batgrbproduct Analysis for Trigger=434178

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Wed Sep 15 17:29:59 EDT 2010
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger434178/GCN5_download_cron
======================================================================

  Trigger: 00434178      Segment: 000

  BAT Trigger Time: 306207072   [s; MET]
      Trigger Stop: 306207136   [s; MET]
               UTC: 2010-09-15T01:31:05.822060    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 315.648430088771   Dec: 65.6666778587913  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.67
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    8.67

  Flight Position:   [ source = BAT ]
    RA: 315.648430088771   Dec: 65.6666778587913  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 315.664074439866   Dec: 65.6757044461074  [deg; J2000]  
        { 21h 02m 39.4s , +65d 40' 32.5" }
         +/- 1.97862149948311 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.00167046921787 [arcmin] (formal 1-sigma fit error)
    SNR: 11.4747454547591
 
  Angular difference between Flight and Ground position is 0.665481 arcmin
 
  Partial Coding Fraction: 0.546875    [ including projection effects ]

  Duration
     T90: 200.311999976635 +/- 30.7987433238743
        Measured from: -29.175999879837
                   to: 171.136000096798     [s; relative to TRIGTIME]
     T50: 70.4079999923706 +/- 50.2711478372112
        Measured from: -5.63199990987778
                   to: 64.7760000824928     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 8.75999999046326     
                   to: 9.75999999046326     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -36.3040000200272     
                   to: 190.083999991417     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.741929   0.819656   0.719310   0.320595
           0.092153   0.094559   0.084391   0.075646 [error]
 Peak      0.024688   0.006938   0.019917   0.014585
           0.006886   0.007055   0.006518   0.005847 [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 2.05e-07 3.76e-07 5.31e-07 1.58e-06 1.52e-06 2.69e-06   erg/cm2
              Error 4.39e-08 4.54e-08 8.75e-08 5.97e-07 2.04e-07 6.55e-07   erg/cm2
Peak flux Power-law 2.80e-01 1.45e-01 8.11e-02 1.13e-02 1.77e-03 4.06e-01   ph/cm2/s
              Error 1.47e-01 7.16e-02 9.84e-02 2.58e-01 3.56e-01 0.00e+00   ph/cm2/s
 
Fluence   Cutoff-PL 2.05e-07 3.76e-07 5.32e-07 1.57e-06 1.52e-06 2.68e-06   erg/cm2
              Error 4.40e-08 4.54e-08 8.77e-08 5.92e-07 2.04e-07 6.50e-07   erg/cm2
Peak flux Cutoff-PL 2.92e-01 1.33e-01 3.50e-02 1.02e-02 4.66e-01 4.83e-01   ph/cm2/s
              Error 1.47e-01 1.11e-01 7.15e-02 2.81e-01 0.00e+00 0.00e+00   ph/cm2/s
 
Fluence        Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   erg/cm2
              Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   erg/cm2
Peak flux      Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   ph/cm2/s
              Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.501    0.234    -      -           7.10e-04 8.43e-05   72.830 57
CPL   2.688    0.000     218.4    0.0      1.91e-04 0.00e+00   66.430 56
 
The chi2 of BB fit is  which shows a significant improvement in the fit over a PL.
Check the BB fit.
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    3.286    0.000    -      -           1.30e-03 2.43e-03   73.040 57
CPL   7.718    0.000     766.8    0.0      6.77e-06 0.00e+00   60.540 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: 52.992000 sec.
T50 in the 50-300 keV band: 26.304000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  226.388  -36.304  190.084
T90   200.312  -29.176  171.136
T50    70.408   -5.632   64.776
Peak    1.000    8.760    9.760

Image

Pre-slew 15-350 keV image (Event data; bkg subtracted)

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  315.6641 +65.6757 0.0168   26.9 -103.7       1.9677    11.5  TRIG_00434178       
------------------------------------------
 
Foreground time interval of the image:
-36.304  38.130 (delta_t =  74.434 [sec])
 39.000  72.201 (delta_t =  33.201 [sec])
Background time interval of the image:
-239.000 -56.336 (delta_t = 182.664 [sec])
-55.000 -36.304 (delta_t =  18.696 [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)

Spectra

Notes:

Time averaged spectrum fit using the pre-slew DRM

Power-law model
Multiple GTIs in the spectrum
tstart tstop
-36.304000 38.130000
39.000000 190.084000
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.50053     ( -0.23232   0.236293 )
Norm@50keV  : 7.10471E-04    ( -8.49112e-05   8.3626e-05 )
------------------------------------------------------------
# Chi-Squared =          72.83 using 59 PHA bins.
# Reduced chi-squared =          1.278 for     57 degrees of freedom 
# Null hypothesis probability =   7.703828e-02
 
Photon flux (15-150 keV)    in 225.5 sec: 8.87076E-02 ( -0.0103274  0.0103572 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.51971e-06 ( -2.02994e-07  2.055e-07 ) ergs/cm2
 
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-36.304000 38.130000
39.000000 190.084000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.68781     (     )
Epeak [keV] : 218.381      (   )
Norm@50keV  : 1.90664E-04    (     )
------------------------------------------------------------
# Chi-Squared =          66.43 using 59 PHA bins.
# Reduced chi-squared =          1.186 for     56 degrees of freedom 
# Null hypothesis probability =   1.604798e-01
 
Photon flux (15-150 keV)    in 225.5 sec: 8.86635E-02 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.51961e-06 ( -2.03056e-07  2.05582e-07 ) ergs/cm2
 
Band function
Multiple GTIs in the spectrum
tstart tstop
-36.304000 38.130000
39.000000 190.084000
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.25440   ( 1.2544   1.2544 )
beta        : -1.50050    ( -0.236126   0.232511 )
Epeak [keV] : 18.6294      ( -18.6294 -18.6294 )
Norm@50keV   : 1.52206E-03    ( -0.00152205   4473.6 )
------------------------------------------------------------
# Chi-Squared =          72.83 using 59 PHA bins.
# Reduced chi-squared =          1.324 for     55 degrees of freedom 
# Null hypothesis probability =   5.403943e-02
 
Photon flux (15-150 keV)    in 225.5 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]    :   (  )
R^2/D10^2   :   (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25     
25- 50     
50-150     
15-150     
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    :        (      )
Norm        :        (     )
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25     
25- 50     
50-150     
15-150     
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   :         (      )
R1^2/D10^2  :         (      )
kT2 [keV]   :         (      )
R2^2/D10^2  :     (   )
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25     
25- 50     
50-150     
15-150     

Peak spectrum fit

Power-law model
Time interval is from    8.760 sec. to    9.760 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 3.28590     (     )
Norm@50keV  : 1.30008E-03    ( -0.00130008   0.00355512 )
------------------------------------------------------------
# Chi-Squared =          73.04 using 59 PHA bins.
# Reduced chi-squared =          1.281 for     57 degrees of freedom 
# Null hypothesis probability =   7.471012e-02
 
Photon flux (15-150 keV)    in 1 sec: 0.406255 ( -0.257935  0.258653 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.49303e-08 ( -1.49389e-08  3.08898e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    8.760 sec. to    9.760 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 7.71837     (     )
Epeak [keV] : 766.770      (   )
Norm@50keV  : 6.76695E-06    (     )
------------------------------------------------------------
# Chi-Squared =          60.54 using 59 PHA bins.
# Reduced chi-squared =          1.081 for     56 degrees of freedom 
# Null hypothesis probability =   3.153948e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.465603 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.10145e-08 ( -2.10145e-08  2.47812e-08 ) ergs/cm2
 
Band function
Time interval is from    8.760 sec. to    9.760 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -8.78849   ( 2.29959   6.58726 )
beta        : -3.28920    ( -6.27449   2.08057 )
Epeak [keV] : 411.444      ( -411.444 -411.444 )
Norm@50keV   : 0.176155    ( -0.175913   0.483713 )
------------------------------------------------------------
# Chi-Squared =          73.04 using 59 PHA bins.
# Reduced chi-squared =          1.328 for     55 degrees of freedom 
# Null hypothesis probability =   5.228375e-02
 
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]    :   (  )
R^2/D10^2   :   (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25     
25- 50     
50-150     
15-150     
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    :        (      )
Norm        :        (     )
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25     
25- 50     
50-150     
15-150     
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   :         (      )
R1^2/D10^2  :         (      )
kT2 [keV]   :         (      )
R2^2/D10^2  :     (   )
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25     
25- 50     
50-150     
15-150     
Plot creation:
Wed Sep 15 17:52:03 EDT 2010