batgrbproduct Analysis for Trigger=450884

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Mon Jan 13 23:12:48 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger450884
======================================================================

  Trigger: 00450884      Segment: 000

  BAT Trigger Time: 323878008   [s; MET]
      Trigger Stop: 323878072   [s; MET]
               UTC: 2011-04-07T14:06:41.167860    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 185.996625275413   Dec: 15.7178020980355  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    14.72
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    14.72

  Flight Position:   [ source = BAT ]
    RA: 185.996625275413   Dec: 15.7178020980355  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 186.02373181947   Dec: 15.7237201700124  [deg; J2000]  
        { 12h 24m 05.7s , +15d 43' 25.4" }
         +/- 1.47000361396692 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.571553597285787 [arcmin] (formal 1-sigma fit error)
    SNR: 17.5425244608379
 
  Angular difference between Flight and Ground position is 1.605319 arcmin
 
  Partial Coding Fraction: 0.7734375    [ including projection effects ]

  Duration
     T90: 155.567999958992 +/- 21.1666227540407
        Measured from: 2.35600000619888
                   to: 157.923999965191     [s; relative to TRIGTIME]
     T50: 71.635999917984 +/- 21.0609268757043
        Measured from: 26.3320000171661
                   to: 97.9679999351501     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 27.6399999856949     
                   to: 28.6399999856949     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -2.89999997615814     
                   to: 178.51599997282     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.013862   1.361866   0.774008   0.110093
           0.074262   0.076154   0.067491   0.060194 [error]
 Peak      0.016251   0.019724   0.022775   0.011490
           0.005872   0.006217   0.005445   0.004633 [error]

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

======================================================================
 
=== 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   Power-law 3.26e-07 5.20e-07 6.26e-07 1.48e-06 1.90e-06 2.95e-06   erg/cm2
              Error 3.51e-08 3.57e-08 6.51e-08 3.17e-07 1.52e-07 3.76e-07   erg/cm2
Peak flux Power-law 1.23e-01 1.61e-01 1.55e-01 2.64e-01 5.26e-01 7.03e-01   ph/cm2/s
              Error 6.78e-02 5.32e-02 4.45e-02 1.80e-01 1.40e-01 2.00e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.84e-07 5.74e-07 6.25e-07 3.77e-07 1.72e-06 1.86e-06   erg/cm2
              Error 4.26e-08 4.84e-08 7.50e-08 3.03e-07 1.75e-07 3.48e-07   erg/cm2
Peak flux Cutoff-PL 1.26e-01 1.63e-01 1.54e-01 2.55e-01 5.28e-01 7.00e-01   ph/cm2/s
              Error 5.33e-02 5.34e-02 4.54e-02 2.42e-01 1.40e-01 4.46e-01   ph/cm2/s
 
Fluence        Band -------- -------- -------- -------- -------- --------   erg/cm2
              Error -------- -------- -------- -------- -------- --------   erg/cm2
Peak flux      Band -------- -------- -------- -------- -------- --------   ph/cm2/s
              Error -------- -------- -------- -------- -------- --------   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.731    0.125    -      -           1.13e-03 8.63e-05   54.710 57
CPL   0.737    0.642      57.8   15.2      3.86e-03 3.56e-03   45.840 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.057    0.505    -      -           4.55e-03 1.18e-03   58.680 57
CPL   1.066    0.509    9999.4    0.0      4.56e-03 6.99e-03   58.690 56
 
Model      : spectral model: simple power-law (PL) and cutoff power-law (CPL)
Ph_index   : photon index: E^-{Ph_index} (minus sign is not included in the 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 PL model and at 1 keV in CPL model
Nomr_90err : 90% error of the normalization
chi2       : Chi-Squared
dof        : degree of freedom
 
=== T90/T50 calculation in the 50-300 keV band (BATSE band) using 64 ms lc ===
 
T90 in the 50-300 keV band: 146.816000 sec.
T50 in the 50-300 keV band: 50.944000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  181.416   -2.900  178.516
T90   155.568    2.356  157.924
T50    71.636   26.332   97.968
Peak    1.000   27.640   28.640
  • Click here for the BAT GCN circular template

    Image

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

    #   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
      186.0237    15.7237   0.0109    19.9952   135.4237         1.9565756     17.543 TRIG_00450884                 
     
    Foreground time interval of the image:
     -2.900  73.301 (delta_t =  76.201 [sec])
    Background time interval of the image:
    -239.000  -2.900 (delta_t = 236.100 [sec])
    

    Lightcurves

    Notes:

    1 s binning

    From T0-310 s to T0+310 s
    From T100_start - 20 s to T100_end + 30 s
    Full time interval

    64 ms binning

    Full time interval
    From T100_start to T100_end
    From T0-5 sec to T0+5 sec

    16 ms binning

    From T100_start-5 s to T100_start+5 s

    8 ms binning

    From T100_start-3 s to T100_start+3 s

    2 ms binning

    From T100_start-1 s to T100_start+1 s

    SN=5 or 10 sec. binning (whichever binning is satisfied first)

    SN=5 or 10 sec. binning (T < 200 sec)

    Quad-rate summed light curves (from T0-300s to T0+1000s)

    The mask-weighted light curves based on cleaned DPHs

    Spectral Evolution

    Spectra

    Notes:

    Time averaged spectrum fit using the average DRM

    Power-law model
    Time interval is from   -2.900 sec. to  178.516 sec.
     
    Spectral model in power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 1.73080     ( -0.123702   0.126449 )
    Norm@50keV  : 1.13137E-03    ( -8.67424e-05   8.58899e-05 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          54.71 using 59 PHA bins.
    # Reduced chi-squared =         0.9598 for     57 degrees of freedom 
    # Null hypothesis probability =   5.614484e-01
     
    Photon flux (15-150 keV)    in 181.4 sec: 0.151912 ( -0.0105104  0.0105189 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 1.89597e-06 ( -1.51162e-07  1.53002e-07 ) ergs/cm2
     
    
    Cutoff power-law model
    Time interval is from   -2.900 sec. to  178.516 sec.
    Spectral model in the cutoff power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 0.737274     ( -0.689957   0.593731 )
    Epeak [keV] : 57.7805      ( -8.74693 21.7011 )
    Norm@50keV  : 3.86385E-03    ( -0.00198444   0.00514088 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          45.84 using 59 PHA bins.
    # Reduced chi-squared =         0.8185 for     56 degrees of freedom 
    # Null hypothesis probability =   8.318219e-01
     
    Photon flux (15-150 keV)    in 181.4 sec: 0.144332 ( -0.011355  0.01136 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 1.72475e-06 ( -1.7136e-07  1.78463e-07 ) ergs/cm2
     
    
    Band function
    Time interval is from   -2.900 sec. to  178.516 sec.
     
    Spectral model in the Band function:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    alpha       : -0.717928   ( -0.598383   1.02343 )
    beta        : -2.84313    ( 2.75274   0.784854 )
    Epeak [keV] : 56.9904      ( -12.6841 21.9117 )
    Norm@50keV   : 3.98703E-03    ( -0.00229814   0.0118634 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          45.69 using 59 PHA bins.
    # Reduced chi-squared =         0.8308 for     55 degrees of freedom 
    # Null hypothesis probability =   8.101259e-01
     
    Photon flux (15-150 keV)    in 181.4 sec: 0.144354 ( 6.85565  -0.011309 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
     
    
    Single BB
     
    Spectral model blackbody:
    ------------------------------------------------------------
    Parameters  : value    Lower 90%  Upper 90%
    kT [keV]    : 12.3696  (-0.925957  1.01351)
    R^2/D10^2   : 3.30968E-02  (-0.00833834   0.0109947)
    (R is the radius in km and D10 is the distance to the source in units of 10 kpc)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          66.66 using 59 PHA bins.
    # Reduced chi-squared =          1.169 for     57 degrees of freedom 
    # Null hypothesis probability =   1.788778e-01
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  1.947e-07   2.415e-08
    25- 50  6.345e-07   4.762e-08
    50-150  5.954e-07   9.886e-08
    15-150  1.425e-06   1.110e-07
    
    Thermal bremsstrahlung (OTTB)
     
     
    Spectral model: thermal bremsstrahlung
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT [keV]    : 116.879       (-29.9415      41.8829)
    Norm        : 0.643537       (-0.0549339     0.070463)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          48.29 using 59 PHA bins.
    # Reduced chi-squared =         0.8471 for     57 degrees of freedom 
    # Null hypothesis probability =   7.877137e-01
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  3.044e-07   3.156e-08
    25- 50  5.420e-07   5.342e-08
    50-150  9.547e-07   3.449e-07
    15-150  1.801e-06   3.413e-07
    
    Double BB
     
     
    Spectral model: bbodyrad<1> + bbodyrad<2>
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT1 [keV]   : 3.65666        (-1.60583      3.6355)
    R1^2/D10^2  : 1.53710        (-1.38823      47.4909)
    kT2 [keV]   : 14.6345        (-1.78519      4.97319)
    R2^2/D10^2  : 1.62580E-02    (-0.0118887   0.00952262)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          46.76 using 59 PHA bins.
    # Reduced chi-squared =         0.8502 for     55 degrees of freedom 
    # Null hypothesis probability =   7.775463e-01
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  2.941e-07   1.113e-07
    25- 50  5.601e-07   1.058e-07
    50-150  7.431e-07   1.536e-07
    15-150  1.597e-06   2.417e-07
    

    Peak spectrum fit

    Power-law model
    Time interval is from   27.640 sec. to   28.640 sec.
     
    Spectral model in power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 1.05720     ( -0.531931   0.47904 )
    Norm@50keV  : 4.55356E-03    ( -0.00118537   0.00117192 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          58.68 using 59 PHA bins.
    # Reduced chi-squared =          1.030 for     57 degrees of freedom 
    # Null hypothesis probability =   4.135429e-01
     
    Photon flux (15-150 keV)    in 1 sec: 0.526211 ( -0.139684  0.140215 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 4.82804e-08 ( -1.35865e-08  1.37965e-08 ) ergs/cm2
     
    
    Cutoff power-law model
    Time interval is from   27.640 sec. to   28.640 sec.
    Spectral model in the cutoff power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 1.06560     ( -0.548739   0.470017 )
    Epeak [keV] : 9999.36      ( -9999.36 -9999.36 )
    Norm@50keV  : 4.56277E-03    ( -0.00117048   0.0128182 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          58.69 using 59 PHA bins.
    # Reduced chi-squared =          1.048 for     56 degrees of freedom 
    # Null hypothesis probability =   3.770172e-01
     
    Photon flux (15-150 keV)    in 1 sec: 0.528113 ( -0.141923  0.138244 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 4.82572e-08 ( -1.35322e-08  1.35882e-08 ) ergs/cm2
     
    
    Band function
    Time interval is from   27.640 sec. to   28.640 sec.
     
    Spectral model in the Band function:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    alpha       : -0.860318   ( 0.860318   0.860318 )
    beta        : -1.05717    ( 1.05717   0.531802 )
    Epeak [keV] : 59.5528      ( -59.5528 -59.5528 )
    Norm@50keV   : 7.56876E-03    ( -0.00417755   231748 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          58.68 using 59 PHA bins.
    # Reduced chi-squared =          1.067 for     55 degrees of freedom 
    # Null hypothesis probability =   3.420455e-01
     
    Photon flux (15-150 keV)    in 1 sec:  (    ) ph/cm2/s
    Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
     
    
    Single BB
     
    Spectral model blackbody:
    ------------------------------------------------------------
    Parameters  : value    Lower 90%  Upper 90%
    kT [keV]    : 22.8013  (-8.09765  17.1268)
    R^2/D10^2   : 1.58819E-02  (-0.0157247   0.0485766)
    (R is the radius in km and D10 is the distance to the source in units of 10 kpc)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          63.97 using 59 PHA bins.
    # Reduced chi-squared =          1.122 for     57 degrees of freedom 
    # Null hypothesis probability =   2.452541e-01
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  1.503e-09   9.505e-10
    25- 50  8.113e-09   4.739e-09
    50-150  3.151e-08   1.958e-08
    15-150  4.113e-08   2.432e-08
    
    Thermal bremsstrahlung (OTTB)
     
     
    Spectral model: thermal bremsstrahlung
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT [keV]    : 200.000       (      )
    Norm        : 2.15899       (-0.57427     0.574241)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          61.93 using 59 PHA bins.
    # Reduced chi-squared =          1.087 for     57 degrees of freedom 
    # Null hypothesis probability =   3.046118e-01
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  5.379e-09   3.307e-09
    25- 50  1.035e-08   6.210e-09
    50-150  2.269e-08   1.381e-08
    15-150  3.842e-08   2.288e-08
    
    Double BB
     
     
    Spectral model: bbodyrad<1> + bbodyrad<2>
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT1 [keV]   : 7.27692        (-4.20107      9.74308)
    R1^2/D10^2  : 0.449881        (-0.42024      13.6922)
    kT2 [keV]   : 47.4602        (-26.6395      -47.3876)
    R2^2/D10^2  : 1.72570E-03    (-0.00160706   0.0156274)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          58.28 using 59 PHA bins.
    # Reduced chi-squared =          1.060 for     55 degrees of freedom 
    # Null hypothesis probability =   3.557281e-01
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  4.419e-09   2.585e-09
    25- 50  9.020e-09   5.215e-09
    50-150  3.769e-08   2.058e-08
    15-150  5.113e-08   2.681e-08
    

    Pre-slew spectrum (Pre-slew PHA with pre-slew DRM)

    Power-law model
     
    Spectral model in power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 1.53590     ( -0.136476   0.138237 )
    Norm@50keV  : 1.68675E-03    ( -0.000139287   0.000138476 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          51.47 using 59 PHA bins.
    # Reduced chi-squared =         0.9030 for     57 degrees of freedom 
    # Null hypothesis probability =   6.816869e-01
     
    Photon flux (15-150 keV)    in 76.2 sec: 0.212671 ( -0.0169331  0.016951 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 1.21248e-06 ( -1.09177e-07  1.10396e-07 ) ergs/cm2
     
    
    Cutoff power-law model
    Spectral model in the cutoff power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 0.393295     ( -0.825928   0.689794 )
    Epeak [keV] : 66.6569      ( -11.3539 31.922 )
    Norm@50keV  : 6.63293E-03    ( -0.00368643   0.0110527 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          42.69 using 59 PHA bins.
    # Reduced chi-squared =         0.7624 for     56 degrees of freedom 
    # Null hypothesis probability =   9.047317e-01
     
    Photon flux (15-150 keV)    in 76.2 sec: 0.201031 ( -0.018292  0.018253 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 1.09378e-06 ( -1.24503e-07  1.29045e-07 ) ergs/cm2
     
    
    Band function
     
    Spectral model in the Band function:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    alpha       : 5.15441E-02   ( -1.02741   1.48667 )
    beta        : -2.28185    ( 2.3064   0.545786 )
    Epeak [keV] : 57.2963      ( -16.0003 31.293 )
    Norm@50keV   : 1.20997E-02    ( -0.00608695   0.0869959 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          41.98 using 59 PHA bins.
    # Reduced chi-squared =         0.7633 for     55 degrees of freedom 
    # Null hypothesis probability =   9.015385e-01
     
    Photon flux (15-150 keV)    in 76.2 sec:  (    ) ph/cm2/s
    Energy fluence (15-150 keV)             : 1.11126e-06 ( -1.11072e-06  -1.27262e-07 ) ergs/cm2
     
    

    S(25-50 keV) vs. S(50-100 keV) plot

    S(25-50 keV)  = 5.20e-07
    S(50-100 keV) = 6.26e-07
    

    T90 vs. Hardness ratio plot

    T90                                   = 155.567999958992 sec.
    Hardness ratio (energy fluence ratio) = 1.20385
    

    Color vs. Color plot

    Count Ratio  (25-50 keV) / (15-25 keV) = 1.34325
    Count Ratio (50-100 keV) / (15-25 keV) = 0.763425
    

    Mask shadow pattern

    IMX = -2.591940828177663E-01, IMY = -2.553889295409928E-01
    

    TIME vs. PHA plot around the trigger time

    TIME vs. DetID plot around the trigger time

    100 us light curve (15-350 keV)

    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:
    -239.000000 -2.900000
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
    244.9809 -15.6351    0.9  50.1   -3.6   5.5792  13.3    0.3	Sco X-1                       
    208.0547  48.8844    2.9  31.5 -131.2   0.9656   3.9 ------	UNKNOWN                       
    246.1343  17.3208    2.1  37.5  -48.7   1.4570   5.6 ------	UNKNOWN                       
    261.6547  -5.9384    2.5  59.0  -24.3   5.8424   4.6 ------	UNKNOWN                       
    176.5633  69.4347    5.8  55.3 -145.2   2.4447   2.0 ------	UNKNOWN                       
    

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

    Time interval of the image:
    -2.900000 73.300610
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
    245.0357 -15.7160    4.7  50.2   -3.6   0.5959   2.4    5.6	Sco X-1                       
    186.0237  15.7242    0.7  20.0  135.4   1.9645  17.6 ------	UNKNOWN                       
    

    Post-slew image of 15-350 keV band

    Time interval of the image:
    146.100600 963.035900
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
    187.8588  -1.4241    2.6  17.3  108.5   1.9680   4.4 ------	UNKNOWN                       
    200.0085  11.6216    2.6  14.2   39.9   1.8163   4.3 ------	UNKNOWN                       
    239.6768  42.4881    2.6  52.8  -17.1   5.0424   4.4 ------	UNKNOWN                       
    128.2432  17.0097    5.7  55.2 -145.2   6.8266   2.1 ------	UNKNOWN                       
    
    Plot creation:
    Sat May 30 22:35:41 EDT 2015