batgrbproduct analysis for trigger=572721

batgrbproduct Analysis for Trigger=572721

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): Sat Jan 11 22:56:47 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger572721
======================================================================

  Trigger: 00572721      Segment: 000

  BAT Trigger Time: 402389672.384   [s; MET]
      Trigger Stop: 402389672.64   [s; MET]
               UTC: 2013-10-02T06:54:21.282820    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 253.275042794748   Dec: 82.0571667841111  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.73
     Image Trigger?:     NO
     Rate S/N Ratio:     15.7162336455017  [ if not an image trigger ]
     Image S/N Ratio:    8.73

  Flight Position:   [ source = BAT ]
    RA: 253.275042794748   Dec: 82.0571667841111  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 253.275   Dec: 82.0572  [deg; J2000]
        { 16h 53m 06.0s , +82d 03' 25.9" }
        +/- 2.16089423164 [arcmin] (estimated 90% radius based on SNR)
    SNR: 10.1187607151
 
 
  Angular difference between Flight and Ground position is 0.002024 arcmin
 
  Partial Coding Fraction: 0.71875    [ including projection effects ]

  Duration
     T90: 56.5279999375343 +/- 4.10830962682656
        Measured from: 0.11599999666214
                   to: 56.6439999341965     [s; relative to TRIGTIME]
     T50: 4.68799996376038 +/- 32.1173271437912
        Measured from: 42.6999999880791
                   to: 47.3879999518394     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 43.1719999909401     
                   to: 44.1719999909401     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.203999996185303     
                   to: 60.727999985218     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.294550   0.373123   0.283518   0.023621
           0.039117   0.040786   0.035990   0.031914 [error]
 Peak      0.035791   0.061399   0.050256   0.013092
           0.005326   0.005795   0.005218   0.004086 [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 8.55e-08 1.46e-07 1.91e-07 5.05e-07 5.60e-07 9.27e-07   erg/cm2
              Error 1.53e-08 1.76e-08 3.35e-08 1.79e-07 8.03e-08 2.12e-07   erg/cm2
Peak flux Power-law 3.20e-01 3.84e-01 3.33e-01 4.95e-01 1.21e+00 1.53e+00   ph/cm2/s
              Error 6.15e-02 4.52e-02 4.04e-02 1.26e-01 1.27e-01 1.69e-01   ph/cm2/s
 
Fluence   Cutoff-PL 7.51e-08 1.66e-07 1.94e-07 1.18e-07 5.11e-07 5.52e-07   erg/cm2
              Error 1.78e-08 2.36e-08 3.90e-08 1.73e-07 8.47e-08 1.74e-07   erg/cm2
Peak flux Cutoff-PL 3.14e-01 3.87e-01 3.37e-01 4.41e-01 1.21e+00 1.48e+00   ph/cm2/s
              Error 6.76e-02 5.02e-02 4.50e-02 1.81e-01 1.29e-01 2.39e-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    1.616    0.203    -      -           1.00e-03 1.32e-04   56.140 57
CPL   0.538    0.936      61.9   36.0      3.85e-03 6.73e-03   51.180 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.204    0.177    -      -           1.03e-02 1.06e-03   52.190 57
CPL   1.111    0.473     499.9    0.0      1.15e-02 1.23e-02   52.130 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: 48.896000 sec.
T50 in the 50-300 keV band: 14.528000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   60.932   -0.204   60.728
T90    56.528    0.116   56.644
T50     4.688   42.700   47.388
Peak    1.000   43.172   44.172

Click here for the BAT GCN circular template

Special notes of this burst

Image

Pre-slew 25.0-100.0 keV image (Event data)

#RAcent DECcent POSerr Theta  Phi  Peak_Cts  SNR Name
253.275 82.057 0.000 24.101 141.952 0.048 10.119 TRIG_00572721
 
Image time interval: 0.000 to 0.256 [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)

The mask-weighted light curves based on cleaned DPHs

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

Multiple GTIs in the spectrum
tstart tstop
-0.204000 41.637100
42.616000 60.728000
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.61615     ( -0.199789   0.206233 )
Norm@50keV  : 1.00125E-03    ( -0.000133397   0.000131501 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.14 using 59 PHA bins.
# Reduced chi-squared =         0.9849 for     57 degrees of freedom 
# Null hypothesis probability =   5.074476e-01
 
Photon flux (15-150 keV)    in 59.95 sec: 0.129318 ( -0.0155042  0.0155065 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.60294e-07 ( -7.95009e-08  8.11699e-08 ) ergs/cm2

Cutoff power-law model

Multiple GTIs in the spectrum
tstart tstop
-0.204000 41.637100
42.616000 60.728000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.538115     ( -1.0274   0.845275 )
Epeak [keV] : 61.8659      ( -13.4341 58.5402 )
Norm@50keV  : 3.84863E-03    ( -0.00384861   0.00961201 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.18 using 59 PHA bins.
# Reduced chi-squared =         0.9139 for     56 degrees of freedom 
# Null hypothesis probability =   6.575712e-01
 
Photon flux (15-150 keV)    in 59.95 sec: 0.124524 ( -0.015863  0.015894 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.11127e-07 ( -8.19517e-08  8.74784e-08 ) ergs/cm2

Band function

Multiple GTIs in the spectrum
tstart tstop
-0.204000 41.637100
42.616000 60.728000
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.537422   ( -0.672494   1.04471 )
beta        : -10.0000    ( 10   5.32907e-15 )
Epeak [keV] : 61.8388      ( -12.8893 58.5584 )
Norm@50keV   : 3.85233E-03    ( -0.00385232   0.00960805 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.18 using 59 PHA bins.
# Reduced chi-squared =         0.9305 for     55 degrees of freedom 
# Null hypothesis probability =   6.213952e-01
 
Photon flux (15-150 keV)    in 59.95 sec: 0.125107 (    ) 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]    : 13.3252  (-1.76484  2.02288)
R^2/D10^2   : 2.25933E-02  (-0.0089669   0.014886)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.78 using 59 PHA bins.
# Reduced chi-squared =          1.049 for     57 degrees of freedom 
# Null hypothesis probability =   3.751526e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.097e-08   1.113e-08
25- 50  1.802e-07   3.138e-08
50-150  2.052e-07   5.395e-08
15-150  4.364e-07   7.605e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 147.570       (-59.809      -145.603)
Norm        : 0.536988       (-0.0690756     0.0865012)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.23 using 59 PHA bins.
# Reduced chi-squared =         0.9338 for     57 degrees of freedom 
# Null hypothesis probability =   6.174558e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.280e-08   4.496e-08
25- 50  1.531e-07   8.176e-08
50-150  3.002e-07   1.794e-07
15-150  5.360e-07   2.935e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.20774        (-1.84901      2.64418)
R1^2/D10^2  : 0.312726        (-0.237082      1.5422)
kT2 [keV]   : 17.5958        (-3.35621      5.69244)
R2^2/D10^2  : 6.99696E-03    (-0.00477931   0.00902309)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.20 using 59 PHA bins.
# Reduced chi-squared =         0.8946 for     55 degrees of freedom 
# Null hypothesis probability =   6.947929e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.970e-08   4.163e-08
25- 50  1.576e-07   7.940e-08
50-150  2.678e-07   1.559e-07
15-150  5.051e-07   2.635e-07

Peak spectrum fit

Power-law model

Time interval is from   43.172 sec. to   44.172 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.20427     ( -0.178515   0.17605 )
Norm@50keV  : 1.03117E-02    ( -0.00105908   0.00105854 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.19 using 59 PHA bins.
# Reduced chi-squared =         0.9156 for     57 degrees of freedom 
# Null hypothesis probability =   6.557237e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.21112 ( -0.126568  0.126691 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.04491e-07 ( -1.20695e-08  1.21671e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   43.172 sec. to   44.172 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.11139     ( -0.690849   0.255029 )
Epeak [keV] : 499.943      ( -499.998 -499.998 )
Norm@50keV  : 1.14625E-02    ( -0.0114623   0.0130912 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.13 using 59 PHA bins.
# Reduced chi-squared =         0.9308 for     56 degrees of freedom 
# Null hypothesis probability =   6.222384e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.20733 ( -0.12896  0.12865 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.03886e-07 ( -1.30261e-08  1.2641e-08 ) ergs/cm2

Band function

Time interval is from   43.172 sec. to   44.172 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 0.683394   ( -0.0104779   -0.0104779 )
beta        : -1.36487    ( 1.32593   0.242996 )
Epeak [keV] : 47.0517      ( -46.8269 193.953 )
Norm@50keV   : 0.166150    ( -0.178868   176.123 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.52 using 59 PHA bins.
# Reduced chi-squared =         0.9186 for     55 degrees of freedom 
# Null hypothesis probability =   6.462244e-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]    : 17.7360  (-2.60358  3.19045)
R^2/D10^2   : 8.18441E-02  (-0.0343131   0.0571436)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          76.27 using 59 PHA bins.
# Reduced chi-squared =          1.338 for     57 degrees of freedom 
# Null hypothesis probability =   4.507489e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.179e-09   1.195e-09
25- 50  2.368e-08   3.460e-09
50-150  5.387e-08   1.002e-08
15-150  8.273e-08   1.164e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-29.4576      -200)
Norm        : 4.96363       (-0.519336     0.519336)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.20 using 59 PHA bins.
# Reduced chi-squared =          1.091 for     57 degrees of freedom 
# Null hypothesis probability =   2.963000e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.236e-08   6.835e-09
25- 50  2.377e-08   1.293e-08
50-150  5.214e-08   2.847e-08
15-150  8.827e-08   4.774e-08

Double BB

------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 9.03153        (-2.32197      2.7867)
R1^2/D10^2  : 0.534969        (-0.277171      0.644044)
kT2 [keV]   : 43.8821        (-15.3245      86.0597)
R2^2/D10^2  : 3.78411E-03    (-0.00325446   0.0101175)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.22 using 59 PHA bins.
#Fit statistic : Chi-Squared =          48.56 using 59 PHA bins.
# Reduced chi-squared =         0.8949 for     55 degrees of freedom 
# Reduced chi-squared =         0.8829 for     55 degrees of freedom 
# Null hypothesis probability =   6.941118e-01
# Null hypothesis probability =   7.175805e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.354e-09   5.129e-09
25- 50  2.348e-08   1.212e-08
50-150  6.755e-08   3.850e-08
15-150  1.004e-07   5.430e-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: 1.69107     ( -0.668538   0.737598 )
Norm@50keV  : 9.23091E-04    ( -0.000392086   0.000358224 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.39 using 59 PHA bins.
# Reduced chi-squared =         0.9016 for     57 degrees of freedom 
# Null hypothesis probability =   6.845536e-01
 
Photon flux (15-150 keV)    in 10.52 sec: 0.122217 ( -0.0417664  0.0417811 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.99765e-08 ( -3.71093e-08  3.97284e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.69386     ( -0.674971   0.736218 )
Epeak [keV] : 9999.34      ( -9999.35 -9999.36 )
Norm@50keV  : 9.23338E-04    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.39 using 59 PHA bins.
# Reduced chi-squared =         0.9177 for     56 degrees of freedom 
# Null hypothesis probability =   6.496236e-01
 
Photon flux (15-150 keV)    in 10.52 sec: 0.122249 ( -0.0417828  0.041746 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.01997e-08 ( -4.00117e-08  3.8523e-08 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.95843   ( -4.95843   -4.95843 )
beta        : -1.85900    ( -1.63707   0.784555 )
Epeak [keV] : 24.2338      ( -24.2338 56.8216 )
Norm@50keV   : 136.154    ( -46.323   1.44561e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.23 using 59 PHA bins.
# Reduced chi-squared =         0.9315 for     55 degrees of freedom 
# Null hypothesis probability =   6.193622e-01
 
Photon flux (15-150 keV)    in 10.52 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)  = 1.46e-07
S(50-100 keV) = 1.91e-07

T90 vs. Hardness ratio plot

T90                                   = 56.5279999375343 sec.
Hardness ratio (energy fluence ratio) = 1.30822

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.26676
Count Ratio (50-100 keV) / (15-25 keV) = 0.962546

Mask shadow pattern

IMX = -0.352277607787, IMY = -0.275704590254

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:
-153.683400 -0.204000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
331.5494  68.6092    3.0  42.3  121.4   1.8547   3.9 ------	UNKNOWN                       
 87.8046  64.4268    2.6  23.5   51.5   0.6020   4.4 ------	UNKNOWN

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

Time interval of the image:
-0.204000 10.316670
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
128.2438  17.3262    2.5  53.3  -32.2   0.5482   4.7 ------	UNKNOWN                       
208.1041  32.8480    2.1  48.6 -131.0   0.7686   5.7 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
55.716600 962.719100
1772.616000 1904.237400
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.2192  35.4311    0.0  46.6 -155.4  -2.0351  -1.7   12.8	Her X-1                       
299.6612  35.2066    3.4  49.6  154.6   7.0009   3.4    3.5	Cyg X-1                       
308.0667  40.9703    2.2  44.8  144.5   8.2765   5.2    2.2	Cyg X-3                       
149.9858  41.4961    4.5  50.8  -44.6   7.7601   2.6 ------	UNKNOWN                       
203.5771  44.0882    4.0  41.1  -98.0  10.2563   2.9 ------	UNKNOWN

Plot creation:
Thu Oct  8 20:14:09 EDT 2015