GRB050607: 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: Wed Jan 22 21:50:38 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger132247
======================================================================

  Trigger: 00132247      Segment: 000

  BAT Trigger Time: 139828282.368   [s; MET]
      Trigger Stop: 139828283.392   [s; MET]
               UTC: 2005-06-07T09:11:22.807560    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 300.166992902482   Dec: 9.13699352299647  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9
     Image Trigger?:     NO
     Rate S/N Ratio:     18.1383571472171  [ if not an image trigger ]
     Image S/N Ratio:    9

  Analysis Position:   [ source = BAT ]
    RA: 300.166992902482   Dec: 9.13699352299647  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 300.180869821667   Dec: 9.13111981264177  [deg; J2000]  
        { 20h 00m 43.4s , +09d 07' 52.0" }
         +/- 1.51118549977616 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.543115261093875 [arcmin] (formal 1-sigma fit error)
    SNR: 16.8635935437948
 
  Angular difference between the analysis and refined position is 0.894416 arcmin
 
  Partial Coding Fraction: 0.8359375    [ including projection effects ]

  Duration
     T90: 48 +/- 22.6274169979695
        Measured from: -11.3680000007153
                   to: 36.6319999992847     [s; relative to TRIGTIME]
     T50: 16 +/- 16
        Measured from: -11.3680000007153
                   to: 4.63199999928474     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 12.1319999992847     
                   to: 13.1319999992847     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -11.3680000007153     
                   to: 36.6319999992847     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.387469   0.457089   0.218004   0.061574
           0.035640   0.036169   0.030520   0.024851 [error]
 Peak      0.018113   0.005771   0.005803   0.000973
           0.005439   0.005379   0.004450   0.003626 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100   48.000  -11.368   36.632
T90    48.000  -11.368   36.632
T50    16.000  -11.368    4.632
Peak    1.000   12.132   13.132
 
 
====== 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      -1.916    -0.181      0.174       -           -               -         1.38e-03     -1.59e-04          1.55e-04      66.170   57
CPL     -1.797    -0.475      0.836       73.427     -73.349       -73.427      1.62e-03     -9.19e-04          3.20e-03      66.090   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      -2.110     -1.281     0.885       -           -               -         1.67e-03     -1.67e-03          1.08e-03      55.990   57
CPL     -1.596      N/A       N/A          31.519      N/A           N/A         3.40e-03        N/A               N/A         55.950   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   1.26e-07  1.79e-07  1.90e-07  3.72e-07  6.11e-07  8.67e-07   erg/cm2
      90%_error_low -1.74e-08 -1.68e-08 -2.95e-08 -1.05e-07 -6.77e-08 -1.38e-07   erg/cm2
      90%_error_hi   1.79e-08  1.68e-08  2.98e-08  1.30e-07  6.87e-08  1.57e-07   erg/cm2
Peak flux       PL   1.24e-01  8.71e-02  4.04e-02  2.62e-02  2.64e-01  2.78e-01   ph/cm2/s
      90%_error_low -7.48e-02 -4.56e-02 -3.16e-02 -2.62e-02 -1.27e-01 -1.35e-01   ph/cm2/s
      90%_error_hi   8.10e-02  4.28e-02  3.65e-02  6.84e-02  1.27e-01  1.37e-01   ph/cm2/s
 
Fluence        CPL   1.24e-07  1.82e-07  1.89e-07  2.96e-07  6.03e-07  7.92e-07   erg/cm2
      90%_error_low -1.95e-08 -1.91e-08 -3.12e-08 -2.16e-07 -8.25e-08 -2.37e-07   erg/cm2
      90%_error_hi   1.93e-08  2.40e-08  3.04e-08  1.00e-07  7.48e-08  1.24e-07   erg/cm2
Peak flux      CPL   1.20e-01  9.31e-02  3.97e-02  1.25e-02  2.61e-01  2.65e-01   ph/cm2/s
      90%_error_low -1.20e-01     N/A   -3.97e-02 -1.25e-02     N/A       N/A     ph/cm2/s
      90%_error_hi   8.11e-02     N/A    3.92e-02  4.39e-02     N/A       N/A     ph/cm2/s
 
======================================================================

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  300.1809     9.1311   0.0114    27.0509     3.0420         0.9011650     16.864 TRIG_00132247                 
 
Foreground time interval of the image:
-11.368  16.533 (delta_t =  27.901 [sec])
Background time interval of the image:
-101.867 -11.368 (delta_t =  90.499 [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  -11.368 sec. to   36.632 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.91624     ( -0.181448   0.174385 )
Norm@50keV  : 1.38378E-03    ( -0.000158554   0.000155186 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.17 using 59 PHA bins.
# Reduced chi-squared =          1.161 for     57 degrees of freedom 
# Null hypothesis probability =   1.898920e-01
 
Photon flux (15-150 keV)    in 48 sec: 0.199982 ( -0.018969  0.01898 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.10872e-07 ( -6.76954e-08  6.87245e-08 ) ergs/cm2
 

Cutoff power-law model

Time interval is from  -11.368 sec. to   36.632 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.797     ( -0.474977   0.836444 )
Epeak [keV] : 73.4273      ( -73.5095 -73.588 )
Norm@50keV  : 1.61758E-03    ( -0.000917904   0.00320144 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.09 using 59 PHA bins.
# Reduced chi-squared =          1.180 for     56 degrees of freedom 
# Null hypothesis probability =   1.675848e-01
 
Photon flux (15-150 keV)    in 48 sec: 0.199027 ( -0.019882  0.009828 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.0313e-07 ( -8.24851e-08  7.47792e-08 ) ergs/cm2
 

1-s peak spectrum fit

Power-law model

Time interval is from   12.132 sec. to   13.132 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.11048     ( -1.28118   0.885201 )
Norm@50keV  : 1.66970E-03    ( -0.0016697   0.00107546 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.99 using 59 PHA bins.
# Reduced chi-squared =         0.9823 for     57 degrees of freedom 
# Null hypothesis probability =   5.128489e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.264076 ( -0.127097  0.127117 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.55321e-08 ( -8.86296e-09  9.87938e-09 ) ergs/cm2
 

Cutoff power-law model

Time interval is from   12.132 sec. to   13.132 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.59608     (       )
Epeak [keV] : 31.5193      (   )
Norm@50keV  : 3.39505E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.95 using 59 PHA bins.
# Reduced chi-squared =         0.9990 for     56 degrees of freedom 
# Null hypothesis probability =   4.769273e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.261128 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.48177e-08 ( 0  0 ) ergs/cm2
 

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = 48.0 sec.
Hardness ratio (energy fluence ratio) = 1.05981496303

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

S(15-50 keV)  = 3.047126e-07
S(50-150 keV) = 3.061679e-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 = 5.099258376762459E-01, IMY = -2.709861638310307E-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:
-101.867410 -11.368000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.3745  35.3822    4.7  22.2  177.4   0.2167   2.4    4.7	Her X-1                       
268.1795  -1.5187   14.1  29.4   78.2   0.1279   0.8   12.0	SW J1753.5-0127               
273.8709 -14.1304   36.7  40.7   64.0  -0.1089  -0.3    9.7	GX 17+2                       
288.6952  10.8412    3.4  18.4   22.9   0.3043   3.3    8.7	GRS 1915+105                  
299.5895  35.1941    0.4  20.4  -63.3   3.0103  30.7    0.5	Cyg X-1                       
308.0900  40.9411    2.1  28.7  -70.6   0.6806   5.6    1.1	Cyg X-3                       
326.2431  38.4584    5.6  41.9  -61.6  -0.5794  -2.1    8.9	Cyg X-2                       
298.0005   6.6955    1.8  27.3   10.2   0.6183   6.3 ------	UNKNOWN                       
232.5064  37.2358    2.1  39.9  175.1   0.6850   5.5 ------	UNKNOWN                       
335.9641  21.0621    2.3  52.8  -39.7   2.1708   5.0 ------	UNKNOWN                       

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

Time interval of the image:
-11.368000 16.532600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.2555  35.3275    9.1  22.3  177.2  -0.0638  -1.3    9.9	Her X-1                       
268.4070  -1.5447    6.5  29.4   77.7  -0.1573  -1.8    6.0	SW J1753.5-0127               
274.0983 -13.9375   15.5  40.4   63.7   0.1548   0.7    8.0	GX 17+2                       
288.5981  10.9071    5.1  18.3   23.0  -0.1139  -2.2   12.0	GRS 1915+105                  
299.7356  35.1206    4.9  20.5  -63.0   0.1302   2.3    8.6	Cyg X-1                       
307.9088  40.9060    5.8  28.6  -70.6  -0.1465  -2.0    9.5	Cyg X-3                       
326.1398  38.1467    7.6  41.8  -61.1   0.2249   1.5   10.6	Cyg X-2                       
300.1802   9.1309    0.7  27.1    3.0   0.9000  16.8 ------	UNKNOWN                       
209.1542  40.1198    2.5  57.9 -179.8   1.4591   4.6 ------	UNKNOWN                       

Post-slew image of 15-350 keV band

Time interval of the image:
66.132590 302.714300
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.4103  35.2776    5.0  49.2  166.3   1.0990   2.3    4.5	Her X-1                       
268.3893  -1.6074   21.9  33.4  109.8  -0.1729  -0.5    9.4	SW J1753.5-0127               
274.0025 -13.9993    3.5  34.8   85.6   1.2454   3.3    2.2	GX 17+2                       
285.0072 -24.8838    6.4  37.1   60.1  -0.7245  -1.8    2.7	HT1900.1-2455                 
288.8742  11.0267    3.9  11.3  137.7   0.4316   2.9    6.6	GRS 1915+105                  
299.5915  35.2045    0.2  26.1 -144.1   8.1105  49.1    0.2	Cyg X-1                       
308.1168  40.9738    1.4  32.6 -131.9   1.7669   8.5    1.3	Cyg X-3                       
326.1576  38.4492   15.6  37.5 -108.7   0.3040   0.7    7.7	Cyg X-2