batgrbproduct analysis for trigger=340973

batgrbproduct Analysis for Trigger=340973

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 v2.42
    Process Start Time (local time): Sat Jan 24 10:05:43 EST 2009
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger340973/GCN5_download_cron
======================================================================

  Trigger: 00340973      Segment: 000

  BAT Trigger Time: 254451984   [s; MET]
      Trigger Stop: 254452048   [s; MET]
               UTC: 2009-01-24T01:06:19.559120    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 170.291582453064   Dec: -61.9049982688932  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.23
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    7.23

  Flight Position:   [ source = BAT ]
    RA: 170.291582453064   Dec: -61.9049982688932  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 170.210589365271   Dec: -61.888985758676  [deg; J2000]  
        { 11h 20m 50.5s , -61d 53' 20.3" }
         +/- 2.78431066915748 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.54545045151978 [arcmin] (formal 1-sigma fit error)
    SNR: 7.04380609552532
 
  Angular difference between Flight and Ground position is 2.482587 arcmin
 
  Partial Coding Fraction: 0.703125    [ including projection effects ]

  Duration
     T90: 152.247999995947 +/- 62.1529886606234
        Measured from: -35.4679999053478
                   to: 116.780000090599     [s; relative to TRIGTIME]
     T50: 73.4359999895096 +/- 69.3601450949199
        Measured from: -8.83599990606308
                   to: 64.6000000834465     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -35.5879999995232     
                   to: -34.5879999995232     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -40.4959999918938     
                   to: 117.772000014782     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.654376   0.579193  -0.006366   0.079058
           0.085362   0.082468   0.073875   0.071025 [error]
 Peak      0.015792   0.017533   0.015285   0.014468
           0.009541   0.009729   0.008194   0.007937 [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 2.17e-07 1.95e-07 1.20e-07 1.13e-07 5.80e-07 6.45e-07   erg/cm2
              Error 4.07e-08 4.19e-08 5.08e-08 8.68e-08 1.28e-07 1.77e-07   erg/cm2
Peak flux Power-law 1.00e-01 8.37e-02 1.08e-01 1.16e-01 2.23e-01 3.80e-01   ph/cm2/s
              Error 8.74e-02 8.91e-02 3.31e-01 2.16e-01 3.32e-01 0.00e+00   ph/cm2/s
 
Fluence   Cutoff-PL 2.12e-07 2.48e-07 2.73e-08 5.94e-11 4.87e-07 4.87e-07   erg/cm2
              Error 4.58e-08 5.89e-08 3.38e-08 1.95e-09 8.99e-08 8.99e-08   erg/cm2
Peak flux Cutoff-PL 1.00e-01 1.23e-01 1.09e-01 1.65e-01 3.90e-01 4.97e-01   ph/cm2/s
              Error 1.20e-01 1.02e-01 8.81e-02 3.45e-01 3.09e-01 3.31e-01   ph/cm2/s
 
Fluence        Band 2.22e-07 2.39e-07 2.27e-08 2.56e-10 4.81e-07 5.26e-07   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 1.23e-01 1.23e-01 1.09e-01 1.64e-01 3.90e-01 4.71e-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    2.696    0.376    -      -           3.44e-04 1.10e-04   54.080 57
CPL  -2.616    0.387      25.7    4.8      1.72e+00 0.00e+00   44.200 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.174    1.421    -      -           3.33e-03 1.97e-03   55.880 57
CPL   1.209    2.008    9999.4    0.0      3.35e-03 6.00e-02   55.880 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  158.268  -40.496  117.772
T90   152.248  -35.468  116.780
T50    73.436   -8.836   64.600
Peak    1.000  -35.588  -34.588

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
  170.2106 -61.8890 0.0272   25.9  -53.1       1.0047     7.0  TRIG_00340973       
------------------------------------------
 
Foreground time interval of the image:
 -7.899 117.772 (delta_t = 125.671 [sec])
Background time interval of the image:

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 64.000000

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 64.000000

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 64.000000

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

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

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  -40.496 sec. to  117.772 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.69609     ( -0.34861   0.402415 )
Norm@50keV  : 3.44148E-04    ( -0.000107101   0.000112328 )
------------------------------------------------------------
# Chi-Squared =          54.08 using 59 PHA bins.
# Reduced chi-squared =         0.9487 for     57 degrees of freedom 
# Null hypothesis probability =   5.854688e-01
 
Photon flux (15-150 keV)    in 158.3 sec: 7.67358E-02 ( -0.0130513  0.013081 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.79547e-07 ( -1.23614e-07  1.3303e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -40.496 sec. to  117.772 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.61603     ( 1.52528   2.29833 )
Epeak [keV] : 25.6767      ( -5.44666 4.23866 )
Norm@50keV  : 1.71845    (     )
------------------------------------------------------------
# Chi-Squared =          44.20 using 59 PHA bins.
# Reduced chi-squared =         0.7893 for     56 degrees of freedom 
# Null hypothesis probability =   8.729393e-01
 
Photon flux (15-150 keV)    in 158.3 sec: 7.44009E-02 ( -0.0121756  0.0124421 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.87007e-07 ( -8.57685e-08  9.40476e-08 ) ergs/cm2

Band function

Time interval is from  -40.496 sec. to  117.772 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 2.66296   ( -17.2955   -7.44587 )
beta        : -8.98988    ( 9.99999   19.9885 )
Epeak [keV] : 25.8504      ( -2.94598 3.06957 )
Norm@50keV   : 1.80330    ( -1.80345   50.2776 )
------------------------------------------------------------
# Chi-Squared =          44.21 using 59 PHA bins.
# Reduced chi-squared =         0.8038 for     55 degrees of freedom 
# Null hypothesis probability =   8.508663e-01
 
Photon flux (15-150 keV)    in 158.3 sec: 7.310624E-02 ( -0.0117065  0.0117082 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.81286e-07 ( -8.07045e-08  1.00378e-07 ) ergs/cm2

Peak spectrum fit

Power-law model

Time interval is from  -35.588 sec. to  -34.588 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.17415     ( -1.60043   1.24219 )
Norm@50keV  : 3.33373E-03    ( -0.002111   0.00183304 )
------------------------------------------------------------
# Chi-Squared =          55.88 using 59 PHA bins.
# Reduced chi-squared =         0.9803 for     57 degrees of freedom 
# Null hypothesis probability =   5.172885e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.380292 ( -0.205581  0.226012 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.40749e-08 ( -2.03627e-08  2.11555e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from  -35.588 sec. to  -34.588 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.20908     ( -1.6554   2.35996 )
Epeak [keV] : 9999.36      ( -9999.95 -9999.95 )
Norm@50keV  : 3.35163E-03    ( -0.00335152   0.116746 )
------------------------------------------------------------
# Chi-Squared =          55.88 using 59 PHA bins.
# Reduced chi-squared =         0.9979 for     56 degrees of freedom 
# Null hypothesis probability =   4.793003e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.389744 ( -0.389744  0.227789 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.40761e-08 ( -2.03707e-08  2.11692e-08 ) ergs/cm2

Band function

Time interval is from  -35.588 sec. to  -34.588 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.99133   ( -222.191   -222.191 )
beta        : -1.16131    ( -1.87649   1.56733 )
Epeak [keV] : 21.7132      ( -21.6578 88.8732 )
Norm@50keV   : 582.117    ( -606.389   29611.1 )
------------------------------------------------------------
# Chi-Squared =          55.82 using 59 PHA bins.
# Reduced chi-squared =          1.015 for     55 degrees of freedom 
# Null hypothesis probability =   4.439535e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.390103 ( -0.390103  0.228852 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.05496e-07 ( -1.05496e-07  6.72949e-06 ) 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: 2.57281     ( -0.356628   0.411101 )
Norm@50keV  : 3.75251E-04    ( -0.00011707   0.000120879 )
------------------------------------------------------------
# Chi-Squared =          59.89 using 59 PHA bins.
# Reduced chi-squared =          1.051 for     57 degrees of freedom 
# Null hypothesis probability =   3.713186e-01
 
Photon flux (15-150 keV)    in 125.7 sec: 7.71403E-02 ( -0.0138222  0.0138515 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.81567e-07 ( -1.08437e-07  1.16733e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.48543     ( 1.39724   2.47197 )
Epeak [keV] : 26.1197      ( -4.98511 4.54759 )
Norm@50keV  : 1.26564    (     )
------------------------------------------------------------
# Chi-Squared =          52.25 using 59 PHA bins.
# Reduced chi-squared =         0.9331 for     56 degrees of freedom 
# Null hypothesis probability =   6.174729e-01
 
Photon flux (15-150 keV)    in 125.7 sec: 7.39709E-02 ( -0.0128652  0.0131954 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.89551e-07 ( -7.36665e-08  8.47381e-08 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 2.12324   ( -1.54054   -0.803825 )
beta        : -9.99812    ( 1689.23   1698.89 )
Epeak [keV] : 25.9303      ( -7.44429 4.73761 )
Norm@50keV   : 0.705485    ( -0.643183   31.4104 )
------------------------------------------------------------
# Chi-Squared =          52.21 using 59 PHA bins.
# Reduced chi-squared =         0.9493 for     55 degrees of freedom 
# Null hypothesis probability =   5.818576e-01
 
Photon flux (15-150 keV)    in 125.7 sec: 7.616794E-02 ( -0.0132211  0.0132215 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.28193e-07 ( -7.83802e-08  1.08084e-07 ) ergs/cm2

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

S(25-50 keV)  = 1.94641e-07
S(50-100 keV) = 1.20063e-07

T90 vs. Hardness ratio plot

T90                                   = 152.247999995947 sec.
Hardness ratio (energy fluence ratio) = 0.616843

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 0.885107
Count Ratio (50-100 keV) / (15-25 keV) = -0.00972835

Mask shadow pattern

IMX = 2.915985051109055E-01, IMY = 3.888831795692195E-01

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000

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:

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

Time interval of the image:
-7.899410 117.772000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.5106 -40.5139    1.9  28.3   15.5   0.8734   6.2    2.6	Vela X-1                      
170.2405 -60.6277    3.6  24.7  -53.1   0.4333   3.2    2.2	Cen X-3                       
186.6693 -62.7652    0.6  28.4  -69.1   3.3049  18.8    0.5	GX 301-2                      
142.2248 -37.2154    2.8  23.3   23.9   0.5107   4.2 ------	UNKNOWN                       
200.2710 -35.0680    2.3  23.5 -138.0   0.6742   5.1 ------	UNKNOWN                       
170.2104 -61.8889    1.6  25.9  -53.1   1.0047   7.1 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
355.400620 573.780000
575.000000 963.042900
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
170.2024 -60.4948    4.5  35.2   47.5   2.0063   2.6    8.4	Cen X-3                       
186.6508 -62.7655    0.4  27.1   46.7  15.4641  29.3    0.3	GX 301-2                      
244.9674 -15.6394    0.4  39.1 -173.5  17.0783  31.7    0.7	Sco X-1                       
255.9393 -37.8723    2.1  20.6 -140.1   2.4151   5.4    2.8	4U 1700-377                   
256.2655 -36.3391    3.7  22.1 -141.6   1.3879   3.1    9.6	GX 349+2                      
262.9884 -24.6794    2.6  35.1 -142.1   2.3505   4.4    4.1	GX 1+4                        
264.7458 -44.4413   70.6  20.0 -113.0  -0.0665  -0.2    0.5	4U 1735-44                    
270.3296 -25.1215    3.8  37.8 -131.9   2.5336   3.0    3.5	GX 5-1                        
270.2097 -25.8952    0.0  37.1 -131.4  -0.3678  -0.5   10.4	GRS 1758-258                  
274.0036 -13.9090    5.3  49.3 -135.4   4.6368   2.2    7.6	GX 17+2                       
276.0177 -30.3946    3.9  36.3 -120.1   2.1245   3.0    5.1	H1820-303                     
101.1566 -69.1632    2.9  52.5   13.4   6.0901   3.9 ------	UNKNOWN                       
243.4319 -11.6035    2.6  42.9 -176.4   2.8134   4.4 ------	UNKNOWN                       
269.6460 -35.9587    4.6  28.6 -121.3   1.2271   2.5 ------	UNKNOWN                       
327.4190 -56.6951    3.3  47.1  -53.1   8.0591   3.5 ------	UNKNOWN

Plot creation:
Tue Feb 16 23:52:38 EST 2010