.68 99.99
236.9434 -62.5643 11.4 -1 GSC2.3 17.54 19.45 99.99
236.9436 -62.5605 16.4 -1 GSC2.3 99.99 22.04 99.99
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 3.5" or brighter than 12 mag
-----------------
Entry 28 in the list of sources is a candidate afterglow for 1220736_g174 with genie
ra=236.97584 (15:47:54.20) dec=-62.55124 (-62:33:04.5) +/- 0.6" mag=18.39+/-0.15
dist=51.7 REFID=9 major=0.9 minor=0.9 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 78.4 arc sec from the BAT position.
Found 33 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
236.9797 -62.5564 19.6 -1 USNO-B1 17.56 11.57 14.23 *
236.9753 -62.5564 18.5 -1 USNO-B1 16.84 15.31 15.99
236.9805 -62.5546 14.3 -1 USNO-B1 18.54 16.97 17.67
236.9834 -62.5532 14.3 -1 USNO-B1 18.95 17.53 18.16
236.9797 -62.5533 9.8 -1 USNO-B1 17.14 16.17 16.60
236.9874 -62.5510 19.2 -1 USNO-B1 15.54 14.79 15.12
236.9736 -62.5519 4.4 -1 USNO-B1 17.05 17.15 17.11
236.9745 -62.5517 2.8 -1 USNO-B1 17.52 17.96 17.76 *
236.9825 -62.5508 11.1 -1 USNO-B1 17.94 18.17 18.07
236.9770 -62.5513 1.9 -1 USNO-B1 16.62 15.93 16.24 *
236.9819 -62.5508 10.2 -1 USNO-B1 18.06 17.96 18.00
236.9813 -62.5508 9.1 -1 USNO-B1 17.41 18.36 17.94
236.9792 -62.5503 6.5 -1 USNO-B1 18.99 23.45 21.47
236.9664 -62.5525 16.4 -1 USNO-B1 19.04 18.32 18.64
236.9691 -62.5514 11.2 -1 USNO-B1 19.25 17.57 18.32
236.9650 -62.5508 18.1 -1 USNO-B1 16.87 16.59 16.71
236.9656 -62.5504 17.3 -1 USNO-B1 17.82 17.61 17.70
236.9660 -62.5503 16.7 -1 USNO-B1 19.22 19.84 19.56
236.9835 -62.5475 18.5 -1 USNO-B1 18.06 18.31 18.20
236.9806 -62.5468 17.8 -1 USNO-B1 15.87 14.20 14.94
236.9756 -62.5457 19.8 -1 USNO-B1 20.71 20.52 20.60
236.9744 -62.5562 18.0 -1 GSC2.3 16.50 18.63 17.07
236.9807 -62.5544 13.8 -1 GSC2.3 99.99 21.34 99.99
236.9833 -62.5531 14.1 -1 GSC2.3 17.50 20.01 99.99
236.9875 -62.5510 19.3 -1 GSC2.3 15.15 16.27 15.68
236.9726 -62.5520 6.0 -1 GSC2.3 18.91 19.85 99.99
236.9818 -62.5509 9.9 -1 GSC2.3 18.15 19.31 99.99
236.9765 -62.5513 1.0 -1 GSC2.3 16.48 17.93 16.62 *
236.9661 -62.5527 17.1 -1 GSC2.3 19.13 20.44 99.99
236.9688 -62.5515 11.7 -1 GSC2.3 19.30 20.57 99.99
236.9646 -62.5507 18.7 -1 GSC2.3 17.18 18.57 99.99
236.9805 -62.5468 17.7 -1 GSC2.3 14.18 15.92 14.59
236.9753 -62.5457 19.9 -1 GSC2.3 20.34 21.43 99.99
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 3.5" or brighter than 12 mag
-----------------
Entry 30 in the list of sources is a candidate afterglow for 1220736_g174 with genie
ra=236.95101 (15:47:48.24) dec=-62.55523 (-62:33:18.8) +/- 0.6" mag=17.30+/-0.14
dist=55.8 REFID=13 major=1.0 minor=0.9 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 76.7 arc sec from the BAT position.
Found 28 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
236.9617 -62.5567 18.5 -1 USNO-B1 19.34 17.78 18.47
236.9618 -62.5559 18.1 -1 USNO-B1 19.47 19.74 19.62
236.9556 -62.5592 16.3 -1 USNO-B1 14.66 16.06 15.44
236.9540 -62.5580 11.2 -1 USNO-B1 15.17 12.91 13.91
236.9522 -62.5588 13.1 -1 USNO-B1 16.94 16.34 16.61
236.9470 -62.5597 17.6 -1 USNO-B1 19.72 21.93 20.95
236.9592 -62.5521 17.6 -1 USNO-B1 19.47 20.43 20.00
236.9523 -62.5552 2.1 -1 USNO-B1 16.21 15.36 15.74 *
236.9452 -62.5600 19.7 -1 USNO-B1 21.36 20.08 20.65
236.9581 -62.5517 17.2 -1 USNO-B1 19.24 20.06 19.70
236.9463 -62.5564 8.9 -1 USNO-B1 17.55 16.18 16.79
236.9446 -62.5572 12.9 -1 USNO-B1 18.87 18.30 18.55
236.9437 -62.5578 15.1 -1 USNO-B1 17.58 17.43 17.50
236.9434 -62.5581 16.3 -1 USNO-B1 16.60 17.84 17.29
236.9418 -62.5577 17.7 -1 USNO-B1 18.21 18.63 18.44
236.9508 -62.5515 13.5 -1 USNO-B1 22.57 22.96 22.79
236.9421 -62.5530 16.8 -1 USNO-B1 21.23 16.99 18.87
236.9617 -62.5577 19.8 -1 GSC2.3 19.19 20.95 99.99
236.9615 -62.5559 17.7 -1 GSC2.3 19.35 20.52 99.99
236.9540 -62.5578 10.5 -1 GSC2.3 13.09 14.92 13.86
236.9519 -62.5593 14.6 -1 GSC2.3 99.99 19.76 99.99
236.9594 -62.5522 17.6 -1 GSC2.3 20.05 20.36 99.99
236.9467 -62.5596 17.3 -1 GSC2.3 20.15 20.68 99.99
236.9519 -62.5551 1.6 -1 GSC2.3 16.00 17.19 16.14 *
236.9462 -62.5564 9.1 -1 GSC2.3 17.13 18.26 99.99
236.9433 -62.5579 16.0 -1 GSC2.3 18.95 19.97 99.99
236.9438 -62.5550 12.0 -1 GSC2.3 99.99 22.06 99.99
236.9412 -62.5522 19.6 -1 GSC2.3 16.72 17.43 17.30
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 3.5" or brighter than 12 mag
-----------------
Entry 63 in the list of sources is a candidate afterglow for 1220736_g174 with genie
ra=237.03131 (15:48:07.51) dec=-62.56861 (-62:34:07.0) +/- 0.6" mag=17.52+/-0.14
dist=92.4 REFID=35 major=1.0 minor=0.9 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 187.3 arc sec from the BAT position.
Found 31 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
237.0217 -62.5662 18.0 -1 USNO-B1 18.84 19.32 19.11
237.0227 -62.5664 16.3 -1 USNO-B1 18.66 23.82 21.53
237.0232 -62.5723 18.9 -1 USNO-B1 25.53 21.81 23.46
237.0233 -62.5727 19.9 -1 USNO-B1 24.83 50.00 99.99
237.0257 -62.5645 17.3 -1 USNO-B1 17.82 19.76 18.90
237.0260 -62.5709 12.2 -1 USNO-B1 22.61 17.21 19.61
237.0272 -62.5682 7.0 -1 USNO-B1 19.97 19.12 19.50
237.0267 -62.5732 18.1 -1 USNO-B1 22.32 23.69 23.08
237.0286 -62.5694 5.2 -1 USNO-B1 21.24 18.90 19.94
237.0300 -62.5667 7.2 -1 USNO-B1 17.02 16.46 16.71
237.0305 -62.5667 6.9 -1 USNO-B1 17.84 16.25 16.96
237.0312 -62.5660 9.4 -1 USNO-B1 99.99 19.94 99.99
237.0313 -62.5694 3.0 -1 USNO-B1 17.94 18.41 18.20 *
237.0316 -62.5698 4.3 -1 USNO-B1 99.99 16.04 99.99
237.0320 -62.5689 1.6 -1 USNO-B1 16.37 15.47 15.87 *
237.0317 -62.5706 7.3 -1 USNO-B1 19.42 20.14 19.82
237.0323 -62.5696 4.1 -1 USNO-B1 17.41 17.44 17.43
237.0335 -62.5666 8.0 -1 USNO-B1 16.95 16.66 16.79
237.0342 -62.5664 9.2 -1 USNO-B1 16.75 15.56 16.09
237.0345 -62.5659 11.2 -1 USNO-B1 99.99 17.62 99.99
237.0347 -62.5664 9.8 -1 USNO-B1 16.18 15.69 15.91
237.0384 -62.5724 18.0 -1 USNO-B1 15.45 13.70 14.47
237.0404 -62.5678 15.3 -1 USNO-B1 17.34 19.21 18.38
237.0212 -62.5661 19.0 -1 GSC2.3 17.70 19.52 99.99
237.0267 -62.5682 7.7 -1 GSC2.3 19.31 20.86 99.99
237.0270 -62.5697 8.1 -1 GSC2.3 99.99 21.99 99.99
237.0300 -62.5667 7.2 -1 GSC2.3 16.73 18.95 99.99
237.0321 -62.5687 1.4 -1 GSC2.3 15.99 16.81 16.30 *
237.0348 -62.5664 9.8 -1 GSC2.3 16.33 17.14 16.67
237.0386 -62.5725 18.5 -1 GSC2.3 13.88 15.44 14.36
237.0400 -62.5679 14.6 -1 GSC2.3 19.05 20.09 99.99
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 3.5" or brighter than 12 mag
Found 6 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
236.9782 -62.5674 7.3 -1 USNO-B1 15.25 14.10 14.61
236.9781 -62.5672 6.7 -1 USNO-B1 14.99 13.96 14.42
236.9778 -62.5669 5.6 -1 USNO-B1 15.46 14.23 14.78
236.9766 -62.5655 1.1 -1 USNO-B1 15.95 15.04 15.45
236.9783 -62.5674 7.4 -1 GSC2.3 14.72 15.27 15.12
236.9762 -62.5654 0.7 -1 GSC2.3 15.92 17.01 16.45
The closest star is 0.73" away.
List UVOT sources within 10" of the XRT position:
Matched source ra=236.97569 (15:47:54.16) dec=-62.56549 (-62:33:55.8) +/- 0.6" mag=17.51+/-0.14 dist=0.7 REFID=29 flag=3
Matched source ra=236.97779 (15:47:54.67) dec=-62.56728 (-62:34:02.2) +/- 0.6" mag=16.13+/-0.14 dist=6.7 REFID=30 flag=3
There are 62335.520 counts in the bkg source region of 4365.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 14.281 counts/pixel (5-sig UL in 4" is 19.91 mag) for 1220736_g174
There are 7229.9600 counts in the xrt source region of 198.00000 pixels.
Rate in xrt region with 8 arcsec radius is 36.515 counts/pixel for 1220736_g174
There are 14391.361 counts in the xrt_bkg source region of 1018.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 14.137 counts/pixel (5-sig UL in 4" is 19.91 mag) for 1220736_g174
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 20.46, XRT distances < 12",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 1220736_734282209_240408d15h22m16s376364usUT_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(236.9892,-62.5692,45")
fk5;-circle(236.975686460846,-62.5654881250756,6")
fk5;-circle(236.977785774673,-62.5672762215104,6")
fk5;-circle(236.968612111807,-62.5626677860308,6")
fk5;-circle(236.962446190405,-62.5658916176023,6")
fk5;-circle(236.989318437991,-62.5633435786056,6")
fk5;-circle(236.994719494054,-62.5642250636634,6")
fk5;-circle(236.979599748886,-62.5746709488123,6")
fk5;-circle(236.979367875802,-62.5570263596935,6")
fk5;-circle(236.968950289818,-62.575140049471,6")
fk5;-circle(236.977418354273,-62.5767958731123,6")
fk5;-circle(236.985286379913,-62.5760982809839,6")
fk5;-circle(236.990208892718,-62.5748159363449,6")
fk5;-circle(237.000276787855,-62.5661371897308,6")
fk5;-circle(236.998097691854,-62.5716494562759,6")
fk5;-circle(236.999224196033,-62.5732191353293,6")
fk5;-circle(236.998965819964,-62.5584876744198,6")
fk5;-circle(237.005883648112,-62.5658423462096,6")
fk5;-circle(236.982800562272,-62.5794094401814,6")
fk5;-circle(237.004561595111,-62.5705299740604,6")
fk5;-circle(237.007319264177,-62.5609797344695,6")
fk5;-circle(236.991980812771,-62.5817698079274,6")
Region file: 1220736_734282209_240408d15h22m16s376364usUT_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(236.9760,-62.5656,8")
Region file: 1220736_734282209_240408d15h22m16s376364usUT_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(236.9760,-62.5656,25")
fk5;-circle(236.9760,-62.5656,15")
fk5;-circle(236.968612111807,-62.5626677860308,6")
fk5;-circle(236.962446190405,-62.5658916176023,6")
fk5;-circle(236.989318437991,-62.5633435786056,6")
image paragraph message for exposure 1 of trigger 1220736
THIS MESSAGE IS *NOT* READY FOR DISTRIBUTION.
MORE ANALYSIS IS REQUIRED TO DETERMINE WHETHER THERE IS AN AFTERGLOW CANDIDATE.
IMAGE PROBLEM: high density of stars
SRCLIST PROBLEM: high density of stars, srclist filled telemetry buffer
See notes for more details.
2 source(s) near the XRT position were rejected as afterglow candidate(s). See
notes for details.
------ Start for Possible Stand-alone Circular ----
In response to GRB240408 (Swift/BAT trigger 1220736) at 15:13:54 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 141 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. Because of the density of catalogued stars, further
analysis is required to report an upper limit for any afterglow in the
sub-image. The 8'x8' region for the list of sources generated on-board covers
100% of the XRT error circle. Because of the density of catalogued stars,
further analysis is required to report an upper limit for any afterglow in the
region. No correction has been made for the expected extinction corresponding
to E(B-V) of 0.287.
------- notes for trigger 1220736 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 240408d15h22m18s572718usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1220736
-expid=734282209 -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/1220736/
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 734282209.11458 or about 2024:099:15:16:44 UT
Found 5000 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 110% of the srclist region. Found 190 sources
in srclist catalog. WARNING -- srclist catalog buffer filled. Found 17 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 64 source(s) in Genie image catalog. 2 source(s) are within 10.0" of the
xrt position. Found 13 Genie image source(s) without IDs. There are 0 good
candidate(s) in the Genie image catalog. Good candidates must be brighter than
20.46 mag. Found 1358 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 123% of the Genie image region.
Genie image analysis:
Found 62335.5 counts in the large background region of 4365.0 pixels or a rate
of 14.281 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 19.73 mag. for a
4-arcsec aperture.
Found 7230.0 counts in the XRT position region of 198.0 pixels or a rate of
36.515 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 29.539 +/- 0.588 (1-sigma) cps or
15.93 mag and a range from 15.91 to 15.95 mag. The 3-sigma UL at the XRT
position is 31.303 cps or 15.87 mag. The number of srclist sources filled the
available telemetry. The weakest source detected was 18.83 mag.
Found 2 srclist source(s) within 10.0" of the XRT position.
The brightest such source has ra= 236.9765 dec= -62.5657 mag=18.20 sep=0.93".
The closest srclist source has ra= 236.9765 dec= -62.5657 mag=18.20 sep=0.93".
Found 2 Genie source(s) within 10.0" of the XRT position. The brightest such
source has ra= 236.9757 dec= -62.5655 mag=17.51 sep=0.66". The closest Genie
source has ra= 236.9757 dec= -62.5655 mag=17.51 sep=0.66".
Report rejected UVOT sources within 10 arcsec XRT position.
Such sources are usually NOT the afterglow.
****THIS SOURCE NEAR XRT POSITION WAS REJECTED--USE WITH CAUTION****
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 141 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 15:47:54.17 = 236.97569
DEC(J2000) = -62:33:55.8 = -62.56549
with a 90%-confidence error radius of about 0.62 arc sec. This position is 0.66
arc sec. from the center of the XRT error circle. The estimated magnitude is
17.51 with a 1-sigma error of about 0.14. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.287.
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?
734282209 141 WHITE srclist found no candidates.
734282209 141 WHITE image found no candidates.
List afterglow candidates for other finding charts.
------- Tokens for Quick GCN -------