batgrbproduct analysis for trigger=727610

batgrbproduct Analysis for Trigger=727610

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 Jan  4 17:26:22 EST 2017
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger727610
======================================================================

  Trigger: 00727610      Segment: 000

  BAT Trigger Time: 503915627.584   [s; MET]
      Trigger Stop: 503915629.632   [s; MET]
               UTC: 2016-12-20T08:33:30.249440    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 350.81656549025   Dec: -47.5022510820833  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7
     Image Trigger?:     NO
     Rate S/N Ratio:     11.0453610171873  [ if not an image trigger ]
     Image S/N Ratio:    7

  Flight Position:   [ source = BAT ]
    RA: 350.81656549025   Dec: -47.5022510820833  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 350.858842205059   Dec: -47.4828483504164  [deg; J2000]  
        { 23h 23m 26.1s , -47d 28' 58.3" }
         +/- 1.94025465402919 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.959706663365842 [arcmin] (formal 1-sigma fit error)
    SNR: 11.8002611129105
 
  Angular difference between Flight and Ground position is 2.071930 arcmin
 
  Partial Coding Fraction: 1    [ including projection effects ]

  Duration
     T90: 7.21999996900558 +/- 1.75425425941067
        Measured from: -3.05199998617172
                   to: 4.16799998283386     [s; relative to TRIGTIME]
     T50: 3.5359999537468 +/- 0.812406309563098
        Measured from: -0.61599999666214
                   to: 2.91999995708466     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 2.4200000166893     
                   to: 3.4200000166893     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -3.42799997329712     
                   to: 4.46399998664856     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.149387   0.142029   0.081898   0.008882
           0.017136   0.017565   0.014904   0.013305 [error]
 Peak      0.034670   0.020518   0.015973   0.004675
           0.006309   0.006345   0.005329   0.004735 [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 4.14e-08 5.57e-08 5.52e-08 9.86e-08 1.84e-07 2.50e-07   erg/cm2
              Error 7.31e-09 7.60e-09 1.34e-08 4.64e-08 3.11e-08 6.23e-08   erg/cm2
Peak flux Power-law 2.74e-01 1.86e-01 8.23e-02 5.05e-02 5.67e-01 5.93e-01   ph/cm2/s
              Error 8.77e-02 4.96e-02 4.20e-02 4.91e-02 1.41e-01 1.53e-01   ph/cm2/s
 
Fluence   Cutoff-PL 3.98e-08 6.03e-08 5.30e-08 3.31e-08 1.73e-07 1.86e-07   erg/cm2
              Error 7.89e-09 1.02e-08 1.55e-08 6.45e-08 3.36e-08 7.34e-08   erg/cm2
Peak flux Cutoff-PL 2.74e-01 1.81e-01 8.03e-02 5.68e-02 5.61e-01 5.91e-01   ph/cm2/s
              Error 9.27e-02 8.65e-02 -------- -------- -------- 1.81e-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    2.014    0.252    -      -           2.53e-03 4.52e-04   78.990 57
CPL   1.388    0.924      39.5    0.0      5.95e-03 0.00e+00   77.580 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.174    0.542    -      -           3.47e-03 1.34e-03   73.720 57
CPL   2.181    1.294     273.9    0.0      3.39e-03 0.00e+00   73.700 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100    7.892   -3.428    4.464
T90     7.220   -3.052    4.168
T50     3.536   -0.616    2.920
Peak    1.000    2.420    3.420

Click here for the BAT GCN circular template

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

Special notes of this burst

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  350.8588   -47.4828   0.0161     3.3436  -179.8910         0.3680266     11.800 TRIG_00727610                 
 
Foreground time interval of the image:
 -3.428   4.464 (delta_t =   7.892 [sec])
Background time interval of the image:
-576.183 -559.744 (delta_t =  16.439 [sec])
-239.584  -3.428 (delta_t = 236.156 [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 2.048000

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 2.048000

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 2.048000

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   -3.428 sec. to    4.464 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.01424     ( -0.241764   0.261935 )
Norm@50keV  : 2.52918E-03    ( -0.000457764   0.000445284 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          78.99 using 59 PHA bins.
# Reduced chi-squared =          1.386 for     57 degrees of freedom 
# Null hypothesis probability =   2.856032e-02
 
Photon flux (15-150 keV)    in 7.892 sec: 0.381912 ( -0.05057  0.050572 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.8425e-07 ( -3.05735e-08  3.15928e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -3.428 sec. to    4.464 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.38797     ( -1.09426   0.754358 )
Epeak [keV] : 39.5104      (   )
Norm@50keV  : 5.95041E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          77.58 using 59 PHA bins.
# Reduced chi-squared =          1.385 for     56 degrees of freedom 
# Null hypothesis probability =   2.972149e-02
 
Photon flux (15-150 keV)    in 7.892 sec: 0.374994 ( -0.051105  0.051316 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.72821e-07 ( -3.22144e-08  3.50129e-08 ) ergs/cm2

Band function

Time interval is from   -3.428 sec. to    4.464 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]    : 9.25675  (-1.56961  1.91855)
R^2/D10^2   : 0.238079  (-0.237368   0.247612)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          90.79 using 59 PHA bins.
# Reduced chi-squared =          1.593 for     57 degrees of freedom 
# Null hypothesis probability =   2.948871e-03
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.178e-08   7.198e-09
25- 50  7.055e-08   1.357e-08
50-150  2.931e-08   1.156e-08
15-150  1.316e-07   2.600e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 62.5316       (-20.6951      38.3687)
Norm        : 1.97728       (-0.389085     0.491202)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          77.60 using 59 PHA bins.
# Reduced chi-squared =          1.361 for     57 degrees of freedom 
# Null hypothesis probability =   3.615184e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.947e-08   7.245e-09
25- 50  6.082e-08   9.991e-09
50-150  7.159e-08   2.863e-08
15-150  1.719e-07   3.776e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.16596        (-1.43206      1.6374)
R1^2/D10^2  : 1.56484        (-0.99908      4.10094)
kT2 [keV]   : 17.6369        (-4.69371      8.35473)
R2^2/D10^2  : 1.46809E-02    (-0.0113268   0.0232885)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          75.46 using 59 PHA bins.
# Reduced chi-squared =          1.372 for     55 degrees of freedom 
# Null hypothesis probability =   3.494570e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.143e-08   2.271e-08
25- 50  5.723e-08   2.854e-08
50-150  7.541e-08   4.522e-08
15-150  1.741e-07   9.076e-08

Peak spectrum fit

Power-law model

Time interval is from    2.420 sec. to    3.420 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.17406     ( -0.488602   0.595524 )
Norm@50keV  : 3.47182E-03    ( -0.00138059   0.00130721 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          73.72 using 59 PHA bins.
# Reduced chi-squared =          1.293 for     57 degrees of freedom 
# Null hypothesis probability =   6.739804e-02
 
Photon flux (15-150 keV)    in 1 sec: 0.567101 ( -0.140719  0.14086 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.25349e-08 ( -1.05649e-08  1.14071e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    2.420 sec. to    3.420 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.18098     ( -1.58849   1.00007 )
Epeak [keV] : 273.931      (   )
Norm@50keV  : 3.39289E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          73.70 using 59 PHA bins.
# Reduced chi-squared =          1.316 for     56 degrees of freedom 
# Null hypothesis probability =   5.653754e-02
 
Photon flux (15-150 keV)    in 1 sec: 0.560628 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

Band function

Time interval is from    2.420 sec. to    3.420 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]    : 6.22105  (-1.7128  2.90007)
R^2/D10^2   : 1.64724  (-1.6404   4.90481)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          79.35 using 59 PHA bins.
# Reduced chi-squared =          1.392 for     57 degrees of freedom 
# Null hypothesis probability =   2.681260e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.906e-09   5.410e-09
25- 50  9.600e-09   5.786e-09
50-150  1.017e-09   8.985e-10
15-150  1.952e-08   1.216e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 48.5729       (-27.539      98.6681)
Norm        : 3.25045       (-1.2255     2.83274)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          74.90 using 59 PHA bins.
# Reduced chi-squared =          1.314 for     57 degrees of freedom 
# Null hypothesis probability =   5.605488e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.894e-09   2.739e-09
25- 50  1.122e-08   5.459e-09
50-150  1.060e-08   7.468e-09
15-150  2.971e-08   1.462e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 4.66341        (-1.4802      1.95166)
R1^2/D10^2  : 4.67159        (-3.60069      22.5109)
kT2 [keV]   : 23.3562        (-10.6126      55.9149)
R2^2/D10^2  : 7.62829E-03    (-0.00739804   0.0432295)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          71.78 using 59 PHA bins.
# Reduced chi-squared =          1.305 for     55 degrees of freedom 
# Null hypothesis probability =   6.387274e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.273e-09   5.180e-09
25- 50  8.765e-09   4.921e-09
50-150  1.681e-08   1.102e-08
15-150  3.485e-08   2.042e-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: 2.01424     ( -0.241764   0.261935 )
Norm@50keV  : 2.52918E-03    ( -0.000457764   0.000445284 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          78.99 using 59 PHA bins.
# Reduced chi-squared =          1.386 for     57 degrees of freedom 
# Null hypothesis probability =   2.856032e-02
 
Photon flux (15-150 keV)    in 7.892 sec: 0.381883 ( -0.0505664  0.0505682 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.84217e-07 ( -3.0547e-08  3.16049e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.38798     ( -1.09426   0.754599 )
Epeak [keV] : 39.5104      (   )
Norm@50keV  : 5.95038E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          77.58 using 59 PHA bins.
# Reduced chi-squared =          1.385 for     56 degrees of freedom 
# Null hypothesis probability =   2.972149e-02
 
Photon flux (15-150 keV)    in 7.892 sec: 0.374916 ( -0.051095  0.051296 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.72858e-07 ( -3.2223e-08  3.50578e-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)  = 5.57e-08
S(50-100 keV) = 5.52e-08

T90 vs. Hardness ratio plot

T90                                   = 7.21999996900558 sec.
Hardness ratio (energy fluence ratio) = 0.991023

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 0.950745
Count Ratio (50-100 keV) / (15-25 keV) = 0.548227

Mask shadow pattern

IMX = -5.842229921328191E-02, IMY = 1.111033683784135E-04

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 2.048000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 2.048000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 2.048000

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:
-576.183400 -559.744000
-239.584000 -3.428000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
359.3279   7.1626    2.7  52.2   29.5   5.4665   4.3  431.6	UNKNOWN                       
 77.1081 -60.3212    2.6  51.6  157.9   4.2755   4.4 ------	UNKNOWN                       
 18.1142 -38.5543    2.7  22.1  102.1   1.1505   4.2 ------	UNKNOWN                       
343.3834   5.2701    2.6  49.9    9.2   2.4794   4.4 ------	UNKNOWN                       
313.0101   3.8337    2.4  58.1  -27.2   7.4635   4.8 ------	UNKNOWN                       
305.6220 -10.3598    4.0  50.7  -44.6   3.5451   2.9 ------	UNKNOWN

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

Time interval of the image:
-3.428000 4.464000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
  1.2577 -34.0501    2.2  13.7   62.8   0.1704   5.3 ------	UNKNOWN                       
350.8588 -47.4829    1.0   3.3 -179.9   0.3681  11.8 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
56.716590 97.366000
98.416000 962.483600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 22.0403 -23.0114    3.7  34.9   67.6   4.2215   3.1 ------	UNKNOWN                       
352.8748  -7.6631    3.1  39.9   14.3   2.8734   3.7 ------	UNKNOWN                       
357.7353 -29.8542    2.7  18.4   30.4   2.1623   4.2 ------	UNKNOWN                       
341.4895   7.2342    2.9  55.3   -0.2   8.0950   3.9 ------	UNKNOWN                       
324.0279  -9.2389    2.5  44.5  -28.4   4.6382   4.7 ------	UNKNOWN                       
213.5274 -71.4788    4.0  57.2 -154.1  12.5427   2.9 ------	UNKNOWN                       
310.4142  -9.9585    4.8  50.6  -44.6   8.1130   2.4 ------	UNKNOWN

Plot creation:
Thu Jan  5 10:34:57 EST 2017