batgrbproduct analysis for trigger=799669

batgrbproduct Analysis for Trigger=799669

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 04:32:32 EST 2018
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger799669
======================================================================

  Trigger: 00799669      Segment: 000

  BAT Trigger Time: 535652720   [s; MET]
      Trigger Stop: 535652800   [s; MET]
               UTC: 2017-12-22T16:24:59.803500    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 148.293325459001   Dec: 35.6217756112652  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    10.49
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    10.49

  Flight Position:   [ source = BAT ]
    RA: 148.293325459001   Dec: 35.6217756112652  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 148.271845515373   Dec: 35.6225456918433  [deg; J2000]  
        { 09h 53m 05.2s , +35d 37' 21.2" }
         +/- 1.66129134913719 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.601041693336903 [arcmin] (formal 1-sigma fit error)
    SNR: 14.7297645026019
 
  Angular difference between Flight and Ground position is 1.048650 arcmin
 
  Partial Coding Fraction: 0.6015625    [ including projection effects ]

  Duration
     T90: 173.871999979019 +/- 23.8695096243794
        Measured from: 12.8479999899864
                   to: 186.719999969006     [s; relative to TRIGTIME]
     T50: 99.9399999380112 +/- 18.7910967328076
        Measured from: 43
                   to: 142.939999938011     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 61.3439999818802     
                   to: 62.3439999818802     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 8.00400000810623     
                   to: 210.087999999523     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.387253   1.330209   0.671588   0.106928
           0.102707   0.105154   0.088044   0.074649 [error]
 Peak      0.032780   0.031063   0.012872  -0.001684
           0.008587   0.008906   0.007150   0.005776 [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 4.26e-07 5.70e-07 5.62e-07 9.92e-07 1.88e-06 2.55e-06   erg/cm2
              Error 5.40e-08 4.96e-08 8.46e-08 2.97e-07 1.93e-07 3.88e-07   erg/cm2
Peak flux Power-law 3.16e-01 2.20e-01 1.01e-01 6.44e-02 6.68e-01 7.02e-01   ph/cm2/s
              Error 1.40e-01 7.29e-02 5.73e-02 7.84e-02 2.18e-01 2.30e-01   ph/cm2/s
 
Fluence   Cutoff-PL 4.22e-07 5.80e-07 5.60e-07 7.68e-07 1.86e-06 2.32e-06   erg/cm2
              Error 5.62e-08 7.13e-08 8.86e-08 5.78e-07 2.21e-07 6.67e-07   erg/cm2
Peak flux Cutoff-PL 3.08e-01 2.28e-01 1.02e-01 4.45e-02 6.65e-01 6.83e-01   ph/cm2/s
              Error 1.47e-01 -------- -------- 6.05e-02 2.18e-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    2.023    0.167    -      -           1.01e-03 1.10e-04   58.870 57
CPL   1.893    0.474      34.7   -4.7      1.20e-03 1.13e-03   58.740 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.127    0.667    -      -           4.19e-03 1.85e-03   39.650 57
CPL   1.847    1.267      23.8    0.0      6.06e-03 0.00e+00   39.610 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: 152.064000 sec.
T50 in the 50-300 keV band: 99.008000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  202.084    8.004  210.088
T90   173.872   12.848  186.720
T50    99.940   43.000  142.940
Peak    1.000   61.344   62.344

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
  148.2718    35.6225   0.0130    37.6289     4.1994         2.3282373     14.730 TRIG_00799669                 
 
Foreground time interval of the image:
  8.004  89.301 (delta_t =  81.297 [sec])
Background time interval of the image:
-239.000   8.004 (delta_t = 247.004 [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    8.004 sec. to  210.088 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.02276     ( -0.163922   0.170767 )
Norm@50keV  : 1.00857E-03    ( -0.000111046   0.000108743 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.87 using 59 PHA bins.
# Reduced chi-squared =          1.033 for     57 degrees of freedom 
# Null hypothesis probability =   4.070246e-01
 
Photon flux (15-150 keV)    in 202.1 sec: 0.152902 ( -0.013389  0.013396 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.8825e-06 ( -1.91923e-07  1.9502e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from    8.004 sec. to  210.088 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.89265     ( -0.715882   0.232882 )
Epeak [keV] : 34.7480      ( -25.4084 -34.7507 )
Norm@50keV  : 1.19898E-03    ( -0.000379441   0.00187923 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.74 using 59 PHA bins.
# Reduced chi-squared =          1.049 for     56 degrees of freedom 
# Null hypothesis probability =   3.752399e-01
 
Photon flux (15-150 keV)    in 202.1 sec: 0.152118 ( -0.01395  0.013649 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.85633e-06 ( -2.28177e-07  2.12884e-07 ) ergs/cm2

Band function

Time interval is from    8.004 sec. to  210.088 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]    : 9.82798  (-1.06181  1.18742)
R^2/D10^2   : 7.38817E-02  (-0.0263441   0.0413731)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          92.69 using 59 PHA bins.
# Reduced chi-squared =          1.626 for     57 degrees of freedom 
# Null hypothesis probability =   1.964352e-03
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.919e-07   4.264e-08
25- 50  7.081e-07   8.337e-08
50-150  3.514e-07   8.377e-08
15-150  1.351e-06   1.555e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 65.2415       (-15.9063      24.2987)
Norm        : 0.767065       (-0.109959     0.125798)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.55 using 59 PHA bins.
# Reduced chi-squared =          1.062 for     57 degrees of freedom 
# Null hypothesis probability =   3.491464e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.944e-07   4.345e-08
25- 50  6.154e-07   6.043e-08
50-150  7.491e-07   1.687e-07
15-150  1.759e-06   1.943e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.03828        (-1.2285      1.69359)
R1^2/D10^2  : 0.703909        (-0.451769      1.51671)
kT2 [keV]   : 17.7679        (-4.0767      10.0905)
R2^2/D10^2  : 5.59871E-03    (-0.00456824   0.0107975)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.45 using 59 PHA bins.
# Reduced chi-squared =          1.099 for     55 degrees of freedom 
# Null hypothesis probability =   2.855111e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.285e-07   1.899e-07
25- 50  5.662e-07   2.066e-07
50-150  7.611e-07   4.317e-07
15-150  1.756e-06   6.420e-07

Peak spectrum fit

Power-law model

Time interval is from   61.344 sec. to   62.344 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.12701     ( -0.582488   0.751566 )
Norm@50keV  : 4.19165E-03    ( -0.00193912   0.00176756 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          39.65 using 59 PHA bins.
# Reduced chi-squared =         0.6957 for     57 degrees of freedom 
# Null hypothesis probability =   9.610044e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.668443 ( -0.21774  0.217785 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.90607e-08 ( -1.50425e-08  1.5743e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   61.344 sec. to   62.344 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.84669     ( -2.32453   0.209135 )
Epeak [keV] : 23.7728      (   )
Norm@50keV  : 6.06269E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          39.61 using 59 PHA bins.
# Reduced chi-squared =         0.7072 for     56 degrees of freedom 
# Null hypothesis probability =   9.523624e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.664582 ( -0.219776  0.216519 ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

Band function

Time interval is from   61.344 sec. to   62.344 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]    : 9.39841  (-3.60457  5.90801)
R^2/D10^2   : 0.388872  (-0.383697   2.16905)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          42.69 using 59 PHA bins.
# Reduced chi-squared =         0.7489 for     57 degrees of freedom 
# Null hypothesis probability =   9.205228e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.828e-09   4.321e-09
25- 50  1.551e-08   9.720e-09
50-150  6.744e-09   5.180e-09
15-150  2.908e-08   1.881e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 58.8724       (-35.2114      -58.8721)
Norm        : 3.54237       (-1.53844     3.14175)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          39.75 using 59 PHA bins.
# Reduced chi-squared =         0.6974 for     57 degrees of freedom 
# Null hypothesis probability =   9.600174e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.875e-09   5.658e-09
25- 50  1.343e-08   8.309e-09
50-150  1.504e-08   1.231e-08
15-150  3.734e-08   2.434e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 4.25574        (-4.27798      6.0605)
R1^2/D10^2  : 6.38373        (-5.9222      -6.15674)
kT2 [keV]   : 16.6244        (-16.7076      -16.708)
R2^2/D10^2  : 3.35900E-02    (-0.0325602   0.538665)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          39.59 using 59 PHA bins.
# Reduced chi-squared =         0.7199 for     55 degrees of freedom 
# Null hypothesis probability =   9.416431e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.679e-09   5.695e-09
25- 50  1.160e-08   6.410e-09
50-150  1.625e-08   1.224e-08
15-150  3.753e-08   1.947e-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: 1.81150     ( -0.188159   0.193918 )
Norm@50keV  : 1.63596E-03    ( -0.000196354   0.000193073 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.29 using 59 PHA bins.
# Reduced chi-squared =         0.9524 for     57 degrees of freedom 
# Null hypothesis probability =   5.775420e-01
 
Photon flux (15-150 keV)    in 81.3 sec: 0.226444 ( -0.0247985  0.0248286 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.22396e-06 ( -1.47844e-07  1.49428e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.57563     ( -0.842169   0.725753 )
Epeak [keV] : 82.4839      (   )
Norm@50keV  : 2.20087E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.98 using 59 PHA bins.
# Reduced chi-squared =         0.9640 for     56 degrees of freedom 
# Null hypothesis probability =   5.516453e-01
 
Photon flux (15-150 keV)    in 81.3 sec: 0.224519 ( -0.025575  0.025473 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.20104e-06 ( -1.6538e-07  1.64137e-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)  = 5.70e-07
S(50-100 keV) = 5.62e-07

T90 vs. Hardness ratio plot

T90                                   = 173.871999979019 sec.
Hardness ratio (energy fluence ratio) = 0.985965

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 0.95888
Count Ratio (50-100 keV) / (15-25 keV) = 0.484114

Mask shadow pattern

IMX = 7.688365867807131E-01, IMY = -5.645186769244518E-02

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:
-239.000000 8.004000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.1503  33.0107    3.2  33.0  104.6   1.7261   3.6 ------	UNKNOWN                       
130.8375  33.6549    2.4  33.1   28.1   1.5938   4.8 ------	UNKNOWN                       
 40.9265  61.4279    0.2  29.1 -174.6  15.5668  56.6 ------	UNKNOWN                       
347.4721  49.9252    3.2  57.3 -154.0   5.8465   3.6 ------	UNKNOWN                       
183.6776  29.3441    3.6  58.7  -25.8   6.4191   3.2 ------	UNKNOWN

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

Time interval of the image:
8.004000 89.300610
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
130.7981  40.7029    2.2  26.6   22.6   0.6754   5.3 ------	UNKNOWN                       
148.2718  35.6225    0.8  37.6    4.2   2.3282  14.7 ------	UNKNOWN                       
137.0188  61.9865    2.0  14.4  -32.5   0.6307   5.8 ------	UNKNOWN                       
167.2717  23.7478    2.9  56.1   -7.4   1.6484   4.1 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
158.500600 963.070700
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
188.3721  50.7171    2.6  32.4 -132.7   2.9564   4.4 ------	UNKNOWN                       
234.8476  64.8095    3.7  56.8 -151.8   9.9779   3.1 ------	UNKNOWN

Plot creation:
Sat Jan 20 09:05:09 EST 2018