GRB141130A: 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: Sun Dec 14 17:27:30 EST 2014
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger620090
======================================================================

  Trigger: 00620090      Segment: 000

  BAT Trigger Time: 439081868.928   [s; MET]
      Trigger Stop: 439081873.024   [s; MET]
               UTC: 2014-11-30T23:10:56.070920    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 222.814459238838   Dec: 47.2999559433812  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9.77
     Image Trigger?:     NO
     Rate S/N Ratio:     10.0498756211209  [ if not an image trigger ]
     Image S/N Ratio:    9.77

  Analysis Position:   [ source = BAT ]
    RA: 222.814459238838   Dec: 47.2999559433812  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 222.799359288083   Dec: 47.3223068429346  [deg; J2000]  
        { 14h 51m 11.8s , +47d 19' 20.3" }
         +/- 1.36365609949332 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.537108931395711 [arcmin] (formal 1-sigma fit error)
    SNR: 19.5291286591665
 
  Angular difference between the analysis and refined position is 1.475048 arcmin
 
  Partial Coding Fraction: 0.734375    [ including projection effects ]

  Duration
     T90: 62.8559999465942 +/- 11.3720388524948
        Measured from: -38.9359999895096
                   to: 23.9199999570847     [s; relative to TRIGTIME]
     T50: 26.5519999265671 +/- 2.8045049509388
        Measured from: -24.3079999685287
                   to: 2.24399995803833     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -4.68799996376038     
                   to: -3.68799996376038     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -42.7479999661446     
                   to: 40.0160000324249     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.300561   1.774785   1.209570   0.193915
           0.065368   0.068272   0.059076   0.049623 [error]
 Peak      0.029550   0.067962   0.049943   0.010128
           0.007543   0.008134   0.006842   0.005751 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100   82.764  -42.748   40.016
T90    62.856  -38.936   23.920
T50    26.552  -24.308    2.244
Peak    1.000   -4.688   -3.688
 
 
====== 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      -1.562    -0.083      0.083       -           -               -         3.57e-03     -1.66e-04          1.66e-04      60.740   57
CPL     -1.295    -0.300      0.350      129.045     -47.664      -129.045      4.89e-03     -1.40e-03          2.44e-03      58.780   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      -1.398     -0.235     0.234       -           -               -         9.94e-03     -1.49e-03          1.48e-03      60.300   57
CPL      0.186     -1.098     1.422       68.534     -14.027        45.120      6.26e-02     -6.26e-02          2.44e-01      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   3.99e-07  7.07e-07  9.58e-07  2.67e-06  2.77e-06  4.74e-06   erg/cm2
      90%_error_low -3.15e-08 -3.38e-08 -5.89e-08 -3.40e-07 -1.40e-07 -3.87e-07   erg/cm2
      90%_error_hi   3.23e-08  3.37e-08  5.88e-08  3.73e-07  1.41e-07  4.14e-07   erg/cm2
Peak flux       PL   3.71e-01  3.97e-01  3.01e-01  3.72e-01  1.21e+00  1.44e+00   ph/cm2/s
      90%_error_low -8.73e-02 -6.27e-02 -5.44e-02 -1.18e-01 -1.80e-01 -2.18e-01   ph/cm2/s
      90%_error_hi   9.30e-02  6.22e-02  5.41e-02  1.47e-01  1.80e-01  2.21e-01   ph/cm2/s
 
Fluence        CPL   3.82e-07  7.26e-07  9.68e-07  1.75e-06  2.71e-06  3.82e-06   erg/cm2
      90%_error_low -3.74e-08 -4.08e-08 -6.17e-08 -6.72e-07 -1.63e-07 -6.88e-07   erg/cm2
      90%_error_hi   3.79e-08  4.15e-08  6.24e-08  1.03e-06  1.63e-07  1.06e-06   erg/cm2
Peak flux      CPL   2.79e-01  4.55e-01  3.36e-01  9.64e-02  1.15e+00  1.17e+00   ph/cm2/s
      90%_error_low -1.03e-01 -7.87e-02 -6.62e-02 -6.05e-02 -1.85e-01 -1.96e-01   ph/cm2/s
      90%_error_hi   1.10e-01  8.19e-02  6.72e-02  1.36e-01  1.86e-01  2.14e-01   ph/cm2/s
 
======================================================================

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  222.7994    47.3223   0.0098    17.6623   102.7802         4.4537122     19.529 TRIG_00620090                 
 
Foreground time interval of the image:
-42.748  34.573 (delta_t =  77.321 [sec])
Background time interval of the image:
-68.427 -42.748 (delta_t =  25.679 [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  -42.748 sec. to   40.016 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.56169     ( -0.0829011   0.0825818 )
Norm@50keV  : 3.56604E-03    ( -0.00016649   0.000166043 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.74 using 59 PHA bins.
# Reduced chi-squared =          1.066 for     57 degrees of freedom 
# Null hypothesis probability =   3.428718e-01
 
Photon flux (15-150 keV)    in 82.76 sec: 0.452996 ( -0.021228  0.021258 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.77416e-06 ( -1.40128e-07  1.40924e-07 ) ergs/cm2
 

Cutoff power-law model

Time interval is from  -42.748 sec. to   40.016 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.2949     ( -0.299545   0.350133 )
Epeak [keV] : 129.045      ( -47.6825 -129.063 )
Norm@50keV  : 4.88612E-03    ( -0.00139982   0.00243821 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.78 using 59 PHA bins.
# Reduced chi-squared =          1.050 for     56 degrees of freedom 
# Null hypothesis probability =   3.740161e-01
 
Photon flux (15-150 keV)    in 82.76 sec: 0.446408 ( -0.022668  0.022655 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.70614e-06 ( -1.63472e-07  1.62657e-07 ) ergs/cm2
 

1-s peak spectrum fit

Power-law model

Time interval is from   -4.688 sec. to   -3.688 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.39779     ( -0.234916   0.233809 )
Norm@50keV  : 9.93605E-03    ( -0.00148986   0.00148416 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.30 using 59 PHA bins.
# Reduced chi-squared =          1.058 for     57 degrees of freedom 
# Null hypothesis probability =   3.573148e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.20945 ( -0.18012  0.1804 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.60616e-08 ( -1.5746e-08  1.59673e-08 ) ergs/cm2
 

Cutoff power-law model

Time interval is from   -4.688 sec. to   -3.688 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.185928     ( -1.09753   1.42173 )
Epeak [keV] : 68.5343      ( -14.0274 45.1198 )
Norm@50keV  : 6.26211E-02    ( -0.0626208   0.243531 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.67 using 59 PHA bins.
# Reduced chi-squared =         0.9583 for     56 degrees of freedom 
# Null hypothesis probability =   5.636667e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.14607 ( -0.184913  0.18555 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.6812e-08 ( -1.59522e-08  1.68573e-08 ) ergs/cm2
 

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = 62.856 sec.
Hardness ratio (energy fluence ratio) = 1.35506400125

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

S(15-50 keV)  = 1.1059215e-06
S(50-150 keV) = 1.6682593e-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 = -7.043718197915397E-02, IMY = -3.105275447601950E-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:
-68.427400 -42.748000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.3901  35.3282    3.6  24.9  178.4   0.1931   3.2    3.4	Her X-1                       
200.0386  40.0949    2.8  23.2   52.1   0.2942   4.1 ------	UNKNOWN                       
191.9873  -5.0274    2.4  47.4  -22.7   0.5682   4.9 ------	UNKNOWN                       

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

Time interval of the image:
-42.748000 34.572590
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.5958  35.4058    5.3  25.0  178.3   0.4629   2.2    7.8	Her X-1                       
222.7994  47.3223    0.6  17.7  102.8   4.4537  19.5 ------	UNKNOWN                       
193.9613  15.2906    2.2  32.4   -0.7   1.2934   5.3 ------	UNKNOWN                       
286.5168  23.3353    2.5  54.3 -169.8   2.8064   4.7 ------	UNKNOWN                       

Post-slew image of 15-350 keV band

Time interval of the image:
73.572600 799.072580
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.4918  35.3395    1.2  26.4 -141.0   4.8527   9.3    1.7	Her X-1                       
299.5915  35.2067    4.3  56.6 -174.0   6.0716   2.7    0.3	Cyg X-1                       
302.3897  71.3980    2.5  42.7  141.3   6.0926   4.5 ------	UNKNOWN                       
169.4395  13.9046    4.0  55.3    5.1   6.9388   2.9 ------	UNKNOWN                       
291.7869  43.3734    3.3  47.0 -178.3   3.6307   3.5 ------	UNKNOWN                       
230.8264  16.4343    2.8  31.5  -81.1   3.0213   4.1 ------	UNKNOWN                       
245.5546  20.4937    3.1  32.5 -108.7   2.9847   3.8 ------	UNKNOWN                       
280.7297  18.1097    4.5  55.2 -145.1   9.4243   2.6 ------	UNKNOWN                       
198.6491  -2.7449    3.1  54.3  -36.1  10.8961   3.8 ------	UNKNOWN                       
259.8977  14.1300    3.2  45.2 -121.8   7.0812   3.6 ------	UNKNOWN