batgrbproduct analysis for trigger=263361

batgrbproduct Analysis for Trigger=263361

Analysis Summary

Notes:

1) No attempt has been made to eliminate the non-significant decimal places.
2) This batgrbproduct analysis is done using the HEASARC data.
3) This batgrbproduct analysis is using the flight position for the mask-weighting calculation.

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Mon Jan 20 11:14:34 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger263361
======================================================================

  Trigger: 00263361      Segment: 000

  BAT Trigger Time: 194892089.984   [s; MET]
      Trigger Stop: 194892102.144   [s; MET]
               UTC: 2007-03-06T16:41:28.177300    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 148.081830318346   Dec: 10.4713881166989  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9.85
     Image Trigger?:     NO
     Rate S/N Ratio:     13.3041346956501  [ if not an image trigger ]
     Image S/N Ratio:    9.85

  Flight Position:   [ source = BAT ]
    RA: 148.081830318346   Dec: 10.4713881166989  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 148.082   Dec: 10.4714  [deg; J2000]
        { 09h 52m 19.7s , +10d 28' 17.0" }
        +/- 1.86583816617 [arcmin] (estimated 90% radius based on SNR)
    SNR: 12.4799366243
 
 
  Angular difference between Flight and Ground position is 0.010037 arcmin
 
  Partial Coding Fraction: 0.2851562    [ including projection effects ]

  Duration
     T90: 209.243999987841 +/- 64.6099401058841
        Measured from: -61.6999999880791
                   to: 147.543999999762     [s; relative to TRIGTIME]
     T50: 21.9160000085831 +/- 41.1730326057894
        Measured from: 83.8479999899864
                   to: 105.763999998569     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 98.2680000066757     
                   to: 99.2680000066757     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -118.840000003576     
                   to: 185.256000012159     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     2.795082   3.514344   2.287480   0.560661
           0.133614   0.139057   0.121328   0.104181 [error]
 Peak      0.140420   0.183699   0.142982   0.023604
           0.007149   0.008023   0.007169   0.005038 [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 8.42e-07 1.43e-06 1.85e-06 4.85e-06 5.46e-06 8.98e-06   erg/cm2
              Error 7.06e-08 7.02e-08 1.22e-07 7.02e-07 2.87e-07 7.90e-07   erg/cm2
Peak flux Power-law 1.38e+00 1.35e+00 9.30e-01 1.01e+00 4.06e+00 4.67e+00   ph/cm2/s
              Error 1.19e-01 7.07e-02 5.96e-02 1.33e-01 2.04e-01 2.30e-01   ph/cm2/s
 
Fluence   Cutoff-PL 8.43e-07 1.43e-06 1.85e-06 4.80e-06 5.45e-06 8.93e-06   erg/cm2
              Error 7.18e-08 6.82e-08 1.23e-07 1.00e-06 2.19e-07 1.22e-06   erg/cm2
Peak flux Cutoff-PL 1.29e+00 1.39e+00 9.57e-01 6.79e-01 3.99e+00 4.32e+00   ph/cm2/s
              Error 1.45e-01 8.17e-02 6.67e-02 2.63e-01 2.15e-01 3.47e-01   ph/cm2/s
 
Fluence        Band -------- -------- -------- -------- -------- --------   erg/cm2
              Error -------- -------- -------- -------- -------- --------   erg/cm2
Peak flux      Band -------- -------- -------- -------- -------- --------   ph/cm2/s
              Error -------- -------- -------- -------- -------- --------   ph/cm2/s

 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.627    0.090    -      -           1.92e-03 9.39e-05   55.130 57
CPL   1.628    0.090    9999.4    0.0      1.93e-03 4.93e-04   55.140 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.541    0.088    -      -           3.22e-02 1.62e-03   29.980 57
CPL   1.188    0.354     116.7  455.8      4.83e-02 1.99e-02   26.820 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: 128.128000 sec.
T50 in the 50-300 keV band: 16.512000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  304.096 -118.840  185.256
T90   209.244  -61.700  147.544
T50    21.916   83.848  105.764
Peak    1.000   98.268   99.268

Click here for the BAT GCN circular template

Special notes of this burst

Image

Pre-slew 25.0-100.0 keV image (Event data)

#RAcent DECcent POSerr Theta  Phi  Peak_Cts  SNR Name
148.082 10.471 0.000 33.013 106.315 0.581 12.480 TRIG_00263361
 
Image time interval: 0.000 to 12.160 [sec]

Lightcurves

Notes:

1) The mask-weighted light curves are using the flight position.
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

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)

Spectral Evolution

Spectra

Notes:

1) The fitting includes the systematic errors.
2) When the burst includes telescope slew time periods, the fitting uses an average response file made from multiple 5-s response files through out the slew time plus single time preiod for the non-slew times, and weighted by the total counts in the corresponding time period using addrmf. An average response file is needed becuase a spectral fit using 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.

Time averaged spectrum fit using the average DRM

Power-law model

Time interval is from -118.840 sec. to  185.256 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.62699     ( -0.089352   0.0899041 )
Norm@50keV  : 1.92461E-03    ( -9.41208e-05   9.37225e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.13 using 59 PHA bins.
# Reduced chi-squared =         0.9672 for     57 degrees of freedom 
# Null hypothesis probability =   5.456263e-01
 
Photon flux (15-150 keV)    in 304.1 sec: 0.249434 ( -0.012141  0.0121734 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.45647e-06 ( -2.85986e-07  2.8762e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from -118.840 sec. to  185.256 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.62800     ( -0.0918465   0.0883861 )
Epeak [keV] : 9999.36      ( -9999.36 -9999.36 )
Norm@50keV  : 1.92631E-03    ( -0.000351667   0.000634779 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.14 using 59 PHA bins.
# Reduced chi-squared =         0.9847 for     56 degrees of freedom 
# Null hypothesis probability =   5.073301e-01
 
Photon flux (15-150 keV)    in 304.1 sec: 0.249348 ( -0.012138  0.012132 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.45434e-06 ( -1.53175e-07  2.83969e-07 ) ergs/cm2

Band function

Time interval is from -118.840 sec. to  185.256 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 2.86921   ( -2.86911   -2.86911 )
beta        : -1.65590    ( -0.111597   0.0958131 )
Epeak [keV] : 22.9542      ( -22.9526 76.2473 )
Norm@50keV   : 8.42177    ( -8.41895   201.088 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.29 using 59 PHA bins.
# Reduced chi-squared =         0.9871 for     55 degrees of freedom 
# Null hypothesis probability =   5.016833e-01
 
Photon flux (15-150 keV)    in 304.1 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

Single BB

 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 13.3704  (  )
R^2/D10^2   : 3.96169E-02  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         177.61 using 59 PHA bins.
# Reduced chi-squared =         3.1159 for     57 degrees of freedom 
# Null hypothesis probability =   2.596574e-14
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.564e-07   4.090e-08
25- 50  1.620e-06   9.260e-08
50-150  1.860e-06   1.948e-07
15-150  3.936e-06   2.357e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 171.922       (-39.7138      -171.658)
Norm        : 1.00838       (-0.0535133     0.0596296)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.62 using 59 PHA bins.
# Reduced chi-squared =          1.046 for     57 degrees of freedom 
# Null hypothesis probability =   3.807222e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.773e-07   5.231e-08
25- 50  1.468e-06   1.583e-07
50-150  3.057e-06   1.070e-06
15-150  5.302e-06   1.244e-06

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.90191        (-1.10012      1.12625)
R1^2/D10^2  : 0.202389        (-0.0713564      0.132115)
kT2 [keV]   : 36.3363        (-8.82191      18.8267)
R2^2/D10^2  : 9.58836E-04    (-0.000648063   0.00140988)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.89 using 59 PHA bins.
# Reduced chi-squared =          1.053 for     55 degrees of freedom 
# Null hypothesis probability =   3.691037e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.416e-07   9.032e-08
25- 50  1.531e-06   1.954e-07
50-150  3.268e-06   1.057e-06
15-150  5.541e-06   1.165e-06

Peak spectrum fit

Power-law model

Time interval is from   98.268 sec. to   99.268 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.54116     ( -0.0873864   0.0882144 )
Norm@50keV  : 3.21882E-02    ( -0.00162551   0.00162026 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          29.98 using 59 PHA bins.
# Reduced chi-squared =         0.5260 for     57 degrees of freedom 
# Null hypothesis probability =   9.987908e-01
 
Photon flux (15-150 keV)    in 1 sec: 4.06448 ( -0.203435  0.203661 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.03411e-07 ( -1.66987e-08  1.67824e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   98.268 sec. to   99.268 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.18761     ( -0.367936   0.340233 )
Epeak [keV] : 116.730      ( -35.9346 875.573 )
Norm@50keV  : 4.82613E-02    ( -0.0152386   0.0245655 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          26.82 using 59 PHA bins.
# Reduced chi-squared =         0.4790 for     56 degrees of freedom 
# Null hypothesis probability =   9.996682e-01
 
Photon flux (15-150 keV)    in 1 sec: 3.99083 ( -0.21486  0.21484 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.95825e-07 ( -1.8433e-08  1.8386e-08 ) ergs/cm2

Band function

Time interval is from   98.268 sec. to   99.268 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.17186   ( -0.220938   3.83858 )
beta        : -2.10267    ( 2.01655   0.484057 )
Epeak [keV] : 114.250      ( -85.1208 364.642 )
Norm@50keV   : 4.90589E-02    ( -0.0159472   0.457994 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          26.81 using 59 PHA bins.
# Reduced chi-squared =         0.4874 for     55 degrees of freedom 
# Null hypothesis probability =   9.995153e-01
 
Photon flux (15-150 keV)    in 1 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.95243e-07 ( 0  0 ) ergs/cm2

Single BB

 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 14.9346  (-0.938758  1.00701)
R^2/D10^2   : 0.460430  (-0.0945072   0.118224)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         112.24 using 59 PHA bins.
# Reduced chi-squared =         1.9691 for     57 degrees of freedom 
# Null hypothesis probability =   1.776087e-05
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.152e-08   2.145e-09
25- 50  8.515e-08   5.360e-09
50-150  1.290e-07   1.350e-08
15-150  2.357e-07   1.455e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-40.0048      -200)
Norm        : 16.5373       (-0.804341     0.804341)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          27.13 using 59 PHA bins.
# Reduced chi-squared =         0.4760 for     57 degrees of freedom 
# Null hypothesis probability =   9.997320e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.122e-08   2.305e-09
25- 50  7.930e-08   4.490e-09
50-150  1.739e-07   2.880e-08
15-150  2.944e-07   1.750e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.20975        (-1.10783      1.29663)
R1^2/D10^2  : 5.96674        (-2.84125      6.51898)
kT2 [keV]   : 23.1219        (-2.8658      4.15278)
R2^2/D10^2  : 8.12793E-02    (-0.0376594   0.0532668)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          27.75 using 59 PHA bins.
# Reduced chi-squared =         0.5045 for     55 degrees of freedom 
# Null hypothesis probability =   9.991960e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.992e-08   7.810e-09
25- 50  7.717e-08   9.725e-09
50-150  1.743e-07   2.820e-08
15-150  2.914e-07   4.050e-08

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: 1.48721     ( -0.288408   0.288176 )
Norm@50keV  : 8.24465E-04    ( -0.000134716   0.000133173 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.12 using 59 PHA bins.
# Reduced chi-squared =         0.8618 for     57 degrees of freedom 
# Null hypothesis probability =   7.617154e-01
 
Photon flux (15-150 keV)    in 178 sec: 0.102575 ( -0.016449  0.0164981 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.39515e-06 ( -2.49439e-07  2.53367e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.49340     ( -0.728201   0.282399 )
Epeak [keV] : 9999.36      ( -9999.36 -9999.36 )
Norm@50keV  : 8.22848E-04    ( -0.000134165   0.00113445 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.13 using 59 PHA bins.
# Reduced chi-squared =         0.8773 for     56 degrees of freedom 
# Null hypothesis probability =   7.303754e-01
 
Photon flux (15-150 keV)    in 178 sec: 0.102785 ( -0.0166967  0.01629 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.39486e-06 ( -2.49236e-07  2.47123e-07 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.90988   ( -4.90988   -4.90988 )
beta        : -1.59870    ( -0.423901   0.334101 )
Epeak [keV] : 25.3342      ( -25.3342 7.30283 )
Norm@50keV   : 69.6243    ( -10.902   490944 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.55 using 59 PHA bins.
# Reduced chi-squared =         0.8826 for     55 degrees of freedom 
# Null hypothesis probability =   7.180336e-01
 
Photon flux (15-150 keV)    in 178 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

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

S(25-50 keV)  = 1.43e-06
S(50-100 keV) = 1.85e-06

T90 vs. Hardness ratio plot

T90                                   = 209.243999987841 sec.
Hardness ratio (energy fluence ratio) = 1.29371

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.25733
Count Ratio (50-100 keV) / (15-25 keV) = 0.818395

Mask shadow pattern

IMX = -0.182518282055, IMY = -0.623577896889

TIME vs. PHA plot around the trigger time

TIME vs. DetID plot around the trigger time

100 us light curve (15-350 keV)

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:
-239.984000 -118.840000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
104.5188   9.1753    2.5  54.4  162.8   2.3386   4.6 ------	UNKNOWN                       
188.5642  43.4297    2.3  25.4   -6.3   0.5187   4.9 ------	UNKNOWN                       
210.9770  41.2651    2.6  41.8  -11.4   0.6883   4.5 ------	UNKNOWN                       
110.9201  43.5115    2.9  30.6 -157.8   0.4698   4.0 ------	UNKNOWN                       
217.6970  62.3812    2.7  41.1  -44.1   0.7989   4.2 ------	UNKNOWN                       
 92.7101  75.5654    3.6  41.3 -102.7   1.6746   3.2 ------	UNKNOWN

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

Time interval of the image:
-118.840000 59.116590
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
148.1438  10.4432    1.7  33.0  106.2   2.2801   6.7 ------	UNKNOWN                       
163.5123  32.2348    2.5  13.5   57.3   0.8419   4.7 ------	UNKNOWN                       
144.6906  61.8465    2.3  19.4  -96.0   1.0974   5.1 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
140.916590 864.816600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.5891 -40.5244    8.4  52.3  178.9   1.4626   1.4    3.3	Vela X-1                      
150.6606  -4.6395    2.9  15.4  157.0   1.2084   4.0 ------	UNKNOWN

Plot creation:
Tue Nov 10 17:15:10 EST 2015