batgrbproduct analysis for trigger=520658

batgrbproduct Analysis for Trigger=520658

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 13 04:39:17 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger520658
======================================================================

  Trigger: 00520658      Segment: 000

  BAT Trigger Time: 356771531.776   [s; MET]
      Trigger Stop: 356771535.872   [s; MET]
               UTC: 2012-04-22T07:12:03.648220    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 136.929034138057   Dec: 14.0064324830064  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.33
     Image Trigger?:     NO
     Rate S/N Ratio:     11.8321595661992  [ if not an image trigger ]
     Image S/N Ratio:    8.33

  Flight Position:   [ source = BAT ]
    RA: 136.929034138057   Dec: 14.0064324830064  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 136.929   Dec: 14.0064  [deg; J2000]
        { 09h 07m 43.0s , +14d 00' 23.0" }
        +/- 2.14850083649 [arcmin] (estimated 90% radius based on SNR)
    SNR: 10.2022479276
 
 
  Angular difference between Flight and Ground position is 0.002784 arcmin
 
  Partial Coding Fraction: 0.6875    [ including projection effects ]

  Duration
     T90: 60.3520000576973 +/- 5.72791058369858
        Measured from: 1.18399995565414
                   to: 61.5360000133514     [s; relative to TRIGTIME]
     T50: 49.6000000238419 +/- 36.9015364662264
        Measured from: 3.74399995803833
                   to: 53.3439999818802     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.843999981880188     
                   to: 1.84399998188019     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0.863999962806702     
                   to: 63.2639999985695     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.227268   0.221272   0.138424   0.060864
           0.046741   0.048558   0.043185   0.038802 [error]
 Peak      0.017411   0.023975   0.026005   0.007563
           0.006433   0.006483   0.006161   0.005544 [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 7.07e-08 9.67e-08 9.76e-08 1.79e-07 3.22e-07 4.44e-07   erg/cm2
              Error 2.06e-08 2.19e-08 4.08e-08 1.51e-07 9.31e-08 1.97e-07   erg/cm2
Peak flux Power-law 1.27e-01 1.72e-01 1.72e-01 3.11e-01 5.72e-01 7.82e-01   ph/cm2/s
              Error 6.97e-02 5.68e-02 4.86e-02 2.04e-01 1.51e-01 2.27e-01   ph/cm2/s
 
Fluence   Cutoff-PL 7.06e-08 9.65e-08 9.74e-08 1.47e-07 3.23e-07 4.10e-07   erg/cm2
              Error 2.06e-08 2.59e-08 4.80e-08 1.38e-07 1.02e-07 2.26e-07   erg/cm2
Peak flux Cutoff-PL 1.23e-01 1.73e-01 1.75e-01 2.68e-01 5.68e-01 7.39e-01   ph/cm2/s
              Error 8.04e-02 5.97e-02 5.61e-02 2.78e-01 1.57e-01 2.80e-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    1.986    0.446    -      -           5.61e-04 1.71e-04   50.360 57
CPL   2.098    0.000      44.7    0.0      4.77e-04 0.00e+00   50.310 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.002    0.490    -      -           4.97e-03 1.29e-03   58.220 57
CPL   0.867    0.766     481.7    0.0      5.70e-03 0.00e+00   58.200 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: 3.200000 sec.
T50 in the 50-300 keV band: 1.664000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   62.400    0.864   63.264
T90    60.352    1.184   61.536
T50    49.600    3.744   53.344
Peak    1.000    0.844    1.844

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
136.929 14.006 0.000 23.543 -110.991 0.177 10.202 TRIG_00520658
 
Image time interval: 0.000 to 4.096 [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 4.096000

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 4.096000

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 4.096000

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    0.864 sec. to   63.264 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.98649     ( -0.416196   0.474842 )
Norm@50keV  : 5.60596E-04    ( -0.00017508   0.000165992 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.36 using 59 PHA bins.
# Reduced chi-squared =         0.8836 for     57 degrees of freedom 
# Null hypothesis probability =   7.205352e-01
 
Photon flux (15-150 keV)    in 62.4 sec: 8.35714E-02 ( -0.0181214  0.0181281 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.22375e-07 ( -9.00101e-08  9.62114e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.864 sec. to   63.264 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.09839     (     )
Epeak [keV] : 44.6638      (   )
Norm@50keV  : 4.76705E-04    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.31 using 59 PHA bins.
# Reduced chi-squared =         0.8983 for     56 degrees of freedom 
# Null hypothesis probability =   6.892539e-01
 
Photon flux (15-150 keV)    in 62.4 sec: 8.35222E-02 ( -0.0180895  0.0180258 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.22635e-07 ( -1.09973e-07  9.45185e-08 ) ergs/cm2

Band function

Time interval is from    0.864 sec. to   63.264 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.11557   ( 1.03212   1.03212 )
beta        : -2.09388    ( 2.10678   0.523826 )
Epeak [keV] : 28.2931      ( -28.3804 147.865 )
Norm@50keV   : 2.34711E-03    ( -0.00311077   201.936 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.20 using 59 PHA bins.
# Reduced chi-squared =         0.9128 for     55 degrees of freedom 
# Null hypothesis probability =   6.581706e-01
 
Photon flux (15-150 keV)    in 62.4 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]    : 8.25364  (-1.91459  2.63871)
R^2/D10^2   : 8.05036E-02  (-0.0529775   0.145441)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.87 using 59 PHA bins.
# Reduced chi-squared =         0.9626 for     57 degrees of freedom 
# Null hypothesis probability =   5.554151e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.327e-08   2.914e-08
25- 50  1.168e-07   5.150e-08
50-150  3.396e-08   2.257e-08
15-150  2.140e-07   1.004e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 62.2371       (-31.8718      120.975)
Norm        : 0.429752       (-0.134147     0.226979)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.95 using 59 PHA bins.
# Reduced chi-squared =         0.8938 for     57 degrees of freedom 
# Null hypothesis probability =   7.002717e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.778e-08   2.289e-08
25- 50  1.043e-07   3.698e-08
50-150  1.223e-07   9.221e-08
15-150  2.944e-07   1.680e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.49017        (-2.83001      2.56022)
R1^2/D10^2  : 0.177010        (-0.106648      0.163163)
kT2 [keV]   : 37.3083        (-41.6097      -54.2464)
R2^2/D10^2  : 2.17016E-04    (-8.65857e-05   0.0109113)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.58 using 59 PHA bins.
# Reduced chi-squared =         0.9015 for     55 degrees of freedom 
# Null hypothesis probability =   6.808856e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.118e-08   4.103e-08
25- 50  9.786e-08   5.451e-08
50-150  1.593e-07   9.744e-08
15-150  3.283e-07   1.803e-07

Peak spectrum fit

Power-law model

Time interval is from    0.844 sec. to    1.844 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.00229     ( -0.508608   0.471181 )
Norm@50keV  : 4.96750E-03    ( -0.00129734   0.00128291 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.22 using 59 PHA bins.
# Reduced chi-squared =          1.021 for     57 degrees of freedom 
# Null hypothesis probability =   4.302537e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.571942 ( -0.150528  0.151616 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.3672e-08 ( -1.5039e-08  1.53442e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.844 sec. to    1.844 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.866635     ( -2.39793   -0.86663 )
Epeak [keV] : 481.688      ( -481.675 -481.675 )
Norm@50keV  : 5.70313E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.20 using 59 PHA bins.
# Reduced chi-squared =          1.039 for     56 degrees of freedom 
# Null hypothesis probability =   3.943064e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.568108 ( -0.159174  0.154274 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.32953e-08 ( -1.62822e-08  1.56443e-08 ) ergs/cm2

Band function

Time interval is from    0.844 sec. to    1.844 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.98776   ( 1.98776   1.98776 )
beta        : -1.00212    ( -0.471861   0.508486 )
Epeak [keV] : 9999.16      ( -9999.31 -9999.31 )
Norm@50keV   : 4.96677E-03    ( -0.00126841   0.00253748 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.22 using 59 PHA bins.
# Reduced chi-squared =          1.059 for     55 degrees of freedom 
# Null hypothesis probability =   3.577700e-01
 
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]    : 22.5657  (-6.95863  12.6391)
R^2/D10^2   : 1.85746E-02  (-0.0185502   0.0412184)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.65 using 59 PHA bins.
# Reduced chi-squared =          1.064 for     57 degrees of freedom 
# Null hypothesis probability =   3.456914e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.730e-09   1.093e-09
25- 50  9.284e-09   5.590e-09
50-150  3.533e-08   2.019e-08
15-150  4.634e-08   2.790e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-86.2117      -200)
Norm        : 2.33339       (-0.624322     0.624322)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.91 using 59 PHA bins.
# Reduced chi-squared =          1.086 for     57 degrees of freedom 
# Null hypothesis probability =   3.052586e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.813e-09   3.503e-09
25- 50  1.118e-08   6.705e-09
50-150  2.453e-08   1.477e-08
15-150  4.152e-08   2.459e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.77853        (-6.77888      -6.77888)
R1^2/D10^2  : 0.441225        (-0.44115      1.6605)
kT2 [keV]   : 31.8680        (-31.8688      -31.8688)
R2^2/D10^2  : 5.80710E-03    (-0.0058066   0.0293512)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.15 using 59 PHA bins.
# Reduced chi-squared =          1.057 for     55 degrees of freedom 
# Null hypothesis probability =   3.600115e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.034e-09   2.498e-09
25- 50  9.658e-09   5.040e-09
50-150  3.983e-08   2.252e-08
15-150  5.352e-08   3.009e-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: 1.77470     ( -0.461334   0.512736 )
Norm@50keV  : 7.10450E-04    ( -0.000225576   0.000211708 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.73 using 59 PHA bins.
# Reduced chi-squared =          1.030 for     57 degrees of freedom 
# Null hypothesis probability =   4.118688e-01
 
Photon flux (15-150 keV)    in 37.26 sec: 9.69547E-02 ( -0.0241207  0.0241207 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.43948e-07 ( -7.52674e-08  7.9587e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.70911     ( -1.65304   1.05437 )
Epeak [keV] : 193.348      (   )
Norm@50keV  : 7.73287E-04    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.75 using 59 PHA bins.
# Reduced chi-squared =          1.049 for     56 degrees of freedom 
# Null hypothesis probability =   3.751498e-01
 
Photon flux (15-150 keV)    in 37.26 sec: 9.69238E-02 ( -0.0241134  0.0241132 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.44128e-07 ( -8.2633e-08  7.8499e-08 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 3.53501   ( 1.07096   1.07096 )
beta        : -1.86394    ( 1.82503   0.503276 )
Epeak [keV] : 21.7534      ( -32.0128 -32.0128 )
Norm@50keV   : 16.0672    ( -17.3087   91.8513 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.43 using 59 PHA bins.
# Reduced chi-squared =          1.062 for     55 degrees of freedom 
# Null hypothesis probability =   3.506751e-01
 
Photon flux (15-150 keV)    in 37.26 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)  = 9.67e-08
S(50-100 keV) = 9.76e-08

T90 vs. Hardness ratio plot

T90                                   = 60.3520000576973 sec.
Hardness ratio (energy fluence ratio) = 1.00931

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 0.973617
Count Ratio (50-100 keV) / (15-25 keV) = 0.609078

Mask shadow pattern

IMX = -0.156082287016, IMY = 0.406797878943

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000

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:
-239.776000 0.864000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
204.1511  14.9349    2.5  42.1   51.2   2.7104   4.6 ------	UNKNOWN                       
118.0222 -30.3914    3.7  58.9 -166.0   3.9058   3.1 ------	UNKNOWN                       
126.7742   6.6039    2.8  34.1 -124.8   1.1414   4.1 ------	UNKNOWN

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

Time interval of the image:
0.864000 38.124600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
136.9113  14.0138    1.7  23.6 -111.0   0.5267   6.8 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
84.324590 962.238300
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.3829 -40.5700   21.7  54.6  165.3   1.4476   0.5    6.7	Vela X-1                      
176.0434  61.7297    2.4  55.2    5.1   9.6069   4.8 ------	UNKNOWN                       
142.5127  39.7415    2.8  26.2   -6.5   1.9477   4.1 ------	UNKNOWN                       
112.4325  55.4360    3.2  45.6  -35.5   3.6084   3.7 ------	UNKNOWN                       
 93.6995 -21.3549    4.1  55.3 -145.3  11.2192   2.9 ------	UNKNOWN

Plot creation:
Thu Oct  8 20:21:40 EDT 2015