batgrbproduct analysis for trigger=982707

batgrbproduct Analysis for Trigger=982707

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 v2.48
    Process Start Time (local time): Wed Sep  9 22:57:35 EDT 2020
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger982707
======================================================================

  Trigger: 00982707      Segment: 000

  BAT Trigger Time: 616633086.72   [s; MET]
      Trigger Stop: 616633086.976   [s; MET]
               UTC: 2020-07-16T22:57:41.424000    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 196.012971445604   Dec: 29.6298658681777  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    18.06
     Image Trigger?:     NO
     Rate S/N Ratio:     178.566514218092  [ if not an image trigger ]
     Image S/N Ratio:    18.06

  Flight Position:   [ source = BAT ]
    RA: 196.012971445604   Dec: 29.6298658681777  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 196.01172944903   Dec: 29.6377359412712  [deg; J2000]  
        { 13h 04m 02.8s , +29d 38' 15.8" }
         +/- 0.8325876795938 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.307771559773814 [arcmin] (formal 1-sigma fit error)
    SNR: 39.5175341337259
 
  Angular difference between Flight and Ground position is 0.476626 arcmin
 
  Partial Coding Fraction: 0.5703125    [ including projection effects ]

  Duration
     T90: 86.5719999074936 +/- 15.1708020454952
        Measured from: -0.0360000133514404
                   to: 86.5359998941422     [s; relative to TRIGTIME]
     T50: 27.3919999599457 +/- 4.82238102160904
        Measured from: 0.635999917984009
                   to: 28.0279998779297     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.180000066757202     
                   to: 0.819999933242798     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.420000076293945     
                   to: 112.631999969482     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.673209   2.200893   1.517843   0.325384
           0.081999   0.086060   0.075962   0.066839 [error]
 Peak      0.232056   0.442855   0.509601   0.189416
           0.014694   0.018280   0.019336   0.015318 [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 9.25e-07 1.20e-06 3.16e-06 3.53e-06 5.82e-06   erg/cm2
              Error 4.46e-08 4.47e-08 7.64e-08 4.38e-07 1.80e-07 4.93e-07   erg/cm2
Peak flux Power-law 9.00e-04 9.72e-03 1.08e-01 1.08e+01 4.81e-01 8.93e+00   ph/cm2/s
              Error -------- -------- -------- -------- -------- --------   ph/cm2/s
 
Fluence   Cutoff-PL 5.38e-07 9.30e-07 1.20e-06 2.90e-06 3.52e-06 5.58e-06   erg/cm2
              Error 4.31e-08 5.05e-08 7.90e-08 7.39e-07 1.98e-07 7.78e-07   erg/cm2
Peak flux Cutoff-PL 2.24e+00 3.24e+00 3.33e+00 5.11e+00 1.07e+01 1.39e+01   ph/cm2/s
              Error 2.58e-01 1.82e-01 1.90e-01 1.17e+00 4.78e-01 1.31e+00   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    1.624    0.086    -      -           3.35e-03 1.59e-04   34.110 57
CPL   1.572    0.231     374.7    0.0      3.56e-03 9.78e-04   34.070 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.977    0.075    -      -           9.35e-02 4.01e-03   57.520 57
CPL   0.816    0.254     428.3    0.0      1.10e-01 2.81e-02   56.540 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: 5.440000 sec.
T50 in the 50-300 keV band: 2.048000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  113.052   -0.420  112.632
T90    86.572   -0.036   86.536
T50    27.392    0.636   28.028
Peak    1.000   -0.180    0.820

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
  196.0117    29.6377   0.0049    33.9022   161.3656         3.9504168     39.518 TRIG_00982707                 
 
Foreground time interval of the image:
 -0.420  17.381 (delta_t =  17.801 [sec])
Background time interval of the image:
-239.720  -0.420 (delta_t = 239.300 [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 0.256000

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 0.256000

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 0.256000

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   -0.420 sec. to  112.632 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.62401     ( -0.0861124   0.0866432 )
Norm@50keV  : 3.34883E-03    ( -0.000159514   0.000158961 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   34.11     using 59 bins.
 Reduced chi-squared = 0.598421
# Null hypothesis probability of 9.93e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 113.1 sec: 0.433617 ( -0.020792  0.020851 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.53275e-06 ( -1.79676e-07  1.80661e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.420 sec. to  112.632 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.57159     ( -0.329995   0.131591 )
Epeak [keV] : 374.703      ( -420.529 -420.529 )
Norm@50keV  : 3.55972E-03    ( -0.00035084   0.00160576 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   34.07     using 59 bins.
 Reduced chi-squared = 0.608393
# Null hypothesis probability of 9.91e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 113.1 sec: 0.432321 ( -0.022138  0.0167 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.51716e-06 ( -2.04077e-07  1.924e-07 ) ergs/cm2

Band function

Time interval is from   -0.420 sec. to  112.632 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]    : 13.8693  (  )
R^2/D10^2   : 6.07782E-02  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                  158.03     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 1.97e-11 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.795e-07   2.550e-08
25- 50  1.030e-06   6.057e-08
50-150  1.298e-06   1.250e-07
15-150  2.608e-06   1.566e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 172.511       (-38.242      -172.386)
Norm        : 1.75619       (-0.0913656     0.100843)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   36.29     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 9.85e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.033e-07   3.540e-08
25- 50  9.510e-07   1.042e-07
50-150  1.983e-06   6.046e-07
15-150  3.437e-06   7.272e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.16117        (-0.969486      1.03942)
R1^2/D10^2  : 0.465912        (-0.171359      0.311957)
kT2 [keV]   : 28.8052        (-4.75933      7.55355)
R2^2/D10^2  : 3.57998E-03    (-0.00192468   0.0032455)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   34.70     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 9.85e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.981e-07   7.137e-08
25- 50  9.622e-07   9.642e-08
50-150  2.057e-06   4.411e-07
15-150  3.518e-06   5.084e-07

Peak spectrum fit

Power-law model

Time interval is from   -0.180 sec. to    0.820 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.976735     ( -0.0749161   0.0741708 )
Norm@50keV  : 9.34696E-02    ( -0.00401031   0.00400198 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   57.52     using 59 bins.
 Reduced chi-squared = 1.00912
# Null hypothesis probability of 4.56e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 0.480692 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.01932e-06 ( -4.76026e-08  4.77183e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.180 sec. to    0.820 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.816047     ( -0.291802   0.215316 )
Epeak [keV] : 428.292      ( -428.292 -428.292 )
Norm@50keV  : 0.110176    ( -0.0193031   0.0368469 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   56.54     using 59 bins.
 Reduced chi-squared = 1.00964
# Null hypothesis probability of 4.55e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 10.6894 ( -0.4778  0.4779 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.01284e-06 ( -4.93438e-08  4.9149e-08 ) ergs/cm2

Band function

Time interval is from   -0.180 sec. to    0.820 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]    : 22.7549  (  )
R^2/D10^2   : 0.349369  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                  153.56     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 8.48e-11 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.295e-08   2.975e-09
25- 50  1.777e-07   1.150e-08
50-150  6.875e-07   4.615e-08
15-150  8.982e-07   4.925e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (      )
Norm        : 43.1032       (     )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                  214.61     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 4.05e-20 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.073e-07   5.300e-09
25- 50  2.065e-07   9.650e-09
50-150  4.528e-07   2.450e-08
15-150  7.666e-07   3.940e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 8.46885        (-1.401      1.6935)
R1^2/D10^2  : 4.14902        (-1.70135      3.14895)
kT2 [keV]   : 36.9354        (-5.22642      8.7485)
R2^2/D10^2  : 6.83028E-02    (-0.0319775   0.041987)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   53.75     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 5.23e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.867e-08   1.214e-08
25- 50  1.925e-07   2.760e-08
50-150  7.646e-07   1.281e-07
15-150  1.026e-06   1.450e-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: 1.28317     ( -0.0691434   0.0687631 )
Norm@50keV  : 1.48640E-02    ( -0.000564161   0.000564108 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   58.22     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 4.30e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 17.8 sec: 1.76793 ( -0.071177  0.0713027 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.62541e-06 ( -1.07765e-07  1.08018e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.16343     ( -0.268058   0.15905 )
Epeak [keV] : 380.923      ( -381.831 -381.831 )
Norm@50keV  : 1.69113E-02    ( -0.00246679   0.00546777 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   57.58     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 4.17e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 17.8 sec: 1.75672 ( -0.07478  0.07473 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.60693e-06 ( -1.16465e-07  1.1513e-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)  = 9.25e-07
S(50-100 keV) = 1.20e-06

T90 vs. Hardness ratio plot

T90                                   = 86.5719999074936 sec.
Hardness ratio (energy fluence ratio) = 1.2973

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.31537
Count Ratio (50-100 keV) / (15-25 keV) = 0.907145

Mask shadow pattern

IMX = -6.367983277053566E-01, IMY = -2.147321580813681E-01

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.256000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.256000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.256000

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:
-239.720000 -0.420000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
291.4881  62.0342    3.0  46.5   46.0   4.0323   3.9 ------	UNKNOWN                       
323.4578  72.1868    3.1  44.2   24.1   1.8650   3.8 ------	UNKNOWN                       
123.0469  45.3536    2.4  35.3  -81.6   3.0183   4.8 ------	UNKNOWN                       
 62.3918  53.7926    2.8  54.2  -31.4   6.0072   4.2 ------	UNKNOWN                       
144.1225  22.2499    2.2  45.7 -123.8   6.1336   5.3 ------	UNKNOWN                       
102.9108  46.9453    2.9  43.6  -63.8   4.6314   3.9 ------	UNKNOWN                       
 99.0528  47.6366    2.5  44.9  -60.3   6.0301   4.6 ------	UNKNOWN

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

Time interval of the image:
-0.420000 17.380600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
304.2602  61.6525    2.5  50.2   39.6   1.5856   4.6 ------	UNKNOWN                       
196.0117  29.6377    0.3  33.9  161.4   3.9505  39.5 ------	UNKNOWN                       
189.8459  30.5745    2.7  31.8  170.6   0.3608   4.2 ------	UNKNOWN                       
 12.7054  62.7089    2.7  55.3    1.6   1.2121   4.3 ------	UNKNOWN                       
140.1057  43.6767    2.7  28.6 -101.2   0.4691   4.3 ------	UNKNOWN                       
 94.2878  48.7931    2.4  46.1  -55.9   1.4045   4.9 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
71.980590 962.413500
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
238.8816  27.6339    3.0  37.5   68.5   6.2237   3.9 ------	UNKNOWN                       
160.6311  69.5664    3.3  44.7  -30.4   4.9619   3.5 ------	UNKNOWN                       
163.1568   1.3278    3.1  42.2 -139.8   5.5827   3.7 ------	UNKNOWN                       
161.2461  24.3754    3.9  31.3 -105.0   5.0908   4.2 ------	UNKNOWN                       
160.9311  24.4137    4.0  31.6 -104.7   5.7013   4.7 ------	UNKNOWN                       
153.3352   9.0991    3.5  44.8 -122.0  10.5208   3.3 ------	UNKNOWN                       
152.0554  13.1332    2.4  43.8 -116.2  17.0777   4.7 ------	UNKNOWN                       
153.7654   3.0919    2.9  48.0 -129.1  16.0100   4.0 ------	UNKNOWN                       
142.3368  50.5503    3.5  44.8  -60.3  12.4663   3.3 ------	UNKNOWN

Plot creation:
Mon Nov 16 12:40:51 EST 2020