TDRSS lightcurve for Trigger=1150965

Notes:

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 26 Jan 23 11:53:27 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     1150965,   Seg_Num: 0
GRB_RA:           70.258d {+04h 41m 02s} (J2000),
                  70.673d {+04h 42m 41s} (current),
                  69.360d {+04h 37m 26s} (1950)
GRB_DEC:         +44.554d {+44d 33' 14"} (J2000),
                 +44.597d {+44d 35' 48"} (current),
                 +44.458d {+44d 27' 28"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       572 [cnts]    Image_Peak=59 [image_cnts]
TRIGGER_DUR:     0.256 [sec] 
TRIGGER_INDEX:   120     E_range: 15-50 keV
BKG_INTEN:       12901 [cnts]
BKG_TIME:        42777.35 SOD {11:52:57.35} UT
BKG_DUR:         8 [sec]
GRB_DATE:        19970 TJD;    26 DOY;   23/01/26
GRB_TIME:        42794.12 SOD {11:53:14.12} UT
GRB_PHI:         -124.69 [deg]
GRB_THETA:        13.01 [deg]
SOLN_STATUS:     0x1000018D
RATE_SIGNIF:     7.68 [sigma]
IMAGE_SIGNIF:    6.63 [sigma]
MERIT_PARAMS:     +0  +0 +100  -2  +1  -4  +0  +1 +57  +0 
SUN_POSTN:       308.64d {+20h 34m 33s}  -18.71d {-18d 42' 19"}
SUN_DIST:        125.66 [deg]   Sun_angle= -8.1 [hr] (East of Sun)
MOON_POSTN:       10.09d {+00h 40m 22s}   +1.57d {+01d 33' 55"}
MOON_DIST:        68.36 [deg]
MOON_ILLUM:      28 [%]
GAL_COORDS:      159.83, -1.25 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       74.94, 22.14 [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 matches a source in the on-board catalog: Num=10697=LS V +44 17,   delta=0.025 [deg].  
COMMENTS:        This matches a source in the ground catalog: LS V +44 17,   delta=0.025 [deg].  
COMMENTS:        This is not a GRB.  
COMMENTS:        This is an interesting source.  
COMMENTS:        Since the IMAGE_SIGNIF is less than 7 sigma, this is a questionable detection.  
COMMENTS:        This trigger occurred at longitude,latitude = 193.13,-14.87 [deg].

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 26 Jan 23 12:06:00 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     1150965,   Seg_Num: 0
GRB_RA:           70.258d {+04h 41m 02s} (J2000),
                  70.673d {+04h 42m 41s} (current),
                  69.360d {+04h 37m 26s} (1950)
GRB_DEC:         +44.554d {+44d 33' 14"} (J2000),
                 +44.597d {+44d 35' 48"} (current),
                 +44.458d {+44d 27' 28"} (1950)
GRB_DATE:        19970 TJD;    26 DOY;   23/01/26
GRB_TIME:        42794.12 SOD {11:53:14.12} UT
TRIGGER_INDEX:   120
GRB_PHI:         -124.69 [deg]
GRB_THETA:        13.01 [deg]
DELTA_TIME:      -75.00 [sec]
TRIGGER_DUR:     0.256 [sec] 
SOLN_STATUS:     0x18D
RATE_SIGNIF:     7.68 [sigma]
IMAGE_SIGNIF:    6.63 [sigma]
LC_URL:          sw01150965000msb.lc

GCN template for BAT paragraph

  • Click here! 
    At 11:53:14 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 230126 ***A*** (trigger=1150965).  Swift slewed immediately to the burst.
The BAT on-board calculated location is 
RA, Dec 70.258, +44.554 which is 
   RA(J2000) = 04h 41m 02s
   Dec(J2000) = +44d 33' 14"
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 ~1210 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: 137.472 s +/- 8.24085 s
  Estimated T50 duration: 61.696 s +/- 2.90196 s
  Estimated Peak Interval: MET   696426905.47200000 +/- 0.500000 s
  Estimated background rate 1:     2594.141 near MET 696426808.960000 s
  Estimated background rate 2:     2533.517 near MET 696426995.584000 s
  Estimated total duration: 163.328 s (for data selection)
       (from MET 696426817.920000 to MET 696426981.248000)
  Estimated total fluence: 17144.714753 count
  Created GTI with 9 entries
------------------------------------------

    Search for this GRB position to the previously BAT detected GRB positions (search radius within 5 arcmin)

    bat_grb_pos_cat.sh 70.258 44.554 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 70.258 44.554
LSV+44 17 33937 70.247 44.53 0.025249409866134224

    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: 2023 1 26 12 290.412878  -4.649849
 Obj: 2023 1 26 12 164.131664  -4.007578
  • the object visibility at GSFC, Greenbelt, Maryland 
     
MMT Observatory, Mt. Hopkins, Arizona
      TimeUT       Azimuth     Elevation
 Sun: 2023 1 26 12 274.421408  -30.213741
 Obj: 2023 1 26 12 143.537245  1.945268
  • the object visibility at MMT, Mt. Hopkins, Arizona 
     
Hale Telescope, Palomar Mountain, California
      TimeUT       Azimuth     Elevation
 Sun: 2023 1 26 12 270.264750  -35.321033
 Obj: 2023 1 26 12 140.534718  6.362521
  • the object visibility at Hale Telescope, Palomar Mt., California 
     
Mauna Kea, Hawaii
      TimeUT       Azimuth     Elevation
 Sun: 2023 1 26 12 270.261337  -70.250199
 Obj: 2023 1 26 12 131.303102  21.514097
  • the object visibility at Mauna Kea, Hawaii 
     
Siding Spring Obs., Australia
      TimeUT       Azimuth     Elevation
 Sun: 2023 1 26 12 38.338440  -30.035572
 Obj: 2023 1 26 12 163.228372  11.135403
  • the object visibility at Siding Spring Obs., Australia 
     
Tokyo, Japan
      TimeUT       Azimuth     Elevation
 Sun: 2023 1 26 12 95.487506  -42.191403
 Obj: 2023 1 26 12 154.849591  78.534767
  • the object visibility at Tokyo, Japan 
     
William Herschel Telescope, La Palma, Canary Islands, Spain
      TimeUT       Azimuth     Elevation
 Sun: 2023 1 26 12 333.787543  38.161422
 Obj: 2023 1 26 12 205.412901  -9.488999
  • the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain 
     
Gemini South, Cerro Pachon, Chile
      TimeUT       Azimuth     Elevation
 Sun: 2023 1 26 12 279.318738  22.242746
 Obj: 2023 1 26 12 142.066336  -70.659556
  • the object visibility at Gemini South, Cerro Pachon, Chile 
     
 
 
The data/results are in /local/data/bat1/prebascript/trigger1150965/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 Jan 26 07:06:42 EST 2023