TDRSS lightcurve for Trigger=1213872

Notes:

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 08 Feb 24 16:28:09 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     1213872,   Seg_Num: 0
GRB_RA:          245.388d {+16h 21m 33s} (J2000),
                 245.732d {+16h 22m 56s} (current),
                 244.676d {+16h 18m 42s} (1950)
GRB_DEC:         -15.898d {-15d 53' 51"} (J2000),
                 -15.953d {-15d 57' 11"} (current),
                 -15.780d {-15d 46' 48"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       0 [cnts]    Image_Peak=9941 [image_cnts]
TRIGGER_DUR:     248.000 [sec]   (=4.1 [min])
TRIGGER_INDEX:   20000     E_range: 15-50 keV
BKG_INTEN:       0 [cnts]
BKG_TIME:        0.00 SOD {00:00:00.00} UT
BKG_DUR:         0 [sec]
GRB_DATE:        20348 TJD;    39 DOY;   24/02/08
GRB_TIME:        59031.12 SOD {16:23:51.12} UT
GRB_PHI:         159.19 [deg]
GRB_THETA:        33.97 [deg]
SOLN_STATUS:     0x413
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    16.11 [sigma]
MERIT_PARAMS:     +1  +0  +0  +8  +1  +4  +0  +0 -28  +0 
SUN_POSTN:       321.82d {+21h 27m 17s}  -15.00d {-15d 00' 01"}
SUN_DIST:         72.88 [deg]   Sun_angle= 5.1 [hr] (West of Sun)
MOON_POSTN:      305.05d {+20h 20m 12s}  -24.56d {-24d 33' 24"}
MOON_DIST:        55.91 [deg]
MOON_ILLUM:      2 [%]
GAL_COORDS:      359.15, 23.32 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      246.27,  5.54 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT-BAT GRB Coordinates.  
COMMENTS:        This is an image trigger.  (The RATE_SIGNIF & BKG_{INTEN, TIME, DUR} are undefined.)  
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 = 240.55,-18.05 [deg].  
COMMENTS:           
COMMENTS:        This trigger occured while the StarTracker had lost lock, so it is possibly bogus.

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 08 Feb 24 16:34:52 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     1213872,   Seg_Num: 0
GRB_RA:          245.388d {+16h 21m 33s} (J2000),
                 245.732d {+16h 22m 56s} (current),
                 244.676d {+16h 18m 42s} (1950)
GRB_DEC:         -15.898d {-15d 53' 51"} (J2000),
                 -15.953d {-15d 57' 11"} (current),
                 -15.780d {-15d 46' 48"} (1950)
GRB_DATE:        20348 TJD;    39 DOY;   24/02/08
GRB_TIME:        59031.12 SOD {16:23:51.12} UT
TRIGGER_INDEX:   20000
GRB_PHI:         159.19 [deg]
GRB_THETA:        33.97 [deg]
DELTA_TIME:      320.00 [sec]
TRIGGER_DUR:     248.000 [sec]   (=4.1 [min])
SOLN_STATUS:     0x413
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    16.11 [sigma]
LC_URL:          sw01213872000msb.lc

GCN template for BAT paragraph

  • Click here! 
    At 16:23:51 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 240208 ***A*** (trigger=1213872).  Swift slewed immediately to the burst.
The BAT on-board calculated location is 
RA, Dec 245.388, -15.898 which is 
   RA(J2000) = 16h 21m 33s
   Dec(J2000) = -15d 53' 51"
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 ~1109 counts/sec (15-350 keV), at ~7 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

    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 background rate 1:     4478.531 near MET 729102304.000000 s
  Estimated background rate 2:     4478.531 near MET 729102304.000000 s
  Estimated total fluence: 0.000000 count
  Created GTI with 1 entries
------------------------------------------

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

    bat_grb_pos_cat.sh 245.388 -15.898 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 245.388 -15.898
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: 2024 2 8 16 335.849997  32.524899
 Obj: 2024 2 8 16 54.670331  14.673725
  • the object visibility at GSFC, Greenbelt, Maryland 
     
MMT Observatory, Mt. Hopkins, Arizona
      TimeUT       Azimuth     Elevation
 Sun: 2024 2 8 16 302.933677  19.620031
 Obj: 2024 2 8 16 26.210615  38.188569
  • the object visibility at MMT, Mt. Hopkins, Arizona 
     
Hale Telescope, Palomar Mountain, California
      TimeUT       Azimuth     Elevation
 Sun: 2024 2 8 16 299.350957  14.440034
 Obj: 2024 2 8 16 18.786486  38.581405
  • the object visibility at Hale Telescope, Palomar Mt., California 
     
Mauna Kea, Hawaii
      TimeUT       Azimuth     Elevation
 Sun: 2024 2 8 16 281.252749  -13.795505
 Obj: 2024 2 8 16 325.581394  47.419455
  • the object visibility at Mauna Kea, Hawaii 
     
Siding Spring Obs., Australia
      TimeUT       Azimuth     Elevation
 Sun: 2024 2 8 16 328.836922  -37.863515
 Obj: 2024 2 8 16 278.363590  17.483561
  • the object visibility at Siding Spring Obs., Australia 
     
Tokyo, Japan
      TimeUT       Azimuth     Elevation
 Sun: 2024 2 8 16 203.432633  -69.190411
 Obj: 2024 2 8 16 280.339829  -13.419706
  • the object visibility at Tokyo, Japan 
     
William Herschel Telescope, La Palma, Canary Islands, Spain
      TimeUT       Azimuth     Elevation
 Sun: 2024 2 8 16 45.143175  32.784966
 Obj: 2024 2 8 16 86.627348  -28.532453
  • the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain 
     
Gemini South, Cerro Pachon, Chile
      TimeUT       Azimuth     Elevation
 Sun: 2024 2 8 16 225.302976  69.372422
 Obj: 2024 2 8 16 89.849860  32.681877
  • the object visibility at Gemini South, Cerro Pachon, Chile 
     
 
 
The data/results are in /local/data/bat1/prebascript/trigger1213872/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 Feb  8 11:35:44 EST 2024