batgrbproduct analysis for trigger=294974

batgrbproduct Analysis for Trigger=294974

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 (local time): Mon Jan 20 06:12:55 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger294974
======================================================================

  Trigger: 00294974      Segment: 000

  BAT Trigger Time: 214652496   [s; MET]
      Trigger Stop: 214652560   [s; MET]
               UTC: 2007-10-21T09:41:33.693520    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 340.635921111961   Dec: 23.70672778378  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.96
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    7.96

  Flight Position:   [ source = BAT ]
    RA: 340.635921111961   Dec: 23.70672778378  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 340.636   Dec: 23.7067  [deg; J2000]
        { 22h 42m 32.6s , +23d 42' 24.1" }
        +/- 2.65085115519 [arcmin] (estimated 90% radius based on SNR)
    SNR: 7.55681853728
 
 
  Angular difference between Flight and Ground position is 0.004643 arcmin
 
  Partial Coding Fraction: 0.78125    [ including projection effects ]

  Duration
     T90: 228.719999998808 +/- 74.010168577502
        Measured from: -15.7039999961853
                   to: 213.016000002623     [s; relative to TRIGTIME]
     T50: 56.7920000255108 +/- 26.4564581830029
        Measured from: 35.0719999969006
                   to: 91.8640000224113     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 87.3039999902248     
                   to: 88.3039999902248     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -33.5760000050068     
                   to: 250.759999990463     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.778689   0.838050   0.608620   0.127047
           0.081140   0.084552   0.075731   0.068147 [error]
 Peak      0.018853   0.029722   0.025095   0.006295
           0.005040   0.005429   0.004985   0.004259 [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 2.18e-07 3.62e-07 4.57e-07 1.15e-06 1.36e-06 2.19e-06   erg/cm2
              Error 3.59e-08 3.78e-08 7.49e-08 3.95e-07 1.74e-07 4.62e-07   erg/cm2
Peak flux Power-law 1.85e-01 2.05e-01 1.62e-01 2.13e-01 6.31e-01 7.65e-01   ph/cm2/s
              Error 6.41e-02 4.30e-02 4.05e-02 1.14e-01 1.22e-01 1.58e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.18e-07 3.63e-07 4.57e-07 1.14e-06 1.36e-06 2.17e-06   erg/cm2
              Error 3.67e-08 3.77e-08 7.50e-08 6.91e-07 1.78e-07 5.44e-07   erg/cm2
Peak flux Cutoff-PL 1.85e-01 2.05e-01 1.62e-01 2.11e-01 6.31e-01 7.63e-01   ph/cm2/s
              Error 6.37e-02 4.44e-02 4.15e-02 1.72e-01 1.22e-01 1.79e-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    1.664    0.197    -      -           5.14e-04 6.09e-05   79.830 57
CPL   1.670    0.199    9999.4   -0.0      5.13e-04 4.51e-04   79.830 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.335    0.358    -      -           5.25e-03 1.03e-03   43.560 57
CPL   1.320    0.491    9998.0    0.0      5.28e-03 7.22e-03   43.570 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: 7.296000 sec.
T50 in the 50-300 keV band: 4.544000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  284.336  -33.576  250.760
T90   228.720  -15.704  213.016
T50    56.792   35.072   91.864
Peak    1.000   87.304   88.304

Click here for the BAT GCN circular template

Special notes of this burst

Image

Pre-slew 15.0-50.0 keV image (Event data)

#RAcent DECcent POSerr Theta  Phi  Peak_Cts  SNR Name
340.636 23.707 0.000 19.688 -110.452 0.441 7.557 TRIG_00294974
 
Image time interval: 0.000 to 64.000 [sec]

Lightcurves

Notes:

1) The mask-weighted light curves are using the flight position.
2) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
3) For all the mask-weighted lightcurves, the y-axis units are counts/sec/det where a det is 0.4 x 0.4 = 0.16 sq cm.
4) The verticle lines correspond to following: green dotted lines are T50 interval, black dotted lines are T90 interval, blue solid line(s) is a spacecraft slew start time, and orange solid line(s) is a spacecraft slew end time.
5) Time of each bin is in the middle of the bin.

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)

Spectral Evolution

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  -33.576 sec. to  250.760 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.66394     ( -0.194551   0.20024 )
Norm@50keV  : 5.14322E-04    ( -6.15316e-05   6.02358e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          79.83 using 59 PHA bins.
# Reduced chi-squared =          1.400 for     57 degrees of freedom 
# Null hypothesis probability =   2.467476e-02
 
Photon flux (15-150 keV)    in 284.3 sec: 6.74697E-02 ( -0.00703878  0.00704117 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.35807e-06 ( -1.72118e-07  1.75551e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -33.576 sec. to  250.760 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.66956     ( -0.200721   0.196822 )
Epeak [keV] : 9999.36      ( -9999.35 -9999.36 )
Norm@50keV  : 5.13290E-04    ( -0.000332395   0.000570298 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          79.83 using 59 PHA bins.
# Reduced chi-squared =          1.426 for     56 degrees of freedom 
# Null hypothesis probability =   1.993181e-02
 
Photon flux (15-150 keV)    in 284.3 sec: 6.74481E-02 ( -0.0070373  0.0070349 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.35694e-06 ( -1.82634e-07  1.74074e-07 ) ergs/cm2

Band function

Time interval is from  -33.576 sec. to  250.760 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.84281   ( -4.84281   -4.84281 )
beta        : -1.72321    ( -0.233247   0.214619 )
Epeak [keV] : 21.5622      ( -21.5622 4.59165 )
Norm@50keV   : 120.356    ( -12.4965   376535 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          79.44 using 59 PHA bins.
# Reduced chi-squared =          1.444 for     55 degrees of freedom 
# Null hypothesis probability =   1.721043e-02
 
Photon flux (15-150 keV)    in 284.3 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]    : 12.2229  (-1.82897  2.22762)
R^2/D10^2   : 1.48450E-02  (-0.00663652   0.0118708)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         110.84 using 59 PHA bins.
# Reduced chi-squared =         1.9446 for     57 degrees of freedom 
# Null hypothesis probability =   2.558830e-05
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.335e-07   2.670e-08
25- 50  4.293e-07   6.539e-08
50-150  3.904e-07   1.041e-07
15-150  9.533e-07   1.363e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 153.256       (-63.6932      -151.922)
Norm        : 0.276386       (-0.0313161     0.0414413)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          81.19 using 59 PHA bins.
# Reduced chi-squared =          1.424 for     57 degrees of freedom 
# Null hypothesis probability =   1.935807e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.014e-07   7.142e-08
25- 50  3.745e-07   1.734e-07
50-150  7.458e-07   4.308e-07
15-150  1.322e-06   6.610e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.64713        (-1.42072      1.79569)
R1^2/D10^2  : 0.179219        (-0.113049      0.350579)
kT2 [keV]   : 24.6102        (-6.25791      13.494)
R2^2/D10^2  : 1.01228E-03    (-0.000768205   0.00188298)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          79.24 using 59 PHA bins.
# Reduced chi-squared =          1.441 for     55 degrees of freedom 
# Null hypothesis probability =   1.785831e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.274e-07   9.710e-08
25- 50  3.433e-07   1.135e-07
50-150  7.854e-07   4.235e-07
15-150  1.356e-06   5.267e-07

Peak spectrum fit

Power-law model

Time interval is from   87.304 sec. to   88.304 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.33510     ( -0.356902   0.358291 )
Norm@50keV  : 5.25181E-03    ( -0.00103992   0.00102795 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.56 using 59 PHA bins.
# Reduced chi-squared =         0.7642 for     57 degrees of freedom 
# Null hypothesis probability =   9.049164e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.630785 ( -0.12205  0.122188 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.14678e-08 ( -1.15857e-08  1.18633e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   87.304 sec. to   88.304 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.32049     ( -0.61545   0.366313 )
Epeak [keV] : 9998.00      ( -9999.35 -9999.35 )
Norm@50keV  : 5.28053E-03    ( -0.0010457   0.0133934 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.57 using 59 PHA bins.
# Reduced chi-squared =         0.7780 for     56 degrees of freedom 
# Null hypothesis probability =   8.870142e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.630641 ( -0.121766  0.12203 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.13703e-08 ( -1.18366e-08  1.18332e-08 ) ergs/cm2

Band function

Time interval is from   87.304 sec. to   88.304 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.09800   ( 1.098   1.098 )
beta        : -1.33503    ( 1.33503   0.356876 )
Epeak [keV] : 33.1294      ( -33.1294 -33.1294 )
Norm@50keV   : 1.00740E-02    ( -0.00582633   0.12271 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.56 using 59 PHA bins.
# Reduced chi-squared =         0.7920 for     55 degrees of freedom 
# Null hypothesis probability =   8.669756e-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]    : 17.5277  (-4.93914  6.65832)
R^2/D10^2   : 4.22936E-02  (-0.0272774   0.0855504)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.78 using 59 PHA bins.
# Reduced chi-squared =         0.9260 for     57 degrees of freedom 
# Null hypothesis probability =   6.338560e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.623e-09   1.076e-09
25- 50  1.189e-08   4.775e-09
50-150  2.632e-08   1.138e-08
15-150  4.083e-08   1.643e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (-88.4427      -199.363)
Norm        : 2.57395       (-0.498115     0.498127)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          44.93 using 59 PHA bins.
# Reduced chi-squared =         0.7882 for     57 degrees of freedom 
# Null hypothesis probability =   8.766062e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.409e-09   3.777e-09
25- 50  1.233e-08   7.125e-09
50-150  2.704e-08   1.569e-08
15-150  4.578e-08   2.627e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.21875        (-2.99293      4.28858)
R1^2/D10^2  : 0.966324        (-0.79468      14.0178)
kT2 [keV]   : 29.9785        (-10.9008      75.9821)
R2^2/D10^2  : 6.31363E-03    (-0.00595628   0.00885716)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.11 using 59 PHA bins.
# Reduced chi-squared =         0.7838 for     55 degrees of freedom 
# Null hypothesis probability =   8.775274e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.106e-09   3.630e-09
25- 50  1.110e-08   5.765e-09
50-150  3.537e-08   2.051e-08
15-150  5.258e-08   2.798e-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: 1.85831     ( -0.285616   0.306852 )
Norm@50keV  : 5.51912E-04    ( -0.000112058   0.000108314 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.05 using 59 PHA bins.
# Reduced chi-squared =         0.9657 for     57 degrees of freedom 
# Null hypothesis probability =   5.487319e-01
 
Photon flux (15-150 keV)    in 105.7 sec: 7.78402E-02 ( -0.0120858  0.0120866 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.36348e-07 ( -1.05411e-07  1.09957e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.64121     ( -1.51246   0.729403 )
Epeak [keV] : 65.7498      (   )
Norm@50keV  : 7.45665E-04    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.94 using 59 PHA bins.
# Reduced chi-squared =         0.9810 for     56 degrees of freedom 
# Null hypothesis probability =   5.151633e-01
 
Photon flux (15-150 keV)    in 105.7 sec: 7.71855E-02 ( -0.0125396  0.0124575 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.20044e-07 ( -1.33239e-07  1.23083e-07 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.92462   ( -4.92462   -4.92462 )
beta        : -2.06919    ( -0.539191   0.364565 )
Epeak [keV] : 23.4736      ( -23.4736 4.95799 )
Norm@50keV   : 110.301    ( -16.9679   554680 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.08 using 59 PHA bins.
# Reduced chi-squared =         0.9651 for     55 degrees of freedom 
# Null hypothesis probability =   5.483043e-01
 
Photon flux (15-150 keV)    in 105.7 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

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

S(25-50 keV)  = 3.62e-07
S(50-100 keV) = 4.57e-07

T90 vs. Hardness ratio plot

T90                                   = 228.719999998808 sec.
Hardness ratio (energy fluence ratio) = 1.26243

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.07623
Count Ratio (50-100 keV) / (15-25 keV) = 0.781596

Mask shadow pattern

IMX = -0.125029431464, IMY = 0.335269144104

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 -33.576000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
326.2388  38.4340    4.2  35.4  -85.8   1.0555   2.7    7.4	Cyg X-2

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

Time interval of the image:
-33.576000 72.100600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
325.9538  38.2425    5.4  35.6  -86.2   0.5342   2.1   11.3	Cyg X-2                       
 24.4037 -13.7694    2.4  40.8  110.2   2.2355   4.8 ------	UNKNOWN                       
 27.6795  13.2835    2.4  25.9   67.0   0.7257   4.9 ------	UNKNOWN                       
340.5842  23.7503    1.9  19.7 -110.3   0.7807   6.0 ------	UNKNOWN                       
318.4746  -9.8984    2.2  52.0 -155.8   1.6733   5.2 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
119.500600 963.050000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
299.5965  35.2050    0.4  37.2  -71.3  32.1518  31.4    0.4	Cyg X-1                       
308.0194  40.9181    2.5  32.2  -58.7   2.9377   4.7    4.6	Cyg X-3                       
326.0053  38.2762    2.8  19.2  -46.0   1.6287   4.1    8.3	Cyg X-2                       
356.2876 -24.3704    3.1  50.4  152.6   6.8521   3.7 ------	UNKNOWN                       
  5.0967  64.7180    2.6  44.0    5.9   3.1157   4.5 ------	UNKNOWN                       
353.0136  52.7670    2.9  30.5    5.9   1.6528   4.0 ------	UNKNOWN                       
308.0467  37.6466    1.4  31.1  -64.6   5.3379   8.1 ------	UNKNOWN                       
298.6015  32.1746    3.3  37.8  -76.4   3.9616   3.5 ------	UNKNOWN                       
299.0447   5.6078    2.4  43.9 -116.5   8.7426   4.9 ------	UNKNOWN

Plot creation:
Thu Oct  8 20:33:07 EDT 2015