TDRSS lightcurve for Trigger=1404904
Notes:
- 1) None of the TDRSS light curves are background subtracted.
GCN BAT Position Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Fri 17 Oct 25 08:41:02 UT
NOTICE_TYPE: Swift-BAT GRB Position
TRIGGER_NUM: 1404904, Seg_Num: 0
GRB_RA: 335.386d {+22h 21m 33s} (J2000),
335.709d {+22h 22m 50s} (current),
334.760d {+22h 19m 02s} (1950)
GRB_DEC: +7.051d {+07d 03' 02"} (J2000),
+7.181d {+07d 10' 53"} (current),
+6.798d {+06d 47' 53"} (1950)
GRB_ERROR: 3.00 [arcmin radius, statistical only]
GRB_INTEN: 2728 [cnts] Image_Peak=190 [image_cnts]
TRIGGER_DUR: 1.024 [sec]
TRIGGER_INDEX: 146 E_range: 25-100 keV
BKG_INTEN: 15473 [cnts]
BKG_TIME: 31227.48 SOD {08:40:27.48} UT
BKG_DUR: 8 [sec]
GRB_DATE: 20965 TJD; 290 DOY; 25/10/17
GRB_TIME: 31244.63 SOD {08:40:44.63} UT
GRB_PHI: -0.87 [deg]
GRB_THETA: 21.09 [deg]
SOLN_STATUS: 0x3
RATE_SIGNIF: 15.71 [sigma]
IMAGE_SIGNIF: 9.52 [sigma]
MERIT_PARAMS: +1 +0 +0 +0 +2 +0 +0 +0 +68 +0
SUN_POSTN: 202.44d {+13h 29m 45s} -9.39d {-09d 23' 39"}
SUN_DIST: 133.74 [deg] Sun_angle= -8.9 [hr] (East of Sun)
MOON_POSTN: 159.74d {+10h 38m 58s} +9.56d {+09d 33' 26"}
MOON_DIST: 162.79 [deg]
MOON_ILLUM: 16 [%]
GAL_COORDS: 70.73,-40.17 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 339.89, 16.08 [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 = 169.41,20.14 [deg].
GCN BAT Lightcurve Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Fri 17 Oct 25 08:58:59 UT
NOTICE_TYPE: Swift-BAT GRB Lightcurve
TRIGGER_NUM: 1404904, Seg_Num: 0
GRB_RA: 335.386d {+22h 21m 33s} (J2000),
335.709d {+22h 22m 50s} (current),
334.760d {+22h 19m 02s} (1950)
GRB_DEC: +7.051d {+07d 03' 02"} (J2000),
+7.181d {+07d 10' 53"} (current),
+6.798d {+06d 47' 53"} (1950)
GRB_DATE: 20965 TJD; 290 DOY; 25/10/17
GRB_TIME: 31244.63 SOD {08:40:44.63} UT
TRIGGER_INDEX: 146
GRB_PHI: -0.87 [deg]
GRB_THETA: 21.09 [deg]
DELTA_TIME: 44.00 [sec]
TRIGGER_DUR: 1.024 [sec]
SOLN_STATUS: 0x3
RATE_SIGNIF: 15.71 [sigma]
IMAGE_SIGNIF: 9.52 [sigma]
LC_URL: sw01404904000msb.lc
GCN template for BAT paragraph
Click here!
At 08:40:44 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 251017 ***A*** (trigger=1404904). Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 335.386, +7.051 which is
RA(J2000) = 22h 21m 33s
Dec(J2000) = +07d 03' 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 ~2136 counts/sec (15-350 keV), at ~6 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: 11.84 s +/- 0.652674 s
Estimated T50 duration: 5.888 s +/- 0.286217 s
Estimated Peak Interval: MET 782383287.87199998 +/- 0.500000 s
Estimated background rate 1: 3765.104 near MET 782383266.240000 s
Estimated background rate 2: 3892.465 near MET 782383410.176000 s
Estimated total duration: 77.952 s (for data selection)
(from MET 782383274.880000 to MET 782383352.832000)
Estimated total fluence: 9929.150772 count
Created GTI with 10 entries
------------------------------------------
Search for this GRB position to the previously BAT detected GRB positions (search radius within 5 arcmin)
bat_grb_pos_cat.sh 335.386 7.051 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 335.386 7.051
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 17 8 247.029739 -39.262211
Obj: 2025 10 17 8 97.461982 2.164369
the object visibility at GSFC, Greenbelt, Maryland
MMT Observatory, Mt. Hopkins, Arizona
TimeUT Azimuth Elevation
Sun: 2025 10 17 8 209.743575 -64.973687
Obj: 2025 10 17 8 79.209699 30.005591
the object visibility at MMT, Mt. Hopkins, Arizona
Hale Telescope, Palomar Mountain, California
TimeUT Azimuth Elevation
Sun: 2025 10 17 8 195.055770 -65.358655
Obj: 2025 10 17 8 74.232257 34.535986
the object visibility at Hale Telescope, Palomar Mt., California
Mauna Kea, Hawaii
TimeUT Azimuth Elevation
Sun: 2025 10 17 8 103.803863 -57.146642
Obj: 2025 10 17 8 49.827539 71.134250
the object visibility at Mauna Kea, Hawaii
Siding Spring Obs., Australia
TimeUT Azimuth Elevation
Sun: 2025 10 17 8 80.812246 2.932094
Obj: 2025 10 17 8 232.758304 35.030577
the object visibility at Siding Spring Obs., Australia
Tokyo, Japan
TimeUT Azimuth Elevation
Sun: 2025 10 17 8 74.055627 6.275529
Obj: 2025 10 17 8 283.199337 30.525752
the object visibility at Tokyo, Japan
William Herschel Telescope, La Palma, Canary Islands, Spain
TimeUT Azimuth Elevation
Sun: 2025 10 17 8 285.738234 8.567455
Obj: 2025 10 17 8 138.736663 -45.084740
the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain
Gemini South, Cerro Pachon, Chile
TimeUT Azimuth Elevation
Sun: 2025 10 17 8 299.795153 -26.111971
Obj: 2025 10 17 8 91.777473 -11.312142
the object visibility at Gemini South, Cerro Pachon, Chile
The data/results are in /local/data/bat1/prebascript/trigger1404904/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:
Fri Oct 17 04:59:23 EDT 2025