batgrbproduct analysis for trigger=755867

batgrbproduct Analysis for Trigger=755867

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 15:26:01 EDT 2017
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger755867
======================================================================

  Trigger: 00755867      Segment: 000

  BAT Trigger Time: 518296149.568   [s; MET]
      Trigger Stop: 518296153.664   [s; MET]
               UTC: 2017-06-04T19:08:50.402040    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 342.645334010525   Dec: -15.4143151566099  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.97
     Image Trigger?:     NO
     Rate S/N Ratio:     30.6267856622271  [ if not an image trigger ]
     Image S/N Ratio:    7.97

  Flight Position:   [ source = BAT ]
    RA: 342.645334010525   Dec: -15.4143151566099  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 342.645244721413   Dec: -15.404374103901  [deg; J2000]  
        { 22h 50m 34.9s , -15d 24' 15.7" }
         +/- 1.30291349247094 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.58567330290179 [arcmin] (formal 1-sigma fit error)
    SNR: 20.8426657349901
 
  Angular difference between Flight and Ground position is 0.596486 arcmin
 
  Partial Coding Fraction: 0.08789062    [ including projection effects ]

  Duration
     T90: 26.527999997139 +/- 2.83976335112829
        Measured from: -10.2960000038147
                   to: 16.2319999933243     [s; relative to TRIGTIME]
     T50: 8.81600004434586 +/- 1.08705842583515
        Measured from: -4.00800001621246
                   to: 4.80800002813339     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 2.63599997758865     
                   to: 3.63599997758865     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -11.6560000181198     
                   to: 18.839999973774     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.430839   2.177472   2.331546   1.036795
           0.139353   0.153619   0.140583   0.124146 [error]
 Peak      0.109885   0.192326   0.179610   0.088507
           0.029141   0.033633   0.030259   0.024575 [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 5.43e-07 1.13e-06 1.84e-06 6.74e-06 5.09e-06 1.02e-05   erg/cm2
              Error 7.32e-08 9.09e-08 1.37e-07 1.14e-06 3.50e-07 1.21e-06   erg/cm2
Peak flux Power-law 1.51e+00 1.42e+00 9.30e-01 9.41e-01 4.25e+00 4.81e+00   ph/cm2/s
              Error 4.81e-01 3.11e-01 1.96e-01 3.50e-01 9.03e-01 9.48e-01   ph/cm2/s
 
Fluence   Cutoff-PL 5.40e-07 1.13e-06 1.85e-06 6.71e-06 5.09e-06 1.00e-05   erg/cm2
              Error 7.79e-08 9.74e-08 1.53e-07 1.80e-06 3.59e-07 2.04e-06   erg/cm2
Peak flux Cutoff-PL 1.06e+00 1.54e+00 1.20e+00 5.49e-01 4.16e+00 4.35e+00   ph/cm2/s
              Error 5.64e-01 3.68e-01 3.08e-01 3.32e-01 9.02e-01 9.62e-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    1.297    0.117    -      -           1.69e-02 1.12e-03   67.720 57
CPL   1.293    0.287    9997.5    0.0      1.69e-02 5.52e-03   67.720 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.614    0.264    -      -           3.29e-02 6.42e-03   69.190 57
CPL   0.356    1.220      83.5   61.6      1.13e-01 1.88e-01   65.130 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: 15.808000 sec.
T50 in the 50-300 keV band: 6.912000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   30.496  -11.656   18.840
T90    26.528  -10.296   16.232
T50     8.816   -4.008    4.808
Peak    1.000    2.636    3.636

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
  342.6452   -15.4044   0.0092    52.4058   165.4841         7.1941994     20.843 TRIG_00755867                 
 
Foreground time interval of the image:
-11.656  18.840 (delta_t =  30.496 [sec])
Background time interval of the image:
-575.167 -560.790 (delta_t =  14.377 [sec])
-239.568 -11.656 (delta_t = 227.912 [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 4.096000

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 4.096000

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 4.096000

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  -11.656 sec. to   18.840 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.29669     ( -0.117622   0.116047 )
Norm@50keV  : 1.68724E-02    ( -0.00112512   0.00112249 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.72 using 59 PHA bins.
# Reduced chi-squared =          1.188 for     57 degrees of freedom 
# Null hypothesis probability =   1.564681e-01
 
Photon flux (15-150 keV)    in 30.5 sec: 2.01171 ( -0.14564  0.14644 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.09002e-06 ( -3.50006e-07  3.50741e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -11.656 sec. to   18.840 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.29260     ( -0.398384   0.175862 )
Epeak [keV] : 9997.53      ( -9997.37 -9997.37 )
Norm@50keV  : 1.69446E-02    ( -0.00111803   0.00992 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.72 using 59 PHA bins.
# Reduced chi-squared =          1.209 for     56 degrees of freedom 
# Null hypothesis probability =   1.355513e-01
 
Photon flux (15-150 keV)    in 30.5 sec: 2.00939 ( -0.15211  0.14343 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.08569e-06 ( -3.618e-07  3.562e-07 ) ergs/cm2

Band function

Time interval is from  -11.656 sec. to   18.840 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]    : 19.8429  (  )
R^2/D10^2   : 9.09548E-02  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         127.86 using 59 PHA bins.
# Reduced chi-squared =         2.2432 for     57 degrees of freedom 
# Null hypothesis probability =   2.342170e-07
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.112e-07   3.029e-08
25- 50  1.047e-06   1.093e-07
50-150  3.052e-06   3.349e-07
15-150  4.309e-06   3.584e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-14.8848      -200)
Norm        : 8.57281       (-0.57365     0.57365)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          84.77 using 59 PHA bins.
# Reduced chi-squared =          1.487 for     57 degrees of freedom 
# Null hypothesis probability =   9.929002e-03
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.513e-07   5.063e-08
25- 50  1.253e-06   9.577e-08
50-150  2.748e-06   6.005e-07
15-150  4.652e-06   6.817e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.93772        (-1.55287      1.87688)
R1^2/D10^2  : 1.31078        (-0.656769      1.49462)
kT2 [keV]   : 35.1217        (-6.78172      13.1458)
R2^2/D10^2  : 1.16189E-02    (-0.00715037   0.0120991)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.39 using 59 PHA bins.
# Reduced chi-squared =          1.189 for     55 degrees of freedom 
# Null hypothesis probability =   1.593287e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.146e-07   1.293e-07
25- 50  1.186e-06   2.542e-07
50-150  3.457e-06   1.084e-06
15-150  5.158e-06   1.297e-06

Peak spectrum fit

Power-law model

Time interval is from    2.636 sec. to    3.636 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.61399     ( -0.259185   0.268721 )
Norm@50keV  : 3.29359E-02    ( -0.00641934   0.00641891 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          69.19 using 59 PHA bins.
# Reduced chi-squared =          1.214 for     57 degrees of freedom 
# Null hypothesis probability =   1.291053e-01
 
Photon flux (15-150 keV)    in 1 sec: 4.25106 ( -0.89994  0.90662 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.07553e-07 ( -6.0483e-08  6.04319e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    2.636 sec. to    3.636 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.355736     ( -1.36512   1.07537 )
Epeak [keV] : 83.5174      ( -20.3199 102.783 )
Norm@50keV  : 0.112799    ( -0.112814   0.263376 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.13 using 59 PHA bins.
# Reduced chi-squared =          1.163 for     56 degrees of freedom 
# Null hypothesis probability =   1.889588e-01
 
Photon flux (15-150 keV)    in 1 sec: 4.16381 ( -0.89701  0.9076 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.26979e-07 ( -6.3273e-08  6.32235e-08 ) ergs/cm2

Band function

Time interval is from    2.636 sec. to    3.636 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]    : 19.5629  (-3.71143  4.06277)
R^2/D10^2   : 0.213304  (-0.107913   0.232675)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          69.38 using 59 PHA bins.
# Reduced chi-squared =          1.217 for     57 degrees of freedom 
# Null hypothesis probability =   1.258378e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.587e-08   6.634e-09
25- 50  7.790e-08   2.326e-08
50-150  2.203e-07   6.990e-08
15-150  3.140e-07   9.065e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 189.160       (-87.104      -189.936)
Norm        : 17.9084       (-3.52987     4.21501)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.06 using 59 PHA bins.
# Reduced chi-squared =          1.177 for     57 degrees of freedom 
# Null hypothesis probability =   1.701470e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.489e-08   2.583e-08
25- 50  8.582e-08   4.661e-08
50-150  1.849e-07   1.030e-07
15-150  3.156e-07   1.734e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.70978        (-3.34354      5.59296)
R1^2/D10^2  : 4.13459        (-3.67827      74.6986)
kT2 [keV]   : 23.9280        (-5.05823      8.8906)
R2^2/D10^2  : 8.68063E-02    (-0.0664475   0.168622)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          63.73 using 59 PHA bins.
# Reduced chi-squared =          1.159 for     55 degrees of freedom 
# Null hypothesis probability =   1.962578e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.739e-08   2.259e-08
25- 50  8.495e-08   4.601e-08
50-150  2.141e-07   1.245e-07
15-150  3.364e-07   1.783e-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: 1.29669     ( -0.117622   0.116047 )
Norm@50keV  : 1.68724E-02    ( -0.00112512   0.00112249 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.72 using 59 PHA bins.
# Reduced chi-squared =          1.188 for     57 degrees of freedom 
# Null hypothesis probability =   1.564681e-01
 
Photon flux (15-150 keV)    in 30.5 sec: 2.01169 ( -0.14563  0.146425 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.08932e-06 ( -3.50189e-07  3.50954e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.29260     ( -0.395876   0.178867 )
Epeak [keV] : 9997.21      ( -9997 -9997 )
Norm@50keV  : 1.69446E-02    ( -0.00111804   0.00992 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.72 using 59 PHA bins.
# Reduced chi-squared =          1.209 for     56 degrees of freedom 
# Null hypothesis probability =   1.355513e-01
 
Photon flux (15-150 keV)    in 30.5 sec: 2.00160 ( -0.13804  0.15662 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.0824e-06 ( -3.54806e-07  3.6051e-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)  = 1.13e-06
S(50-100 keV) = 1.84e-06

T90 vs. Hardness ratio plot

T90                                   = 26.527999997139 sec.
Hardness ratio (energy fluence ratio) = 1.62832

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.52181
Count Ratio (50-100 keV) / (15-25 keV) = 1.6295

Mask shadow pattern

IMX = -1.257337098614037E+00, IMY = -3.255414899676689E-01

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000

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:
-575.167400 -560.790000
-239.568000 -11.656000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
303.4253 -53.6021    3.2  40.7   97.6   3.3308   3.7 ------	UNKNOWN                       
300.7638 -71.3548    3.5  32.4   70.9   1.4941   3.3 ------	UNKNOWN                       
  0.7522 -27.1476    4.3  35.4 -177.7   0.7886   2.7 ------	UNKNOWN                       
 35.8211 -43.5053    3.1  18.4 -109.8   0.9759   3.8 ------	UNKNOWN                       
 23.0954 -30.8047    2.5  28.9 -141.8   1.2342   4.7 ------	UNKNOWN                       
 41.9050 -18.4277    3.6  43.8 -116.2   3.0957   3.2 ------	UNKNOWN                       
 38.6717 -16.0963    3.1  45.4 -121.3   3.7004   3.7 ------	UNKNOWN

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

Time interval of the image:
-11.656000 18.840000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
171.3429 -64.0653    2.4  54.2   19.3   1.8188   4.8 ------	UNKNOWN                       
342.6453 -15.4044    0.6  52.4  165.5   7.1944  20.8 ------	UNKNOWN                       
 11.9709 -24.4517    1.9  35.8 -159.7   0.5533   5.9 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
108.732590 429.132610
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
326.2428  38.3948    5.4  56.0 -173.6   2.6642   2.1    5.5	Cyg X-2                       
305.5532  -9.7754    2.3  36.6  116.3   3.4962   5.0 ------	UNKNOWN                       
  5.3764 -67.3107    2.3  54.0   11.3   6.0114   5.0 ------	UNKNOWN                       
351.7474 -26.5644    3.0  14.0  -13.8   0.9744   3.9 ------	UNKNOWN                       
 27.1409 -36.7089    3.3  44.7  -31.0   1.6647   3.5 ------	UNKNOWN                       
 22.3985  -6.3797    3.2  40.0  -76.7   3.4224   3.6 ------	UNKNOWN

Plot creation:
Thu Jun 22 11:32:50 EDT 2017