GRB140629A: 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: Sat Oct  4 21:54:20 EDT 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger602884
======================================================================

  Trigger: 00602884      Segment: 000

  BAT Trigger Time: 425744262.528   [s; MET]
      Trigger Stop: 425744263.552   [s; MET]
               UTC: 2014-06-29T14:17:30.326760    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 248.981975533517   Dec: 41.890321954013  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.95
     Image Trigger?:     NO
     Rate S/N Ratio:     10.9087121146357  [ if not an image trigger ]
     Image S/N Ratio:    7.95

  Analysis Position:   [ source = BAT ]
    RA: 248.981975533517   Dec: 41.890321954013  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 249.011047035745   Dec: 41.8965474582744  [deg; J2000]  
        { 16h 36m 02.7s , +41d 53' 47.6" }
         +/- 1.64869398298634 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.920466246897388 [arcmin] (formal 1-sigma fit error)
    SNR: 14.8908093853219
 
  Angular difference between the analysis and refined position is 1.351089 arcmin
 
  Partial Coding Fraction: 0.4179688    [ including projection effects ]

  Duration
     T90: 38.272000014782 +/- 11.6226537648559
        Measured from: -3.6240000128746
                   to: 34.6480000019073     [s; relative to TRIGTIME]
     T50: 11.6480000019073 +/- 2.48531047010479
        Measured from: 4.05599999427795
                   to: 15.7039999961853     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 12.1000000238419     
                   to: 13.1000000238419     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -6.18400001525879     
                   to: 48.6639999747276     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.124093   1.507504   0.964569   0.142335
           0.073230   0.073160   0.064828   0.058284 [error]
 Peak      0.116601   0.170135   0.180420   0.050601
           0.012963   0.014235   0.013497   0.010290 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100   54.848   -6.184   48.664
T90    38.272   -3.624   34.648
T50    11.648    4.056   15.704
Peak    1.000   12.100   13.100
 
 
====== 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      -1.851    -0.109      0.106       -           -               -         4.54e-03     -2.93e-04          2.91e-04      42.640   57
CPL     -1.334    -0.419      0.463       60.924     -11.996        55.603      8.48e-03     -3.30e-03          6.21e-03      38.090   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      -1.355     -0.137     0.137       -           -               -         3.59e-02     -2.95e-03          2.95e-03      63.020   57
CPL     -0.801     -0.545     0.627      120.901     -37.612      1616.769      6.46e-02     -2.79e-02          5.82e-02      60.010   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   4.43e-07  6.57e-07  7.29e-07  1.52e-06  2.29e-06  3.35e-06   erg/cm2
      90%_error_low -4.16e-08 -3.91e-08 -6.31e-08 -2.58e-07 -1.48e-07 -3.19e-07   erg/cm2
      90%_error_hi   4.27e-08  3.90e-08  6.33e-08  2.91e-07  1.49e-07  3.42e-07   erg/cm2
Peak flux       PL   1.28e+00  1.41e+00  1.10e+00  1.42e+00  4.32e+00  5.21e+00   ph/cm2/s
      90%_error_low -1.91e-01 -1.34e-01 -1.05e-01 -2.59e-01 -3.73e-01 -4.33e-01   ph/cm2/s
      90%_error_hi   2.01e-01  1.33e-01  1.04e-01  2.91e-01  3.74e-01  4.35e-01   ph/cm2/s
 
Fluence        CPL   4.09e-07  6.92e-07  7.39e-07  7.22e-07  2.20e-06  2.56e-06   erg/cm2
      90%_error_low -4.92e-08 -4.81e-08 -6.84e-08 -3.07e-07 -1.65e-07 -3.53e-07   erg/cm2
      90%_error_hi   4.99e-08  4.91e-08  6.86e-08  5.83e-07  1.66e-07  5.96e-07   erg/cm2
Peak flux      CPL   1.13e+00  1.46e+00  1.18e+00  8.69e-01  4.23e+00  4.64e+00   ph/cm2/s
      90%_error_low -2.39e-01 -1.49e-01 -1.30e-01 -3.28e-01 -3.85e-01 -5.28e-01   ph/cm2/s
      90%_error_hi   2.50e-01  1.51e-01  1.33e-01  5.62e-01  3.85e-01  6.60e-01   ph/cm2/s
 
======================================================================

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  249.0110    41.8965   0.0129    44.0498     1.3103         1.3477601     14.891 TRIG_00602884                 
 
Foreground time interval of the image:
 -6.184  11.573 (delta_t =  17.757 [sec])
Background time interval of the image:
-239.528  -6.184 (delta_t = 233.344 [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   -6.184 sec. to   48.664 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.85109     ( -0.108493   0.106442 )
Norm@50keV  : 4.54100E-03    ( -0.00029294   0.000290561 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          42.64 using 59 PHA bins.
# Reduced chi-squared =         0.7482 for     57 degrees of freedom 
# Null hypothesis probability =   9.212672e-01
 
Photon flux (15-150 keV)    in 54.85 sec: 0.638606 ( -0.038969  0.039051 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.29054e-06 ( -1.47909e-07  1.48828e-07 ) ergs/cm2
 

Cutoff power-law model

Time interval is from   -6.184 sec. to   48.664 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.33408     ( -0.418865   0.463377 )
Epeak [keV] : 60.9244      ( -11.9961 55.6022 )
Norm@50keV  : 8.47879E-03    ( -0.00329615   0.00620593 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          38.09 using 59 PHA bins.
# Reduced chi-squared =         0.6801 for     56 degrees of freedom 
# Null hypothesis probability =   9.679865e-01
 
Photon flux (15-150 keV)    in 54.85 sec: 0.621245 ( -0.041278  0.041334 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.19845e-06 ( -1.64702e-07  1.65656e-07 ) ergs/cm2
 

1-s peak spectrum fit

Power-law model

Time interval is from   12.100 sec. to   13.100 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.35453     ( -0.136876   0.136939 )
Norm@50keV  : 3.58574E-02    ( -0.00294819   0.00294802 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          63.02 using 59 PHA bins.
# Reduced chi-squared =          1.106 for     57 degrees of freedom 
# Null hypothesis probability =   2.720353e-01
 
Photon flux (15-150 keV)    in 1 sec: 4.32389 ( -0.37325  0.37416 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.49897e-07 ( -3.07653e-08  3.08969e-08 ) ergs/cm2
 

Cutoff power-law model

Time interval is from   12.100 sec. to   13.100 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.800751     ( -0.545398   0.627024 )
Epeak [keV] : 120.901      ( -37.6113 1616.76 )
Norm@50keV  : 6.46244E-02    ( -0.0278903   0.0582434 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.01 using 59 PHA bins.
# Reduced chi-squared =          1.072 for     56 degrees of freedom 
# Null hypothesis probability =   3.326860e-01
 
Photon flux (15-150 keV)    in 1 sec: 4.23104 ( -0.38463  0.38539 ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = 38.272 sec.
Hardness ratio (energy fluence ratio) = 1.10876632741

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

S(15-50 keV)  = 1.0997034e-06
S(50-150 keV) = 1.1908359e-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 = 9.671182509658034E-01, IMY = -2.212094006979784E-02

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:
-239.528000 -6.184000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
244.9809 -15.6501    0.4  24.4  115.9   7.5321  26.5    0.6	Sco X-1                       
254.4494  35.3378    7.6  41.3   12.1   0.5618   1.5    0.5	Her X-1                       
268.4761  -1.5624    6.4  40.6   73.6   1.7230   1.8    9.2	SW J1753.5-0127               
218.9160  -4.9594    2.3  11.5 -149.0   1.0739   5.1 ------	UNKNOWN                       
236.7681  56.1730    2.6  54.6  -15.3   2.6694   4.5 ------	UNKNOWN                       

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

Time interval of the image:
-6.184000 11.572600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
245.0615 -15.5188    9.9  24.4  115.6   0.0853   1.2    8.7	Sco X-1                       
254.5387  35.2180   15.8  41.3   12.3  -0.0658  -0.7    8.5	Her X-1                       
268.3561  -1.3372  401.5  40.5   73.3  -0.0067  -0.0    7.0	SW J1753.5-0127               
249.0111  41.8965    0.8  44.0    1.3   1.3472  14.9 ------	UNKNOWN                       

Post-slew image of 15-350 keV band

Time interval of the image:
80.172600 962.479200
1036.472000 1036.572590
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.3749  35.3939    2.9   7.7   84.2   2.0815   4.0    5.1	Her X-1                       
299.5822  35.2012    0.6  39.5   21.4  16.8646  19.5    0.4	Cyg X-1                       
308.0791  40.9311    1.9  43.4    9.4   5.3730   6.1    1.9	Cyg X-3                       
224.7334  -1.6809    3.0  48.8  151.9   8.3006   3.9 ------	UNKNOWN                       
215.8410   7.2097    3.2  45.4  168.5   4.2882   3.6 ------	UNKNOWN                       
266.2665  38.3511    3.4  13.6   38.1   1.6636   3.4 ------	UNKNOWN                       
233.4060  27.7129    2.9  19.0  165.7   2.2238   4.1 ------	UNKNOWN                       
324.2932  42.5265    2.6  53.8    0.9   7.3251   4.4 ------	UNKNOWN                       
236.5050  56.1888    2.6  16.4  -86.4   2.4717   4.4 ------	UNKNOWN                       
331.0364  63.8267    2.6  49.9  -26.3   5.3121   4.5 ------	UNKNOWN                       
263.7157  86.6125    2.5  44.9  -60.0  13.2985   4.7 ------	UNKNOWN