TDRSS lightcurve for Trigger=887217

Notes:

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 02 Feb 19 01:40:17 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     887217,   Seg_Num: 0
GRB_RA:          166.512d {+11h 06m 03s} (J2000),
                 166.761d {+11h 07m 03s} (current),
                 165.861d {+11h 03m 27s} (1950)
GRB_DEC:          +9.388d {+09d 23' 17"} (J2000),
                  +9.285d {+09d 17' 05"} (current),
                  +9.658d {+09d 39' 30"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       10274 [cnts]    Image_Peak=153 [image_cnts]
TRIGGER_DUR:     3.072 [sec] 
TRIGGER_INDEX:   487     E_range: 50-350 keV
BKG_INTEN:       52632 [cnts]
BKG_TIME:        5921.65 SOD {01:38:41.65} UT
BKG_DUR:         32 [sec]
GRB_DATE:        18516 TJD;    33 DOY;   19/02/02
GRB_TIME:        5970.35 SOD {01:39:30.35} UT
GRB_PHI:         141.57 [deg]
GRB_THETA:        49.55 [deg]
SOLN_STATUS:     0x20000003
RATE_SIGNIF:     68.06 [sigma]
IMAGE_SIGNIF:    7.85 [sigma]
MERIT_PARAMS:     +1  +0  +0  +2  +3  -2  +0  +0 +85  +0 
SUN_POSTN:       315.37d {+21h 01m 29s}  -16.94d {-16d 56' 13"}
SUN_DIST:        148.53 [deg]   Sun_angle= 9.9 [hr] (West of Sun)
MOON_POSTN:      283.30d {+18h 53m 13s}  -21.57d {-21d 33' 55"}
MOON_DIST:       118.00 [deg]
MOON_ILLUM:      7 [%]
GAL_COORDS:      243.44, 59.46 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      163.95,  3.33 [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 = 298.01,6.86 [deg].  
COMMENTS:           
COMMENTS:        NOTE: This BAT event is temporally(4.0<100sec) coincident with the FERMI_GBM event (trignum=570764371).

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 02 Feb 19 01:59:19 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     887217,   Seg_Num: 0
GRB_RA:          166.512d {+11h 06m 03s} (J2000),
                 166.761d {+11h 07m 03s} (current),
                 165.861d {+11h 03m 27s} (1950)
GRB_DEC:          +9.388d {+09d 23' 17"} (J2000),
                  +9.285d {+09d 17' 05"} (current),
                  +9.658d {+09d 39' 30"} (1950)
GRB_DATE:        18516 TJD;    33 DOY;   19/02/02
GRB_TIME:        5970.35 SOD {01:39:30.35} UT
TRIGGER_INDEX:   487
GRB_PHI:         141.57 [deg]
GRB_THETA:        49.55 [deg]
DELTA_TIME:      -69.00 [sec]
TRIGGER_DUR:     3.072 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     68.06 [sigma]
IMAGE_SIGNIF:    7.85 [sigma]
LC_URL:          sw00887217000msb.lc

GCN template for BAT paragraph

  • Click here! 
    At 01:39:30 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 190202 ***A*** (trigger=887217).  Swift slewed immediately to the burst.
The BAT on-board calculated location is 
RA, Dec 166.512, +9.388 which is 
   RA(J2000) = 11h 06m 03s
   Dec(J2000) = +09d 23' 17"
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 ~4503 counts/sec (15-350 keV), at ~5 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: 44.48 s +/- 4.096 s
  Estimated T50 duration: 7.424 s +/- 0.286217 s
  Estimated Peak Interval: MET   570764394.55999994 +/- 0.500000 s
  Estimated background rate 1:     3832.945 near MET 570764377.440000 s
  Estimated background rate 2:     3647.010 near MET 570764524.672000 s
  Estimated total duration: 84.544 s (for data selection)
       (from MET 570764386.880000 to MET 570764471.424000)
  Estimated total fluence: 23770.694086 count
  Created GTI with 15 entries
------------------------------------------

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

    bat_grb_pos_cat.sh 166.512 9.388 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 166.512 9.388
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: 2019 2 2 2 101.755673  -40.822306
 Obj: 2019 2 2 2 267.622831  11.866283
  • the object visibility at GSFC, Greenbelt, Maryland 
     
MMT Observatory, Mt. Hopkins, Arizona
      TimeUT       Azimuth     Elevation
 Sun: 2019 2 2 2 78.014721  -13.156605
 Obj: 2019 2 2 2 247.563428  -16.618765
  • the object visibility at MMT, Mt. Hopkins, Arizona 
     
Hale Telescope, Palomar Mountain, California
      TimeUT       Azimuth     Elevation
 Sun: 2019 2 2 2 75.329897  -8.631139
 Obj: 2019 2 2 2 243.131009  -20.509913
  • the object visibility at Hale Telescope, Palomar Mt., California 
     
Mauna Kea, Hawaii
      TimeUT       Azimuth     Elevation
 Sun: 2019 2 2 2 57.017289  28.128149
 Obj: 2019 2 2 2 214.831836  -55.268955
  • the object visibility at Mauna Kea, Hawaii 
     
Siding Spring Obs., Australia
      TimeUT       Azimuth     Elevation
 Sun: 2019 2 2 2 198.145951  74.984065
 Obj: 2019 2 2 2 64.689272  -49.871218
  • the object visibility at Siding Spring Obs., Australia 
     
Tokyo, Japan
      TimeUT       Azimuth     Elevation
 Sun: 2019 2 2 2 334.798155  34.720552
 Obj: 2019 2 2 2 120.872859  -23.669064
  • the object visibility at Tokyo, Japan 
     
William Herschel Telescope, La Palma, Canary Islands, Spain
      TimeUT       Azimuth     Elevation
 Sun: 2019 2 2 2 214.344433  -75.988355
 Obj: 2019 2 2 2 307.246885  60.807296
  • the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain 
     
Gemini South, Cerro Pachon, Chile
      TimeUT       Azimuth     Elevation
 Sun: 2019 2 2 2 48.666538  -25.998540
 Obj: 2019 2 2 2 254.953893  6.908422
  • the object visibility at Gemini South, Cerro Pachon, Chile 
     
 
 
The data/results are in /local/data/bat1/prebascript/trigger887217/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 Feb  1 21:00:07 EST 2019