batgrbproduct analysis for trigger=332287

batgrbproduct Analysis for Trigger=332287

Analysis Summary

Notes:

1) No attempt has been made to eliminate the non-significant decimal places.
2) This batgrbproduct analysis is done of the amount of data for this trigger downloaded to date.
3) This page will be updated for up to 8 downlinks after the trigger.

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Tue Oct 21 17:20:01 EDT 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger332287/GCN5_download_cron
======================================================================

  Trigger: 00332287      Segment: 000

  BAT Trigger Time: 246280830.08   [s; MET]
      Trigger Stop: 246280830.336   [s; MET]
               UTC: 2008-10-21T11:20:26.887860    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 301.006315352213   Dec: 21.6824280352001  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    6.72
     Image Trigger?:     NO
     Rate S/N Ratio:     8.18535277187245  [ if not an image trigger ]
     Image S/N Ratio:    6.72

  Flight Position:   [ source = BAT ]
    RA: 301.006315352213   Dec: 21.6824280352001  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 301.158806848159   Dec: 21.6842784360087  [deg; J2000]  
        { 20h 04m 38.1s , +21d 41' 03.4" }
         +/- 3.28673833109995 [arcmin] (estimated 90% radius based on SNR)
         +/- 2.07645563134671 [arcmin] (formal 1-sigma fit error)
    SNR: 5.55753850510983
 
  Angular difference between Flight and Ground position is 8.502796 arcmin
 
  Partial Coding Fraction: 1.015625    [ including projection effects ]

  Duration
     T90: 0.255999982357025 +/- 
        Measured from: 0
                   to: 0.255999982357025     [s; relative to TRIGTIME]
     T50: 0.255999982357025 +/- 
        Measured from: 0
                   to: 0.255999982357025     [s; relative to TRIGTIME]

    WARNING: battblocks failed.  Used TDRSS fore/background intervals

  Fluence
     Peak Flux  (peak 0.255999982357025 second)
        Measured from: 0     
                   to: 0.255999982357025     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0     
                   to: 0.255999982357025     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.009232   0.012636  -0.000120  -0.000335
           0.002703   0.002696   0.002311   0.001806 [error]
 Peak      0.009232   0.012636  -0.000120  -0.000335
           0.002703   0.002696   0.002311   0.001806 [error]

     [ fluence units of on-axis counts / fully illuminated detector ] 

======================================================================
 
=== Fluence/Peak Flux Summary ===
 
              Model    Band1    Band2    Band3    Band4    Band5    Total      
                       15-25    25-50   50-100  100-350   15-150   15-350   keV
Fluence   Power-law 1.97e-09 2.95e-09 3.29e-09 6.96e-09 1.03e-08 1.52e-08   erg/cm2
              Error 9.52e-10 1.10e-09 1.85e-09 8.94e-09 4.55e-09 1.01e-08   erg/cm2
Peak flux Power-law 2.54e-01 2.08e-01 1.16e-01 9.46e-02 6.20e-01 6.73e-01   ph/cm2/s
              Error 1.22e-01 7.63e-02 6.26e-02 9.85e-02 2.27e-01 2.51e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.30e-09 4.36e-09 9.55e-10 6.53e-12 7.62e-09 7.63e-09   erg/cm2
              Error 9.92e-10 1.57e-09 1.17e-09 7.38e-11 2.64e-09 2.64e-09   erg/cm2
Peak flux Cutoff-PL 2.87e-01 3.15e-01 3.89e-02 1.41e-04 6.42e-01 6.42e-01   ph/cm2/s
              Error 1.23e-01 1.07e-01 4.50e-02 1.49e-03 2.04e-01 2.04e-01   ph/cm2/s
 
Fluence        Band 1.98e-09 3.75e-09 2.77e-09 2.57e-09 8.58e-09 1.12e-08   erg/cm2
              Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   erg/cm2
Peak flux      Band 2.61e-01 2.62e-01 9.55e-02 3.36e-02 6.40e-01 6.30e-01   ph/cm2/s
              Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   ph/cm2/s

 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.841    0.616    -      -           4.37e-03 1.92e-03   57.430 57
CPL  -4.893    0.000      31.1    5.5      2.07e+02 1.48e+02   49.370 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.850    0.605    -      -           4.41e-03 1.92e-03   58.080 57
CPL  -4.889    0.000      31.0    5.4      2.13e+02 1.50e+02   49.860 56
 
Model      : spectral model: simple power-law (PL) and cutoff power-law (CPL)
Ph_index   : photon index: E^-{Ph_index} (minus sign is not included in the index)
Ph_90err   : 90% error of the photon index
Epeak      : Epeak in keV
Epeak_90err: 90% error of Epeak
Norm       : normalization at 50 keV in PL model and at 1 keV in CPL model
Nomr_90err : 90% error of the normalization
chi2       : Chi-Squared
dof        : degree of freedom

 
=== T90/T50 calculation in the 50-300 keV band (BATSE band) using 64 ms lc ===
 
T90 in the 50-300 keV band: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100    0.256    0.000    0.256
T90     0.256    0.000    0.256
T50     0.256    0.000    0.256
Peak    0.256    0.000    0.256

Click here for the BAT GCN circular template

Image

Pre-slew 15-350 keV image (Event data; bkg subtracted)

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  301.1588 +21.6843 0.0344    2.5   72.0       0.0267     5.6  TRIG_00332287       
------------------------------------------
 
Foreground time interval of the image:
  0.000   0.256 (delta_t =   0.256 [sec])
Background time interval of the image:
-114.779  -6.080 (delta_t = 108.699 [sec])

Lightcurves

Notes:

1) All plots contain as much data as has been downloaded to date.
2) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
3) For all the mask-weighted lightcurves, the y-axis units are counts/sec/det where a det is 0.4 x 0.4 = 0.16 sq cm.
4) 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.
5) Time of each bin is in the middle of the bin.

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

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.256000

8 ms binning

From T100_start-3 s to T100_start+3 s

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.256000

2 ms binning

From T100_start-1 s to T100_start+1 s

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.256000

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

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

Flight mask-tagged light curves

Caution: Mask-weight map is always using the same on-axis map

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

Spectra

Notes:

1) The fitting includes the systematic errors.
2) For long bursts, a spectral fit of the pre-slew DRM will introduce some errors in both a spectral shape and a normalization if the PHA file contains a lot of the slew/post-slew time interval.
3) For fits to more complicated models (e.g. a power-law over a cutoff power-law), the BAT team has decided to require a chi-square improvement of more than 6 for each extra dof.
4) For short bursts (T90<1sec), the specrtum is also fit with Blackbody, OTTB, and Double Blackbody.

Time averaged spectrum fit using the pre-slew DRM

Power-law model

Time interval is from    0.000 sec. to    0.256 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.84078     ( -0.593831   0.637506 )
Norm@50keV  : 4.37453E-03    ( -0.00193919   0.00189958 )
------------------------------------------------------------
# Chi-Squared =          57.43 using 59 PHA bins.
# Reduced chi-squared =          1.007 for     57 degrees of freedom 
# Null hypothesis probability =   4.592758e-01
 
Photon flux (15-150 keV)    in 0.256 sec: 0.612971 ( -0.228232  0.228232 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.0309e-08 ( -4.37824e-09  4.72407e-09 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.000 sec. to    0.256 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -4.89271     (     )
Epeak [keV] : 31.0999      ( -5.03917 5.88414 )
Norm@50keV  : 207.159    ( -207.161   87.9402 )
------------------------------------------------------------
# Chi-Squared =          49.37 using 59 PHA bins.
# Reduced chi-squared =         0.8817 for     56 degrees of freedom 
# Null hypothesis probability =   7.220442e-01
 
Photon flux (15-150 keV)    in 0.256 sec: 0.634926 ( -0.205506  0.20565 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.62414e-09 ( -2.59036e-09  2.68628e-09 ) ergs/cm2

Band function

Time interval is from    0.000 sec. to    0.256 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.98763   ( -166.337   -156.338 )
beta        : -8.10127    ( 6.47272   4.09698 )
Epeak [keV] : 30.9391      ( -4.85665 6.01174 )
Norm@50keV   : 247.740    ( -88.9256   213.513 )
------------------------------------------------------------
# Chi-Squared =          49.31 using 59 PHA bins.
# Reduced chi-squared =         0.8966 for     55 degrees of freedom 
# Null hypothesis probability =   6.906773e-01
 
Photon flux (15-150 keV)    in 0.256 sec: 0.640033 ( -0.221817  0.221852 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.57933e-09 ( -3.20566e-09  1.71366e-09 ) ergs/cm2

Peak spectrum fit

Power-law model

Time interval is from    0.000 sec. to    0.256 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.84958     ( -0.581886   0.628537 )
Norm@50keV  : 4.41157E-03    ( -0.00193582   0.0018974 )
------------------------------------------------------------
# Chi-Squared =          58.08 using 59 PHA bins.
# Reduced chi-squared =          1.019 for     57 degrees of freedom 
# Null hypothesis probability =   4.352227e-01
 
Photon flux (15-150 keV)    in 0.256 sec: 0.620389 ( -0.226981  0.226987 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.03955e-08 ( -4.36001e-09  4.70812e-09 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.000 sec. to    0.256 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -4.88858     (     )
Epeak [keV] : 30.9895      ( -4.97327 5.78188 )
Norm@50keV  : 212.829    ( -212.831   87.0231 )
------------------------------------------------------------
# Chi-Squared =          49.86 using 59 PHA bins.
# Reduced chi-squared =         0.8903 for     56 degrees of freedom 
# Null hypothesis probability =   7.051451e-01
 
Photon flux (15-150 keV)    in 0.256 sec: 0.641616 ( -0.204277  0.204378 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.62665e-09 ( 2.7019e-09  -7.62665e-09 ) ergs/cm2

Band function

Time interval is from    0.000 sec. to    0.256 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.98908   ( -186.82   -176.82 )
beta        : -8.16771    ( 6.5428   4.13161 )
Epeak [keV] : 30.8220      ( -4.78454 5.91311 )
Norm@50keV   : 257.176    ( -257.213   301.083 )
------------------------------------------------------------
# Chi-Squared =          49.80 using 59 PHA bins.
# Reduced chi-squared =         0.9054 for     55 degrees of freedom 
# Null hypothesis probability =   6.730613e-01
 
Photon flux (15-150 keV)    in 0.256 sec: 0.640033 ( -0.221817  0.221852 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.57933e-09 ( -3.20566e-09  1.71366e-09 ) ergs/cm2

Pre-slew spectrum (Pre-slew PHA with pre-slew DRM)

Power-law model

 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.84078     ( -0.593831   0.637506 )
Norm@50keV  : 4.37453E-03    ( -0.00193919   0.00189958 )
------------------------------------------------------------
# Chi-Squared =          57.43 using 59 PHA bins.
# Reduced chi-squared =          1.007 for     57 degrees of freedom 
# Null hypothesis probability =   4.592758e-01
 
Photon flux (15-150 keV)    in 0.256 sec: 0.612971 ( -0.228232  0.228232 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.0309e-08 ( -4.37824e-09  4.72407e-09 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -4.89271     (     )
Epeak [keV] : 31.0999      ( -5.03917 5.88414 )
Norm@50keV  : 207.159    ( -207.161   87.9402 )
------------------------------------------------------------
# Chi-Squared =          49.37 using 59 PHA bins.
# Reduced chi-squared =         0.8817 for     56 degrees of freedom 
# Null hypothesis probability =   7.220442e-01
 
Photon flux (15-150 keV)    in 0.256 sec: 0.634926 ( -0.205506  0.20565 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.62414e-09 ( -2.59036e-09  2.68628e-09 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.98763   ( -166.337   -156.338 )
beta        : -8.10127    ( 6.47272   4.09698 )
Epeak [keV] : 30.9391      ( -4.85639 6.01097 )
Norm@50keV   : 247.740    ( -88.9256   213.513 )
------------------------------------------------------------
# Chi-Squared =          49.31 using 59 PHA bins.
# Reduced chi-squared =         0.8966 for     55 degrees of freedom 
# Null hypothesis probability =   6.906773e-01
 
Photon flux (15-150 keV)    in 0.256 sec: 0.640033 ( -0.221817  0.221852 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.57933e-09 ( -3.20566e-09  1.71366e-09 ) ergs/cm2

S(25-50 keV) vs. S(50-100 keV) plot

S(25-50 keV)  = 2.94541e-09
S(50-100 keV) = 3.29124e-09

T90 vs. Hardness ratio plot

T90                                   = 0.255999982357025 sec.
Hardness ratio (energy fluence ratio) = 1.11741

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.36872
Count Ratio (50-100 keV) / (15-25 keV) = -0.0129983

Mask shadow pattern

IMX = 0, IMY = 0

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.256000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.256000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.256000

Spacecraft aspect plot

Bright source in the pre-burst/pre-slew/post-slew images

Pre-burst image of 15-350 keV band

Time interval of the image:
-114.779400 -6.080000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.5810  35.4618    5.0  41.0  -58.3   0.6620   2.3    9.4	Her X-1                       
268.3490  -1.4173    2.8  37.0 -122.1   0.8139   4.1    2.4	SW J1753.5-0127               
270.3603 -25.1598    9.1  53.6 -146.6  -0.5924  -1.3    6.4	GX 5-1                        
270.4630 -25.9123    6.4  54.2 -147.2   0.9351   1.8   13.4	GRS 1758-258                  
273.8769 -14.0487 2700.0  42.5 -141.9   0.0005   0.0    7.5	GX 17+2                       
276.0615 -30.4336    5.0  55.7 -155.2   1.0852   2.3    8.1	H1820-303                     
284.9312 -24.8092    6.1  47.6 -161.9   0.4313   1.9    8.8	HT1900.1-2455                 
288.8374  10.9391    1.9  13.6 -134.0   0.6383   5.9    2.3	GRS 1915+105                  
299.5910  35.2058    0.3  14.4    4.6   4.6545  45.7    0.3	Cyg X-1                       
308.0965  40.8043    5.5  21.5   21.2   0.2428   2.1    8.9	Cyg X-3                       
326.1946  38.4118    6.2  29.5   48.7   0.2871   1.9    5.5	Cyg X-2                       
286.0598 -32.7340    2.5  54.9 -165.9   1.6010   4.7 ------	UNKNOWN                       
258.1368   6.5059    2.8  41.7 -103.0   1.9673   4.1 ------	UNKNOWN

Pre-slew background subtracted image of 15-350 keV band

Time interval of the image:
0.000000 0.256000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.5669  35.5398    0.0  41.1  -58.1   0.0197   1.6   13.0	Her X-1                       
268.2384  -1.5262    7.2  37.2 -122.1  -0.0145  -1.6    8.9	SW J1753.5-0127               
270.2325 -25.1049    5.7  53.6 -146.5  -0.0451  -2.0    3.2	GX 5-1                        
270.3183 -25.8332   13.2  54.2 -147.0  -0.0202  -0.9    5.5	GRS 1758-258                  
274.1082 -14.0569    3.9  42.4 -142.2  -0.0278  -2.9    6.1	GX 17+2                       
275.7733 -30.2500   10.2  55.6 -154.8  -0.0233  -1.1   10.5	H1820-303                     
285.0727 -24.9513   18.1  47.7 -162.1  -0.0064  -0.6    2.7	HT1900.1-2455                 
288.9056  11.0993    9.8  13.5 -133.7  -0.0060  -1.2   11.2	GRS 1915+105                  
299.5433  35.2069    2.8  14.4    4.4   0.0193   4.1    2.3	Cyg X-1                       
307.9167  40.8163    0.0  21.5   20.8  -0.0035  -0.7   12.0	Cyg X-3                       
326.0805  38.2110    9.2  29.4   49.0   0.0088   1.3    7.9	Cyg X-2                       
301.1591  21.6845    2.1   2.5   72.0   0.0267   5.6 ------	UNKNOWN                       
290.3990  54.9763    2.1  34.7   -7.0   0.0320   5.5 ------	UNKNOWN                       
251.1115  61.5810    1.8  52.1  -25.1   0.0866   6.5 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
44.620590 963.000000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.3758  35.3615   25.9  42.7  -52.1   0.7095   0.4    4.2	Her X-1                       
268.3472  -1.5792    3.7  39.5 -113.2   4.4914   3.1    7.7	SW J1753.5-0127               
274.0276 -14.0341    4.3  44.5 -132.4   3.4222   2.7    1.3	GX 17+2                       
285.0683 -24.9632    4.7  49.2 -152.1   3.0508   2.4    3.1	HT1900.1-2455                 
288.7904  10.9727    1.2  15.9 -121.9   5.1129   9.9    1.7	GRS 1915+105                  
299.5938  35.2018    0.1  13.6    3.8  37.3058  81.8    0.2	Cyg X-1                       
308.0937  40.9630    1.8  20.2   24.4   3.4048   6.4    1.0	Cyg X-3                       
326.3558  38.3026    7.0  27.4   55.7   1.1819   1.7    8.7	Cyg X-2                       
336.5044  10.9429    3.1  35.6  110.5   4.5274   3.7 ------	UNKNOWN                       
327.9474  22.5630    2.6  24.9   91.6   3.1121   4.4 ------	UNKNOWN                       
313.2206 -20.1721    2.4  43.5  172.0   4.4068   4.8 ------	UNKNOWN                       
312.2196 -31.3956    3.8  54.2  176.9   6.0409   3.0 ------	UNKNOWN

Plot creation:
Wed Feb 17 01:49:28 EST 2010