GRB140614B: 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 22:14:23 EDT 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger601662
======================================================================

  Trigger: 00601662      Segment: 000

  BAT Trigger Time: 424420703.936   [s; MET]
      Trigger Stop: 424420720.32   [s; MET]
               UTC: 2014-06-14T06:38:11.799000    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 322.625366627712   Dec: 14.9204847784049  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9.7
     Image Trigger?:     NO
     Rate S/N Ratio:     13.2664991614216  [ if not an image trigger ]
     Image S/N Ratio:    9.7

  Analysis Position:   [ source = BAT ]
    RA: 322.625366627712   Dec: 14.9204847784049  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 322.635989321396   Dec: 14.8961097076857  [deg; J2000]  
        { 21h 30m 32.6s , +14d 53' 46.0" }
         +/- 2.02565998374233 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.834388085219816 [arcmin] (formal 1-sigma fit error)
    SNR: 11.0959928282915
 
  Angular difference between the analysis and refined position is 1.586903 arcmin
 
  Partial Coding Fraction: 0.7109375    [ including projection effects ]

  Duration
     T90: 49.8719999194145 +/- 7.994274206225
        Measured from: -1.16799998283386
                   to: 48.7039999365807     [s; relative to TRIGTIME]
     T50: 24.2519999742508 +/- 8.85475168263233
        Measured from: 6.12000000476837
                   to: 30.3719999790192     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 6.92800003290176     
                   to: 7.92800003290176     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -3.283999979496     
                   to: 55.6759999990463     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.437566   0.472962   0.192335   0.051573
           0.051140   0.052825   0.045236   0.038633 [error]
 Peak      0.024563   0.019651   0.013317   0.007901
           0.006803   0.007248   0.006171   0.005114 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100   58.960   -3.284   55.676
T90    49.872   -1.168   48.704
T50    24.252    6.120   30.372
Peak    1.000    6.928    7.928
 
 
====== 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      -2.055    -0.263      0.242       -           -               -         1.07e-03     -1.92e-04          1.86e-04      54.930   57
CPL     -0.946    -0.818      1.490       38.758      N/A           N/A         4.76e-03        N/A               N/A         52.140   56
 
 
=== 1-s peak spectral analysis ===
(Best model with acceptable fit: N/A)
 
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      -1.802     -0.721     0.652       -           -               -         3.67e-03     -1.58e-03          1.43e-03      54.240   57
CPL     -2.325     -1.182     1.701      118.350      N/A           N/A         1.89e-03        N/A               N/A         53.670   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   1.36e-07  1.79e-07  1.72e-07  2.95e-07  5.84e-07  7.81e-07   erg/cm2
      90%_error_low -2.36e-08 -2.41e-08 -4.09e-08 -1.17e-07 -9.43e-08 -1.71e-07   erg/cm2
      90%_error_hi   2.42e-08  2.39e-08  4.23e-08  1.60e-07  9.73e-08  2.04e-07   erg/cm2
Peak flux       PL   2.02e-01  1.70e-01  9.76e-02  8.32e-02  5.06e-01  5.53e-01   ph/cm2/s
      90%_error_low -9.56e-02 -5.44e-02 -9.76e-02 -8.32e-02 -1.62e-01 -1.83e-01   ph/cm2/s
      90%_error_hi   9.89e-02  5.43e-02  5.41e-02  1.31e-01  1.62e-01  1.89e-01   ph/cm2/s
 
Fluence        CPL   1.24e-07  2.03e-07  1.60e-07  5.74e-08  5.30e-07  5.45e-07   erg/cm2
      90%_error_low -2.80e-08 -3.43e-08 -5.12e-08    N/A    -9.45e-08 -1.08e-07   erg/cm2
      90%_error_hi   2.75e-08  3.57e-08  4.92e-08    N/A     1.08e-07  2.59e-07   erg/cm2
Peak flux      CPL   1.82e-01  1.14e-01  4.80e-02  3.30e-02  3.58e-01  3.78e-01   ph/cm2/s
      90%_error_low -1.11e-01 -6.97e-02 -4.80e-02 -3.30e-02     N/A   -2.30e-01   ph/cm2/s
      90%_error_hi   1.11e-01  1.04e-01  9.42e-02  4.09e-02     N/A    3.14e-01   ph/cm2/s
 
======================================================================

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  322.6360    14.8961   0.0173    20.1491   111.8494         1.1290962     11.096 TRIG_00601662                 
 
Foreground time interval of the image:
 -3.284  55.676 (delta_t =  58.960 [sec])
Background time interval of the image:
-239.936  -3.284 (delta_t = 236.652 [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   -3.284 sec. to   55.676 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.0548     ( -0.26344   0.242162 )
Norm@50keV  : 1.07003E-03    ( -0.000191719   0.000186348 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.93 using 59 PHA bins.
# Reduced chi-squared =         0.9636 for     57 degrees of freedom 
# Null hypothesis probability =   5.532161e-01
 
Photon flux (15-150 keV)    in 58.96 sec: 0.164698 ( -0.021475  0.021476 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.83979e-07 ( -9.42599e-08  9.72722e-08 ) ergs/cm2
 

Cutoff power-law model

Time interval is from   -3.284 sec. to   55.676 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.94605     ( -0.817924   1.49022 )
Epeak [keV] : 38.7575      (   )
Norm@50keV  : 4.75907E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.14 using 59 PHA bins.
# Reduced chi-squared =         0.9310 for     56 degrees of freedom 
# Null hypothesis probability =   6.218533e-01
 
Photon flux (15-150 keV)    in 58.96 sec: 0.158842 ( -0.022127  0.022204 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.30063e-07 ( -9.45034e-08  1.07712e-07 ) ergs/cm2
 

1-s peak spectrum fit

Power-law model

Time interval is from    6.928 sec. to    7.928 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.80184     ( -0.721411   0.651967 )
Norm@50keV  : 3.67202E-03    ( -0.00158419   0.00143481 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.24 using 59 PHA bins.
# Reduced chi-squared =         0.9515 for     57 degrees of freedom 
# Null hypothesis probability =   5.793410e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.506384 ( -0.161657  0.161657 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.38073e-08 ( -1.35846e-08  1.46869e-08 ) ergs/cm2
 

Cutoff power-law model

Time interval is from    6.928 sec. to    7.928 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.38414     ( -1.12159   1.76058 )
Epeak [keV] : 136.913      (   )
Norm@50keV  : 1.77720E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.65 using 59 PHA bins.
# Reduced chi-squared =         0.9580 for     56 degrees of freedom 
# Null hypothesis probability =   5.644477e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.358208 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.3614e-08 ( -1.35097e-08  1.4313e-08 ) ergs/cm2
 

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = 49.872 sec.
Hardness ratio (energy fluence ratio) = 0.962786068203

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

S(15-50 keV)  = 3.14529e-07
S(50-150 keV) = 2.6944999e-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 = -1.365559274131149E-01, IMY = -3.405622276047429E-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:
-239.936000 -3.284000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
299.6037  35.2009    1.3  43.5  147.1   5.2074   8.6    0.7	Cyg X-1                       
308.0906  40.9639    3.2  39.3  158.9   1.4372   3.6    1.1	Cyg X-3                       
326.1802  38.1588   13.3  26.8  171.2   0.1924   0.9    9.8	Cyg X-2                       
348.1354 -28.7665    3.0  45.1   16.8   1.5232   3.9 ------	UNKNOWN                       
333.0485  -0.0235    2.2  19.2   56.1   1.2143   5.2 ------	UNKNOWN                       
357.2748 -26.3206    2.3  44.5    4.8   1.7691   5.0 ------	UNKNOWN                       

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

Time interval of the image:
-3.284000 55.676000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
299.6385  35.2033    4.9  43.4  147.1   0.5786   2.4    2.4	Cyg X-1                       
308.1002  40.7514    7.9  39.2  158.6  -0.2212  -1.5   12.1	Cyg X-3                       
326.0575  38.4424   11.9  27.1  171.4   0.0966   1.0    9.0	Cyg X-2                       
322.6360  14.8961    1.0  20.1  111.8   1.1290  11.1 ------	UNKNOWN                       
296.2171  62.7380    2.5  56.9  178.8   2.4376   4.6 ------	UNKNOWN                       
358.5949 -13.8842    2.2  33.5   -4.7   0.5700   5.2 ------	UNKNOWN                       
 20.4564 -26.1890    2.6  55.5  -18.3   1.2941   4.3 ------	UNKNOWN                       
 21.1069  -5.8838    1.9  43.2  -39.9   1.0273   6.1 ------	UNKNOWN                       

Post-slew image of 15-350 keV band

Time interval of the image:
114.564580 962.097400
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
288.8101  10.9509    0.6  33.2  119.5  20.7546  18.4    0.8	GRS 1915+105                  
299.5887  35.2025    0.3  29.0  170.9  25.4872  39.0    0.1	Cyg X-1                       
308.1329  40.9619    1.3  28.9 -170.8   5.4914   9.2    1.2	Cyg X-3                       
326.1003  38.1466    9.6  23.4 -140.9   0.7087   1.2   11.0	Cyg X-2                       
293.1212 -11.6990    3.7  39.6   81.6   8.0152   3.1 ------	UNKNOWN