batgrbproduct analysis for trigger=202035

batgrbproduct Analysis for Trigger=202035

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 18:02:19 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger202035
======================================================================

  Trigger: 00202035      Segment: 000

  BAT Trigger Time: 164422544   [s; MET]
      Trigger Stop: 164422616   [s; MET]
               UTC: 2006-03-19T00:55:42.920580    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 176.369724300677   Dec: 59.9902443826169  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9.87
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    9.87

  Flight Position:   [ source = BAT ]
    RA: 176.369724300677   Dec: 59.9902443826169  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 176.374887424348   Dec: 60.0251546863785  [deg; J2000]  
        { 11h 45m 30.0s , +60d 01' 30.6" }
         +/- 2.15924745255679 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.806499145514275 [arcmin] (formal 1-sigma fit error)
    SNR: 10.1284619320415
 
  Angular difference between Flight and Ground position is 2.100335 arcmin
 
  Partial Coding Fraction: 1    [ including projection effects ]

  Duration
     T90: 10.2880000174046 +/- 1.71882867133073
        Measured from: 2.53999999165535
                   to: 12.8280000090599     [s; relative to TRIGTIME]
     T50: 4.53200000524521 +/- 1.39278858002169
        Measured from: 4.43599998950958
                   to: 8.96799999475479     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 4.05599999427795     
                   to: 5.05599999427795     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0.967999994754791     
                   to: 13.3959999978542     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.262552   0.208953   0.090808   0.043509
           0.018214   0.018691   0.016549   0.014683 [error]
 Peak      0.056162   0.048330   0.022607   0.006912
           0.005744   0.005936   0.005077   0.004257 [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 7.35e-08 8.51e-08 7.09e-08 9.93e-08 2.65e-07 3.29e-07   erg/cm2
              Error 9.75e-09 8.79e-09 1.51e-08 4.13e-08 3.31e-08 5.93e-08   erg/cm2
Peak flux Power-law 5.12e-01 3.52e-01 1.58e-01 9.91e-02 1.07e+00 1.12e+00   ph/cm2/s
              Error 8.77e-02 4.61e-02 3.95e-02 4.61e-02 1.35e-01 1.45e-01   ph/cm2/s
 
Fluence   Cutoff-PL 7.37e-08 8.51e-08 7.05e-08 9.73e-08 2.65e-07 3.27e-07   erg/cm2
              Error 9.76e-09 8.95e-09 -------- -------- 3.38e-08 7.17e-08   erg/cm2
Peak flux Cutoff-PL 5.05e-01 3.61e-01 1.55e-01 6.72e-02 1.06e+00 1.09e+00   ph/cm2/s
              Error 9.29e-02 5.96e-02 4.60e-02 7.48e-02 1.40e-01 1.66e-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    2.265    0.221    -      -           2.25e-03 3.40e-04   41.490 57
CPL   2.524    0.000     193.6    0.0      1.64e-03 7.99e-04   40.580 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.151    0.263    -      -           6.63e-03 1.24e-03   48.990 57
CPL   1.940    0.704      10.8    0.0      8.94e-03 0.00e+00   48.850 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: 4.864000 sec.
T50 in the 50-300 keV band: 2.560000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   12.428    0.968   13.396
T90    10.288    2.540   12.828
T50     4.532    4.436    8.968
Peak    1.000    4.056    5.056

Click here for the BAT GCN circular template

Special notes of this burst

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  176.3749    60.0252   0.0189    10.7943   143.2141         0.7468199     10.128 TRIG_00202035                 
 
Foreground time interval of the image:
  0.968  13.396 (delta_t =  12.428 [sec])
Background time interval of the image:
 -2.299   0.968 (delta_t =   3.267 [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 72.000000

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 72.000000

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 72.000000

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    0.968 sec. to   13.396 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.26475     ( -0.213572   0.229038 )
Norm@50keV  : 2.24781E-03    ( -0.000344437   0.000336494 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          41.49 using 59 PHA bins.
# Reduced chi-squared =         0.7279 for     57 degrees of freedom 
# Null hypothesis probability =   9.389792e-01
 
Photon flux (15-150 keV)    in 12.43 sec: 0.385268 ( -0.0367529  0.0367544 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.65344e-07 ( -3.25411e-08  3.36894e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.968 sec. to   13.396 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.52402     ( -1.9901   -1.9901 )
Epeak [keV] : 193.586      (   )
Norm@50keV  : 1.64388E-03    ( -0.000722123   0.000875854 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          40.58 using 59 PHA bins.
# Reduced chi-squared =         0.7246 for     56 degrees of freedom 
# Null hypothesis probability =   9.397749e-01
 
Photon flux (15-150 keV)    in 12.43 sec: 0.385105 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.64723e-07 ( -3.33795e-08  3.4277e-08 ) ergs/cm2

Band function

Time interval is from    0.968 sec. to   13.396 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.56784   ( 1.56783   1.56783 )
beta        : -2.27388    ( 2.27382   0.221482 )
Epeak [keV] : 12.2575      ( -12.2586 184.426 )
Norm@50keV   : 8.67196E-03    ( -0.00867154   1.27717e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          41.46 using 59 PHA bins.
# Reduced chi-squared =         0.7538 for     55 degrees of freedom 
# Null hypothesis probability =   9.115339e-01
 
Photon flux (15-150 keV)    in 12.43 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]    : 7.74267  (-0.936555  1.05986)
R^2/D10^2   : 0.456033  (-0.184083   0.317742)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          71.12 using 59 PHA bins.
# Reduced chi-squared =          1.248 for     57 degrees of freedom 
# Null hypothesis probability =   9.884390e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.991e-08   1.049e-08
25- 50  9.899e-08   1.391e-08
50-150  2.331e-08   8.086e-09
15-150  1.822e-07   2.461e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 42.9582       (-11.2898      17.9685)
Norm        : 2.33290       (-0.43727     0.605253)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.11 using 59 PHA bins.
# Reduced chi-squared =         0.8265 for     57 degrees of freedom 
# Null hypothesis probability =   8.219446e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.812e-08   8.931e-09
25- 50  9.234e-08   1.124e-08
50-150  7.710e-08   2.500e-08
15-150  2.375e-07   3.611e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 4.78616        (-1.48109      1.6059)
R1^2/D10^2  : 2.68709        (-1.77075      4.50222)
kT2 [keV]   : 19.7180        (-7.86745      22.0072)
R2^2/D10^2  : 8.26145E-03    (-0.00670517   0.0204186)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          44.46 using 59 PHA bins.
# Reduced chi-squared =         0.8083 for     55 degrees of freedom 
# Null hypothesis probability =   8.444850e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.571e-08   2.896e-08
25- 50  7.798e-08   2.528e-08
50-150  1.111e-07   6.472e-08
15-150  2.648e-07   9.889e-08

Peak spectrum fit

Power-law model

Time interval is from    4.056 sec. to    5.056 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.15066     ( -0.251542   0.275101 )
Norm@50keV  : 6.63063E-03    ( -0.00125579   0.0012217 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.99 using 59 PHA bins.
# Reduced chi-squared =         0.8594 for     57 degrees of freedom 
# Null hypothesis probability =   7.659920e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.07003 ( -0.13517  0.135178 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.19434e-08 ( -1.00246e-08  1.0424e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    4.056 sec. to    5.056 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.94020     ( -1.30202   0.105852 )
Epeak [keV] : 10.7703      (   )
Norm@50keV  : 8.94358E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.85 using 59 PHA bins.
# Reduced chi-squared =         0.8724 for     56 degrees of freedom 
# Null hypothesis probability =   7.397861e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.06121 ( -0.140577  0.14015 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.01484e-08 ( -1.23598e-08  1.18947e-08 ) ergs/cm2

Band function

Time interval is from    4.056 sec. to    5.056 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 5.86952E-02   ( 1.09097   1.09097 )
beta        : -2.29500    ( 2.32135   0.390442 )
Epeak [keV] : 23.4398      ( -25.0288 17.4851 )
Norm@50keV   : 0.298918    ( -0.299262   1804.49 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.30 using 59 PHA bins.
# Reduced chi-squared =         0.8782 for     55 degrees of freedom 
# Null hypothesis probability =   7.266048e-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]    : 8.03218  (-1.17044  1.39232)
R^2/D10^2   : 1.14353  (-0.535449   1.00023)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.59 using 59 PHA bins.
# Reduced chi-squared =          1.063 for     57 degrees of freedom 
# Null hypothesis probability =   3.477565e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.338e-08   2.983e-09
25- 50  2.358e-08   4.740e-09
50-150  6.274e-09   2.634e-09
15-150  4.324e-08   7.785e-09

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 48.5788       (-15.3575      27.6789)
Norm        : 6.14295       (-1.30165     1.83942)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.57 using 59 PHA bins.
# Reduced chi-squared =         0.8696 for     57 degrees of freedom 
# Null hypothesis probability =   7.471814e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.492e-08   2.345e-09
25- 50  2.120e-08   3.615e-09
50-150  2.003e-08   8.336e-09
15-150  5.615e-08   1.031e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 4.94025        (-2.08425      2.14924)
R1^2/D10^2  : 5.48806        (-2.39983      11.9089)
kT2 [keV]   : 15.9710        (-8.45285      51.1428)
R2^2/D10^2  : 4.76220E-02    (-0.0183358   0.152309)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.48 using 59 PHA bins.
# Reduced chi-squared =         0.8996 for     55 degrees of freedom 
# Null hypothesis probability =   6.847284e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.523e-08   8.565e-09
25- 50  1.862e-08   1.004e-08
50-150  1.912e-08   1.181e-08
15-150  5.296e-08   2.913e-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: 2.26475     ( -0.213572   0.229038 )
Norm@50keV  : 2.24781E-03    ( -0.000344437   0.000336494 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          41.49 using 59 PHA bins.
# Reduced chi-squared =         0.7279 for     57 degrees of freedom 
# Null hypothesis probability =   9.389792e-01
 
Photon flux (15-150 keV)    in 12.43 sec: 0.385268 ( -0.0367529  0.0367544 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.65344e-07 ( -3.25411e-08  3.36894e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.52402     ( -1.9901   -1.9901 )
Epeak [keV] : 193.586      (   )
Norm@50keV  : 1.64388E-03    ( -0.000722123   0.000875854 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          40.58 using 59 PHA bins.
# Reduced chi-squared =         0.7246 for     56 degrees of freedom 
# Null hypothesis probability =   9.397749e-01
 
Photon flux (15-150 keV)    in 12.43 sec: 0.385105 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.64723e-07 ( -3.33795e-08  3.4277e-08 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.56784   ( 1.56783   1.56783 )
beta        : -2.27388    ( 2.27382   0.221482 )
Epeak [keV] : 12.2575      ( -12.2586 184.426 )
Norm@50keV   : 8.67196E-03    ( -0.00867154   1.27715e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          41.46 using 59 PHA bins.
# Reduced chi-squared =         0.7538 for     55 degrees of freedom 
# Null hypothesis probability =   9.115339e-01
 
Photon flux (15-150 keV)    in 12.43 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)  = 8.51e-08
S(50-100 keV) = 7.09e-08

T90 vs. Hardness ratio plot

T90                                   = 10.2880000174046 sec.
Hardness ratio (energy fluence ratio) = 0.833137

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 0.795854
Count Ratio (50-100 keV) / (15-25 keV) = 0.345867

Mask shadow pattern

IMX = -1.526928377026331E-01, IMY = -1.141703535166016E-01

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 72.000000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 72.000000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 72.000000

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:
-2.299400 0.968000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.3455  35.2518    5.3  44.0  -17.1  -0.0647  -2.2    7.7	Her X-1                       
 54.8218  81.4557    2.7  33.9 -128.4   0.1028   4.2 ------	UNKNOWN

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

Time interval of the image:
0.968000 13.396000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.3787  35.2378    6.3  44.0  -17.1   0.2270   1.9    7.4	Her X-1                       
176.3749  60.0252    1.1  10.8  143.2   0.7468  10.1 ------	UNKNOWN                       
251.5792  60.9359    2.2  24.4  -48.3   0.4390   5.4 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
117.100600 303.085400
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.4654  35.3719   17.2  54.2   -7.8   0.2992   0.7    1.8	Her X-1                       
175.6370  63.9630    2.7   4.0  -92.3   0.6222   4.3 ------	UNKNOWN                       
  0.0505  79.1653    3.1  40.8  -88.6   2.5871   3.7 ------	UNKNOWN

Plot creation:
Sun May 31 13:56:35 EDT 2015