batgrbproduct analysis for trigger=755343

batgrbproduct Analysis for Trigger=755343

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 Jun 21 15:42:25 EDT 2017
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger755343
======================================================================

  Trigger: 00755343      Segment: 000

  BAT Trigger Time: 517954072   [s; MET]
      Trigger Stop: 517954136   [s; MET]
               UTC: 2017-05-31T20:07:32.854060    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 121.26141607388   Dec: -14.0329183842728  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.14
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    7.14

  Flight Position:   [ source = BAT ]
    RA: 121.26141607388   Dec: -14.0329183842728  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 121.217595678026   Dec: -14.0162260395099  [deg; J2000]  
        { 08h 04m 52.2s , -14d 00' 58.4" }
         +/- 2.38920856447251 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.13621791953754 [arcmin] (formal 1-sigma fit error)
    SNR: 8.76507089210646
 
  Angular difference between Flight and Ground position is 2.740425 arcmin
 
  Partial Coding Fraction: 0.9296875    [ including projection effects ]

  Duration
     T90: 32.3039999604225 +/- 7.92819475938395
        Measured from: -9.94800001382828
                   to: 22.3559999465942     [s; relative to TRIGTIME]
     T50: 16.555999994278 +/- 5.74570581899996
        Measured from: -2.68800002336502
                   to: 13.8679999709129     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -4.31599998474121     
                   to: -3.31599998474121     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -13.244000017643     
                   to: 25.7960000038147     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.307406   0.345636   0.391131   0.145723
           0.052694   0.052675   0.047972   0.048472 [error]
 Peak      0.017965   0.015137   0.019821   0.030882
           0.008433   0.008589   0.007881   0.007950 [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 7.30e-08 1.59e-07 2.74e-07 1.09e-06 7.50e-07 1.60e-06   erg/cm2
              Error 2.05e-08 2.50e-08 4.83e-08 4.67e-07 1.20e-07 4.93e-07   erg/cm2
Peak flux Power-law 2.29e-02 6.52e-02 1.52e-01 9.55e-01 4.09e-01 1.17e+00   ph/cm2/s
              Error 6.54e-02 8.72e-02 8.89e-02 1.28e+00 2.42e-01 1.32e+00   ph/cm2/s
 
Fluence   Cutoff-PL 7.30e-08 1.60e-07 2.74e-07 1.08e-06 7.50e-07 1.59e-06   erg/cm2
              Error 2.05e-08 2.50e-08 -------- -------- 1.20e-07 5.32e-07   erg/cm2
Peak flux Cutoff-PL -------- -------- -------- -------- -------- --------   ph/cm2/s
              Error -------- -------- -------- -------- -------- --------   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    1.217    0.278    -      -           1.91e-03 2.59e-04   57.890 57
CPL   2.148    0.970      53.4    0.0      5.90e-04 0.00e+00   56.700 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL   -2.102    1.530    -      -           2.86e-04 1.93e-03   65.380 57
CPL  -3.273    0.000    9568.0    0.0      5.40e-05 0.00e+00   65.370 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: 16.064000 sec.
T50 in the 50-300 keV band: 9.408000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   39.040  -13.244   25.796
T90    32.304   -9.948   22.356
T50    16.556   -2.688   13.868
Peak    1.000   -4.316   -3.316

Click here for the BAT GCN circular template

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
  121.2176   -14.0162   0.0219    16.0180  -132.1513         0.9843636      8.765 TRIG_00755343                 
 
Foreground time interval of the image:
-13.244  25.796 (delta_t =  39.040 [sec])
Background time interval of the image:
-119.000 -13.244 (delta_t = 105.756 [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 64.000000

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 64.000000

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 64.000000

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  -13.244 sec. to   25.796 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.21744     ( -0.279872   0.275695 )
Norm@50keV  : 1.90562E-03    ( -0.000259102   0.000258463 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.89 using 59 PHA bins.
# Reduced chi-squared =          1.016 for     57 degrees of freedom 
# Null hypothesis probability =   4.422032e-01
 
Photon flux (15-150 keV)    in 39.04 sec: 0.224247 ( -0.031114  0.031267 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.51188e-07 ( -1.18733e-07  1.20819e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -13.244 sec. to   25.796 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.14785     ( -1.24813   0.69212 )
Epeak [keV] : 53.3538      (   )
Norm@50keV  : 5.90396E-04    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.70 using 59 PHA bins.
# Reduced chi-squared =          1.012 for     56 degrees of freedom 
# Null hypothesis probability =   4.488946e-01
 
Photon flux (15-150 keV)    in 39.04 sec: 0.224226 ( -0.031198  0.031203 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.50396e-07 ( -1.18377e-07  1.21129e-07 ) ergs/cm2

Band function

Time interval is from  -13.244 sec. to   25.796 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]    : 21.1435  (-4.28402  5.79525)
R^2/D10^2   : 8.21214E-03  (-0.00428404   0.00869467)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          76.59 using 59 PHA bins.
# Reduced chi-squared =          1.344 for     57 degrees of freedom 
# Null hypothesis probability =   4.272877e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.700e-08   8.643e-09
25- 50  1.394e-07   3.117e-08
50-150  4.646e-07   1.215e-07
15-150  6.310e-07   1.638e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-50.7075      -200)
Norm        : 0.917994       (-0.126813     0.126813)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          63.59 using 59 PHA bins.
# Reduced chi-squared =          1.116 for     57 degrees of freedom 
# Null hypothesis probability =   2.555345e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.924e-08   4.983e-08
25- 50  1.717e-07   9.674e-08
50-150  3.765e-07   2.083e-07
15-150  6.374e-07   3.531e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.31978        (-1.79979      2.3377)
R1^2/D10^2  : 0.638932        (-0.484542      1.93038)
kT2 [keV]   : 32.8183        (-8.96452      21.3191)
R2^2/D10^2  : 1.94580E-03    (-0.00142447   0.00317033)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.10 using 59 PHA bins.
# Reduced chi-squared =          1.002 for     55 degrees of freedom 
# Null hypothesis probability =   4.709867e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.934e-08   4.805e-08
25- 50  1.359e-07   5.709e-08
50-150  5.676e-07   2.894e-07
15-150  7.928e-07   3.644e-07

Peak spectrum fit

Power-law model

Time interval is from   -4.316 sec. to   -3.316 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.10194     ( -0.720059   2.33913 )
Norm@50keV  : 2.86290E-04    ( -0.000290132   0.0035707 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.38 using 59 PHA bins.
# Reduced chi-squared =          1.147 for     57 degrees of freedom 
# Null hypothesis probability =   2.087096e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.408909 ( -0.408909  0.074177 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.70637e-08 ( -2.15038e-08  2.07991e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -4.316 sec. to   -3.316 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -3.27315     (     )
Epeak [keV] : 9568.00      (   )
Norm@50keV  : 5.39512E-05    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.37 using 59 PHA bins.
# Reduced chi-squared =          1.167 for     56 degrees of freedom 
# Null hypothesis probability =   1.833258e-01
 
Photon flux (15-150 keV)    in 1 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.68617e-08 ( -2.1413e-08  2.06666e-08 ) ergs/cm2

Band function

Time interval is from   -4.316 sec. to   -3.316 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]    : 200.000  (-200  -200)
R^2/D10^2   : 2.04347E-04  (-7.48506e-05   -0.000204452)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          68.19 using 59 PHA bins.
# Reduced chi-squared =          1.196 for     57 degrees of freedom 
# Null hypothesis probability =   1.473559e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.463e-10   2.650e-10
25- 50  2.785e-09   2.056e-09
50-150  5.391e-08   5.475e-08
15-150  5.704e-08   5.960e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.362       (-123.466      -199.363)
Norm        : 1.85411       (-0.788435     0.788396)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          73.39 using 59 PHA bins.
# Reduced chi-squared =          1.287 for     57 degrees of freedom 
# Null hypothesis probability =   7.085450e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.617e-09   3.191e-09
25- 50  8.881e-09   5.835e-09
50-150  1.948e-08   1.255e-08
15-150  3.298e-08   2.145e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.17901        (-4.12437      5.73847)
R1^2/D10^2  : 0.775470        (-0.759993      1.48518)
kT2 [keV]   : 199.363        (-199.363      -199.363)
R2^2/D10^2  : 1.90059E-04    (-7.57763e-05   0.00113076)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          63.89 using 59 PHA bins.
# Reduced chi-squared =          1.162 for     55 degrees of freedom 
# Null hypothesis probability =   1.924356e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.342e-09   2.910e-09
25- 50  6.422e-09   3.714e-09
50-150  5.077e-08   2.119e-08
15-150  6.154e-08   2.121e-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: 1.21744     ( -0.279872   0.275695 )
Norm@50keV  : 1.90562E-03    ( -0.000259102   0.000258463 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.89 using 59 PHA bins.
# Reduced chi-squared =          1.016 for     57 degrees of freedom 
# Null hypothesis probability =   4.422032e-01
 
Photon flux (15-150 keV)    in 39.04 sec: 0.224245 ( -0.0311125  0.0312658 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.51106e-07 ( -1.187e-07  1.20808e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.18249     ( -1.27618   0.780515 )
Epeak [keV] : 65.1036      (   )
Norm@50keV  : 5.69584E-04    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.66 using 59 PHA bins.
# Reduced chi-squared =          1.012 for     56 degrees of freedom 
# Null hypothesis probability =   4.501106e-01
 
Photon flux (15-150 keV)    in 39.04 sec: 0.224806 ( -0.031956  0.030694 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.53667e-07 ( -1.2127e-07  1.13013e-07 ) 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)  = 1.59e-07
S(50-100 keV) = 2.74e-07

T90 vs. Hardness ratio plot

T90                                   = 32.3039999604225 sec.
Hardness ratio (energy fluence ratio) = 1.72327

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.12436
Count Ratio (50-100 keV) / (15-25 keV) = 1.27236

Mask shadow pattern

IMX = -1.926601922337032E-01, IMY = 2.128380030077487E-01

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000

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:
-119.000000 -13.244000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.5723 -40.7221   42.6  30.8  156.2  -0.0611  -0.3   10.2	Vela X-1                      
113.4315 -57.8283    3.1  51.2  169.9   2.3167   3.6 ------	UNKNOWN                       
115.0679 -50.9821    2.3  44.8  173.6   1.9623   5.0 ------	UNKNOWN                       
107.4145 -45.2510    2.5  43.5 -175.6   1.4443   4.5 ------	UNKNOWN                       
105.8199  15.5592    2.8  40.1  -76.8   2.6237   4.1 ------	UNKNOWN

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

Time interval of the image:
-13.244000 25.796000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.4460 -40.4819    8.1  30.5  156.4  -0.2070  -1.4    5.8	Vela X-1                      
179.9939  -6.0312    1.9  42.7   62.1   3.0161   6.2 ------	UNKNOWN                       
180.1564  -1.5882    2.2  43.6   55.7   2.3158   5.4 ------	UNKNOWN                       
147.3637   1.7816    2.4  15.6   15.6   0.4970   4.8 ------	UNKNOWN                       
100.0524 -55.1929    2.8  53.8  179.2   1.7004   4.0 ------	UNKNOWN                       
121.2176 -14.0162    1.3  16.0 -132.2   0.9843   8.8 ------	UNKNOWN                       
146.3641  34.0395    2.4  44.9  -15.1   0.8774   4.8 ------	UNKNOWN                       
 90.7111 -11.1087    2.8  45.5 -121.8   2.0173   4.1 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
111.500600 288.300600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.6062 -40.4310    4.5  29.2  123.2  -0.9813  -2.6    8.2	Vela X-1                      
 69.9458 -42.0899    2.9  52.2 -167.0   3.0116   4.0 ------	UNKNOWN                       
 98.0630   2.0840    2.6  28.1  -90.9   1.5745   4.5 ------	UNKNOWN                       
 62.7853 -30.2192    2.9  55.9 -151.3   6.0571   4.0 ------	UNKNOWN                       
116.2696  36.2861    2.9  50.5  -39.4   4.4226   4.0 ------	UNKNOWN                       
 65.7029 -22.8142    2.4  53.2 -142.3   8.9868   4.8 ------	UNKNOWN

Plot creation:
Thu Jun 22 11:36:05 EDT 2017