batgrbproduct analysis for trigger=118749

batgrbproduct Analysis for Trigger=118749

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): Wed Jan 22 22:02:34 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger118749
======================================================================

  Trigger: 00118749      Segment: 000

  BAT Trigger Time: 137304018.752   [s; MET]
      Trigger Stop: 137304018.88   [s; MET]
               UTC: 2005-05-09T04:00:19.237760    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 189.055782430247   Dec: 29.000309642558  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    6
     Image Trigger?:     NO
     Rate S/N Ratio:     9.59166304662544  [ if not an image trigger ]
     Image S/N Ratio:    6

  Flight Position:   [ source = BAT ]
    RA: 189.055782430247   Dec: 29.000309642558  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 189.120476300044   Dec: 29.0014195744892  [deg; J2000]  
        { 12h 36m 28.9s , +29d 00' 05.1" }
         +/- 2.46718891236298 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.43957963061827 [arcmin] (formal 1-sigma fit error)
    SNR: 8.37200020885544
 
  Angular difference between Flight and Ground position is 3.395577 arcmin
 
  Partial Coding Fraction: 1.015625    [ including projection effects ]

  Duration
     T90: 0.0240000188350677 +/- 0.00894426338008669
        Measured from: 0
                   to: 0.0240000188350677     [s; relative to TRIGTIME]
     T50: 0.0120000243186951 +/- 0.00565684464005017
        Measured from: 0.00799998641014099
                   to: 0.0200000107288361     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.483999997377396     
                   to: 0.516000002622604     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0     
                   to: 0.0279999971389771     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.002447   0.005965   0.004142   0.002705
           0.000937   0.001119   0.001079   0.000721 [error]
 Peak      0.003011   0.008137   0.009532   0.003013
           0.004477   0.004761   0.003993   0.003298 [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 7.42e-10 1.56e-09 2.58e-09 9.68e-09 7.13e-09 1.46e-08   erg/cm2
              Error 3.06e-10 4.23e-10 8.05e-10 6.36e-09 2.04e-09 6.99e-09   erg/cm2
Peak flux Power-law 4.08e-02 5.66e-02 5.82e-02 1.09e-01 1.90e-01 2.65e-01   ph/cm2/s
              Error 4.78e-02 4.69e-02 4.43e-02 4.46e-01 1.46e-01 1.73e-01   ph/cm2/s
 
Fluence   Cutoff-PL 3.90e-10 2.16e-09 2.88e-09 4.54e-10 5.85e-09 5.88e-09   erg/cm2
              Error 3.72e-10 6.80e-10 1.02e-09 1.82e-09 1.82e-09 2.45e-09   erg/cm2
Peak flux Cutoff-PL 4.31e-02 5.80e-02 5.77e-02 1.03e-01 1.92e-01 2.63e-01   ph/cm2/s
              Error 4.78e-02 4.83e-02 3.35e-02 1.96e-01 1.01e-01 1.86e-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    1.275    0.402    -      -           2.56e-02 6.58e-03   55.540 57
CPL  -2.475    4.729      58.1   25.3      1.98e+00 0.00e+00   50.430 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.960    1.241    -      -           1.66e-03 1.25e-03   39.120 57
CPL   4.337    0.000     491.1    0.0      3.60e-05 0.00e+00   38.670 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    0.028    0.000    0.028
T90     0.024    0.000    0.024
T50     0.012    0.008    0.020
Peak    1.000   -0.484    0.516

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
  189.1205    29.0014   0.0229     7.9627   -46.5137         0.0159783      8.372 TRIG_00118749                 
 
Foreground time interval of the image:
  0.000   0.028 (delta_t =   0.028 [sec])
Background time interval of the image:
-299.752   0.000 (delta_t = 299.752 [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 0.128000

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 0.128000

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 0.128000

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    0.000 sec. to    0.028 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.27542     ( -0.405249   0.399023 )
Norm@50keV  : 2.55981E-02    ( -0.00658928   0.00656488 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.54 using 59 PHA bins.
# Reduced chi-squared =         0.9743 for     57 degrees of freedom 
# Null hypothesis probability =   5.300914e-01
 
Photon flux (15-150 keV)    in 0.028 sec: 3.04059 ( -0.779492  0.780738 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.12555e-09 ( -2.01506e-09  2.0692e-09 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.000 sec. to    0.028 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.47455     ( -6.69073   2.76826 )
Epeak [keV] : 58.0686      ( -9.94937 40.5869 )
Norm@50keV  : 1.97788    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.43 using 59 PHA bins.
# Reduced chi-squared =         0.9005 for     56 degrees of freedom 
# Null hypothesis probability =   6.848795e-01
 
Photon flux (15-150 keV)    in 0.028 sec: 2.76626 ( -0.78962  0.80783 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.85096e-09 ( -1.62378e-09  2.01424e-09 ) ergs/cm2

Band function

Time interval is from    0.000 sec. to    0.028 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 1.97789   ( -1.16861   4.3977 )
beta        : -10.00000    ( 10   1.56015e-06 )
Epeak [keV] : 59.5369      ( -10.5294 40.38 )
Norm@50keV   : 1.14456    ( -0.275118   18.9311 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.49 using 59 PHA bins.
# Reduced chi-squared =         0.9179 for     55 degrees of freedom 
# Null hypothesis probability =   6.475213e-01
 
Photon flux (15-150 keV)    in 0.028 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]    : 15.6270  (-2.92008  4.12848)
R^2/D10^2   : 0.353302  (-0.202885   0.37557)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.59 using 59 PHA bins.
# Reduced chi-squared =         0.8875 for     57 degrees of freedom 
# Null hypothesis probability =   7.127646e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.020e-10   2.279e-10
25- 50  2.070e-09   1.012e-09
50-150  3.500e-09   1.793e-09
15-150  6.072e-09   2.537e-09

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.362       (-100.843      -199.363)
Norm        : 12.5503       (-3.20389     3.20953)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.85 using 59 PHA bins.
# Reduced chi-squared =         0.9799 for     57 degrees of freedom 
# Null hypothesis probability =   5.181791e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.750e-10   5.321e-10
25- 50  1.683e-09   1.009e-09
50-150  3.692e-09   2.215e-09
15-150  6.250e-09   3.742e-09

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 1.99246        (-1.96999      19.1841)
R1^2/D10^2  : 263.940        (-316.448      -316.448)
kT2 [keV]   : 15.8523        (-3.0893      -15.8639)
R2^2/D10^2  : 0.331930    (-0.330975   0.386009)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.46 using 59 PHA bins.
# Reduced chi-squared =         0.9175 for     55 degrees of freedom 
# Null hypothesis probability =   6.485166e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.496e-10   3.196e-10
25- 50  2.022e-09   1.138e-09
50-150  3.535e-09   2.201e-09
15-150  6.107e-09   3.141e-09

Peak spectrum fit

Power-law model

Time interval is from   -0.484 sec. to    0.516 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.960004     ( -1.47726   1.00524 )
Norm@50keV  : 1.65738E-03    ( -0.00165737   0.000845336 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          39.12 using 59 PHA bins.
# Reduced chi-squared =         0.6863 for     57 degrees of freedom 
# Null hypothesis probability =   9.661161e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.190461 ( -0.190473  0.101143 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.81848e-08 ( -9.61456e-09  9.80714e-09 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.484 sec. to    0.516 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 4.33706     (     )
Epeak [keV] : 491.057      (   )
Norm@50keV  : 3.59902E-05    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          38.67 using 59 PHA bins.
# Reduced chi-squared =         0.6906 for     56 degrees of freedom 
# Null hypothesis probability =   9.624741e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.192036 ( -0.101603  0.099599 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.81598e-08 ( -9.5798e-09  9.6751e-09 ) ergs/cm2

Band function

Time interval is from   -0.484 sec. to    0.516 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.841772   ( 0.84153   0.84153 )
beta        : -0.960105    ( 0.959947   1.47702 )
Epeak [keV] : 27.9274      ( -28.0329 -28.0329 )
Norm@50keV   : 2.61807E-03    ( -0.00261698   3164.33 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          39.12 using 59 PHA bins.
# Reduced chi-squared =         0.7113 for     55 degrees of freedom 
# Null hypothesis probability =   9.479479e-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]    : 22.2245  (-12.0658  -22.3024)
R^2/D10^2   : 6.36684E-03  (-0.00626413   0.0735068)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          40.47 using 59 PHA bins.
# Reduced chi-squared =         0.7101 for     57 degrees of freedom 
# Null hypothesis probability =   9.520439e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.793e-10   4.172e-10
25- 50  3.082e-09   2.088e-09
50-150  1.137e-08   7.690e-09
15-150  1.503e-08   1.089e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (-199.363      -199.363)
Norm        : 0.788507       (-0.413007     0.413007)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          40.31 using 59 PHA bins.
# Reduced chi-squared =         0.7072 for     57 degrees of freedom 
# Null hypothesis probability =   9.539555e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.964e-09   1.425e-09
25- 50  3.777e-09   2.580e-09
50-150  8.284e-09   5.745e-09
15-150  1.402e-08   9.420e-09

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 0.664873        (-0.666206      78.9586)
R1^2/D10^2  : 1.53743E+08        (-1.42481e+08      5.27862e+12)
kT2 [keV]   : 24.8950        (-13.6223      -25.1087)
R2^2/D10^2  : 4.35946E-03    (-0.00420078   0.00970226)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          38.39 using 59 PHA bins.
# Reduced chi-squared =         0.6981 for     55 degrees of freedom 
# Null hypothesis probability =   9.566516e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.780e-10   3.421e-10
25- 50  2.663e-09   1.862e-09
50-150  1.224e-08   8.385e-09
15-150  1.549e-08   1.044e-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: 1.27542     ( -0.405249   0.399023 )
Norm@50keV  : 2.55981E-02    ( -0.00658928   0.00656488 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.54 using 59 PHA bins.
# Reduced chi-squared =         0.9743 for     57 degrees of freedom 
# Null hypothesis probability =   5.300914e-01
 
Photon flux (15-150 keV)    in 0.028 sec: 3.04059 ( -0.779492  0.780738 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.12555e-09 ( -2.01506e-09  2.0692e-09 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.47455     ( -6.69073   2.76826 )
Epeak [keV] : 58.0686      ( -9.94937 40.5869 )
Norm@50keV  : 1.97788    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.43 using 59 PHA bins.
# Reduced chi-squared =         0.9005 for     56 degrees of freedom 
# Null hypothesis probability =   6.848795e-01
 
Photon flux (15-150 keV)    in 0.028 sec: 2.76626 ( -0.78962  0.80783 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.85096e-09 ( -1.62378e-09  2.01424e-09 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 1.97789   ( -1.16861   4.3977 )
beta        : -10.00000    ( 10   1.56015e-06 )
Epeak [keV] : 59.5369      ( -10.5294 40.38 )
Norm@50keV   : 1.14456    ( -0.275118   18.9311 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.49 using 59 PHA bins.
# Reduced chi-squared =         0.9179 for     55 degrees of freedom 
# Null hypothesis probability =   6.475213e-01
 
Photon flux (15-150 keV)    in 0.028 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)  = 1.56e-09
S(50-100 keV) = 2.58e-09

T90 vs. Hardness ratio plot

T90                                   = 0.0240000188350677 sec.
Hardness ratio (energy fluence ratio) = 1.65385

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 2.43768
Count Ratio (50-100 keV) / (15-25 keV) = 1.69268

Mask shadow pattern

IMX = 9.626120033947863E-02, IMY = 1.014867399437389E-01

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.128000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.128000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.128000

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:
-299.752000 0.000000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
201.2637  36.7268    2.6  19.2  -17.8   0.7126   4.5 ------	UNKNOWN                       
132.7852   8.0696    3.3  55.2 -145.3   4.4709   3.6 ------	UNKNOWN

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

Time interval of the image:
0.000000 0.028000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
216.5109   5.1121    2.6  31.5   66.1   0.0154   4.4 ------	UNKNOWN                       
189.1205  29.0014    1.4   8.0  -46.5   0.0160   8.4 ------	UNKNOWN                       
221.6468  49.0151    2.3  38.4  -15.1   0.0137   5.1 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
36.748600 302.261800
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
139.8005  -6.2636    3.5  59.0 -166.1   3.8537   3.3 ------	UNKNOWN                       
153.6555  58.2780    3.0  38.1  -77.2   1.8333   3.9 ------	UNKNOWN

Plot creation:
Sun May 31 16:47:28 EDT 2015