batgrbproduct analysis for trigger=357811

Analysis for Ground-detected GRB: Trigger=357811

Analysis Summary

Notes:

1) No attempt has been made to eliminate the non-significant decimal places.
2) This is a special analysis for ground-detected GRB. The event data duration is likely to be shorter than the burst duration. In such cases, the burst durations are found using the quad-rate data, and spectral analyses are only available for event data range.
3) Some mask-weighted light curve plots might be missing because the time range is not completely covered by the event data range.

Special note: This burst was outside the BAT calibrated field of view (the FLUX mask region) in the whole event data range (see figure below), hence spectral analysis is not available.

FLUX-mask-weighted light curve (pcodethresh=0.05; aperture=CALDB:FLUX)

==========================================================================
           BAT GROUND-DETECTED GRB DATA PROCESSING REPORT                 
    Process Script Ver: batgrbproduct v2.46
    Process Start Time: Thu Dec 17 18:14:09 EST 2015
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger357811
======================================================================

  Trigger: 00357811      Segment: 000

  BAT Trigger Time: 269764691.2
               UTC: 2009-07-20T06:38:06.274   [includes UTCF correction]
       Where From?: Ground analysis (best_duration.txt)
  NOTE: BAT trigger time for ground-detected burst is the T100 start time.
 
  Analysis Position:   [ source = GCN ]
    RA: 203.702   Dec: -10.339  [deg; J2000]
 
  Refined Position:   [ source = BAT pre-slew image ]
    RA: 203.702   Dec: -10.339  [deg; J2000]
        { 13h 34m 48.5s , -10d -20' -20.4" }
        +/- 2.6762915679 [arcmin] (estimated 90% radius based on SNR)
    SNR: 7.45440802857
 
  Angular difference between the GCN position (ra=203.702, dec=-10.339 deg) and this refined position is 0.000 arcmin
 
  Partial Coding Fraction: 0.0246582    [ including projection effects ]

  Duration
     T90: 4.80000001192093 +/- 1.6
        Measured from: 0
                   to: 4.8     [s; relative to TRIGTIME]
     T50: 1.60000002384186 +/- 1.6
        Measured from: 1.6
                   to: 3.2     [s; relative to TRIGTIME]

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100    4.800    0.000    4.800
T90     4.800    0.000    4.800
T50     1.600    1.600    3.200
Peak    1.000    1.900    2.900

Click here for the BAT GCN circular template

Special notes of this burst

Image

15.0-350.0 keV image (Event data with DETECTION mask)

#RAcent DECcent POSerr Theta  Phi  Peak_Cts  SNR Name
203.702 -10.339 0.000 58.196 5.204 1.710 7.454 TRIG_00357811
Image time interval: 0.000 to 4.800 [sec]

Lightcurves

Notes:

1) The mask-weighted lightcurves have units of either count/det or counts/sec/det, where a det is 0.4 x 0.4 = 0.16 sq cm.
2) The verticle lines correspond to following: green dotted lines are T50 interval, black dotted lines are T90 interval, blue solid line(s) is a spacecraft slew start time, and orange solid line(s) is a spacecraft slew end time (for the best duration plot, slew times are marked by green arrows).
3) For lightcurves in unit of count rate, time of each bin is in the middle of the bin.

Best duration plot

1 s binning

From T0-310 s to T0+310 s

From T100_start - 20 s to T100_end + 30 s

Full time interval

64 ms binning

Full time interval

From T100_start to T100_end

From T0-5 sec to T0+5 sec

16 ms binning

From T100_start-5 s to T100_start+5 s

8 ms binning

From T100_start-3 s to T100_start+3 s

2 ms binning

From T100_start-1 s to T100_start+1 s

SN=5 or 10 sec. binning (whichever binning is satisfied first)

SN=5 or 10 sec. binning (T < 200 sec)

Quad-rate summed light curves (from T0-300s to T0+1000s)

Mask shadow pattern (with DETECTION mask)

IMX = 1.60590996686, IMY = -0.146259108924

TIME vs. PHA plot around the beginning of event data (event_start to event_start+0.64s) with DETECTION mask

TIME vs. DetID plot around the beginning of event data (event_start to event_start+0.64s) with DETECTION mask

100 us light curve (15-350 keV; (event_start to event_start+0.64s)

Spacecraft aspect plot

Bright source in the event data image

Event data image of 15-350 keV band

Time interval of the image:
1.152000 7.856200
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.3265 -40.5390   64.0  25.7  -97.8   0.0064   0.2    9.3	Vela X-1                      
170.0101 -60.6962   11.3   3.8   61.1   0.0267   1.0   10.0	Cen X-3                       
186.2636 -62.8521    4.1  11.6   70.5   0.0735   2.8   11.8	GX 301-2                      
 42.9709 -55.6452    2.9  54.9  172.5   0.4053   3.9 ------	UNKNOWN                       
203.7089 -10.3493    2.1  58.2    5.2   1.4096   5.5 ------	UNKNOWN                       
 68.7660 -41.5964    2.4  56.7 -161.1   0.4593   4.8 ------	UNKNOWN

Webpage updated on:
Thu Dec 17 18:19:51 EST 2015