batgrbproduct analysis for trigger=444912

batgrbproduct Analysis for Trigger=444912

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): Tue Jan 14 00:24:10 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger444912
======================================================================

  Trigger: 00444912      Segment: 000

  BAT Trigger Time: 318770246.656   [s; MET]
      Trigger Stop: 318770246.72   [s; MET]
               UTC: 2011-02-07T11:17:20.015680    [includes UTCF correction] 
       Where From?: (*SHORT BURST*) TDRSS scaled map message

  BAT 
    RA: 12.5424372427686   Dec: -10.8057018983402  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.39
     Image Trigger?:     NO
     Rate S/N Ratio:     15.5884572681199  [ if not an image trigger ]
     Image S/N Ratio:    7.39

  Flight Position:   [ source = BAT ]
    RA: 12.5424372427686   Dec: -10.8057018983402  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 12.5428354271555   Dec: -10.7939290626074  [deg; J2000]  
        { 00h 50m 10.3s , -10d 47' 38.1" }
         +/- 1.21996156865598 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.402178486200574 [arcmin] (formal 1-sigma fit error)
    SNR: 22.8963754292715
 
  Angular difference between Flight and Ground position is 0.706760 arcmin
 
  Partial Coding Fraction: 1    [ including projection effects ]

  Duration
     T90: 82.5799999833107 +/- 10.8304341416461
        Measured from: 0.335999965667725
                   to: 82.9159999489784     [s; relative to TRIGTIME]
     T50: 28.3679999113083 +/- 8.39066149751195
        Measured from: 17.972000002861
                   to: 46.3399999141693     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.110000014305115     
                   to: 0.889999985694885     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.0879999995231628     
                   to: 95.7960000038147     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.565433   0.941034   0.671875   0.187425
           0.046853   0.049742   0.046855   0.047542 [error]
 Peak      0.034644   0.053797   0.039254   0.030237
           0.005192   0.005783   0.005643   0.005424 [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 1.64e-07 3.41e-07 5.54e-07 2.02e-06 1.53e-06 3.08e-06   erg/cm2
              Error 1.91e-08 2.33e-08 4.59e-08 3.77e-07 1.13e-07 4.09e-07   erg/cm2
Peak flux Power-law 2.57e-01 3.35e-01 3.20e-01 5.42e-01 1.09e+00 1.45e+00   ph/cm2/s
              Error 6.36e-02 4.79e-02 4.58e-02 1.78e-01 1.31e-01 2.03e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.60e-07 3.45e-07 5.58e-07 1.63e-06 1.51e-06 2.69e-06   erg/cm2
              Error 2.13e-08 2.71e-08 4.82e-08 8.49e-07 1.30e-07 7.03e-07   erg/cm2
Peak flux Cutoff-PL 2.63e-01 3.38e-01 3.17e-01 5.19e-01 1.09e+00 1.44e+00   ph/cm2/s
              Error 6.37e-02 4.81e-02 4.60e-02 1.99e-01 1.31e-01 2.86e-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    1.299    0.117    -      -           1.62e-03 1.03e-04   72.620 57
CPL   1.170    0.350     323.3    0.0      1.88e-03 8.26e-04   72.360 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.067    0.233    -      -           9.45e-03 1.12e-03   72.820 57
CPL   1.063    0.242    10000.0    0.0      9.50e-03 0.00e+00   72.860 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: 37.760000 sec.
T50 in the 50-300 keV band: 20.096000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   95.884   -0.088   95.796
T90    82.580    0.336   82.916
T50    28.368   17.972   46.340
Peak    1.000   -0.110    0.890

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
   12.5428   -10.7939   0.0084    14.3877   -34.9708         2.5619690     22.896 TRIG_00444912                 
 
Foreground time interval of the image:
 -0.088  95.796 (delta_t =  95.884 [sec])
Background time interval of the image:
-322.155 -315.557 (delta_t =   6.598 [sec])
-239.656  -0.088 (delta_t = 239.568 [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 0.064000

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 0.064000

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 0.064000

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   -0.088 sec. to   95.796 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.29885     ( -0.116978   0.116711 )
Norm@50keV  : 1.61608E-03    ( -0.000103173   0.000102852 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          72.62 using 59 PHA bins.
# Reduced chi-squared =          1.274 for     57 degrees of freedom 
# Null hypothesis probability =   7.952301e-02
 
Photon flux (15-150 keV)    in 95.88 sec: 0.192762 ( -0.0122864  0.0122958 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.53157e-06 ( -1.12645e-07  1.13819e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.088 sec. to   95.796 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.17006     ( -0.467695   0.23221 )
Epeak [keV] : 323.330      ( -323.359 -323.359 )
Norm@50keV  : 1.87565E-03    ( -0.000350791   0.00130162 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          72.36 using 59 PHA bins.
# Reduced chi-squared =          1.292 for     56 degrees of freedom 
# Null hypothesis probability =   6.967059e-02
 
Photon flux (15-150 keV)    in 95.88 sec: 0.191361 ( -0.013117  0.013066 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.51222e-06 ( -1.32334e-07  1.27645e-07 ) ergs/cm2

Band function

Time interval is from   -0.088 sec. to   95.796 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.244774   ( 0.443818   0.443818 )
beta        : -1.43237    ( -0.261029   0.188725 )
Epeak [keV] : 59.4090      ( -59.4733 267.036 )
Norm@50keV   : 7.12411E-03    ( -0.00723895   106.847 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          70.55 using 59 PHA bins.
# Reduced chi-squared =          1.283 for     55 degrees of freedom 
# Null hypothesis probability =   7.713002e-02
 
Photon flux (15-150 keV)    in 95.88 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]    : 15.8721  (  )
R^2/D10^2   : 1.81170E-02  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         122.95 using 59 PHA bins.
# Reduced chi-squared =         2.1570 for     57 degrees of freedom 
# Null hypothesis probability =   9.558568e-07
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.064e-08   1.204e-08
25- 50  3.788e-07   3.222e-08
50-150  6.649e-07   8.802e-08
15-150  1.134e-06   9.924e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (      )
Norm        : 0.789203       (-0.0500122     0.0500094)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          84.19 using 59 PHA bins.
# Reduced chi-squared =          1.477 for     57 degrees of freedom 
# Null hypothesis probability =   1.108812e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.885e-07   1.314e-08
25- 50  3.625e-07   3.624e-08
50-150  7.951e-07   2.196e-07
15-150  1.346e-06   2.229e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 9.15025        (-1.52957      1.627)
R1^2/D10^2  : 8.33406E-02        (-0.03224      0.0610782)
kT2 [keV]   : 42.7260        (-12.7622      39.3407)
R2^2/D10^2  : 5.91684E-04    (-0.000464587   0.00114475)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          68.30 using 59 PHA bins.
# Reduced chi-squared =          1.242 for     55 degrees of freedom 
# Null hypothesis probability =   1.073061e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.441e-07   2.983e-08
25- 50  3.750e-07   7.071e-08
50-150  1.030e-06   4.718e-07
15-150  1.549e-06   5.360e-07

Peak spectrum fit

Power-law model

Time interval is from   -0.110 sec. to    0.890 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.06670     ( -0.236045   0.229148 )
Norm@50keV  : 9.44505E-03    ( -0.0011187   0.00111868 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          72.82 using 59 PHA bins.
# Reduced chi-squared =          1.277 for     57 degrees of freedom 
# Null hypothesis probability =   7.721667e-02
 
Photon flux (15-150 keV)    in 1 sec: 1.09231 ( -0.130772  0.130914 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.98241e-08 ( -1.39994e-08  1.42148e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.110 sec. to    0.890 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.06264     ( -0.268198   0.215259 )
Epeak [keV] : 1.00000E+04      (   )
Norm@50keV  : 9.49666E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          72.86 using 59 PHA bins.
# Reduced chi-squared =          1.301 for     56 degrees of freedom 
# Null hypothesis probability =   6.450376e-02
 
Photon flux (15-150 keV)    in 1 sec: 1.09384 ( -0.132112  0.12951 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.00102e-07 ( -1.41159e-08  1.2974e-08 ) ergs/cm2

Band function

Time interval is from   -0.110 sec. to    0.890 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 5.00000   ( -4.99999   -4.99999 )
beta        : -1.08458    ( -0.244766   0.243548 )
Epeak [keV] : 21.4178      ( -21.4178 125.008 )
Norm@50keV   : 1699.19    ( -201.152   2.3069e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          72.61 using 59 PHA bins.
# Reduced chi-squared =          1.320 for     55 degrees of freedom 
# Null hypothesis probability =   5.603059e-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]    : 18.6953  (-4.06203  6.41608)
R^2/D10^2   : 6.02293E-02  (-0.0350373   0.0719053)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         101.58 using 59 PHA bins.
# Reduced chi-squared =         1.7821 for     57 degrees of freedom 
# Null hypothesis probability =   2.584933e-04
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.162e-09   1.110e-09
25- 50  1.979e-08   4.135e-09
50-150  5.066e-08   1.297e-08
15-150  7.461e-08   1.404e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (      )
Norm        : 4.35083       (-0.533851     0.533845)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          85.93 using 59 PHA bins.
# Reduced chi-squared =          1.508 for     57 degrees of freedom 
# Null hypothesis probability =   7.924493e-03
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.083e-08   6.100e-09
25- 50  2.084e-08   1.148e-08
50-150  4.570e-08   2.505e-08
15-150  7.737e-08   4.273e-08

Double BB

------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 9.49095        (-1.71188      2.34826)
R1^2/D10^2  : 0.439331        (-0.265327      0.501626)
kT2 [keV]   : 199.578        (      )
R2^2/D10^2  : 2.65491E-04    (-6.31739e-05   0.00244507)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.30 using 59 PHA bins.
#Fit statistic : Chi-Squared =          64.95 using 59 PHA bins.
# Reduced chi-squared =          1.187 for     55 degrees of freedom 
# Reduced chi-squared =          1.181 for     55 degrees of freedom 
# Null hypothesis probability =   1.611926e-01
# Null hypothesis probability =   1.686694e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.451e-09   3.453e-09
25- 50  2.069e-08   9.854e-09
50-150  7.972e-08   7.438e-08
15-150  1.089e-07   9.311e-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: 1.29885     ( -0.116978   0.116711 )
Norm@50keV  : 1.61608E-03    ( -0.000103173   0.000102852 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          72.62 using 59 PHA bins.
# Reduced chi-squared =          1.274 for     57 degrees of freedom 
# Null hypothesis probability =   7.952301e-02
 
Photon flux (15-150 keV)    in 95.88 sec: 0.192762 ( -0.0122864  0.0122958 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.53157e-06 ( -1.12645e-07  1.13819e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.17006     ( -0.467695   0.23221 )
Epeak [keV] : 323.330      ( -323.359 -323.359 )
Norm@50keV  : 1.87565E-03    ( -0.000350791   0.00130162 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          72.36 using 59 PHA bins.
# Reduced chi-squared =          1.292 for     56 degrees of freedom 
# Null hypothesis probability =   6.967059e-02
 
Photon flux (15-150 keV)    in 95.88 sec: 0.191361 ( -0.013117  0.013066 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.51222e-06 ( -1.32334e-07  1.27645e-07 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.244774   ( 0.443818   0.443818 )
beta        : -1.43237    ( -0.261029   0.188725 )
Epeak [keV] : 59.4090      ( -59.4733 267.036 )
Norm@50keV   : 7.12411E-03    ( -0.00723895   106.829 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          70.55 using 59 PHA bins.
# Reduced chi-squared =          1.283 for     55 degrees of freedom 
# Null hypothesis probability =   7.713002e-02
 
Photon flux (15-150 keV)    in 95.88 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)  = 3.41e-07
S(50-100 keV) = 5.54e-07

T90 vs. Hardness ratio plot

T90                                   = 82.5799999833107 sec.
Hardness ratio (energy fluence ratio) = 1.62463

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.66427
Count Ratio (50-100 keV) / (15-25 keV) = 1.18825

Mask shadow pattern

IMX = 2.102093911011948E-01, IMY = 1.470308664916008E-01

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.064000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.064000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.064000

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:
-322.155390 -315.557200
-239.656000 -0.088000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 61.8266 -18.7479    2.6  35.7  110.4   2.0197   4.4 ------	UNKNOWN                       
 36.8664 -77.4087    2.8  57.6 -167.3   4.0244   4.1 ------	UNKNOWN                       
353.5008 -25.8241    2.7  28.5  -91.2   1.1999   4.3 ------	UNKNOWN

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

Time interval of the image:
-0.088000 95.796000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 12.5428 -10.7939    0.5  14.4  -35.0   2.5619  22.9 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
1049.844600 1059.449900
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6751  22.0257    0.9  25.1  139.6   0.4351  12.3    2.4	Crab                          
 55.9853  41.4420    3.4  10.9 -111.4   0.0985   3.4 ------	UNKNOWN                       
 48.5340  15.4907    2.3  34.4 -150.7   0.1915   5.1 ------	UNKNOWN                       
 35.8685  -1.3182    1.9  55.1 -146.3   1.0127   5.9 ------	UNKNOWN

Plot creation:
Sat May 30 23:01:56 EDT 2015