batgrbproduct analysis for trigger=735331

batgrbproduct Analysis for Trigger=735331

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): Fri Feb 10 13:26:44 EST 2017
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger735331
======================================================================

  Trigger: 00735331      Segment: 000

  BAT Trigger Time: 507222827.2   [s; MET]
      Trigger Stop: 507222827.328   [s; MET]
               UTC: 2017-01-27T15:13:28.675820    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 19.9443848948679   Dec: -30.3376379347453  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.99
     Image Trigger?:     NO
     Rate S/N Ratio:     26.5141471671257  [ if not an image trigger ]
     Image S/N Ratio:    8.99

  Flight Position:   [ source = BAT ]
    RA: 19.9443848948679   Dec: -30.3376379347453  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 19.9967774194699   Dec: -30.3404327702013  [deg; J2000]  
        { 01h 19m 59.2s , -30d 20' 25.6" }
         +/- 1.93234130484958 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.864980295765155 [arcmin] (formal 1-sigma fit error)
    SNR: 11.8693567649006
 
  Angular difference between Flight and Ground position is 2.718225 arcmin
 
  Partial Coding Fraction: 0.75    [ including projection effects ]

  Duration
     T90: 0.512000024318695 +/- 0.144886159629968
        Measured from: 0.0480000376701355
                   to: 0.560000061988831     [s; relative to TRIGTIME]
     T50: 0.25600004196167 +/- 0.0815843606584965
        Measured from: 0.0799999833106995
                   to: 0.336000025272369     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.155999958515167     
                   to: 0.844000041484833     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0.0480000376701355     
                   to: 0.639999985694885     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.022746   0.043009   0.053874   0.022698
           0.005706   0.006559   0.006685   0.006466 [error]
 Peak      0.014402   0.049088   0.063172   0.016031
           0.007097   0.008283   0.008122   0.008007 [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 6.63e-09 1.78e-08 3.85e-08 2.17e-07 1.04e-07 2.80e-07   erg/cm2
              Error 1.95e-09 3.12e-09 6.13e-09 8.13e-08 1.65e-08 8.44e-08   erg/cm2
Peak flux Power-law 2.08e-01 3.19e-01 3.68e-01 8.14e-01 1.14e+00 1.71e+00   ph/cm2/s
              Error 7.05e-02 6.78e-02 6.28e-02 2.94e-01 1.89e-01 3.29e-01   ph/cm2/s
 
Fluence   Cutoff-PL 6.04e-09 1.82e-08 4.00e-08 1.33e-07 1.01e-07 1.97e-07   erg/cm2
              Error 2.23e-09 3.45e-09 7.24e-09 1.44e-07 1.76e-08 1.29e-07   erg/cm2
Peak flux Cutoff-PL 1.30e-01 3.44e-01 4.34e-01 2.20e-01 1.07e+00 1.13e+00   ph/cm2/s
              Error 8.16e-02 8.42e-02 8.30e-02 2.32e-01 1.97e-01 2.96e-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    0.886    0.254    -      -           1.55e-02 2.25e-03   48.490 57
CPL   0.520    0.802     230.2    0.0      2.27e-02 2.65e-02   48.030 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.795    0.272    -      -           9.88e-03 1.67e-03   63.430 57
CPL  -0.965    1.645      95.8   70.4      5.90e-02 1.76e-01   58.000 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: 0.512000 sec.
T50 in the 50-300 keV band: 0.320000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100    0.592    0.048    0.640
T90     0.512    0.048    0.560
T50     0.256    0.080    0.336
Peak    1.000   -0.156    0.844

Click here for the BAT GCN circular template

Special notes of this burst

Estimated redshift from machine learning (Ukwatta et al. 2016) - may take a few minute to calcaulte

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
   19.9968   -30.3404   0.0162    23.9758   144.9824         0.1539977     11.869 TRIG_00735331                 
 
Foreground time interval of the image:
  0.048   0.640 (delta_t =   0.592 [sec])
Background time interval of the image:
-239.200   0.048 (delta_t = 239.248 [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 0.128000

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 0.128000

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 0.128000

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    0.048 sec. to    0.640 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.885690     ( -0.260389   0.248086 )
Norm@50keV  : 1.55121E-02    ( -0.00225674   0.0022446 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.49 using 59 PHA bins.
# Reduced chi-squared =         0.8507 for     57 degrees of freedom 
# Null hypothesis probability =   7.814769e-01
 
Photon flux (15-150 keV)    in 0.592 sec: 1.78028 ( -0.25807  0.25851 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.03648e-07 ( -1.64429e-08  1.66205e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.048 sec. to    0.640 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.519825     ( -1.11542   0.489487 )
Epeak [keV] : 230.197      ( -230.197 -230.197 )
Norm@50keV  : 2.26659E-02    ( -0.0090471   0.0440328 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.03 using 59 PHA bins.
# Reduced chi-squared =         0.8577 for     56 degrees of freedom 
# Null hypothesis probability =   7.667165e-01
 
Photon flux (15-150 keV)    in 0.592 sec: 1.75557 ( -0.26635  0.2657 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.01511e-07 ( -1.77229e-08  1.74932e-08 ) ergs/cm2

Band function

Time interval is from    0.048 sec. to    0.640 sec.
 
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       :    (     )
beta        :     (     )
Epeak [keV] :       (   )
Norm@50keV   :     (     )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in  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]    : 23.6243  (-4.39605  5.93301)
R^2/D10^2   : 5.23984E-02  (-0.025483   0.0460052)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.31 using 59 PHA bins.
# Reduced chi-squared =         0.9528 for     57 degrees of freedom 
# Null hypothesis probability =   5.765995e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.096e-09   9.765e-10
25- 50  1.705e-08   4.295e-09
50-150  7.099e-08   1.963e-08
15-150  9.113e-08   2.164e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-34.241      -200)
Norm        : 6.91194       (-1.05777     1.05777)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.21 using 59 PHA bins.
# Reduced chi-squared =          1.162 for     57 degrees of freedom 
# Null hypothesis probability =   1.888948e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.019e-08   5.784e-09
25- 50  1.960e-08   1.103e-08
50-150  4.299e-08   2.422e-08
15-150  7.278e-08   4.129e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 8.05784        (-3.56307      6.4499)
R1^2/D10^2  : 0.703443        (-0.559824      3.83135)
kT2 [keV]   : 34.5790        (-10.4874      61.8037)
R2^2/D10^2  : 1.46385E-02    (-0.0128047   0.0304713)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          46.98 using 59 PHA bins.
# Reduced chi-squared =         0.8541 for     55 degrees of freedom 
# Null hypothesis probability =   7.707154e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.395e-09   3.623e-09
25- 50  1.834e-08   9.623e-09
50-150  7.826e-08   4.194e-08
15-150  1.030e-07   5.331e-08

Peak spectrum fit

Power-law model

Time interval is from   -0.156 sec. to    0.844 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.794507     ( -0.281191   0.263769 )
Norm@50keV  : 9.88203E-03    ( -0.00168132   0.00166625 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          63.43 using 59 PHA bins.
# Reduced chi-squared =          1.113 for     57 degrees of freedom 
# Null hypothesis probability =   2.600729e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.13596 ( -0.189092  0.1897 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.15766e-07 ( -2.03437e-08  2.05479e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.156 sec. to    0.844 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.965177     ( -1.94412   1.34587 )
Epeak [keV] : 95.7994      ( -23.6092 117.239 )
Norm@50keV  : 5.90331E-02    ( -0.0590331   0.293154 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.00 using 59 PHA bins.
# Reduced chi-squared =          1.036 for     56 degrees of freedom 
# Null hypothesis probability =   4.012907e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.06515 ( -0.196332  0.19759 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.04616e-07 ( -2.20084e-08  2.2661e-08 ) ergs/cm2

Band function

Time interval is from   -0.156 sec. to    0.844 sec.
 
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       :    (     )
beta        :     (     )
Epeak [keV] :       (   )
Norm@50keV   :     (     )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in  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]    : 22.7328  (-3.95089  5.41261)
R^2/D10^2   : 3.97727E-02  (-0.0190382   0.0323419)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.21 using 59 PHA bins.
# Reduced chi-squared =          1.021 for     57 degrees of freedom 
# Null hypothesis probability =   4.305434e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.746e-09   1.316e-09
25- 50  2.019e-08   5.465e-09
50-150  7.796e-08   2.132e-08
15-150  1.019e-07   2.753e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-36.5117      -200)
Norm        : 4.32180       (-0.781861     0.781861)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          82.48 using 59 PHA bins.
# Reduced chi-squared =          1.447 for     57 degrees of freedom 
# Null hypothesis probability =   1.528060e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.076e-08   6.345e-09
25- 50  2.070e-08   1.198e-08
50-150  4.539e-08   2.596e-08
15-150  7.685e-08   4.419e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 11.0626        (-11.2699      -11.2699)
R1^2/D10^2  : 6.12397E-02        (-0.0583388      -0.0583388)
kT2 [keV]   : 25.4892        (-25.637      -25.637)
R2^2/D10^2  : 2.51216E-02    (-0.0241106   0.0460507)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.96 using 59 PHA bins.
# Reduced chi-squared =          1.054 for     55 degrees of freedom 
# Null hypothesis probability =   3.666178e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.374e-09   4.888e-09
25- 50  2.054e-08   2.252e-08
50-150  8.032e-08   1.327e-07
15-150  1.052e-07   1.134e-07

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: 0.885690     ( -0.260389   0.248086 )
Norm@50keV  : 1.55121E-02    ( -0.00225674   0.0022446 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.49 using 59 PHA bins.
# Reduced chi-squared =         0.8507 for     57 degrees of freedom 
# Null hypothesis probability =   7.814769e-01
 
Photon flux (15-150 keV)    in 0.592 sec: 1.78031 ( -0.258071  0.258498 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.03638e-07 ( -1.6441e-08  1.66264e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.519824     ( -1.11542   0.489487 )
Epeak [keV] : 230.196      ( -230.197 -230.197 )
Norm@50keV  : 2.26659E-02    ( -0.0090471   0.0440328 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.03 using 59 PHA bins.
# Reduced chi-squared =         0.8577 for     56 degrees of freedom 
# Null hypothesis probability =   7.667165e-01
 
Photon flux (15-150 keV)    in 0.592 sec: 1.75553 ( -0.26631  0.26566 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.01559e-07 ( -1.7731e-08  1.75143e-08 ) ergs/cm2

Band function

 
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       :    (     )
beta        :     (     )
Epeak [keV] :       (   )
Norm@50keV   :     (     )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in  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)  = 1.78e-08
S(50-100 keV) = 3.85e-08

T90 vs. Hardness ratio plot

T90                                   = 0.512000024318695 sec.
Hardness ratio (energy fluence ratio) = 2.16292

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.89084
Count Ratio (50-100 keV) / (15-25 keV) = 2.3685

Mask shadow pattern

IMX = -3.642177927338491E-01, IMY = -2.551944129191230E-01

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.128000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.128000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.128000

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:
-239.200000 0.048000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
344.9402  40.1588    2.3  56.9   -2.0   6.7419   5.1 ------	UNKNOWN                       
352.6609   5.6798    3.3  21.9   -8.1   1.0363   3.5  556.2	UNKNOWN                       
342.3449  11.0188    2.0  31.3  -23.1   1.7785   5.9 ------	UNKNOWN                       
324.5088 -65.5491    2.7  55.9 -151.4   6.5375   4.3 ------	UNKNOWN

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

Time interval of the image:
0.048000 0.640000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 19.9968 -30.3404    1.0  24.0  145.0   0.1540  11.9 ------	UNKNOWN                       
354.7883  16.8922    2.0  32.3    2.4   0.0729   5.8 ------	UNKNOWN                       
320.6991   1.2972    2.1  42.1  -59.0   0.1708   5.6 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
58.500600 962.942500
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 32.9439  -2.3326    2.4  30.6   33.1   3.4960   4.7 ------	UNKNOWN                       
 55.7125 -76.2526    2.8  48.9  176.3   6.4551   4.1 ------	UNKNOWN                       
307.3244 -71.2405    2.8  55.9 -151.4  14.5614   4.1 ------	UNKNOWN                       
338.4685  -9.8972    2.7  43.6  -64.1  13.7698   4.2 ------	UNKNOWN                       
342.9805   7.8117    3.8  52.1  -42.2  10.5510   3.0 ------	UNKNOWN                       
324.4788 -47.2608    3.6  45.3 -121.3   9.2070   3.2 ------	UNKNOWN

Plot creation:
Fri Feb 10 17:24:16 EST 2017