batgrbproduct analysis for trigger=224552

batgrbproduct Analysis for Trigger=224552

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): Wed Jan 22 14:16:03 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger224552
======================================================================

  Trigger: 00224552      Segment: 000

  BAT Trigger Time: 177289340.416   [s; MET]
      Trigger Stop: 177289341.44   [s; MET]
               UTC: 2006-08-14T23:02:19.035400    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 221.347997937736   Dec: 20.5828671043413  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    15.61
     Image Trigger?:     NO
     Rate S/N Ratio:     32.5883414736007  [ if not an image trigger ]
     Image S/N Ratio:    15.61

  Flight Position:   [ source = BAT ]
    RA: 221.347997937736   Dec: 20.5828671043413  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 221.340465227881   Dec: 20.5870452383846  [deg; J2000]  
        { 14h 45m 21.7s , +20d 35' 13.4" }
         +/- 0.744990137735512 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.183189055929691 [arcmin] (formal 1-sigma fit error)
    SNR: 46.3191402012991
 
  Angular difference between Flight and Ground position is 0.491796 arcmin
 
  Partial Coding Fraction: 0.6484375    [ including projection effects ]

  Duration
     T90: 145.071999996901 +/- 4.81903061513483
        Measured from: 0.983999997377396
                   to: 146.055999994278     [s; relative to TRIGTIME]
     T50: 61.660000026226 +/- 0.676272118505318
        Measured from: 14.7239999771118
                   to: 76.3840000033379     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 15.4039999842644     
                   to: 16.4039999842644     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -11.688000023365     
                   to: 218.324000000954     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     6.545102   8.852082   6.834466   1.654746
           0.081918   0.084270   0.075092   0.061452 [error]
 Peak      0.212863   0.306908   0.286852   0.087124
           0.008694   0.010318   0.010002   0.007504 [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-06 3.70e-06 5.14e-06 1.49e-05 1.48e-05 2.57e-05   erg/cm2
              Error 7.30e-08 7.55e-08 9.17e-08 6.38e-07 2.34e-07 6.62e-07   erg/cm2
Peak flux Power-law 2.08e+00 2.36e+00 1.92e+00 2.60e+00 7.31e+00 8.96e+00   ph/cm2/s
              Error 1.49e-01 1.01e-01 8.32e-02 2.42e-01 2.78e-01 3.38e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.98e-06 3.71e-06 5.20e-06 1.30e-05 1.47e-05 2.39e-05   erg/cm2
              Error 1.02e-07 7.70e-08 1.10e-07 1.86e-06 2.58e-07 1.53e-06   erg/cm2
Peak flux Cutoff-PL 1.97e+00 2.39e+00 1.96e+00 2.05e+00 7.23e+00 8.38e+00   ph/cm2/s
              Error 1.89e-01 1.09e-01 9.87e-02 4.77e-01 2.93e-01 5.20e-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    1.528    0.031    -      -           6.80e-03 1.09e-04   43.510 57
CPL   1.412    0.118     302.4  -87.6      7.61e-03 8.31e-04   41.060 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.301    0.066    -      -           6.13e-02 2.24e-03   43.600 57
CPL   1.075    0.256     225.7  -66.4      7.80e-02 2.10e-02   41.250 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: 141.504000 sec.
T50 in the 50-300 keV band: 61.440000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  230.012  -11.688  218.324
T90   145.072    0.984  146.056
T50    61.660   14.724   76.384
Peak    1.000   15.404   16.404

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
  221.3405    20.5870   0.0041    28.1420    28.4750         4.9250510     46.319 TRIG_00224552                 
 
Foreground time interval of the image:
-11.688  11.885 (delta_t =  23.573 [sec])
Background time interval of the image:
-26.315 -11.688 (delta_t =  14.627 [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

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000

8 ms binning

From T100_start-3 s to T100_start+3 s

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000

2 ms binning

From T100_start-1 s to T100_start+1 s

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000

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  -11.688 sec. to  218.324 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.52756     ( -0.0310533   0.031012 )
Norm@50keV  : 6.80189E-03    ( -0.000108565   0.000108476 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.51 using 59 PHA bins.
# Reduced chi-squared =         0.7633 for     57 degrees of freedom 
# Null hypothesis probability =   9.058697e-01
 
Photon flux (15-150 keV)    in 230 sec: 0.855592 ( -0.0166371  0.0167104 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.47766e-05 ( -2.33503e-07  2.33526e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -11.688 sec. to  218.324 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.41242     ( -0.128235   0.1068 )
Epeak [keV] : 302.372      ( -127.182 -302.372 )
Norm@50keV  : 7.60564E-03    ( -0.000679777   0.000982045 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          41.06 using 59 PHA bins.
# Reduced chi-squared =         0.7332 for     56 degrees of freedom 
# Null hypothesis probability =   9.327810e-01
 
Photon flux (15-150 keV)    in 230 sec: 0.845734 ( -0.019407  0.019464 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.46817e-05 ( -2.58336e-07  2.57531e-07 ) ergs/cm2

Band function

Time interval is from  -11.688 sec. to  218.324 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.39221   ( 1.01185   5.86568 )
beta        : -1.61730    ( 1.61707   0.103961 )
Epeak [keV] : 256.453      ( -256.417 -256.417 )
Norm@50keV   : 7.78235E-03    ( -0.000754222   0.472962 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          40.92 using 59 PHA bins.
# Reduced chi-squared =         0.7440 for     55 degrees of freedom 
# Null hypothesis probability =   9.211436e-01
 
Photon flux (15-150 keV)    in 230 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]    : 18.3163  (  )
R^2/D10^2   : 4.53810E-02  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         836.16 using 59 PHA bins.
# Reduced chi-squared =         14.669 for     57 degrees of freedom 
# Null hypothesis probability =  6.113017e-139
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.971e-07   2.518e-08
25- 50  3.266e-06   8.050e-08
50-150  7.988e-06   2.139e-07
15-150  1.195e-05   2.116e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (      )
Norm        : 3.50477       (-0.0550721     0.0550686)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          69.67 using 59 PHA bins.
# Reduced chi-squared =          1.222 for     57 degrees of freedom 
# Null hypothesis probability =   1.209282e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.008e-06   3.933e-08
25- 50  3.863e-06   7.590e-08
50-150  8.471e-06   1.679e-07
15-150  1.434e-05   2.703e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.70829        (-0.499936      0.531871)
R1^2/D10^2  : 0.608616        (-0.126242      0.167252)
kT2 [keV]   : 29.0698        (-1.64388      1.96659)
R2^2/D10^2  : 7.39917E-03    (-0.00155593   0.00176334)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.19 using 59 PHA bins.
# Reduced chi-squared =          1.131 for     55 degrees of freedom 
# Null hypothesis probability =   2.354086e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.690e-06   1.165e-07
25- 50  3.791e-06   1.184e-07
50-150  8.987e-06   2.714e-07
15-150  1.447e-05   3.542e-07

Peak spectrum fit

Power-law model

Time interval is from   15.404 sec. to   16.404 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.30068     ( -0.0658209   0.0658576 )
Norm@50keV  : 6.12833E-02    ( -0.00223843   0.0022382 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.60 using 59 PHA bins.
# Reduced chi-squared =         0.7649 for     57 degrees of freedom 
# Null hypothesis probability =   9.042385e-01
 
Photon flux (15-150 keV)    in 1 sec: 7.31217 ( -0.277855  0.278194 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.05491e-07 ( -2.4472e-08  2.45345e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   15.404 sec. to   16.404 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.07477     ( -0.2667   0.245616 )
Epeak [keV] : 225.672      ( -92.8737 -225.672 )
Norm@50keV  : 7.79795E-02    ( -0.0171595   0.0248138 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          41.25 using 59 PHA bins.
# Reduced chi-squared =         0.7367 for     56 degrees of freedom 
# Null hypothesis probability =   9.297962e-01
 
Photon flux (15-150 keV)    in 1 sec: 7.22572 ( -0.29294  0.29323 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.98007e-07 ( -2.6249e-08  2.6117e-08 ) ergs/cm2

Band function

Time interval is from   15.404 sec. to   16.404 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.07452   ( 1.02444   0.87896 )
beta        : -2.95476    ( 2.85123   12.7703 )
Epeak [keV] : 225.599      ( -53.0205 -225.599 )
Norm@50keV   : 7.79870E-02    ( -0.00928072   0.0235049 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          41.25 using 59 PHA bins.
# Reduced chi-squared =         0.7501 for     55 degrees of freedom 
# Null hypothesis probability =   9.153037e-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]    : 18.1375  (  )
R^2/D10^2   : 0.449824  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         184.93 using 59 PHA bins.
# Reduced chi-squared =         3.2443 for     57 degrees of freedom 
# Null hypothesis probability =   1.994529e-15
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.955e-08   2.175e-09
25- 50  1.375e-07   7.000e-09
50-150  3.289e-07   2.100e-08
15-150  4.959e-07   2.170e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (      )
Norm        : 30.3969       (-1.12135     1.1211)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          85.44 using 59 PHA bins.
# Reduced chi-squared =          1.499 for     57 degrees of freedom 
# Null hypothesis probability =   8.715548e-03
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.568e-08   2.925e-09
25- 50  1.456e-07   5.550e-09
50-150  3.193e-07   1.240e-08
15-150  5.406e-07   2.160e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.24872        (-1.17353      1.40559)
R1^2/D10^2  : 5.53550        (-2.33761      4.63741)
kT2 [keV]   : 28.5458        (-3.34405      5.10391)
R2^2/D10^2  : 8.32006E-02    (-0.0359436   0.0460281)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          46.53 using 59 PHA bins.
# Reduced chi-squared =         0.8460 for     55 degrees of freedom 
# Null hypothesis probability =   7.848103e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.931e-08   9.150e-09
25- 50  1.369e-07   1.380e-08
50-150  4.001e-07   4.235e-08
15-150  5.963e-07   5.260e-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: 1.30002     ( -0.0452227   0.0450959 )
Norm@50keV  : 1.42829E-02    ( -0.000346671   0.00034654 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          46.24 using 59 PHA bins.
# Reduced chi-squared =         0.8112 for     57 degrees of freedom 
# Null hypothesis probability =   8.451437e-01
 
Photon flux (15-150 keV)    in 23.57 sec: 1.70399 ( -0.0452602  0.0453716 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.32667e-06 ( -8.44329e-08  8.45246e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.07315     ( -0.189367   0.181618 )
Epeak [keV] : 234.454      ( -80.4176 612.195 )
Norm@50keV  : 1.79766E-02    ( -0.00295669   0.00369165 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          41.67 using 59 PHA bins.
# Reduced chi-squared =         0.7441 for     56 degrees of freedom 
# Null hypothesis probability =   9.230513e-01
 
Photon flux (15-150 keV)    in 23.57 sec: 1.67795 ( -0.04931  0.04948 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.28639e-06 ( -9.14987e-08  9.11452e-08 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.776205   ( -0.400356   1.18079 )
beta        : -1.40848    ( 1.40921   0.0989613 )
Epeak [keV] : 107.023      ( -73.5523 228.269 )
Norm@50keV   : 2.64882E-02    ( -0.0098686   0.0667005 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          39.77 using 59 PHA bins.
# Reduced chi-squared =         0.7231 for     55 degrees of freedom 
# Null hypothesis probability =   9.391618e-01
 
Photon flux (15-150 keV)    in 23.57 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)  = 3.70e-06
S(50-100 keV) = 5.14e-06

T90 vs. Hardness ratio plot

T90                                   = 145.071999996901 sec.
Hardness ratio (energy fluence ratio) = 1.38919

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.35247
Count Ratio (50-100 keV) / (15-25 keV) = 1.04421

Mask shadow pattern

IMX = 4.701831000939438E-01, IMY = -2.550234748945609E-01

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000

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:
-26.315400 -11.688000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']

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

Time interval of the image:
-11.688000 11.884600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
221.3405  20.5870    0.2  28.1   28.5   4.9251  46.3 ------	UNKNOWN                       
203.7720 -32.2578    2.4  30.7  171.2   0.4440   4.9 ------	UNKNOWN                       
203.7082  14.5350    2.8  16.1   -8.4   0.3186   4.2 ------	UNKNOWN                       
174.8143 -53.8337    2.4  57.4 -168.8   1.8129   4.9 ------	UNKNOWN                       
173.2184 -48.6358    2.5  53.8 -164.1   0.9718   4.5 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
60.484590 962.638000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
244.9909 -15.6362    0.4  43.0  136.4  52.8910  25.6    0.7	Sco X-1                       
254.4723  35.3311    0.8  32.5   46.8  12.3778  14.4    1.0	Her X-1                       
221.3470  20.5907    0.5   0.0 -132.0  11.6360  22.1 ------	UNKNOWN                       
188.7086   8.6964    3.1  33.7 -115.0   2.8331   3.6 ------	UNKNOWN                       
180.1127   0.8874    3.1  44.8 -119.9  10.1669   3.7 ------	UNKNOWN                       
176.9412  25.5447    3.7  41.0  -83.5   8.6325   3.1 ------	UNKNOWN

Plot creation:
Sun May 31 12:17:54 EDT 2015