batgrbproduct analysis for trigger=421386

batgrbproduct Analysis for Trigger=421386

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): Fri Jan 17 18:38:45 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger421386
======================================================================

  Trigger: 00421386      Segment: 000

  BAT Trigger Time: 295003248   [s; MET]
      Trigger Stop: 295003312   [s; MET]
               UTC: 2010-05-08T09:20:42.221700    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 76.2500038130658   Dec: -20.7209133097938  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.47
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    7.47

  Flight Position:   [ source = BAT ]
    RA: 76.2500038130658   Dec: -20.7209133097938  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 76.2623306053277   Dec: -20.7385461703544  [deg; J2000]  
        { 05h 05m 03.0s , -20d 44' 18.8" }
         +/- 2.05586667055115 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.18039143244673 [arcmin] (formal 1-sigma fit error)
    SNR: 10.8638245466385
 
  Angular difference between Flight and Ground position is 1.264037 arcmin
 
  Partial Coding Fraction: 0.703125    [ including projection effects ]

  Duration
     T90: 49.2599999308586 +/- 7.42963064686218
        Measured from: 3.53200000524521
                   to: 52.7919999361038     [s; relative to TRIGTIME]
     T50: 21.7879999876022 +/- 10.8364505686661
        Measured from: 8.43599998950958
                   to: 30.2239999771118     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 30.6000000238419     
                   to: 31.6000000238419     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -1.53200000524521     
                   to: 58.3759999871254     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.155092   0.411623   0.352586   0.162341
           0.049021   0.050998   0.046172   0.042644 [error]
 Peak      0.012240   0.017449   0.024116   0.004880
           0.006168   0.006458   0.005995   0.005533 [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 7.29e-08 1.59e-07 2.74e-07 1.09e-06 7.50e-07 1.59e-06   erg/cm2
              Error 1.91e-08 2.50e-08 4.36e-08 3.92e-07 1.11e-07 4.17e-07   erg/cm2
Peak flux Power-law 1.15e-01 1.46e-01 1.35e-01 2.19e-01 4.70e-01 6.15e-01   ph/cm2/s
              Error 7.39e-02 5.75e-02 4.63e-02 1.70e-01 1.54e-01 2.03e-01   ph/cm2/s
 
Fluence   Cutoff-PL 6.83e-08 1.64e-07 2.82e-07 6.80e-07 7.34e-07 1.19e-06   erg/cm2
              Error 2.22e-08 2.90e-08 4.96e-08 7.42e-07 1.21e-07 5.75e-07   erg/cm2
Peak flux Cutoff-PL 1.05e-01 1.48e-01 1.40e-01 1.63e-01 4.63e-01 5.57e-01   ph/cm2/s
              Error 8.60e-02 6.17e-02 5.55e-02 1.49e-01 1.60e-01 2.42e-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    1.218    0.238    -      -           1.24e-03 1.68e-04   35.610 57
CPL   0.889    0.813     180.0    0.0      1.78e-03 2.31e-03   35.230 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.111    0.583    -      -           4.05e-03 1.28e-03   64.030 57
CPL   0.795    1.118     224.3    0.0      5.56e-03 4.03e-02   63.960 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: 31.104000 sec.
T50 in the 50-300 keV band: 19.712000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   59.908   -1.532   58.376
T90    49.260    3.532   52.792
T50    21.788    8.436   30.224
Peak    1.000   30.600   31.600

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
   76.2623   -20.7385   0.0177    34.1411    -4.7471         1.1209384     10.864 TRIG_00421386                 
 
Foreground time interval of the image:
 -1.532  58.376 (delta_t =  59.908 [sec])
Background time interval of the image:
-239.000  -1.532 (delta_t = 237.468 [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 64.000000

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 64.000000

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 64.000000

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   -1.532 sec. to   58.376 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.21834     ( -0.241159   0.234745 )
Norm@50keV  : 1.23973E-03    ( -0.000167895   0.000167811 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          35.61 using 59 PHA bins.
# Reduced chi-squared =         0.6247 for     57 degrees of freedom 
# Null hypothesis probability =   9.882331e-01
 
Photon flux (15-150 keV)    in 59.91 sec: 0.145906 ( -0.0205449  0.0206219 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.49678e-07 ( -1.10361e-07  1.11331e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from   -1.532 sec. to   58.376 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.888819     ( -1.09111   0.534717 )
Epeak [keV] : 179.989      ( -180.008 -180.008 )
Norm@50keV  : 1.78334E-03    ( -0.000690971   0.00393894 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          35.23 using 59 PHA bins.
# Reduced chi-squared =         0.6291 for     56 degrees of freedom 
# Null hypothesis probability =   9.864954e-01
 
Photon flux (15-150 keV)    in 59.91 sec: 0.143866 ( -0.021354  0.021339 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.33903e-07 ( -1.22342e-07  1.19323e-07 ) ergs/cm2

Band function

Time interval is from   -1.532 sec. to   58.376 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.77153   ( -4.77153   -4.77153 )
beta        : -1.41013    ( -0.337435   0.304764 )
Epeak [keV] : 33.3560      ( -10.8873 8.04818 )
Norm@50keV   : 13.7626    ( -1.85359   376937 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          34.29 using 59 PHA bins.
# Reduced chi-squared =         0.6235 for     55 degrees of freedom 
# Null hypothesis probability =   9.871451e-01
 
Photon flux (15-150 keV)    in 59.91 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]    : 18.1312  (-3.05137  3.93787)
R^2/D10^2   : 9.17705E-03  (-0.00443095   0.00797359)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          44.64 using 59 PHA bins.
# Reduced chi-squared =         0.7831 for     57 degrees of freedom 
# Null hypothesis probability =   8.830353e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.610e-08   1.063e-08
25- 50  1.679e-07   4.002e-08
50-150  4.013e-07   9.592e-08
15-150  6.053e-07   1.175e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (      )
Norm        : 0.609518       (-0.0839626     0.0839501)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          40.70 using 59 PHA bins.
# Reduced chi-squared =         0.7140 for     57 degrees of freedom 
# Null hypothesis probability =   9.493309e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.093e-08   5.158e-08
25- 50  1.749e-07   9.897e-08
50-150  3.836e-07   2.144e-07
15-150  6.495e-07   3.622e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 9.90636        (-3.97782      4.86464)
R1^2/D10^2  : 4.61428E-02        (-0.0301884      0.155294)
kT2 [keV]   : 41.5402        (-36.5104      -42.5041)
R2^2/D10^2  : 4.80133E-04    (-0.000438736   0.0032756)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          34.33 using 59 PHA bins.
# Reduced chi-squared =         0.6241 for     55 degrees of freedom 
# Null hypothesis probability =   9.870021e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.130e-08   3.466e-08
25- 50  1.781e-07   9.654e-08
50-150  4.986e-07   2.707e-07
15-150  7.380e-07   3.819e-07

Peak spectrum fit

Power-law model

Time interval is from   30.600 sec. to   31.600 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.11132     ( -0.604743   0.561638 )
Norm@50keV  : 4.05151E-03    ( -0.00128365   0.00126821 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.03 using 59 PHA bins.
# Reduced chi-squared =          1.123 for     57 degrees of freedom 
# Null hypothesis probability =   2.435193e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.470487 ( -0.152797  0.154569 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.22079e-08 ( -1.40126e-08  1.42245e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   30.600 sec. to   31.600 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.794875     ( -3.03123   -0.794945 )
Epeak [keV] : 224.317      ( -224.512 -224.512 )
Norm@50keV  : 5.55566E-03    ( -0.00269527   0.0778379 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          63.96 using 59 PHA bins.
# Reduced chi-squared =          1.142 for     56 degrees of freedom 
# Null hypothesis probability =   2.172476e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.463192 ( -0.160176  0.159156 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.17046e-08 ( -1.4666e-08  1.45596e-08 ) ergs/cm2

Band function

Time interval is from   30.600 sec. to   31.600 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.634336   ( 0.714416   2.84892 )
beta        : -8.85492    ( 8.7393   8.7393 )
Epeak [keV] : 166.587      ( -193.061 -193.061 )
Norm@50keV   : 6.54228E-03    ( -0.00185329   0.0130294 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          63.98 using 59 PHA bins.
# Reduced chi-squared =          1.163 for     55 degrees of freedom 
# Null hypothesis probability =   1.904741e-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]    : 22.4950  (-7.99527  14.8197)
R^2/D10^2   : 1.51680E-02  (-0.0151555   0.0477414)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.64 using 59 PHA bins.
# Reduced chi-squared =          1.151 for     57 degrees of freedom 
# Null hypothesis probability =   2.024401e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.406e-09   9.275e-10
25- 50  7.531e-09   4.603e-09
50-150  2.848e-08   1.901e-08
15-150  3.742e-08   2.239e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (-106.088      -199.363)
Norm        : 1.96903       (-0.631247     0.631247)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.83 using 59 PHA bins.
# Reduced chi-squared =          1.155 for     57 degrees of freedom 
# Null hypothesis probability =   1.977526e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.903e-09   3.031e-09
25- 50  9.432e-09   5.635e-09
50-150  2.068e-08   1.354e-08
15-150  3.502e-08   2.157e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.56693        (-7.56867      -7.56867)
R1^2/D10^2  : 0.263421        (-0.263266      -0.263266)
kT2 [keV]   : 31.5791        (-31.5871      -31.5871)
R2^2/D10^2  : 4.53556E-03    (-0.00453183   0.0288449)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          63.79 using 59 PHA bins.
# Reduced chi-squared =          1.160 for     55 degrees of freedom 
# Null hypothesis probability =   1.948558e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.294e-09   2.207e-09
25- 50  8.450e-09   4.661e-09
50-150  3.064e-08   1.863e-08
15-150  4.238e-08   2.246e-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: 1.21834     ( -0.241159   0.234745 )
Norm@50keV  : 1.23973E-03    ( -0.000167895   0.000167811 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          35.61 using 59 PHA bins.
# Reduced chi-squared =         0.6247 for     57 degrees of freedom 
# Null hypothesis probability =   9.882331e-01
 
Photon flux (15-150 keV)    in 59.91 sec: 0.145906 ( -0.0205449  0.0206219 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.49678e-07 ( -1.10361e-07  1.11331e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.888819     ( -1.09111   0.534717 )
Epeak [keV] : 179.989      ( -180.008 -180.008 )
Norm@50keV  : 1.78334E-03    ( -0.000690971   0.00393894 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          35.23 using 59 PHA bins.
# Reduced chi-squared =         0.6291 for     56 degrees of freedom 
# Null hypothesis probability =   9.864954e-01
 
Photon flux (15-150 keV)    in 59.91 sec: 0.143866 ( -0.021354  0.021339 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.33903e-07 ( -1.22342e-07  1.19323e-07 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.77153   ( -4.77153   -4.77153 )
beta        : -1.41013    ( -0.337435   0.304764 )
Epeak [keV] : 33.3560      ( -10.8873 8.04818 )
Norm@50keV   : 13.7626    ( -1.85359   376937 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          34.29 using 59 PHA bins.
# Reduced chi-squared =         0.6235 for     55 degrees of freedom 
# Null hypothesis probability =   9.871451e-01
 
Photon flux (15-150 keV)    in 59.91 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)  = 1.59e-07
S(50-100 keV) = 2.74e-07

T90 vs. Hardness ratio plot

T90                                   = 49.2599999308586 sec.
Hardness ratio (energy fluence ratio) = 1.72327

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 2.65406
Count Ratio (50-100 keV) / (15-25 keV) = 2.2734

Mask shadow pattern

IMX = 6.757725958994587E-01, IMY = 5.611813211728716E-02

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000

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:
-239.000000 -1.532000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
337.0908 -40.8013    2.9  50.8  153.9   3.2039   4.0 ------	UNKNOWN                       
 25.1188 -52.0420    2.5  23.8  116.4   1.0755   4.6 ------	UNKNOWN                       
 85.1303   0.2865    2.5  53.0  -23.6   2.4903   4.5 ------	UNKNOWN

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

Time interval of the image:
-1.532000 58.376000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 15.4628 -45.2482    2.4  23.9  139.5   0.4783   4.8 ------	UNKNOWN                       
 76.2624 -20.7385    1.1  34.1   -4.7   1.1213  10.8 ------	UNKNOWN                       
  2.2354   5.0298    2.4  50.7 -138.1   1.8441   4.7  330.2	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
131.500590 963.062600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6215  22.0205    0.3  43.3  -38.7  33.6821  34.2    0.7	Crab                          
 93.0113  -1.3419    3.5  25.3   -6.4   1.6893   3.4 ------	UNKNOWN

Plot creation:
Sun May 31 01:38:30 EDT 2015