batgrbproduct analysis for trigger=761622

batgrbproduct Analysis for Trigger=761622

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 Aug  2 14:55:19 EDT 2017
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger761622
======================================================================

  Trigger: 00761622      Segment: 000

  BAT Trigger Time: 521504444.736   [s; MET]
      Trigger Stop: 521504445.76   [s; MET]
               UTC: 2017-07-11T22:20:25.381520    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 45.7863907537336   Dec: 47.8503120698934  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    21.47
     Image Trigger?:     NO
     Rate S/N Ratio:     72.5396443332885  [ if not an image trigger ]
     Image S/N Ratio:    21.47

  Flight Position:   [ source = BAT ]
    RA: 45.7863907537336   Dec: 47.8503120698934  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 45.7782068199629   Dec: 47.8444333310706  [deg; J2000]  
        { 03h 03m 06.8s , +47d 50' 40.0" }
         +/- 0.992093265132614 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.335960524200672 [arcmin] (formal 1-sigma fit error)
    SNR: 30.7640407509617
 
  Angular difference between Flight and Ground position is 0.482711 arcmin
 
  Partial Coding Fraction: 1.015625    [ including projection effects ]

  Duration
     T90: 31.2119999527931 +/- 7.39057671365112
        Measured from: -22.160000026226
                   to: 9.05199992656708     [s; relative to TRIGTIME]
     T50: 3.24799996614456 +/- 0.509886220615425
        Measured from: -0.00400000810623169
                   to: 3.24399995803833     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.0239999890327454     
                   to: 1.02399998903275     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -31.6240000128746     
                   to: 15.3679999709129     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.812235   0.987042   0.587895   0.115921
           0.038617   0.040534   0.035515   0.031591 [error]
 Peak      0.170075   0.230979   0.161932   0.023762
           0.008043   0.008818   0.007702   0.005455 [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 2.42e-07 3.84e-07 4.60e-07 1.07e-06 1.40e-06 2.16e-06   erg/cm2
              Error 2.01e-08 1.94e-08 3.49e-08 1.72e-07 8.04e-08 2.01e-07   erg/cm2
Peak flux Power-law 1.68e+00 1.59e+00 1.05e+00 1.07e+00 4.75e+00 5.38e+00   ph/cm2/s
              Error 1.32e-01 7.65e-02 6.27e-02 1.31e-01 2.22e-01 2.45e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.33e-07 3.96e-07 4.61e-07 6.53e-07 1.35e-06 1.74e-06   erg/cm2
              Error 2.34e-08 2.46e-08 3.65e-08 3.80e-07 9.74e-08 4.02e-07   erg/cm2
Peak flux Cutoff-PL 1.53e+00 1.66e+00 1.08e+00 6.26e-01 4.63e+00 4.90e+00   ph/cm2/s
              Error 1.60e-01 8.97e-02 7.00e-02 2.18e-01 2.34e-01 3.27e-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    1.741    0.095    -      -           3.22e-03 1.77e-04   59.810 57
CPL   1.452    0.370      87.0  -29.7      4.60e-03 2.22e-03   58.070 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.604    0.081    -      -           3.69e-02 1.74e-03   47.940 57
CPL   1.110    0.336      89.9   45.7      6.55e-02 2.59e-02   40.880 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: 8.960000 sec.
T50 in the 50-300 keV band: 2.624000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   46.992  -31.624   15.368
T90    31.212  -22.160    9.052
T50     3.248   -0.004    3.244
Peak    1.000    0.024    1.024

Click here for the BAT GCN circular template

Special notes of this burst

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
   45.7782    47.8444   0.0062    11.7746   -11.3354         2.5345158     30.764 TRIG_00761622                 
 
Foreground time interval of the image:
-31.624  15.165 (delta_t =  46.789 [sec])
Background time interval of the image:
-239.736 -31.624 (delta_t = 208.112 [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 1.024000

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 1.024000

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 1.024000

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  -31.624 sec. to   15.368 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.74123     ( -0.0945525   0.0958005 )
Norm@50keV  : 3.22014E-03    ( -0.000177488   0.000176148 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.81 using 59 PHA bins.
# Reduced chi-squared =          1.049 for     57 degrees of freedom 
# Null hypothesis probability =   3.741059e-01
 
Photon flux (15-150 keV)    in 46.99 sec: 0.434038 ( -0.022115  0.022141 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.39716e-06 ( -8.00686e-08  8.08111e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from  -31.624 sec. to   15.368 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.45153     ( -0.409521   0.331459 )
Epeak [keV] : 86.9568      ( -27.5153 -86.96 )
Norm@50keV  : 4.60164E-03    ( -0.0014838   0.00295826 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.07 using 59 PHA bins.
# Reduced chi-squared =          1.037 for     56 degrees of freedom 
# Null hypothesis probability =   3.988830e-01
 
Photon flux (15-150 keV)    in 46.99 sec: 0.426725 ( -0.024008  0.023963 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.35358e-06 ( -9.72496e-08  9.75423e-08 ) ergs/cm2

Band function

Time interval is from  -31.624 sec. to   15.368 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]    : 12.0781  (  )
R^2/D10^2   : 9.90837E-02  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         137.80 using 59 PHA bins.
# Reduced chi-squared =         2.4176 for     57 degrees of freedom 
# Null hypothesis probability =   1.213863e-08
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.437e-07   1.330e-08
25- 50  4.558e-07   2.512e-08
50-150  4.015e-07   4.899e-08
15-150  1.001e-06   5.733e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 118.029       (-24.4779      32.1922)
Norm        : 1.83274       (-0.119625     0.145638)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.44 using 59 PHA bins.
# Reduced chi-squared =          1.025 for     57 degrees of freedom 
# Null hypothesis probability =   4.224032e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.245e-07   1.715e-08
25- 50  4.004e-07   2.953e-08
50-150  7.087e-07   2.065e-07
15-150  1.334e-06   2.248e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.94481        (-1.12452      1.21783)
R1^2/D10^2  : 0.532631        (-0.215631      0.43391)
kT2 [keV]   : 24.8508        (-4.95518      9.45124)
R2^2/D10^2  : 5.17074E-03    (-0.0034964   0.00701445)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.93 using 59 PHA bins.
# Reduced chi-squared =          1.071 for     55 degrees of freedom 
# Null hypothesis probability =   3.339545e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.185e-07   3.137e-08
25- 50  4.073e-07   5.463e-08
50-150  7.196e-07   2.385e-07
15-150  1.345e-06   3.057e-07

Peak spectrum fit

Power-law model

Time interval is from    0.024 sec. to    1.024 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.60385     ( -0.0804759   0.0812116 )
Norm@50keV  : 3.69465E-02    ( -0.00174194   0.00173616 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.94 using 59 PHA bins.
# Reduced chi-squared =         0.8410 for     57 degrees of freedom 
# Null hypothesis probability =   7.981055e-01
 
Photon flux (15-150 keV)    in 1 sec: 4.75364 ( -0.22162  0.22188 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.45414e-07 ( -1.74471e-08  1.75387e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.024 sec. to    1.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.11032     ( -0.348155   0.323267 )
Epeak [keV] : 89.8663      ( -18.8944 72.5026 )
Norm@50keV  : 6.55137E-02    ( -0.0200511   0.0317385 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          40.88 using 59 PHA bins.
# Reduced chi-squared =         0.7300 for     56 degrees of freedom 
# Null hypothesis probability =   9.354556e-01
 
Photon flux (15-150 keV)    in 1 sec: 4.63325 ( -0.23428  0.23441 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.32767e-07 ( -1.93302e-08  1.93605e-08 ) ergs/cm2

Band function

Time interval is from    0.024 sec. to    1.024 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]    : 14.3835  (  )
R^2/D10^2   : 0.607779  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         133.54 using 59 PHA bins.
# Reduced chi-squared =         2.3428 for     57 degrees of freedom 
# Null hypothesis probability =   4.391867e-08
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.648e-08   2.510e-09
25- 50  1.011e-07   6.140e-09
50-150  1.397e-07   1.295e-08
15-150  2.673e-07   1.440e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 171.723       (-35.6653      -171.69)
Norm        : 19.4403       (-0.975126     1.04711)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          41.50 using 59 PHA bins.
# Reduced chi-squared =         0.7281 for     57 degrees of freedom 
# Null hypothesis probability =   9.388235e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.928e-08   3.290e-09
25- 50  9.307e-08   1.006e-08
50-150  1.937e-07   6.036e-08
15-150  3.361e-07   7.390e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.31580        (-0.971243      1.11644)
R1^2/D10^2  : 6.75229        (-2.8677      5.66722)
kT2 [keV]   : 22.2572        (-2.57579      3.6333)
R2^2/D10^2  : 0.102339    (-0.0453174   0.0632983)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          39.28 using 59 PHA bins.
# Reduced chi-squared =         0.7142 for     55 degrees of freedom 
# Null hypothesis probability =   9.459040e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.772e-08   7.245e-09
25- 50  9.240e-08   1.130e-08
50-150  1.887e-07   3.260e-08
15-150  3.288e-07   4.635e-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: 1.74313     ( -0.0951709   0.0964429 )
Norm@50keV  : 3.21297E-03    ( -0.000177995   0.000176627 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.10 using 59 PHA bins.
# Reduced chi-squared =          1.037 for     57 degrees of freedom 
# Null hypothesis probability =   3.986441e-01
 
Photon flux (15-150 keV)    in 46.79 sec: 0.433353 ( -0.0221738  0.0222008 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.38776e-06 ( -7.99515e-08  8.06267e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.47667     ( -0.407062   0.312656 )
Epeak [keV] : 90.3438      ( -30.3307 -90.3463 )
Norm@50keV  : 4.46036E-03    ( -0.00164035   0.00283813 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.63 using 59 PHA bins.
# Reduced chi-squared =          1.029 for     56 degrees of freedom 
# Null hypothesis probability =   4.148858e-01
 
Photon flux (15-150 keV)    in 46.79 sec: 0.426546 ( -0.024051  0.023965 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.34859e-06 ( -9.69348e-08  9.70705e-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)  = 3.84e-07
S(50-100 keV) = 4.60e-07

T90 vs. Hardness ratio plot

T90                                   = 31.2119999527931 sec.
Hardness ratio (energy fluence ratio) = 1.19792

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.21522
Count Ratio (50-100 keV) / (15-25 keV) = 0.723799

Mask shadow pattern

IMX = 2.043826944350535E-01, IMY = 4.097110840777380E-02

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000

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:
-239.736000 -31.624000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 44.2471   5.5460    2.3  53.8    0.9   2.6232   5.0 ------	UNKNOWN                       
 61.0091  65.4388    2.7  11.1 -127.1   0.7553   4.3 ------	UNKNOWN                       
 94.4951  70.6024    2.3  24.3 -134.4   0.9355   5.1 ------	UNKNOWN                       
129.8537  54.6586    2.0  45.1 -120.2   4.6226   5.9 ------	UNKNOWN                       
130.4637  54.7799    2.9  45.2 -120.6   3.5288   4.7 ------	UNKNOWN

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

Time interval of the image:
-31.624000 15.164600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 45.7782  47.8444    0.4  11.8  -11.3   2.5345  30.8 ------	UNKNOWN                       
201.1590  83.5246    2.1  36.9 -171.3   0.6173   5.6 ------	UNKNOWN                       
 97.5774  70.5790    2.5  25.3 -134.4   0.4205   4.6 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
47.564600 962.337800
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6246  22.0166    0.5  39.7  -64.9  37.3057  23.8    0.5	Crab                          
 34.9225  40.9793    2.4  10.3   50.4   2.4637   4.8 ------	UNKNOWN                       
221.9694  75.1921    3.1  56.9  179.2  13.8393   3.8 ------	UNKNOWN                       
 48.3945  26.2094    3.1  21.7   -8.4   2.0603   3.8 ------	UNKNOWN                       
 70.9823   1.6539    2.3  51.1  -35.2   8.3210   4.9 ------	UNKNOWN

Plot creation:
Wed Aug  2 18:50:05 EDT 2017