batgrbproduct analysis for trigger=321376

batgrbproduct Analysis for Trigger=321376

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 Oct  5 16:00:23 EDT 2015
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger321376
======================================================================

  Trigger: 00321376      Segment: 000

  BAT Trigger Time: 241131776   [s; MET]
      Trigger Stop: 241131840   [s; MET]
               UTC: 2008-08-22T21:02:52.960620    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 63.4950367894906   Dec: 25.7428354460579  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.15
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    7.15

  Flight Position:   [ source = BAT ]
    RA: 63.4950367894906   Dec: 25.7428354460579  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 63.5747866237436   Dec: 25.7525932386815  [deg; J2000]  
        { 04h 14m 17.9s , +25d 45' 09.3" }
         +/- 3.63290421967785 [arcmin] (estimated 90% radius based on SNR)
         +/- 2.01333263860206 [arcmin] (formal 1-sigma fit error)
    SNR: 4.81676653779285
 
  Angular difference between Flight and Ground position is 4.349499 arcmin
 
  Partial Coding Fraction: 0.8203125    [ including projection effects ]

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

    WARNING: battblocks failed.  Used TDRSS fore/background intervals

======================================================================
 
=== 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 5.81e-08 6.11e-08 4.55e-08 5.50e-08 1.86e-07 2.22e-07   erg/cm2
              Error 1.35e-08 1.95e-08 2.58e-08 6.61e-08 6.56e-08 1.01e-07   erg/cm2
Peak flux Power-law 2.98e-02 1.75e-02 6.52e-03 3.23e-03 5.55e-02 5.71e-02   ph/cm2/s
              Error 9.13e-03 5.40e-03 3.58e-03 3.67e-03 1.53e-02 1.60e-02   ph/cm2/s
 
Fluence   Cutoff-PL 5.23e-08 9.58e-08 2.02e-08 1.29e-10 1.68e-07 1.68e-07   erg/cm2
              Error 2.09e-08 3.02e-08 2.54e-08 2.81e-09 4.80e-08 4.80e-08   erg/cm2
Peak flux Cutoff-PL 2.57e-02 2.76e-02 3.32e-03 1.17e-05 5.66e-02 5.66e-02   ph/cm2/s
              Error 1.08e-02 8.43e-03 3.89e-03 2.31e-04 1.45e-02 1.45e-02   ph/cm2/s
 
Fluence        Band 5.21e-08 9.44e-08 2.10e-08 3.04e-10 1.73e-07 1.73e-07   erg/cm2
              Error 2.07e-08 3.02e-08 -------- 1.32e-08 -------- --------   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    2.411    0.512    -      -           2.99e-04 1.28e-04   70.640 57
CPL  -1.997    4.187      31.0    7.1      2.20e-01 7.18e+02   62.340 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.411    0.512    -      -           2.99e-04 1.28e-04   70.640 57
CPL  -1.997    4.187      31.0    7.1      2.20e-01 7.18e+02   62.340 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     N/A      N/A     N/A
T90      N/A      N/A     N/A
T50      N/A      N/A     N/A
Peak     N/A      N/A     N/A

Click here for the BAT GCN circular template

Image

Pre-slew 15.0-350.0 keV image (Event data)

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
   63.5748    25.7526   0.0398    21.6569    28.6219         0.3951002      4.817 TRIG_00321376                 
 
Foreground time interval of the image:
  0.000  64.000 (delta_t =  64.000 [sec])
Background time interval of the image:

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    0.000 sec. to   64.000 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.41122     ( -0.465323   0.559451 )
Norm@50keV  : 2.98582E-04    ( -0.000126746   0.000129919 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          70.64 using 59 PHA bins.
# Reduced chi-squared =          1.239 for     57 degrees of freedom 
# Null hypothesis probability =   1.057888e-01
 
Photon flux (15-150 keV)    in 64 sec: 5.55432E-02 ( -0.0152306  0.0154248 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.85734e-07 ( -6.24991e-08  6.86867e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.000 sec. to   64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.99668     ( -5.62582   2.74763 )
Epeak [keV] : 30.9632      ( -7.41392 6.77691 )
Norm@50keV  : 0.219783    ( -0.261598   1435.07 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.34 using 59 PHA bins.
# Reduced chi-squared =          1.113 for     56 degrees of freedom 
# Null hypothesis probability =   2.608703e-01
 
Photon flux (15-150 keV)    in 64 sec: 5.65672E-02 ( -0.0144595  0.0145552 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.68353e-07 ( -4.59482e-08  4.99674e-08 ) ergs/cm2

Band function

Time interval is from    0.000 sec. to   64.000 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 1.97362   ( -2.61597   -1.8792 )
beta        : -10.0000    ( 10   10 )
Epeak [keV] : 30.9621      ( -7.56036 6.8122 )
Norm@50keV   : 0.212810    ( -0.212868   21.8799 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.35 using 59 PHA bins.
# Reduced chi-squared =          1.134 for     55 degrees of freedom 
# Null hypothesis probability =   2.312208e-01
 
Photon flux (15-150 keV)    in 64 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.72987e-07 ( 0  0 ) ergs/cm2

Single BB

 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 7.91494  (-1.57484  1.84495)
R^2/D10^2   : 7.52970E-02  (-0.0434162   0.105416)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.40 using 59 PHA bins.
# Reduced chi-squared =          1.095 for     57 degrees of freedom 
# Null hypothesis probability =   2.903993e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.415e-08   2.820e-08
25- 50  9.303e-08   5.231e-08
50-150  2.358e-08   1.661e-08
15-150  1.708e-07   7.849e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 31.8866       (-12.718      24.9327)
Norm        : 0.450555       (-0.168209     0.270358)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.56 using 59 PHA bins.
# Reduced chi-squared =          1.168 for     57 degrees of freedom 
# Null hypothesis probability =   1.810575e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.047e-08   2.697e-08
25- 50  7.140e-08   3.572e-08
50-150  4.230e-08   3.371e-08
15-150  1.742e-07   8.853e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.11129        (-7.32899      -7.32899)
R1^2/D10^2  : 2.21260E-03        (-0.00215116      -0.00215116)
kT2 [keV]   : 7.97130        (-7.96072      -7.96072)
R2^2/D10^2  : 7.18661E-02    (-0.0718629   -0.0718629)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.40 using 59 PHA bins.
# Reduced chi-squared =          1.135 for     55 degrees of freedom 
# Null hypothesis probability =   2.299472e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.388e-08   7.629e-04
25- 50  9.332e-08   5.837e-03
50-150  2.408e-08   1.396e-01
15-150  1.713e-07   1.498e-01

Peak spectrum fit

Power-law model

Time interval is from    0.000 sec. to   64.000 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.41122     ( -0.465323   0.559451 )
Norm@50keV  : 2.98582E-04    ( -0.000126746   0.000129919 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          70.64 using 59 PHA bins.
# Reduced chi-squared =          1.239 for     57 degrees of freedom 
# Null hypothesis probability =   1.057888e-01
 
Photon flux (15-150 keV)    in 64 sec: 5.55432E-02 ( -0.0152306  0.0154248 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.85734e-07 ( -6.24991e-08  6.86867e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.000 sec. to   64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.99668     ( -5.62582   2.74763 )
Epeak [keV] : 30.9632      ( -7.41392 6.77691 )
Norm@50keV  : 0.219783    ( -0.261598   1435.07 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.34 using 59 PHA bins.
# Reduced chi-squared =          1.113 for     56 degrees of freedom 
# Null hypothesis probability =   2.608703e-01
 
Photon flux (15-150 keV)    in 64 sec: 5.65672E-02 ( -0.0144595  0.0145552 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.68353e-07 ( -4.59482e-08  4.99674e-08 ) ergs/cm2

Band function

Time interval is from    0.000 sec. to   64.000 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 1.97362   ( -2.61597   -1.8792 )
beta        : -10.0000    ( 10   10 )
Epeak [keV] : 30.9621      ( -7.56036 6.8122 )
Norm@50keV   : 0.212810    ( -0.212868   21.8799 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.35 using 59 PHA bins.
# Reduced chi-squared =          1.134 for     55 degrees of freedom 
# Null hypothesis probability =   2.312208e-01
 
Photon flux (15-150 keV)    in 64 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.72987e-07 ( 0  0 ) ergs/cm2

Single BB

 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 7.91494  (-1.57484  1.84495)
R^2/D10^2   : 7.52970E-02  (-0.0434162   0.105416)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.40 using 59 PHA bins.
# Reduced chi-squared =          1.095 for     57 degrees of freedom 
# Null hypothesis probability =   2.903993e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.415e-08   2.846e-08
25- 50  9.303e-08   4.546e-08
50-150  2.358e-08   1.645e-08
15-150  1.708e-07   7.650e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 31.8866       (-12.718      24.9327)
Norm        : 0.450555       (-0.168209     0.270358)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.56 using 59 PHA bins.
# Reduced chi-squared =          1.168 for     57 degrees of freedom 
# Null hypothesis probability =   1.810575e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.047e-08   2.765e-08
25- 50  7.140e-08   3.943e-08
50-150  4.230e-08   3.552e-08
15-150  1.742e-07   9.318e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.11129        (-7.32899      -7.32899)
R1^2/D10^2  : 2.21260E-03        (-0.00215116      -0.00215116)
kT2 [keV]   : 7.97130        (-7.96072      -7.96072)
R2^2/D10^2  : 7.18661E-02    (-0.0718629   -0.0718629)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.40 using 59 PHA bins.
# Reduced chi-squared =          1.135 for     55 degrees of freedom 
# Null hypothesis probability =   2.299472e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.388e-08   7.581e-04
25- 50  9.332e-08   5.952e-03
50-150  2.408e-08   1.491e-01
15-150  1.713e-07   1.614e-01

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: 2.41122     ( -0.465323   0.559451 )
Norm@50keV  : 2.98582E-04    ( -0.000126746   0.000129919 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          70.64 using 59 PHA bins.
# Reduced chi-squared =          1.239 for     57 degrees of freedom 
# Null hypothesis probability =   1.057888e-01
 
Photon flux (15-150 keV)    in 64 sec: 5.55432E-02 ( -0.0152306  0.0154248 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.85734e-07 ( -6.24991e-08  6.86867e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.99668     ( -5.62582   2.74763 )
Epeak [keV] : 30.9632      ( -7.41392 6.77691 )
Norm@50keV  : 0.219783    ( -0.261598   1435.07 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.34 using 59 PHA bins.
# Reduced chi-squared =          1.113 for     56 degrees of freedom 
# Null hypothesis probability =   2.608703e-01
 
Photon flux (15-150 keV)    in 64 sec: 5.65672E-02 ( -0.0144595  0.0145552 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.68353e-07 ( -4.59482e-08  4.99674e-08 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 1.97362   ( -2.61597   -1.8792 )
beta        : -10.0000    ( 10   10 )
Epeak [keV] : 30.9621      ( -7.56036 6.8122 )
Norm@50keV   : 0.212810    ( -0.212868   21.8799 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.35 using 59 PHA bins.
# Reduced chi-squared =          1.134 for     55 degrees of freedom 
# Null hypothesis probability =   2.312208e-01
 
Photon flux (15-150 keV)    in 64 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.72987e-07 ( 0  0 ) ergs/cm2

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

S(25-50 keV)  = 6.11e-08
S(50-100 keV) = 4.55e-08

T90 vs. Hardness ratio plot

T90                                   = 64 sec.
Hardness ratio (energy fluence ratio) = 0.744681

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.38951
Count Ratio (50-100 keV) / (15-25 keV) = -0.114067

Mask shadow pattern

IMX = 3.485540760724322E-01, IMY = -1.902110956517583E-01

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:

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

Time interval of the image:
0.000000 64.000000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6276  22.0167    0.3  24.2  -20.2   2.7952  37.1    0.3	Crab                          
 83.2008  67.2990    2.5  22.4 -173.0   0.3560   4.6 ------	UNKNOWN                       
111.7311  21.7526    2.9  37.9  -65.0   0.6870   4.0 ------	UNKNOWN                       
153.1046  57.6232    2.3  47.2 -135.5   1.1995   5.1 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
-239.000000 363.061700
481.000000 543.063900
661.000000 723.010600
841.000000 903.050200
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6331  22.0190    0.1  24.2  -20.2  33.7441  78.2    0.3	Crab                          
304.7214  75.7210    2.5  54.9  165.8  12.2784   4.5 ------	UNKNOWN                       
 65.6261  29.7475    3.9  17.3   28.3   1.2183   2.9 ------	UNKNOWN                       
211.4676  71.5943    4.8  59.1 -166.2   7.6801   2.4 ------	UNKNOWN                       
103.3533  28.0601    3.1  28.1  -62.9   2.0889   3.7 ------	UNKNOWN                       
141.6056  47.2650    3.0  44.5 -118.5   7.1682   3.9 ------	UNKNOWN

Plot creation:
Mon Oct  5 16:40:29 EDT 2015