batgrbproduct analysis for trigger=780845

batgrbproduct Analysis for Trigger=780845

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 20 05:10:05 EST 2018
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger780845
======================================================================

  Trigger: 00780845      Segment: 000

  BAT Trigger Time: 530233650.624   [s; MET]
      Trigger Stop: 530233658.816   [s; MET]
               UTC: 2017-10-20T23:07:10.751760    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 39.2624242628798   Dec: 15.1860174459639  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.64
     Image Trigger?:     NO
     Rate S/N Ratio:     17.464249196573  [ if not an image trigger ]
     Image S/N Ratio:    8.64

  Flight Position:   [ source = BAT ]
    RA: 39.2624242628798   Dec: 15.1860174459639  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 39.2594004674261   Dec: 15.1993590075078  [deg; J2000]  
        { 02h 37m 02.3s , +15d 11' 57.7" }
         +/- 1.80894193723606 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.601104503476604 [arcmin] (formal 1-sigma fit error)
    SNR: 13.0427422685848
 
  Angular difference between Flight and Ground position is 0.819418 arcmin
 
  Partial Coding Fraction: 0.4804688    [ including projection effects ]

  Duration
     T90: 41.8560000061989 +/- 9.19157878695337
        Measured from: 0.247999966144562
                   to: 42.1039999723434     [s; relative to TRIGTIME]
     T50: 17.727999985218 +/- 4.11358723729074
        Measured from: 7.09600001573563
                   to: 24.8240000009537     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 19.9399999976158     
                   to: 20.9399999976158     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.967999994754791     
                   to: 46.6480000019073     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.347207   0.461168   0.557084   0.250698
           0.062298   0.064489   0.054786   0.048090 [error]
 Peak      0.019563   0.038286   0.025938   0.010278
           0.008990   0.009323   0.007852   0.006996 [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 9.00e-08 2.20e-07 4.30e-07 2.08e-06 1.16e-06 2.82e-06   erg/cm2
              Error 2.18e-08 3.16e-08 5.15e-08 5.93e-07 1.36e-07 6.12e-07   erg/cm2
Peak flux Power-law 2.09e-01 2.36e-01 1.91e-01 2.57e-01 7.30e-01 8.93e-01   ph/cm2/s
              Error 1.07e-01 7.64e-02 6.23e-02 1.76e-01 2.13e-01 2.58e-01   ph/cm2/s
 
Fluence   Cutoff-PL 8.57e-08 2.23e-07 4.39e-07 1.61e-06 1.15e-06 2.36e-06   erg/cm2
              Error 2.68e-08 3.41e-08 6.17e-08 8.09e-07 1.45e-07 7.49e-07   erg/cm2
Peak flux Cutoff-PL 1.63e-01 2.57e-01 2.11e-01 9.16e-02 6.95e-01 7.23e-01   ph/cm2/s
              Error 1.32e-01 9.28e-02 7.71e-02 1.58e-01 2.26e-01 2.86e-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    1.033    0.203    -      -           2.29e-03 2.61e-04   66.610 57
CPL   0.844    0.667     354.5    0.0      2.77e-03 2.50e-03   66.460 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.308    0.484    -      -           6.11e-03 1.72e-03   73.820 57
CPL   0.116    2.769      82.7  -11.7      2.29e-02 6.41e-01   73.000 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: 25.856000 sec.
T50 in the 50-300 keV band: 11.776000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   47.616   -0.968   46.648
T90    41.856    0.248   42.104
T50    17.728    7.096   24.824
Peak    1.000   19.940   20.940

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
   39.2594    15.1994   0.0148    28.2642    74.6097         1.6979571     13.043 TRIG_00780845                 
 
Foreground time interval of the image:
 -0.968  46.648 (delta_t =  47.616 [sec])
Background time interval of the image:
-222.123  -0.968 (delta_t = 221.155 [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)

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   46.648 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.03304     ( -0.207175   0.19824 )
Norm@50keV  : 2.28507E-03    ( -0.000261864   0.000259613 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.61 using 59 PHA bins.
# Reduced chi-squared =          1.169 for     57 degrees of freedom 
# Null hypothesis probability =   1.799329e-01
 
Photon flux (15-150 keV)    in 47.62 sec: 0.263600 ( -0.031096  0.03127 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.16332e-06 ( -1.35351e-07  1.35892e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.968 sec. to   46.648 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.844352     ( -0.966446   0.368182 )
Epeak [keV] : 354.479      ( -354.69 -354.69 )
Norm@50keV  : 2.76835E-03    ( -0.000713439   0.00429516 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.46 using 59 PHA bins.
# Reduced chi-squared =          1.187 for     56 degrees of freedom 
# Null hypothesis probability =   1.598903e-01
 
Photon flux (15-150 keV)    in 47.62 sec: 0.261282 ( -0.032862  0.032553 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.15244e-06 ( -1.46462e-07  1.42587e-07 ) ergs/cm2

Band function

Time interval is from   -0.968 sec. to   46.648 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]    : 21.7016  (-3.00693  3.85487)
R^2/D10^2   : 9.65230E-03  (-0.00394094   0.00609029)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          77.00 using 59 PHA bins.
# Reduced chi-squared =          1.351 for     57 degrees of freedom 
# Null hypothesis probability =   3.997161e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.031e-08   9.355e-09
25- 50  2.114e-07   3.638e-08
50-150  7.436e-07   1.474e-07
15-150  9.954e-07   1.495e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-24.2228      -200)
Norm        : 1.11598       (-0.12833     0.12833)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          85.74 using 59 PHA bins.
# Reduced chi-squared =          1.504 for     57 degrees of freedom 
# Null hypothesis probability =   8.221340e-03
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.324e-07   7.433e-08
25- 50  2.547e-07   1.403e-07
50-150  5.585e-07   3.069e-07
15-150  9.455e-07   5.155e-07

Double BB

R1^2/D10^2  : 2.62858E-02        (-0.0156989      1.61642)
kT2 [keV]   : 200.000        (-170.833      -200)
R2^2/D10^2  : 3.92009E-05    (-1.7118e-05   0.000229064)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          69.00 using 59 PHA bins.
#Fit statistic : Chi-Squared =          66.65 using 59 PHA bins.
#Fit statistic : Chi-Squared =          66.30 using 59 PHA bins.
# Reduced chi-squared =          1.255 for     55 degrees of freedom 
# Reduced chi-squared =          1.212 for     55 degrees of freedom 
# Reduced chi-squared =          1.205 for     55 degrees of freedom 
# Null hypothesis probability =   9.704916e-02
# Null hypothesis probability =   1.348398e-01
# Null hypothesis probability =   1.414826e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.023e-08   4.258e-08
25- 50  2.020e-07   6.053e-08
50-150  8.041e-07   2.364e-07
15-150  1.096e-06   2.986e-07

Peak spectrum fit

Power-law model

Time interval is from   19.940 sec. to   20.940 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.30789     ( -0.492457   0.475409 )
Norm@50keV  : 6.11356E-03    ( -0.00172137   0.00172082 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          73.82 using 59 PHA bins.
# Reduced chi-squared =          1.295 for     57 degrees of freedom 
# Null hypothesis probability =   6.637389e-02
 
Photon flux (15-150 keV)    in 1 sec: 0.730443 ( -0.212249  0.213786 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.03045e-08 ( -1.82841e-08  1.86251e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   19.940 sec. to   20.940 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.116008     ( -3.95522   1.58273 )
Epeak [keV] : 82.7290      ( -59.3761 -82.7281 )
Norm@50keV  : 2.29400E-02    ( -0.022941   1.2592 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          73.00 using 59 PHA bins.
# Reduced chi-squared =          1.303 for     56 degrees of freedom 
# Null hypothesis probability =   6.314319e-02
 
Photon flux (15-150 keV)    in 1 sec: 0.694741 ( -0.227602  0.225139 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.59887e-08 ( -1.92562e-08  2.03456e-08 ) ergs/cm2

Band function

Time interval is from   19.940 sec. to   20.940 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]    : 17.1315  (-4.49439  7.00645)
R^2/D10^2   : 5.68759E-02  (-0.0568759   0.105834)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          73.67 using 59 PHA bins.
# Reduced chi-squared =          1.293 for     57 degrees of freedom 
# Null hypothesis probability =   6.782320e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.392e-09   1.905e-09
25- 50  1.510e-08   9.085e-09
50-150  3.172e-08   1.890e-08
15-150  5.022e-08   2.578e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (-111.411      -199.363)
Norm        : 3.05902       (-0.866119     0.866119)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          74.22 using 59 PHA bins.
# Reduced chi-squared =          1.302 for     57 degrees of freedom 
# Null hypothesis probability =   6.235627e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.617e-09   4.685e-09
25- 50  1.465e-08   8.960e-09
50-150  3.214e-08   1.946e-08
15-150  5.441e-08   3.254e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 4.20787        (-4.20787      -4.20787)
R1^2/D10^2  : 2.51140        (-2.51343      -2.51343)
kT2 [keV]   : 19.0104        (-5.73577      -19.0101)
R2^2/D10^2  : 3.75053E-02    (-0.037508   0.100423)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          72.90 using 59 PHA bins.
# Reduced chi-squared =          1.325 for     55 degrees of freedom 
# Null hypothesis probability =   5.346684e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.568e-09   3.359e-09
25- 50  1.403e-08   8.075e-09
50-150  3.406e-08   2.157e-08
15-150  5.366e-08   3.020e-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: 1.03304     ( -0.207175   0.19824 )
Norm@50keV  : 2.28507E-03    ( -0.000261864   0.000259613 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.61 using 59 PHA bins.
# Reduced chi-squared =          1.169 for     57 degrees of freedom 
# Null hypothesis probability =   1.799329e-01
 
Photon flux (15-150 keV)    in 47.62 sec: 0.263597 ( -0.0310885  0.0312704 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.16319e-06 ( -1.3531e-07  1.36148e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.844393     ( -0.966457   0.368171 )
Epeak [keV] : 354.546      ( -354.695 -354.695 )
Norm@50keV  : 2.76823E-03    ( -0.000713436   0.00429517 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.46 using 59 PHA bins.
# Reduced chi-squared =          1.187 for     56 degrees of freedom 
# Null hypothesis probability =   1.598903e-01
 
Photon flux (15-150 keV)    in 47.62 sec: 0.261266 ( -0.032852  0.03267 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.15295e-06 ( -1.46479e-07  1.42893e-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)  = 2.20e-07
S(50-100 keV) = 4.30e-07

T90 vs. Hardness ratio plot

T90                                   = 41.8560000061989 sec.
Hardness ratio (energy fluence ratio) = 1.95455

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.32822
Count Ratio (50-100 keV) / (15-25 keV) = 1.60447

Mask shadow pattern

IMX = 1.426852745462230E-01, IMY = -5.183595386081318E-01

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:
-222.123400 -0.968000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6323  22.0152    0.7  42.6    0.7   8.9216  17.3    0.1	Crab                          
326.0768  38.3765   27.6  53.5 -173.5   0.4219   0.4    5.5	Cyg X-2                       
 75.7324   2.1585    2.5  52.6   26.4   8.3757   4.6 ------	UNKNOWN                       
 40.9161  61.4295    0.2  18.0 -101.9  25.2126  75.4 ------	UNKNOWN                       
 18.3178  67.2981    2.6  26.3 -122.8   1.6749   4.5 ------	UNKNOWN

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

Time interval of the image:
-0.968000 46.648000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.7957  21.9756    4.4  42.7    0.6  -0.3594  -2.6    9.3	Crab                          
326.1118  38.4004   15.1  53.5 -173.5  -0.2196  -0.8    5.5	Cyg X-2                       
354.8875  18.8278    2.8  44.3  145.7   1.0212   4.2 ------	UNKNOWN                       
 39.2594  15.1994    0.9  28.3   74.6   1.6978  13.0 ------	UNKNOWN                       
 97.2749  13.2727    2.3  58.0   -2.2   2.8901   5.0 ------	UNKNOWN                       
 36.6480  62.8086    3.1  19.4 -108.1   0.3653   3.7 ------	UNKNOWN                       
333.1448  63.4855    2.5  41.6 -142.7   0.7719   4.7 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
127.076590 962.535500
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
349.2157  45.8783    2.9  51.7  154.7  13.2938   3.9 ------	UNKNOWN                       
 21.5963 -13.0659    3.2  33.2   50.2   4.3117   3.6 ------	UNKNOWN                       
 19.1953   3.1815    3.0  23.1   78.3   3.5177   3.9 ------	UNKNOWN                       
  1.9855  42.5380    3.3  42.0  155.7   5.6344   3.5 ------	UNKNOWN                       
 40.9557  61.4308    0.3  46.3 -161.3  76.6161  42.8 ------	UNKNOWN                       
 79.9785 -28.6636    3.3  58.9  -24.4  19.3733   3.5 ------	UNKNOWN

Plot creation:
Sat Jan 20 09:27:09 EST 2018