batgrbproduct analysis for trigger=445038

batgrbproduct Analysis for Trigger=445038

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 00:20:51 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger445038
======================================================================

  Trigger: 00445038      Segment: 000

  BAT Trigger Time: 318892252.992   [s; MET]
      Trigger Stop: 318892254.016   [s; MET]
               UTC: 2011-02-08T21:10:46.347120    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 22.4841525330872   Dec: -20.6284702440465  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.81
     Image Trigger?:     NO
     Rate S/N Ratio:     10.4880884817015  [ if not an image trigger ]
     Image S/N Ratio:    7.81

  Flight Position:   [ source = BAT ]
    RA: 22.4841525330872   Dec: -20.6284702440465  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 22.4871021227482   Dec: -20.5669009562798  [deg; J2000]  
        { 01h 29m 56.9s , -20d 34' 00.8" }
         +/- 1.82918642735477 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.01566019976205 [arcmin] (formal 1-sigma fit error)
    SNR: 12.837017604591
 
  Angular difference between Flight and Ground position is 3.697870 arcmin
 
  Partial Coding Fraction: 1    [ including projection effects ]

  Duration
     T90: 15.9840000867844 +/- 3.8721984041116
        Measured from: -1.06400001049042
                   to: 14.9200000762939     [s; relative to TRIGTIME]
     T50: 6.59200000762939 +/- 3.2880389390134
        Measured from: 0.48800003528595
                   to: 7.08000004291534     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.460000038146973     
                   to: 1.46000003814697     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -1.54399996995926     
                   to: 17.527999997139     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.170942   0.175066   0.088846   0.011231
           0.020892   0.020967   0.018633   0.016821 [error]
 Peak      0.018534   0.034971   0.021084   0.004359
           0.004964   0.005087   0.004456   0.003906 [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 4.87e-08 6.86e-08 7.17e-08 1.38e-07 2.32e-07 3.27e-07   erg/cm2
              Error 8.96e-09 9.27e-09 1.70e-08 6.42e-08 3.91e-08 8.33e-08   erg/cm2
Peak flux Power-law 2.01e-01 2.06e-01 1.49e-01 1.72e-01 6.22e-01 7.27e-01   ph/cm2/s
              Error 5.71e-02 3.89e-02 3.44e-02 7.74e-02 1.14e-01 1.37e-01   ph/cm2/s
 
Fluence   Cutoff-PL 4.53e-08 7.65e-08 6.77e-08 3.21e-08 2.11e-07 2.22e-07   erg/cm2
              Error 1.00e-08 1.29e-08 2.06e-08 8.00e-08 4.28e-08 9.31e-08   erg/cm2
Peak flux Cutoff-PL 1.44e-01 2.58e-01 1.55e-01 2.06e-02 5.76e-01 5.78e-01   ph/cm2/s
              Error 6.76e-02 5.57e-02 4.66e-02 4.04e-02 1.16e-01 1.20e-01   ph/cm2/s
 
Fluence        Band 4.50e-08 7.60e-08 6.76e-08 3.27e-08 2.11e-07 2.21e-07   erg/cm2
              Error -------- -------- -------- 5.03e-08 4.28e-08 7.43e-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    1.938    0.253    -      -           1.32e-03 2.28e-04   54.950 57
CPL   1.017    1.184      43.7    0.0      4.56e-03 0.00e+00   52.610 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.469    0.287    -      -           5.02e-03 9.48e-04   45.460 57
CPL  -0.918    2.067      55.3   19.6      9.72e-02 9.89e-01   38.600 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   19.072   -1.544   17.528
T90    15.984   -1.064   14.920
T50     6.592    0.488    7.080
Peak    1.000    0.460    1.460

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
   22.4871   -20.5669   0.0150    13.7464   158.6575         0.4851449     12.837 TRIG_00445038                 
 
Foreground time interval of the image:
 -1.544  17.528 (delta_t =  19.072 [sec])
Background time interval of the image:
-239.992  -1.544 (delta_t = 238.448 [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 1.024000

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 1.024000

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 1.024000

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   -1.544 sec. to   17.528 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.93751     ( -0.243375   0.262178 )
Norm@50keV  : 1.32485E-03    ( -0.000231542   0.000225383 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.95 using 59 PHA bins.
# Reduced chi-squared =         0.9641 for     57 degrees of freedom 
# Null hypothesis probability =   5.521947e-01
 
Photon flux (15-150 keV)    in 19.07 sec: 0.193231 ( -0.0256876  0.0256876 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.32425e-07 ( -3.83826e-08  3.97808e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -1.544 sec. to   17.528 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.01734     ( -1.35136   1.01702 )
Epeak [keV] : 43.7259      (   )
Norm@50keV  : 4.56210E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.61 using 59 PHA bins.
# Reduced chi-squared =         0.9395 for     56 degrees of freedom 
# Null hypothesis probability =   6.038672e-01
 
Photon flux (15-150 keV)    in 19.07 sec: 0.186810 ( -0.026363  0.026513 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.11233e-07 ( -4.0499e-08  4.51883e-08 ) ergs/cm2

Band function

Time interval is from   -1.544 sec. to   17.528 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.01740   ( -5.39714   1.56765 )
beta        : -10.0000    ( 10   3.55271e-15 )
Epeak [keV] : 43.7181      ( -15.6555 -43.7181 )
Norm@50keV   : 4.56138E-03    ( -0.00456137   0.0246578 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.61 using 59 PHA bins.
# Reduced chi-squared =         0.9566 for     55 degrees of freedom 
# Null hypothesis probability =   5.663643e-01
 
Photon flux (15-150 keV)    in 19.07 sec: 0.188312 ( 6.81169  -0.028089 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.11345e-07 ( -2.11212e-07  -4.08111e-08 ) ergs/cm2

Single BB

 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 9.99331  (-1.48132  1.76392)
R^2/D10^2   : 9.15977E-02  (-0.0419508   0.0764106)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.28 using 59 PHA bins.
# Reduced chi-squared =          1.058 for     57 degrees of freedom 
# Null hypothesis probability =   3.580851e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.552e-08   8.067e-09
25- 50  8.823e-08   1.704e-08
50-150  4.596e-08   1.821e-08
15-150  1.697e-07   3.230e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 70.0892       (-24.1019      47.9593)
Norm        : 0.954286       (-0.181131     0.227724)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.81 using 59 PHA bins.
# Reduced chi-squared =         0.9264 for     57 degrees of freedom 
# Null hypothesis probability =   6.330652e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.669e-08   8.801e-09
25- 50  7.432e-08   1.189e-08
50-150  9.555e-08   4.702e-08
15-150  2.166e-07   5.168e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.71115        (-2.97497      2.86102)
R1^2/D10^2  : 0.465132        (-0.336143      9.26987)
kT2 [keV]   : 16.8005        (-5.60706      17.5128)
R2^2/D10^2  : 8.96342E-03    (-0.008471   0.0443095)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.50 using 59 PHA bins.
# Reduced chi-squared =         0.9545 for     55 degrees of freedom 
# Null hypothesis probability =   5.708456e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.554e-08   2.530e-08
25- 50  7.511e-08   3.797e-08
50-150  8.911e-08   5.204e-08
15-150  2.098e-07   1.109e-07

Peak spectrum fit

Power-law model

Time interval is from    0.460 sec. to    1.460 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.46927     ( -0.284918   0.289956 )
Norm@50keV  : 5.02423E-03    ( -0.000951835   0.000944051 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          45.46 using 59 PHA bins.
# Reduced chi-squared =         0.7975 for     57 degrees of freedom 
# Null hypothesis probability =   8.643740e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.622168 ( -0.113551  0.113685 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.79154e-08 ( -9.81613e-09  1.00584e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.460 sec. to    1.460 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.917922     ( -2.46966   1.66466 )
Epeak [keV] : 55.2533      ( -10.5222 28.7521 )
Norm@50keV  : 9.71899E-02    ( -0.09762   1.88041 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          38.60 using 59 PHA bins.
# Reduced chi-squared =         0.6893 for     56 degrees of freedom 
# Null hypothesis probability =   9.631843e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.576154 ( -0.115227  0.116985 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.97259e-08 ( -9.2115e-09  1.08072e-08 ) ergs/cm2

Band function

Time interval is from    0.460 sec. to    1.460 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 0.879036   ( -0.772271   1.53831 )
beta        : -10.00000    ( 10   1.83843e-07 )
Epeak [keV] : 55.4663      ( -10.0395 12.7542 )
Norm@50keV   : 9.26231E-02    ( -0.0161421   1.89636 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          38.60 using 59 PHA bins.
# Reduced chi-squared =         0.7019 for     55 degrees of freedom 
# Null hypothesis probability =   9.542552e-01
 
Photon flux (15-150 keV)    in 1 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.12714e-08 ( 0  0 ) ergs/cm2

Single BB

 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 13.6618  (-2.23262  2.77445)
R^2/D10^2   : 0.106435  (-0.0517228   0.0939156)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          38.87 using 59 PHA bins.
# Reduced chi-squared =         0.6820 for     57 degrees of freedom 
# Null hypothesis probability =   9.683272e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.205e-09   1.407e-09
25- 50  1.526e-08   4.175e-09
50-150  1.851e-08   7.478e-09
15-150  3.797e-08   1.149e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.357       (-109.017      -199.357)
Norm        : 2.57662       (-0.462563     0.518757)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.73 using 59 PHA bins.
# Reduced chi-squared =         0.7672 for     57 degrees of freedom 
# Null hypothesis probability =   9.016296e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.416e-09   3.743e-09
25- 50  1.234e-08   7.060e-09
50-150  2.707e-08   1.567e-08
15-150  4.583e-08   2.599e-08

Double BB

------------------------------------------------------------
#Fit statistic : Chi-Squared =          38.54 using 59 PHA bins.
#Fit statistic : Chi-Squared =          38.39 using 59 PHA bins.
#Fit statistic : Chi-Squared =          38.38 using 59 PHA bins.
#Fit statistic : Chi-Squared =          38.32 using 59 PHA bins.
# Reduced chi-squared =         0.7006 for     55 degrees of freedom 
# Reduced chi-squared =         0.6980 for     55 degrees of freedom 
# Reduced chi-squared =         0.6978 for     55 degrees of freedom 
# Reduced chi-squared =         0.6967 for     55 degrees of freedom 
# Null hypothesis probability =   9.550490e-01
# Null hypothesis probability =   9.566791e-01
# Null hypothesis probability =   9.568441e-01
# Null hypothesis probability =   9.574803e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.614e-09   1.034e-08
25- 50  1.499e-08   5.570e-08
50-150  2.079e-08   2.399e-07
15-150  4.039e-08   3.055e-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: 1.93751     ( -0.243375   0.262178 )
Norm@50keV  : 1.32485E-03    ( -0.000231542   0.000225383 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.95 using 59 PHA bins.
# Reduced chi-squared =         0.9641 for     57 degrees of freedom 
# Null hypothesis probability =   5.521947e-01
 
Photon flux (15-150 keV)    in 19.07 sec: 0.193231 ( -0.0256876  0.0256876 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.32425e-07 ( -3.83826e-08  3.97808e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.01734     ( -1.35136   1.01702 )
Epeak [keV] : 43.7259      (   )
Norm@50keV  : 4.56210E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.61 using 59 PHA bins.
# Reduced chi-squared =         0.9395 for     56 degrees of freedom 
# Null hypothesis probability =   6.038672e-01
 
Photon flux (15-150 keV)    in 19.07 sec: 0.186810 ( -0.026363  0.026513 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.11233e-07 ( -4.0499e-08  4.51883e-08 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.01740   ( -5.39714   1.56765 )
beta        : -10.0000    ( 10   20 )
Epeak [keV] : 43.7181      ( -15.6555 -43.7181 )
Norm@50keV   : 4.56138E-03    ( -0.00456137   0.0246578 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.61 using 59 PHA bins.
# Reduced chi-squared =         0.9566 for     55 degrees of freedom 
# Null hypothesis probability =   5.663643e-01
 
Photon flux (15-150 keV)    in 19.07 sec: 0.188312 ( 6.81169  -0.028089 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.11345e-07 ( -2.11212e-07  -4.08111e-08 ) ergs/cm2

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

S(25-50 keV)  = 6.86e-08
S(50-100 keV) = 7.17e-08

T90 vs. Hardness ratio plot

T90                                   = 15.9840000867844 sec.
Hardness ratio (energy fluence ratio) = 1.04519

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.02413
Count Ratio (50-100 keV) / (15-25 keV) = 0.519744

Mask shadow pattern

IMX = -2.278559744226316E-01, IMY = -8.903192481110719E-02

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000

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:
-239.992000 -1.544000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 39.5332 -17.6500    2.2  27.1  129.6   1.1343   5.2 ------	UNKNOWN                       
 31.5338 -10.0684    2.5  18.7  111.5   0.8195   4.7 ------	UNKNOWN                       
  3.5372 -34.2607    2.2  24.9 -140.5   0.8850   5.2 ------	UNKNOWN

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

Time interval of the image:
-1.544000 17.528000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 22.4871 -20.5670    0.9  13.7  158.7   0.4852  12.8 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
63.108590 962.143000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
  9.2687 -35.4619    2.8  18.9 -139.7   1.5638   4.1 ------	UNKNOWN

Plot creation:
Sat May 30 22:59:56 EDT 2015