GRB070129

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: Mon Jan 20 11:47:43 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger258408
======================================================================

  Trigger: 00258408      Segment: 000

  BAT Trigger Time: 191806512   [s; MET]
      Trigger Stop: 191806576   [s; MET]
               UTC: 2007-01-29T23:35:10.269080    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 37.0138693588457   Dec: 11.6974043453265  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.28
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    7.28

  Analysis Position:   [ source = BAT ]
    RA: 37.0138693588457   Dec: 11.6974043453265  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 37.0139   Dec: 11.6974  [deg; J2000]
        { 02h 28m 03.3s , +11d 41' 50.6" }
        +/- 2.45655729298 [arcmin] (estimated 90% radius based on SNR)
    SNR: 8.42491143666
 
 
  Angular difference between the analysis and refined position is 0.001819 arcmin
 
  Partial Coding Fraction: 0.4257812    [ including projection effects ]

  Duration
     T90: 459.748000025749 +/- 25.2120545784732
        Measured from: -96.7120000123978
                   to: 363.036000013351     [s; relative to TRIGTIME]
     T50: 273.296000003815 +/- 25.2466089568738
        Measured from: 39.972000002861
                   to: 313.268000006676     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 310.567999988794     
                   to: 311.567999988794     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -130.611999988556     
                   to: 373.888000011444     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     2.182987   2.276878   1.114787   0.198249
           0.134575   0.141483   0.126909   0.114768 [error]
 Peak      0.030356   0.024540   0.015055   0.009168
           0.005085   0.005223   0.004722   0.003735 [error]

     [ fluence units of on-axis counts / fully illuminated detector ] 

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100  504.500 -130.612  373.888
T90   459.748  -96.712  363.036
T50   273.296   39.972  313.268
Peak    1.000  310.568  311.568
 
 
====== Spectral Analysis Summary =====================================
 
Model      : spectral model: simple power-law (PL) and cutoff power-law (CPL)
Ph_index   : photon index: E^{Ph_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 both the PL model and CPL model
Nomr_90err : 90% error of the normalization
chi2       : Chi-Squared
dof        : degree of freedo
 
=== Time-averaged spectral analysis ===
(Best model with acceptable fit: PL)
 
Model Ph_index Ph_90err_low Ph_90err_hi  Epeak  Epeak_90err_low  Epeak_90err_hi  Norm       Nomr_90err_low    Norm_90err_hi    chi2    dof
PL      -1.990    -0.152      0.146       -           -               -         6.45e-04     -6.13e-05          6.02e-05      65.570   57
CPL     -1.635    -0.523      0.706       43.502     -26.455       -43.502      1.03e-03     -5.32e-04          1.55e-03      64.610   56
 
 
=== 1-s peak spectral analysis ===
(Best model with acceptable fit: PL)
 
Model Ph_index Ph_90err_low Ph_90err_hi  Epeak  Epeak_90err_low  Epeak_90err_hi  Norm       Nomr_90err_low    Norm_90err_hi    chi2    dof
PL      -1.913     -0.410     0.367       -           -               -         3.86e-03     -1.08e-03          1.04e-03      64.640   57
CPL     -1.387     -0.778     1.845       46.073      N/A           N/A         8.03e-03        N/A               N/A         64.240   56
 
 
=== 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         PL   6.60e-07  9.01e-07  9.07e-07  1.66e-06  3.00e-06  4.12e-06   erg/cm2
      90%_error_low -7.14e-08 -6.64e-08 -1.19e-07 -4.00e-07 -2.67e-07 -5.33e-07   erg/cm2
      90%_error_hi   7.33e-08  6.64e-08  1.21e-07  4.81e-07  2.72e-07  5.96e-07   erg/cm2
Peak flux       PL   2.36e-01  1.86e-01  9.91e-02  7.65e-02  5.56e-01  5.98e-01   ph/cm2/s
      90%_error_low -6.52e-02 -3.97e-02 -3.49e-02 -4.11e-02 -1.17e-01 -1.30e-01   ph/cm2/s
      90%_error_hi   6.74e-02  3.95e-02  3.64e-02  6.28e-02  1.17e-01  1.32e-01   ph/cm2/s
 
Fluence        CPL   6.36e-07  9.36e-07  8.92e-07  8.70e-07  2.88e-06  3.33e-06   erg/cm2
      90%_error_low -8.30e-08 -1.08e-07 -1.35e-07 -5.55e-07 -3.29e-07 -6.69e-07   erg/cm2
      90%_error_hi   8.30e-08  9.18e-08  1.29e-07  1.27e-06  3.40e-07  1.36e-06   erg/cm2
Peak flux      CPL   2.29e-01  2.00e-01  9.66e-02  3.42e-02  5.49e-01  5.60e-01   ph/cm2/s
      90%_error_low -7.09e-02 -8.85e-02 -4.50e-02 -3.42e-02 -1.18e-01 -1.26e-01   ph/cm2/s
      90%_error_hi   7.05e-02  5.49e-02  3.96e-02  5.66e-02  1.19e-01  7.78e-02   ph/cm2/s
 
======================================================================

Special notes of this burst

Image

Pre-slew 15.0-50.0 keV image (Event data)

#RAcent DECcent POSerr Theta  Phi  Peak_Cts  SNR Name
37.014 11.697 0.000 29.057 79.341 0.698 8.425 TRIG_00258408
 
Image time interval: 0.000 to 64.000 [sec]

Light Curves

Note: The mask-weighted lightcurves have units of either count/det or counts/sec/det, where a det is 0.4 x 0.4 = 0.16 sq cm.

Full-time range; 1 s binning

Bokeh Plot

Other quick-look light curves:

64 ms binning (zoomed)
16 ms binning (zoomed)
8 ms binning (zoomed)
2 ms binning (zoomed)
SN=5 or 10 s binning (full-time range)
Raw light curve

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 -130.612 sec. to  373.888 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.98959     ( -0.151615   0.145678 )
Norm@50keV  : 6.45477E-04    ( -6.13197e-05   6.02093e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.57 using 59 PHA bins.
# Reduced chi-squared =          1.150 for     57 degrees of freedom 
# Null hypothesis probability =   2.039209e-01
 
Photon flux (15-150 keV)    in 504.5 sec: 9.63680E-02 ( -0.0071139  0.007117 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.002e-06 ( -2.66789e-07  2.71866e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from -130.612 sec. to  373.888 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.63464     ( -0.523302   0.706076 )
Epeak [keV] : 43.5024      ( -26.455 -43.5022 )
Norm@50keV  : 1.02710E-03    ( -0.000531627   0.00155419 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.61 using 59 PHA bins.
# Reduced chi-squared =          1.154 for     56 degrees of freedom 
# Null hypothesis probability =   2.010613e-01
 
Photon flux (15-150 keV)    in 504.5 sec: 9.45813E-02 ( -0.0077499  0.0077307 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.88019e-06 ( -3.28717e-07  3.39626e-07 ) ergs/cm2

1-s peak spectrum fit

Power-law model

Time interval is from  310.568 sec. to  311.568 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.91253     ( -0.410395   0.366824 )
Norm@50keV  : 3.85674E-03    ( -0.00108466   0.00104108 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.64 using 59 PHA bins.
# Reduced chi-squared =          1.134 for     57 degrees of freedom 
# Null hypothesis probability =   2.272289e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.556485 ( -0.116811  0.116846 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.54683e-08 ( -9.35992e-09  9.85067e-09 ) ergs/cm2

Cutoff power-law model

Time interval is from  310.568 sec. to  311.568 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.38667     ( -0.777682   1.845 )
Epeak [keV] : 46.0731      (   )
Norm@50keV  : 8.03422E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.24 using 59 PHA bins.
# Reduced chi-squared =          1.147 for     56 degrees of freedom 
# Null hypothesis probability =   2.102817e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.548625 ( -0.117735  0.11857 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.3246e-08 ( -1.00774e-08  1.06495e-08 ) ergs/cm2

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = 459.748 sec.
Hardness ratio (energy fluence ratio) = 1.00727947859

S(15-50 keV) vs. S(50-150 keV) plot

S(15-50 keV)  = 1.5607172e-06
S(50-150 keV) = 1.4412869e-06

The dash-dotted line and the dashed line traces the fluences calculated from the Band function with Epeak = 15 and 150 keV, respectively. Both lines assume a canonical values of alpha = -1 and beta = -2.5.

Mask shadow pattern

IMX = 0.102762484959, IMY = -0.546020944351

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 -130.612000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
326.1498  38.2903   22.2  54.8  -29.3  -0.2567  -0.5    2.1	Cyg X-2                       
 18.2820  48.0035    2.4  47.7   19.9   1.3382   4.9 ------	UNKNOWN                       
330.7031 -12.6310    2.5  41.1  -98.2   2.3259   4.7 ------	UNKNOWN

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

Time interval of the image:
-130.612000 72.100600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
326.0678  38.2103   12.6  54.8  -29.4   0.9201   0.9    8.3	Cyg X-2                       
 36.9945  11.7127    1.8  29.0   79.3   2.1965   6.3 ------	UNKNOWN                       
 16.1276  37.4404    2.3  37.0   20.6   1.6964   5.1 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
123.100600 963.101700
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
  8.9006  64.9987    3.1  56.7    4.7   7.7498   3.7 ------	UNKNOWN                       
 37.0202  11.6965    1.1   0.0  105.7   4.0367  10.5 ------	UNKNOWN                       
357.1600  58.3675    3.1  55.5   -5.6   4.9080   3.8 ------	UNKNOWN                       
  3.7494  20.2438    3.2  33.0  -52.2   2.3796   3.7 ------	UNKNOWN

Analysis Summary

Notes:

Image

Pre-slew 15.0-50.0 keV image (Event data)

Light Curves

Full-time range; 1 s binning

Other quick-look light curves:

64 ms binning (zoomed) 16 ms binning (zoomed) 8 ms binning (zoomed) 2 ms binning (zoomed) SN=5 or 10 s binning (full-time range) Raw light curve

Spectra

Notes:

Time averaged spectrum fit using the average DRM

Power-law model

Cutoff power-law model

1-s peak spectrum fit

Power-law model

Cutoff power-law model

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

S(15-50 keV) vs. S(50-150 keV) plot

Mask shadow pattern

Spacecraft aspect plot

Bright source in the pre-burst/pre-slew/post-slew images

Pre-burst image of 15-350 keV band

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

Post-slew image of 15-350 keV band

64 ms binning (zoomed)
16 ms binning (zoomed)
8 ms binning (zoomed)
2 ms binning (zoomed)
SN=5 or 10 s binning (full-time range)
Raw light curve