TDRSS lightcurve for Trigger=1336720
Notes:
- 1) None of the TDRSS light curves are background subtracted.
GCN BAT Position Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Fri 25 Jul 25 01:51:54 UT
NOTICE_TYPE: Swift-BAT GRB Position
TRIGGER_NUM: 1336720, Seg_Num: 0
GRB_RA: 35.385d {+02h 21m 32s} (J2000),
35.070d {+02h 20m 17s} (current),
36.048d {+02h 24m 12s} (1950)
GRB_DEC: -82.784d {-82d 47' 02"} (J2000),
-82.668d {-82d 40' 04"} (current),
-83.010d {-83d 00' 36"} (1950)
GRB_ERROR: 3.00 [arcmin radius, statistical only]
GRB_INTEN: 7021 [cnts] Image_Peak=1070 [image_cnts]
TRIGGER_DUR: 1.024 [sec]
TRIGGER_INDEX: 148 E_range: 25-100 keV
BKG_INTEN: 15540 [cnts]
BKG_TIME: 6683.97 SOD {01:51:23.97} UT
BKG_DUR: 8 [sec]
GRB_DATE: 20881 TJD; 206 DOY; 25/07/25
GRB_TIME: 6696.45 SOD {01:51:36.45} UT
GRB_PHI: -74.28 [deg]
GRB_THETA: 32.74 [deg]
SOLN_STATUS: 0x20000003
RATE_SIGNIF: 130.50 [sigma]
IMAGE_SIGNIF: 22.11 [sigma]
MERIT_PARAMS: +1 +0 +0 +0 +2 +7 +0 +0 +33 +0
SUN_POSTN: 124.67d {+08h 18m 41s} +19.62d {+19d 37' 15"}
SUN_DIST: 109.40 [deg] Sun_angle= 6.0 [hr] (West of Sun)
MOON_POSTN: 129.14d {+08h 36m 35s} +22.15d {+22d 08' 53"}
MOON_DIST: 112.48 [deg]
MOON_ILLUM: 0 [%]
GAL_COORDS: 299.61,-33.75 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 287.34,-69.91 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS: SWIFT-BAT GRB Coordinates.
COMMENTS: This is a rate trigger.
COMMENTS: A point_source was found.
COMMENTS: This does not match any source in the on-board catalog.
COMMENTS: This does not match any source in the ground catalog.
COMMENTS: This is a GRB.
COMMENTS: This trigger occurred at longitude,latitude = 318.72,7.65 [deg].
COMMENTS:
COMMENTS: NOTE: This BAT event is temporally(2.0<100sec) coincident with the FERMI_GBM event (trignum=775101099).
GCN BAT Lightcurve Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Fri 25 Jul 25 02:08:38 UT
NOTICE_TYPE: Swift-BAT GRB Lightcurve
TRIGGER_NUM: 1336720, Seg_Num: 0
GRB_RA: 35.385d {+02h 21m 32s} (J2000),
35.070d {+02h 20m 17s} (current),
36.048d {+02h 24m 12s} (1950)
GRB_DEC: -82.784d {-82d 47' 02"} (J2000),
-82.668d {-82d 40' 04"} (current),
-83.010d {-83d 00' 36"} (1950)
GRB_DATE: 20881 TJD; 206 DOY; 25/07/25
GRB_TIME: 6696.45 SOD {01:51:36.45} UT
TRIGGER_INDEX: 148
GRB_PHI: -74.28 [deg]
GRB_THETA: 32.74 [deg]
DELTA_TIME: 32.00 [sec]
TRIGGER_DUR: 1.024 [sec]
SOLN_STATUS: 0x3
RATE_SIGNIF: 130.50 [sigma]
IMAGE_SIGNIF: 22.11 [sigma]
LC_URL: sw01336720000msb.lc
GCN template for BAT paragraph
Click here!
At 01:51:36 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 250725 ***A*** (trigger=1336720). Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 35.385, -82.784 which is
RA(J2000) = 02h 21m 32s
Dec(J2000) = -82d 47' 02"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty). The BAT light curve showed a [**double-peaked**]
structure with a duration of about TTT sec. The peak count rate
was ~8718 counts/sec (15-350 keV), at ~0 sec after the trigger.
Test version of draft template
Initial TDRSS lightcurve and spacecraft attitude plot
TDRSS lightcurve from T0-30 to T0+50 (zoom in)
TDRSS light curve from T0-1 to T0+2 (More zoom in)
1.6s binned TDRSS light curve
Tilan's background subtracted TDRSS light curves
Extended TDRSS light curve and spacecraft attitude plot(s)
Extended TDRSS lc No.1
Extended TDRSS lc No.2
Extended TDRSS lc No.3
Extended TDRSS lc No.4
TDRSS extended lightcurve from T0-1 to T0+2
T50 and T90 calculation
******************************************
battblocks v1.18
------------------------------------------
Input Data: bat_raw_lc.fits
Output GTI: bb.gti
Events to Skip: 128 Changepoint log(prob) Prior: 6.000000
Internal Tick: 1.000000e-04 s
Lookback time: 0 s
Bkg. Subtract?: yes (for fluence/T50/T90 calculations)
------------------------------------------
Estimated T90 duration: 9.472 s +/- 0.202386 s
Estimated T50 duration: 3.072 s +/- 0.128 s
Estimated Peak Interval: MET 775101133.05599999 +/- 0.500000 s
Estimated background rate 1: 3787.132 near MET 775101119.680000 s
Estimated background rate 2: 3848.638 near MET 775101230.656000 s
Estimated total duration: 12.032 s (for data selection)
(from MET 775101130.560000 to MET 775101142.592000)
Estimated total fluence: 34066.777918 count
Created GTI with 18 entries
------------------------------------------
Search for this GRB position to the previously BAT detected GRB positions (search radius within 5 arcmin)
bat_grb_pos_cat.sh 35.385 -82.784 0.083
No match
Search for this GRB position to the source locations in BAT transient monitor (search radius within 12 arcmin)
python compare_catalog.py 35.385 -82.784
No match
Link to SIMBAD
Click here for the SIMBAD search!
Frank's UVOT result
Click here!
Frank's UVOT Blinking images
Click here!
Elevation angle of GRB/Sun at the ground telescope locations
GSFC, Greenbelt, Maryland
TimeUT Azimuth Elevation
Sun: 2025 7 25 2 132.418616 -15.615814
Obj: 2025 7 25 2 353.326715 -44.415233
the object visibility at GSFC, Greenbelt, Maryland
MMT Observatory, Mt. Hopkins, Arizona
TimeUT Azimuth Elevation
Sun: 2025 7 25 2 110.304211 4.498666
Obj: 2025 7 25 2 358.920079 -38.994015
the object visibility at MMT, Mt. Hopkins, Arizona
Hale Telescope, Palomar Mountain, California
TimeUT Azimuth Elevation
Sun: 2025 7 25 2 107.090231 9.811364
Obj: 2025 7 25 2 359.897337 -40.712556
the object visibility at Hale Telescope, Palomar Mt., California
Mauna Kea, Hawaii
TimeUT Azimuth Elevation
Sun: 2025 7 25 2 99.205079 40.865485
Obj: 2025 7 25 2 4.994674 -25.574139
the object visibility at Mauna Kea, Hawaii
Siding Spring Obs., Australia
TimeUT Azimuth Elevation
Sun: 2025 7 25 2 183.725165 38.973477
Obj: 2025 7 25 2 8.587275 31.411414
the object visibility at Siding Spring Obs., Australia
Tokyo, Japan
TimeUT Azimuth Elevation
Sun: 2025 7 25 2 305.208635 67.130619
Obj: 2025 7 25 2 8.092115 -31.648900
the object visibility at Tokyo, Japan
William Herschel Telescope, La Palma, Canary Islands, Spain
TimeUT Azimuth Elevation
Sun: 2025 7 25 2 192.424775 -40.698173
Obj: 2025 7 25 2 351.859851 -27.319709
the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain
Gemini South, Cerro Pachon, Chile
TimeUT Azimuth Elevation
Sun: 2025 7 25 2 84.911267 -49.752957
Obj: 2025 7 25 2 354.130381 25.124762
the object visibility at Gemini South, Cerro Pachon, Chile
The data/results are in /local/data/bat1/prebascript/trigger1336720/tdrss_ql/
bat_raw_lc.fits : TDRSS FITS light curve from GCN
gcn_position.txt : GCN BAT position notice
ratelc_tdrss.qdp : QDP file of the TDRSS light curve
tdrss_lc.gif : GIF TDRSS light curve
sc_att.qdp : QDP file of the spacecraft attitude
sc_att.gif : GIF spacecraft attitude
bb.gti : Bayesian block GTI file (battblocks)
dur.gti : Duration GTI file (battblocks)
battblocks.log : Output log of battblocks
Plot creation:
Thu Jul 24 22:09:22 EDT 2025