TDRSS lightcurve for Trigger=1404295
Notes:
- 1) None of the TDRSS light curves are background subtracted.
GCN BAT Position Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Wed 15 Oct 25 14:17:36 UT
NOTICE_TYPE: Swift-BAT GRB Position
TRIGGER_NUM: 1404295, Seg_Num: 0
GRB_RA: 245.007d {+16h 20m 02s} (J2000),
245.523d {+16h 22m 05s} (current),
244.010d {+16h 16m 02s} (1950)
GRB_DEC: -54.853d {-54d 51' 10"} (J2000),
-54.913d {-54d 54' 46"} (current),
-54.733d {-54d 43' 58"} (1950)
GRB_ERROR: 3.00 [arcmin radius, statistical only]
GRB_INTEN: 1375 [cnts] Image_Peak=78 [image_cnts]
TRIGGER_DUR: 1.024 [sec]
TRIGGER_INDEX: 136 E_range: 15-25 keV
BKG_INTEN: 10637 [cnts]
BKG_TIME: 51427.49 SOD {14:17:07.49} UT
BKG_DUR: 8 [sec]
GRB_DATE: 20963 TJD; 288 DOY; 25/10/15
GRB_TIME: 51443.81 SOD {14:17:23.81} UT
GRB_PHI: -5.35 [deg]
GRB_THETA: 43.17 [deg]
SOLN_STATUS: 0x83
RATE_SIGNIF: 12.80 [sigma]
IMAGE_SIGNIF: 6.53 [sigma]
MERIT_PARAMS: +1 +0 +0 +0 +0 -4 +0 +1 -53 +0
SUN_POSTN: 200.79d {+13h 23m 10s} -8.75d {-08d 44' 47"}
SUN_DIST: 58.13 [deg] Sun_angle= -3.0 [hr] (East of Sun)
MOON_POSTN: 138.54d {+09h 14m 10s} +19.06d {+19d 03' 18"}
MOON_DIST: 115.20 [deg]
MOON_ILLUM: 31 [%]
GAL_COORDS: 330.02, -3.35 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 253.17,-32.86 [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: Since the IMAGE_SIGNIF is less than 7 sigma, this is a questionable detection.
COMMENTS: This trigger occurred at longitude,latitude = 331.92,-9.99 [deg].
GCN BAT Lightcurve Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Wed 15 Oct 25 14:32:32 UT
NOTICE_TYPE: Swift-BAT GRB Lightcurve
TRIGGER_NUM: 1404295, Seg_Num: 0
GRB_RA: 245.007d {+16h 20m 02s} (J2000),
245.523d {+16h 22m 05s} (current),
244.010d {+16h 16m 02s} (1950)
GRB_DEC: -54.853d {-54d 51' 10"} (J2000),
-54.913d {-54d 54' 46"} (current),
-54.733d {-54d 43' 58"} (1950)
GRB_DATE: 20963 TJD; 288 DOY; 25/10/15
GRB_TIME: 51443.81 SOD {14:17:23.81} UT
TRIGGER_INDEX: 136
GRB_PHI: -5.35 [deg]
GRB_THETA: 43.17 [deg]
DELTA_TIME: -31.00 [sec]
TRIGGER_DUR: 1.024 [sec]
SOLN_STATUS: 0x83
RATE_SIGNIF: 12.80 [sigma]
IMAGE_SIGNIF: 6.53 [sigma]
LC_URL: sw01404295000msb.lc
GCN template for BAT paragraph
Click here!
At 14:17:23 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 251015 ***A*** (trigger=1404295). Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 245.007, -54.853 which is
RA(J2000) = 16h 20m 02s
Dec(J2000) = -54d 51' 10"
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 ~1164 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
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: 79.872 s +/- 16.828 s
Estimated T50 duration: 79.872 s +/- 40.7403 s
Estimated Peak Interval: MET 782230689.15199995 +/- 0.500000 s
Estimated background rate 1: 4748.806 near MET 782230669.824000 s
Estimated background rate 2: 4869.541 near MET 782230814.720000 s
Estimated total duration: 79.872 s (for data selection)
(from MET 782230683.648000 to MET 782230763.520000)
Estimated total fluence: -12967.459073 count
Created GTI with 4 entries
------------------------------------------
Search for this GRB position to the previously BAT detected GRB positions (search radius within 5 arcmin)
bat_grb_pos_cat.sh 245.007 -54.853 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 245.007 -54.853
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 10 15 14 309.658929 27.265187
Obj: 2025 10 15 14 318.305817 -30.273155
the object visibility at GSFC, Greenbelt, Maryland
MMT Observatory, Mt. Hopkins, Arizona
TimeUT Azimuth Elevation
Sun: 2025 10 15 14 283.902140 5.576313
Obj: 2025 10 15 14 317.772536 -43.890105
the object visibility at MMT, Mt. Hopkins, Arizona
Hale Telescope, Palomar Mountain, California
TimeUT Azimuth Elevation
Sun: 2025 10 15 14 280.711745 0.292379
Obj: 2025 10 15 14 317.260972 -48.525066
the object visibility at Hale Telescope, Palomar Mt., California
Mauna Kea, Hawaii
TimeUT Azimuth Elevation
Sun: 2025 10 15 14 267.491894 -33.369425
Obj: 2025 10 15 14 347.540720 -53.611179
the object visibility at Mauna Kea, Hawaii
Siding Spring Obs., Australia
TimeUT Azimuth Elevation
Sun: 2025 10 15 14 356.703075 -49.935948
Obj: 2025 10 15 14 22.943268 3.593830
the object visibility at Siding Spring Obs., Australia
Tokyo, Japan
TimeUT Azimuth Elevation
Sun: 2025 10 15 14 149.258507 -61.128232
Obj: 2025 10 15 14 44.137272 -44.864294
the object visibility at Tokyo, Japan
William Herschel Telescope, La Palma, Canary Islands, Spain
TimeUT Azimuth Elevation
Sun: 2025 10 15 14 23.631692 49.709021
Obj: 2025 10 15 14 343.517404 2.531285
the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain
Gemini South, Cerro Pachon, Chile
TimeUT Azimuth Elevation
Sun: 2025 10 15 14 246.609897 48.558609
Obj: 2025 10 15 14 319.566922 28.445168
the object visibility at Gemini South, Cerro Pachon, Chile
The data/results are in /local/data/bat1/prebascript/trigger1404295/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:
Wed Oct 15 10:33:23 EDT 2025