GRB070103: Summary Image Light curves Spectra Distribution Others

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 12:10:49 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger254532
======================================================================

  Trigger: 00254532      Segment: 000

  BAT Trigger Time: 189550001.088   [s; MET]
      Trigger Stop: 189550001.6   [s; MET]
               UTC: 2007-01-03T20:46:39.412140    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 352.557389445908   Dec: 26.8755363387016  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9.86
     Image Trigger?:     NO
     Rate S/N Ratio:     17.2336879396141  [ if not an image trigger ]
     Image S/N Ratio:    9.86

  Analysis Position:   [ source = BAT ]
    RA: 352.557389445908   Dec: 26.8755363387016  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 352.56854193373   Dec: 26.821974636184  [deg; J2000]  
        { 23h 30m 16.5s , +26d 49' 19.1" }
         +/- 2.31156421764552 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.29814343159752 [arcmin] (formal 1-sigma fit error)
    SNR: 9.18867134950623
 
  Angular difference between the analysis and refined position is 3.268686 arcmin
 
  Partial Coding Fraction: 0.84375    [ including projection effects ]

  Duration
     T90: 18.4079999923706 +/- 1.21269449867353
        Measured from: 0.180000007152557
                   to: 18.5879999995232     [s; relative to TRIGTIME]
     T50: 12.272000014782 +/- 5.84761043906061
        Measured from: 2.24799999594688
                   to: 14.5200000107288     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.113999992609024     
                   to: 0.886000007390976     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.104000002145767     
                   to: 19.419999986887     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.225876   0.248903   0.116137   0.012421
           0.022672   0.023408   0.020512   0.018177 [error]
 Peak      0.044314   0.051026   0.022973  -0.000730
           0.005576   0.005915   0.005128   0.004350 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100   19.524   -0.104   19.420
T90    18.408    0.180   18.588
T50    12.272    2.248   14.520
Peak    1.000   -0.114    0.886
 
 
====== 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      -1.894    -0.208      0.198       -           -               -         1.83e-03     -2.55e-04          2.50e-04      48.650   57
CPL     -1.223    -0.824      1.067       46.633     -41.693       -46.633      4.59e-03     -2.90e-03          1.56e-02      46.830   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      -1.871     -0.241     0.226       -           -               -         7.40e-03     -1.22e-03          1.19e-03      70.600   57
CPL     -0.135     -1.274     1.647       43.645      -7.760        16.520      7.65e-02     -7.65e-02          6.26e-01      64.770   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   6.63e-08  9.59e-08  1.03e-07  2.07e-07  3.29e-07  4.72e-07   erg/cm2
      90%_error_low -1.01e-08 -1.06e-08 -1.92e-08 -6.73e-08 -4.44e-08 -9.06e-08   erg/cm2
      90%_error_hi   1.03e-08  1.06e-08  1.97e-08  8.65e-08  4.56e-08  1.06e-07   erg/cm2
Peak flux       PL   4.35e-01  3.52e-01  1.92e-01  1.54e-01  1.05e+00  1.13e+00   ph/cm2/s
      90%_error_low -7.87e-02 -4.66e-02 -4.06e-02 -5.41e-02 -1.38e-01 -1.54e-01   ph/cm2/s
      90%_error_hi   8.14e-02  4.65e-02  4.14e-02  6.93e-02  1.38e-01  1.55e-01   ph/cm2/s
 
Fluence        CPL   6.34e-08  1.04e-07  9.81e-08  6.29e-08  3.03e-07  3.28e-07   erg/cm2
      90%_error_low -1.11e-08 -1.47e-08 -2.52e-08 -4.85e-08 -5.12e-08 -7.28e-08   erg/cm2
      90%_error_hi   1.10e-08  1.54e-08  2.25e-08  1.68e-07  5.52e-08  1.73e-07   erg/cm2
Peak flux      CPL   3.73e-01  4.25e-01  1.80e-01  2.21e-02  9.97e-01  9.99e-01   ph/cm2/s
      90%_error_low -9.52e-02 -6.95e-02 -5.40e-02 -2.21e-02 -1.41e-01 -1.42e-01   ph/cm2/s
      90%_error_hi   9.51e-02  7.17e-02  5.18e-02  6.35e-02  1.42e-01  1.48e-01   ph/cm2/s
 
======================================================================

Image

Pre-slew 15.0-350.0 keV image (Event data)

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  352.5685    26.8220   0.0209    20.1924  -131.1310         0.2913869      9.189 TRIG_00254532                 
 
Foreground time interval of the image:
 -0.104  10.013 (delta_t =  10.117 [sec])
Background time interval of the image:
-239.088  -0.104 (delta_t = 238.984 [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

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   -0.104 sec. to   19.420 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.89362     ( -0.208411   0.19817 )
Norm@50keV  : 1.83460E-03    ( -0.000255293   0.000249775 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.65 using 59 PHA bins.
# Reduced chi-squared =         0.8536 for     57 degrees of freedom 
# Null hypothesis probability =   7.764166e-01
 
Photon flux (15-150 keV)    in 19.52 sec: 0.262590 ( -0.02876  0.028761 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.29275e-07 ( -4.4449e-08  4.56028e-08 ) ergs/cm2
 

Cutoff power-law model

Time interval is from   -0.104 sec. to   19.420 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.22267     ( -0.824272   1.06656 )
Epeak [keV] : 46.6333      ( -41.6925 -46.6327 )
Norm@50keV  : 4.58632E-03    ( -0.00289629   0.0156073 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          46.83 using 59 PHA bins.
# Reduced chi-squared =         0.8362 for     56 degrees of freedom 
# Null hypothesis probability =   8.037877e-01
 
Photon flux (15-150 keV)    in 19.52 sec: 0.256197 ( -0.029734  0.029803 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.0339e-07 ( -5.11752e-08  5.5243e-08 ) ergs/cm2
 

1-s peak spectrum fit

Power-law model

Time interval is from   -0.114 sec. to    0.886 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.87121     ( -0.241359   0.22571 )
Norm@50keV  : 7.39791E-03    ( -0.00122135   0.00119339 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          70.60 using 59 PHA bins.
# Reduced chi-squared =          1.239 for     57 degrees of freedom 
# Null hypothesis probability =   1.063343e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.04900 ( -0.138462  0.13846 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.80221e-08 ( -1.0961e-08  1.12682e-08 ) ergs/cm2
 

Cutoff power-law model

Time interval is from   -0.114 sec. to    0.886 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.135346     ( -1.27424   1.64604 )
Epeak [keV] : 43.6449      ( -7.75805 16.5217 )
Norm@50keV  : 7.65090E-02    ( -0.0766121   0.626274 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.77 using 59 PHA bins.
# Reduced chi-squared =          1.157 for     56 degrees of freedom 
# Null hypothesis probability =   1.973462e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.996988 ( -0.140573  0.142002 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.8401e-08 ( -1.0316e-08  1.22356e-08 ) ergs/cm2
 

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = 18.408 sec.
Hardness ratio (energy fluence ratio) = 1.07656422125

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

S(15-50 keV)  = 1.6210686e-07
S(50-150 keV) = 1.6717427e-07

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 = -2.419172814421541E-01, IMY = 2.770127678884092E-01

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:
-239.088000 -0.104000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
299.5828  35.1855    0.6  44.7  -48.6   9.8475  19.0    1.0	Cyg X-1                       
308.1309  41.0245   12.9  35.9  -46.0   0.2495   0.9    4.4	Cyg X-3                       
326.1929  38.1861    4.8  24.9  -63.8   0.5606   2.4    8.2	Cyg X-2                       
 42.8401  50.4502    3.0  29.4   99.9   1.0168   3.9 ------	UNKNOWN                       
359.4037  70.2435    2.7  23.7   35.2   0.7956   4.3 ------	UNKNOWN                       
 15.4779   8.8733    2.5  40.4 -172.7   1.1605   4.6 ------	UNKNOWN                       
  7.2973  -0.5303    2.6  47.7 -158.1   1.6653   4.5  439.0	UNKNOWN                       
  8.6740  -5.4397    2.1  52.8 -158.9   2.8615   5.5 ------	UNKNOWN                       
308.0941  37.6669    1.8  37.5  -50.9   2.0160   6.3 ------	UNKNOWN                       
357.8252  -8.6962    2.8  55.2 -145.4   4.3965   4.2  537.7	UNKNOWN                       

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

Time interval of the image:
-0.104000 10.012590
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
299.7290  35.0551    9.6  44.6  -48.9  -0.1071  -1.2   11.1	Cyg X-1                       
308.0131  41.0517    6.2  36.0  -45.8   0.0876   1.9    7.4	Cyg X-3                       
326.3375  38.4093    5.1  24.7  -63.4  -0.0864  -2.3    9.4	Cyg X-2                       
352.5685  26.8220    1.3  20.2 -131.1   0.2914   9.2 ------	UNKNOWN                       
 11.6332   1.1824    2.2  46.8 -164.4   0.2881   5.1 ------	UNKNOWN                       

Post-slew image of 15-350 keV band

Time interval of the image:
52.412600 435.196900
435.912000 963.029600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
299.5804  35.2042    0.4  45.6  -35.6  33.2921  31.3    0.5	Cyg X-1                       
308.0968  40.8624   15.1  39.0  -27.1  -0.5102  -0.8    5.4	Cyg X-3                       
326.0795  38.3210    2.2  24.9  -25.8   2.2329   5.3    4.3	Cyg X-2                       
 24.9585  32.8486    3.5  28.6  100.4   2.2291   3.3 ------	UNKNOWN                       
 18.4903 -25.7780    4.0  58.3 -177.3  10.0224   2.9 ------	UNKNOWN                       
308.0221  37.6736    1.6  38.8  -32.2   5.2767   7.2 ------	UNKNOWN