batgrbproduct analysis for trigger=425647

batgrbproduct Analysis for Trigger=425647

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): Thu Sep 11 11:14:43 EDT 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger425647
======================================================================

  Trigger: 00425647      Segment: 000

  BAT Trigger Time: 299183554.304   [s; MET]
      Trigger Stop: 299183554.56   [s; MET]
               UTC: 2010-06-25T18:32:28.377940    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 15.7708589285121   Dec: -39.0829393330905  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    15.27
     Image Trigger?:     NO
     Rate S/N Ratio:     93.2469838654313  [ if not an image trigger ]
     Image S/N Ratio:    15.27

  Flight Position:   [ source = BAT ]
    RA: 15.7708589285121   Dec: -39.0829393330905  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 15.7953236747917   Dec: -39.09191298843  [deg; J2000]  
        { 01h 03m 10.9s , -39d 05' 30.9" }
         +/- 1.05073147786973 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.303704918290393 [arcmin] (formal 1-sigma fit error)
    SNR: 28.3410469731656
 
  Angular difference between Flight and Ground position is 1.260164 arcmin
 
  Partial Coding Fraction: 1    [ including projection effects ]

  Duration
     T90: 0.331999957561493 +/- 0.0368781685195268
        Measured from: -0.0480000376701355
                   to: 0.283999919891357     [s; relative to TRIGTIME]
     T50: 0.167999982833862 +/- 0.0178885001041659
        Measured from: 0.0399999618530273
                   to: 0.20799994468689     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.368000030517578     
                   to: 0.631999969482422     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.0680000185966492     
                   to: 0.328000009059906     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.055112   0.105774   0.116167   0.042381
           0.005317   0.005656   0.006141   0.005017 [error]
 Peak      0.052671   0.125188   0.120020   0.041731
           0.007473   0.007231   0.007278   0.006096 [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 1.50e-08 4.01e-08 8.67e-08 4.88e-07 2.34e-07 6.30e-07   erg/cm2
              Error 1.77e-09 2.78e-09 5.57e-09 7.39e-08 1.50e-08 7.68e-08   erg/cm2
Peak flux Power-law 5.31e-01 7.54e-01 7.96e-01 1.55e+00 2.57e+00 3.63e+00   ph/cm2/s
              Error 7.54e-02 6.39e-02 5.55e-02 2.45e-01 1.70e-01 2.70e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.44e-08 4.06e-08 8.83e-08 3.88e-07 2.32e-07 5.31e-07   erg/cm2
              Error 1.67e-09 2.99e-09 6.65e-09 1.32e-07 1.60e-08 1.40e-07   erg/cm2
Peak flux Cutoff-PL 5.04e-01 7.61e-01 8.13e-01 1.27e+00 2.54e+00 3.35e+00   ph/cm2/s
              Error 7.08e-02 6.69e-02 6.72e-02 4.86e-01 1.78e-01 5.04e-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    0.889    0.103    -      -           5.24e-02 2.99e-03   73.710 57
CPL   0.724    0.319     446.6    0.0      6.20e-02 2.23e-02   73.210 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.922    0.119    -      -           2.24e-02 1.47e-03   80.540 57
CPL   0.736    0.364     391.4    0.0      2.70e-02 1.11e-02   80.030 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: 0.320000 sec.
T50 in the 50-300 keV band: 0.192000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100    0.396   -0.068    0.328
T90     0.332   -0.048    0.284
T50     0.168    0.040    0.208
Peak    1.000   -0.368    0.632

Click here for the BAT GCN circular template

Special notes of this burst

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
   15.7953   -39.0919   0.0068     2.0795   -17.4411         0.3202201     28.341 TRIG_00425647                 
 
Foreground time interval of the image:
 -0.068   0.328 (delta_t =   0.396 [sec])
Background time interval of the image:
-239.304  -0.068 (delta_t = 239.236 [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

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)

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

The mask-weighted light curves based on cleaned DPHs

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   -0.068 sec. to    0.328 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.889202     ( -0.103162   0.101956 )
Norm@50keV  : 5.23686E-02    ( -0.00299319   0.00298501 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          73.71 using 59 PHA bins.
# Reduced chi-squared =          1.293 for     57 degrees of freedom 
# Null hypothesis probability =   6.745055e-02
 
Photon flux (15-150 keV)    in 0.396 sec: 6.01032 ( -0.34311  0.343334 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.33719e-07 ( -1.49761e-08  1.50479e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.068 sec. to    0.328 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.724476     ( -0.427077   0.211145 )
Epeak [keV] : 446.618      ( -446.622 -446.622 )
Norm@50keV  : 6.19738E-02    ( -0.0119018   0.0326322 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          73.21 using 59 PHA bins.
# Reduced chi-squared =          1.307 for     56 degrees of freedom 
# Null hypothesis probability =   6.105317e-02
 
Photon flux (15-150 keV)    in 0.396 sec: 5.96909 ( -0.35712  0.35642 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.31741e-07 ( -1.60637e-08  1.58772e-08 ) ergs/cm2

Band function

Time interval is from   -0.068 sec. to    0.328 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.909498   ( 0.909324   0.909324 )
beta        : -0.889204    ( -0.101931   0.103257 )
Epeak [keV] : 13.6521      ( -13.6545 -13.6545 )
Norm@50keV   : 7.75303E-02    ( -0.0278294   1.53553e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          73.71 using 59 PHA bins.
# Reduced chi-squared =          1.340 for     55 degrees of freedom 
# Null hypothesis probability =   4.684163e-02
 
Photon flux (15-150 keV)    in 0.396 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]    : 22.8161  (  )
R^2/D10^2   : 0.195747  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         117.65 using 59 PHA bins.
# Reduced chi-squared =         2.0640 for     57 degrees of freedom 
# Null hypothesis probability =   4.170331e-06
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.341e-09   8.336e-10
25- 50  3.965e-08   3.269e-09
50-150  1.542e-07   1.477e-08
15-150  2.012e-07   1.439e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.362       (      )
Norm        : 23.2936       (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         179.78 using 59 PHA bins.
# Reduced chi-squared =         3.1540 for     57 degrees of freedom 
# Null hypothesis probability =   1.219036e-14
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.297e-08   1.552e-09
25- 50  4.419e-08   3.901e-09
50-150  9.691e-08   2.293e-08
15-150  1.641e-07   3.010e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 11.2877        (-2.73455      3.05639)
R1^2/D10^2  : 1.00204        (-0.434637      1.04005)
kT2 [keV]   : 50.9472        (-16.0838      92.5588)
R2^2/D10^2  : 1.54736E-02    (-0.0129726   0.0205248)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          72.90 using 59 PHA bins.
# Reduced chi-squared =          1.326 for     55 degrees of freedom 
# Null hypothesis probability =   5.341573e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.232e-08   3.253e-09
25- 50  4.343e-08   1.082e-08
50-150  1.773e-07   7.801e-08
15-150  2.331e-07   8.522e-08

Peak spectrum fit

Power-law model

Time interval is from   -0.368 sec. to    0.632 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.922313     ( -0.120325   0.11804 )
Norm@50keV  : 2.23604E-02    ( -0.00147295   0.00146815 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          80.54 using 59 PHA bins.
# Reduced chi-squared =          1.413 for     57 degrees of freedom 
# Null hypothesis probability =   2.175967e-02
 
Photon flux (15-150 keV)    in 1 sec: 2.56725 ( -0.169953  0.170261 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.48799e-07 ( -1.7671e-08  1.7771e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.368 sec. to    0.632 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.735549     ( -0.486473   0.241187 )
Epeak [keV] : 391.392      ( -391.397 -391.397 )
Norm@50keV  : 2.70214E-02    ( -0.00581057   0.0164712 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          80.03 using 59 PHA bins.
# Reduced chi-squared =          1.429 for     56 degrees of freedom 
# Null hypothesis probability =   1.923312e-02
 
Photon flux (15-150 keV)    in 1 sec: 2.54422 ( -0.17824  0.17826 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.46237e-07 ( -1.9144e-08  1.8884e-08 ) ergs/cm2

Band function

Time interval is from   -0.368 sec. to    0.632 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.99998   ( -4.99998   -4.99998 )
beta        : -1.04149    ( -0.185053   0.145335 )
Epeak [keV] : 34.6462      ( -34.6462 5.87458 )
Norm@50keV   : 220.245    ( -14.1137   3.41026e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          78.69 using 59 PHA bins.
# Reduced chi-squared =          1.431 for     55 degrees of freedom 
# Null hypothesis probability =   1.975444e-02
 
Photon flux (15-150 keV)    in 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]    : 22.8651  (  )
R^2/D10^2   : 8.15622E-02  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         115.48 using 59 PHA bins.
# Reduced chi-squared =         2.0260 for     57 degrees of freedom 
# Null hypothesis probability =   7.501045e-06
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.750e-09   1.087e-09
25- 50  4.191e-08   4.320e-09
50-150  1.637e-07   1.850e-08
15-150  2.133e-07   1.940e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (      )
Norm        : 10.3370       (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         154.93 using 59 PHA bins.
# Reduced chi-squared =         2.7181 for     57 degrees of freedom 
# Null hypothesis probability =   5.433722e-11
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.574e-08   2.030e-09
25- 50  4.951e-08   6.805e-09
50-150  1.086e-07   3.325e-08
15-150  1.838e-07   4.510e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 10.7608        (-2.2878      2.79678)
R1^2/D10^2  : 0.509808        (-0.229819      0.473508)
kT2 [keV]   : 49.1139        (-14.6402      62.4056)
R2^2/D10^2  : 7.11892E-03    (-0.0055398   0.0101759)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          76.18 using 59 PHA bins.
# Reduced chi-squared =          1.385 for     55 degrees of freedom 
# Null hypothesis probability =   3.085996e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.418e-08   4.964e-09
25- 50  4.742e-08   1.618e-08
50-150  1.860e-07   8.397e-08
15-150  2.476e-07   1.002e-07

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: 0.889202     ( -0.103162   0.101956 )
Norm@50keV  : 5.23686E-02    ( -0.00299319   0.00298501 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          73.71 using 59 PHA bins.
# Reduced chi-squared =          1.293 for     57 degrees of freedom 
# Null hypothesis probability =   6.745055e-02
 
Photon flux (15-150 keV)    in 0.396 sec: 6.01032 ( -0.34311  0.343334 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.33719e-07 ( -1.49761e-08  1.50479e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.724476     ( -0.427077   0.211145 )
Epeak [keV] : 446.618      ( -446.622 -446.622 )
Norm@50keV  : 6.19738E-02    ( -0.0119018   0.0326322 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          73.21 using 59 PHA bins.
# Reduced chi-squared =          1.307 for     56 degrees of freedom 
# Null hypothesis probability =   6.105317e-02
 
Photon flux (15-150 keV)    in 0.396 sec: 5.96909 ( -0.35712  0.35642 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.31741e-07 ( -1.60637e-08  1.58772e-08 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.909498   ( 0.909324   0.909324 )
beta        : -0.889204    ( -0.101931   0.103257 )
Epeak [keV] : 13.6521      ( -13.6545 -13.6545 )
Norm@50keV   : 7.75303E-02    ( -0.0278294   1.53553e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          73.71 using 59 PHA bins.
# Reduced chi-squared =          1.340 for     55 degrees of freedom 
# Null hypothesis probability =   4.684163e-02
 
Photon flux (15-150 keV)    in 0.396 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)  = 4.01e-08
S(50-100 keV) = 8.67e-08

T90 vs. Hardness ratio plot

T90                                   = 0.331999957561493 sec.
Hardness ratio (energy fluence ratio) = 2.16209

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.91926
Count Ratio (50-100 keV) / (15-25 keV) = 2.10783

Mask shadow pattern

IMX = 3.464113287164557E-02, IMY = 1.088317170812843E-02

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:
-239.304000 -0.068000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 17.5768 -35.6480    2.4   3.7  -92.6   1.0123   4.8 ------	UNKNOWN

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

Time interval of the image:
-0.068000 0.328000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 15.7953 -39.0919    0.4   2.1  -17.4   0.3202  28.3 ------	UNKNOWN                       
 45.6624  -8.7600    2.2  40.8  -96.4   0.2425   5.3 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
32.596600 722.966000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
331.8588 -33.3268    3.2  35.6  110.7   2.7331   3.6 ------	UNKNOWN                       
346.1289 -71.5044    2.0  35.7   40.9   3.0860   5.7 ------	UNKNOWN                       
  5.4003  19.1346    3.7  59.0 -166.2   6.9233   3.1 ------	UNKNOWN                       
 24.1353  15.6601    5.0  55.3 -144.9   4.7895   2.3 ------	UNKNOWN

Plot creation:
Sun May 31 01:10:35 EDT 2015