batgrbproduct analysis for trigger=374210

batgrbproduct Analysis for Trigger=374210

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): Sun Jan 19 13:16:46 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger374210
======================================================================

  Trigger: 00374210      Segment: 000

  BAT Trigger Time: 278481207.808   [s; MET]
      Trigger Stop: 278481208.832   [s; MET]
               UTC: 2009-10-29T03:53:22.595560    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 60.1834083668177   Dec: -55.9938395285014  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9.18
     Image Trigger?:     NO
     Rate S/N Ratio:     17  [ if not an image trigger ]
     Image S/N Ratio:    9.18

  Flight Position:   [ source = BAT ]
    RA: 60.1834083668177   Dec: -55.9938395285014  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 60.1662512958901   Dec: -55.9531332276406  [deg; J2000]  
        { 04h 00m 39.9s , -55d 57' 11.3" }
         +/- 0.619877886964584 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.182488643881972 [arcmin] (formal 1-sigma fit error)
    SNR: 60.2315290821368
 
  Angular difference between Flight and Ground position is 2.509389 arcmin
 
  Partial Coding Fraction: 0.9921875    [ including projection effects ]

  Duration
     T90: 39.1799999475479 +/- 4.86097931840566
        Measured from: 1.02399998903275
                   to: 40.2039999365807     [s; relative to TRIGTIME]
     T50: 13.4519999027252 +/- 1.08071822949528
        Measured from: 14.7599999904633
                   to: 28.2119998931885     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 19.1199999451637     
                   to: 20.1199999451637     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -1.77200001478195     
                   to: 60.1959999799728     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.639923   1.778407   1.012000   0.180727
           0.040332   0.042179   0.037240   0.031985 [error]
 Peak      0.077312   0.084098   0.048748   0.010497
           0.005797   0.006212   0.005363   0.004167 [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 5.00e-07 7.27e-07 7.89e-07 1.60e-06 2.51e-06 3.61e-06   erg/cm2
              Error 2.87e-08 2.40e-08 3.81e-08 1.68e-07 8.67e-08 1.96e-07   erg/cm2
Peak flux Power-law 7.03e-01 5.94e-01 3.42e-01 2.94e-01 1.77e+00 1.93e+00   ph/cm2/s
              Error 8.53e-02 4.92e-02 4.30e-02 7.04e-02 1.46e-01 1.63e-01   ph/cm2/s
 
Fluence   Cutoff-PL 4.62e-07 7.51e-07 7.94e-07 8.60e-07 2.41e-06 2.87e-06   erg/cm2
              Error 3.61e-08 2.82e-08 4.05e-08 3.24e-07 1.06e-07 3.46e-07   erg/cm2
Peak flux Cutoff-PL 6.42e-01 6.58e-01 3.44e-01 1.02e-01 1.72e+00 1.75e+00   ph/cm2/s
              Error 9.63e-02 6.63e-02 5.00e-02 7.93e-02 1.50e-01 1.67e-01   ph/cm2/s
 
Fluence        Band 4.58e-07 7.48e-07 7.92e-07 9.80e-07 2.40e-06 2.98e-06   erg/cm2
              Error -------- -------- -------- -------- -------- --------   erg/cm2
Peak flux      Band 6.46e-01 6.53e-01 3.46e-01 1.12e-01 1.72e+00 1.76e+00   ph/cm2/s
              Error 9.61e-02 -------- -------- -------- -------- --------   ph/cm2/s

 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.883    0.065    -      -           4.40e-03 1.52e-04   56.440 57
CPL   1.460    0.276      61.3   17.1      7.22e-03 2.34e-03   48.840 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.795    0.144    -      -           1.29e-02 1.24e-03   63.200 57
CPL   0.926    0.650      53.2   18.3      4.00e-02 4.08e-02   56.540 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: 33.600000 sec.
T50 in the 50-300 keV band: 17.152000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   61.968   -1.772   60.196
T90    39.180    1.024   40.204
T50    13.452   14.760   28.212
Peak    1.000   19.120   20.120

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
   60.1663   -55.9531   0.0032    16.9672  -148.5710         4.0254195     60.232 TRIG_00374210                 
 
Foreground time interval of the image:
 -1.772  30.493 (delta_t =  32.265 [sec])
Background time interval of the image:
-126.707  -1.772 (delta_t = 124.935 [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

8 ms binning

From T100_start-3 s to T100_start+3 s

2 ms binning

From T100_start-1 s to T100_start+1 s

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   -1.772 sec. to   60.196 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.88333     ( -0.0646432   0.0652886 )
Norm@50keV  : 4.40134E-03    ( -0.000152602   0.000151933 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.44 using 59 PHA bins.
# Reduced chi-squared =         0.9902 for     57 degrees of freedom 
# Null hypothesis probability =   4.960667e-01
 
Photon flux (15-150 keV)    in 61.97 sec: 0.627217 ( -0.0216353  0.0217144 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.50738e-06 ( -8.64853e-08  8.6828e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -1.772 sec. to   60.196 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.46003     ( -0.284542   0.266707 )
Epeak [keV] : 61.3208      ( -9.10634 25.0402 )
Norm@50keV  : 7.21915E-03    ( -0.00189279   0.00279095 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.84 using 59 PHA bins.
# Reduced chi-squared =         0.8722 for     56 degrees of freedom 
# Null hypothesis probability =   7.401632e-01
 
Photon flux (15-150 keV)    in 61.97 sec: 0.606128 ( -0.024942  0.025036 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.40586e-06 ( -1.06297e-07  1.06595e-07 ) ergs/cm2

Band function

Time interval is from   -1.772 sec. to   60.196 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.45517   ( -0.268088   0.406795 )
beta        : -2.59907    ( 2.59381   0.614135 )
Epeak [keV] : 61.0003      ( -15.6155 25.07 )
Norm@50keV   : 7.26513E-03    ( -0.00192978   0.0052515 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.83 using 59 PHA bins.
# Reduced chi-squared =         0.8878 for     55 degrees of freedom 
# Null hypothesis probability =   7.080057e-01
 
Photon flux (15-150 keV)    in 61.97 sec: 0.606057 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.40173e-06 ( 0  0 ) ergs/cm2

Single BB

 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 12.4249  (  )
R^2/D10^2   : 0.122281  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         217.29 using 59 PHA bins.
# Reduced chi-squared =         3.8122 for     57 degrees of freedom 
# Null hypothesis probability =   1.486792e-20
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.480e-07   1.596e-08
25- 50  8.123e-07   3.098e-08
50-150  7.713e-07   5.794e-08
15-150  1.832e-06   6.569e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 91.9694       (-10.6957      13.1073)
Norm        : 2.75478       (-0.140433     0.155815)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.78 using 59 PHA bins.
# Reduced chi-squared =         0.8733 for     57 degrees of freedom 
# Null hypothesis probability =   7.402478e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.457e-07   2.748e-08
25- 50  7.574e-07   2.634e-08
50-150  1.169e-06   2.996e-07
15-150  2.372e-06   2.708e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.58703        (-0.711918      0.819749)
R1^2/D10^2  : 1.59382        (-0.640385      1.18522)
kT2 [keV]   : 18.9552        (-1.74015      2.31718)
R2^2/D10^2  : 2.00490E-02    (-0.0075963   0.0097944)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.58 using 59 PHA bins.
# Reduced chi-squared =         0.9742 for     55 degrees of freedom 
# Null hypothesis probability =   5.290186e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.549e-07   6.008e-08
25- 50  7.338e-07   5.856e-08
50-150  1.134e-06   1.038e-07
15-150  2.323e-06   1.853e-07

Peak spectrum fit

Power-law model

Time interval is from   19.120 sec. to   20.120 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.79529     ( -0.141793   0.146361 )
Norm@50keV  : 1.28516E-02    ( -0.00124778   0.00123107 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          63.20 using 59 PHA bins.
# Reduced chi-squared =          1.109 for     57 degrees of freedom 
# Null hypothesis probability =   2.667920e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.76770 ( -0.146446  0.146465 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.18333e-07 ( -1.16557e-08  1.18274e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   19.120 sec. to   20.120 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.926145     ( -0.703389   0.595906 )
Epeak [keV] : 53.1630      ( -9.77809 26.8419 )
Norm@50keV  : 4.00025E-02    ( -0.0213231   0.0602284 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.54 using 59 PHA bins.
# Reduced chi-squared =          1.010 for     56 degrees of freedom 
# Null hypothesis probability =   4.547193e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.71789 ( -0.14986  0.14995 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.08986e-07 ( -1.27285e-08  1.3217e-08 ) ergs/cm2

Band function

Time interval is from   19.120 sec. to   20.120 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.926149   ( -0.505736   0.777473 )
beta        : -10.0000    ( 10   1.77636e-15 )
Epeak [keV] : 53.1524      ( -9.77749 26.7665 )
Norm@50keV   : 4.00008E-02    ( -0.0213298   0.0603581 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.54 using 59 PHA bins.
# Reduced chi-squared =          1.028 for     55 degrees of freedom 
# Null hypothesis probability =   4.172864e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.72451 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.09105e-07 ( 0  0 ) ergs/cm2

Single BB

 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 11.1323  (-1.07643  1.19963)
R^2/D10^2   : 0.571425  (-0.180519   0.262254)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          79.02 using 59 PHA bins.
# Reduced chi-squared =          1.386 for     57 degrees of freedom 
# Null hypothesis probability =   2.839538e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.483e-08   2.045e-09
25- 50  4.258e-08   3.940e-09
50-150  3.008e-08   6.480e-09
15-150  8.749e-08   9.180e-09

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 93.2913       (-23.6057      38.7313)
Norm        : 8.02009       (-0.887699     1.02994)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.46 using 59 PHA bins.
# Reduced chi-squared =          1.008 for     57 degrees of freedom 
# Null hypothesis probability =   4.578898e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.094e-08   2.710e-09
25- 50  3.570e-08   3.180e-09
50-150  5.556e-08   2.128e-08
15-150  1.122e-07   2.279e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.13200        (-1.45659      1.72571)
R1^2/D10^2  : 3.23020        (-1.76257      4.76026)
kT2 [keV]   : 19.1031        (-4.14434      7.76498)
R2^2/D10^2  : 5.47519E-02    (-0.0410436   0.0976235)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.45 using 59 PHA bins.
# Reduced chi-squared =         0.9900 for     55 degrees of freedom 
# Null hypothesis probability =   4.956924e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.056e-08   8.658e-09
25- 50  3.632e-08   1.193e-08
50-150  5.255e-08   2.741e-08
15-150  1.094e-07   4.350e-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: 1.86398     ( -0.0609573   0.0614446 )
Norm@50keV  : 6.89981E-03    ( -0.00022321   0.000222397 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          45.21 using 59 PHA bins.
# Reduced chi-squared =         0.7931 for     57 degrees of freedom 
# Null hypothesis probability =   8.702679e-01
 
Photon flux (15-150 keV)    in 32.26 sec: 0.975412 ( -0.0321231  0.0322163 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.04636e-06 ( -6.63004e-08  6.65185e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.56713     ( -0.250985   0.236984 )
Epeak [keV] : 70.7468      ( -13.7036 78.9675 )
Norm@50keV  : 9.74427E-03    ( -0.00228661   0.00321964 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          40.56 using 59 PHA bins.
# Reduced chi-squared =         0.7243 for     56 degrees of freedom 
# Null hypothesis probability =   9.400127e-01
 
Photon flux (15-150 keV)    in 32.26 sec: 0.952168 ( -0.036558  0.036691 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.98856e-06 ( -8.04726e-08  8.04532e-08 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.56712   ( -0.234036   0.192787 )
beta        : -10.00000    ( 10   20 )
Epeak [keV] : 70.7336      ( -12.8527 78.8391 )
Norm@50keV   : 9.74247E-03    ( -0.00228984   0.00316582 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          40.56 using 59 PHA bins.
# Reduced chi-squared =         0.7375 for     55 degrees of freedom 
# Null hypothesis probability =   9.271062e-01
 
Photon flux (15-150 keV)    in 32.26 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.99944e-06 ( -1.99922e-06  -7.34883e-08 ) ergs/cm2

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

S(25-50 keV)  = 7.27e-07
S(50-100 keV) = 7.89e-07

T90 vs. Hardness ratio plot

T90                                   = 39.1799999475479 sec.
Hardness ratio (energy fluence ratio) = 1.08528

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.08445
Count Ratio (50-100 keV) / (15-25 keV) = 0.617102

Mask shadow pattern

IMX = -2.603424606581088E-01, IMY = 1.590946205857086E-01

TIME vs. PHA plot around the trigger time

TIME vs. DetID plot around the trigger time

100 us light curve (15-350 keV)

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:
-126.707400 -1.772000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 78.5724 -17.4475    2.8  49.4  158.2   1.5483   4.2 ------	UNKNOWN                       
319.7724 -47.0225    2.9  46.0  -21.3   0.8767   4.0 ------	UNKNOWN

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

Time interval of the image:
-1.772000 30.492580
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 60.1662 -55.9531    0.2  17.0 -148.6   4.0253  60.3 ------	UNKNOWN                       
335.3152 -51.2973    2.1  35.0  -19.7   0.4456   5.4 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
68.292590 962.303000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.5322 -40.5584   57.4  49.7 -137.1  -0.4876  -0.2    0.3	Vela X-1                      
 90.8484 -12.6014    3.3  49.4  158.3   4.6677   3.5 ------	UNKNOWN                       
332.8309 -43.6858    2.9  53.7    0.9   6.4799   4.7 ------	UNKNOWN                       
332.8504 -43.8681    3.5  53.6    0.8   6.4129   4.7 ------	UNKNOWN                       
106.1509 -43.7249    2.5  31.4 -155.9   2.2351   4.7 ------	UNKNOWN                       
121.6104 -18.2838    3.1  59.1 -166.2  15.1114   3.8 ------	UNKNOWN                       
310.2111 -68.5016    2.9  45.5  -33.8   3.5250   4.0 ------	UNKNOWN                       
144.6728 -57.4588    2.9  43.3 -114.0   9.9166   4.0 ------	UNKNOWN

Plot creation:
Sun May 31 02:43:29 EDT 2015