batgrbproduct analysis for trigger=912310

batgrbproduct Analysis for Trigger=912310

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): Tue Jul 30 17:51:12 EDT 2019
             Host Name: bat3
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger912310
======================================================================

  Trigger: 00912310      Segment: 000

  BAT Trigger Time: 583667144   [s; MET]
      Trigger Stop: 583667208   [s; MET]
               UTC: 2019-07-01T09:45:20.833660    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 28.0627118270664   Dec: 58.9063378051181  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.19
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    7.19

  Flight Position:   [ source = BAT ]
    RA: 28.0627118270664   Dec: 58.9063378051181  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 28.1312176098513   Dec: 58.8991373797762  [deg; J2000]  
        { 01h 52m 31.5s , +58d 53' 56.9" }
         +/- 2.38853371059077 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.37181431067582 [arcmin] (formal 1-sigma fit error)
    SNR: 8.76860892657775
 
  Angular difference between Flight and Ground position is 2.166476 arcmin
 
  Partial Coding Fraction: 0.5234375    [ including projection effects ]

  Duration
     T90: 52.432000041008 +/- 4.0175614563681
        Measured from: 35.9119999408722
                   to: 88.3439999818802     [s; relative to TRIGTIME]
     T50: 43.3120000362396 +/- 31.9806100860231
        Measured from: 39.4479999542236
                   to: 82.7599999904633     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 37.9160000085831     
                   to: 38.9160000085831     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 35.0160000324249     
                   to: 89.9919999837875     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.540434   0.586785   0.373185  -0.049720
           0.074872   0.076066   0.065561   0.057532 [error]
 Peak      0.038172   0.067429   0.026761   0.004603
           0.011351   0.011835   0.009959   0.008012 [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 1.76e-07 2.52e-07 2.70e-07 5.36e-07 8.63e-07 1.23e-06   erg/cm2
              Error 3.64e-08 3.57e-08 6.46e-08 2.59e-07 1.48e-07 3.26e-07   erg/cm2
Peak flux Power-law 4.55e-01 3.94e-01 2.34e-01 2.08e-01 1.17e+00 1.29e+00   ph/cm2/s
              Error 1.63e-01 9.46e-02 7.95e-02 1.39e-01 2.81e-01 3.10e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.74e-07 2.56e-07 2.70e-07 4.34e-07 8.58e-07 1.13e-06   erg/cm2
              Error 3.95e-08 4.33e-08 6.56e-08 2.50e-07 1.53e-07 3.51e-07   erg/cm2
Peak flux Cutoff-PL 4.31e-01 4.31e-01 2.31e-01 8.11e-02 1.15e+00 1.17e+00   ph/cm2/s
              Error 1.81e-01 1.53e-01 -------- 1.23e-01 2.94e-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    1.904    0.271    -      -           1.71e-03 2.97e-04   59.310 57
CPL   1.793    0.852      81.7   -0.0      1.98e-03 4.05e-03   59.270 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.753    0.415    -      -           8.66e-03 2.31e-03   48.650 57
CPL   1.093    2.991      57.0    0.0      2.11e-02 0.00e+00   48.280 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   54.976   35.016   89.992
T90    52.432   35.912   88.344
T50    43.312   39.448   82.760
Peak    1.000   37.916   38.916

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
   28.1312    58.8991   0.0219    32.3469   -67.4961         1.0321845      8.769 TRIG_00912310                 
 
Foreground time interval of the image:
 35.016  73.101 (delta_t =  38.085 [sec])
Background time interval of the image:
-239.000  35.016 (delta_t = 274.016 [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   35.016 sec. to   89.992 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.90444     ( -0.261448   0.279651 )
Norm@50keV  : 1.70957E-03    ( -0.000302451   0.00029196 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.31 using 59 PHA bins.
# Reduced chi-squared =          1.041 for     57 degrees of freedom 
# Null hypothesis probability =   3.913477e-01
 
Photon flux (15-150 keV)    in 54.98 sec: 0.245821 ( -0.034867  0.034881 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.64319e-07 ( -1.46566e-07  1.50117e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from   35.016 sec. to   89.992 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.79290     ( -1.0983   0.605017 )
Epeak [keV] : 81.6703      ( -81.6277 -81.6432 )
Norm@50keV  : 1.97523E-03    ( -0.00197545   0.00612922 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.27 using 59 PHA bins.
# Reduced chi-squared =          1.058 for     56 degrees of freedom 
# Null hypothesis probability =   3.572749e-01
 
Photon flux (15-150 keV)    in 54.98 sec: 0.244801 ( -0.035889  0.035612 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.55016e-07 ( -1.63942e-07  1.41547e-07 ) ergs/cm2

Band function

Time interval is from   35.016 sec. to   89.992 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]    : 10.5748  (-1.80413  2.24482)
R^2/D10^2   : 9.15958E-02  (-0.0471563   0.0942374)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          73.30 using 59 PHA bins.
# Reduced chi-squared =          1.286 for     57 degrees of freedom 
# Null hypothesis probability =   7.174605e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.166e-07   3.464e-08
25- 50  3.131e-07   6.675e-08
50-150  1.917e-07   7.472e-08
15-150  6.214e-07   1.351e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 82.8340       (-31.9411      74.7117)
Norm        : 1.13716       (-0.224695     0.299168)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.92 using 59 PHA bins.
# Reduced chi-squared =          1.051 for     57 degrees of freedom 
# Null hypothesis probability =   3.702537e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.626e-07   3.139e-08
25- 50  2.698e-07   4.734e-08
50-150  3.898e-07   2.357e-07
15-150  8.222e-07   2.320e-07

Double BB

------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 4.84647        (-2.29652      3.97574)
R1^2/D10^2  : 1.22131        (-1.03741      46.7812)
kT2 [keV]   : 18.6200        (-13.0137      29.7545)
R2^2/D10^2  : 8.67311E-03    (-0.00757722   0.0120721)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.91 using 59 PHA bins.
#Fit statistic : Chi-Squared =          60.89 using 59 PHA bins.
# Reduced chi-squared =          1.107 for     55 degrees of freedom 
# Reduced chi-squared =          1.107 for     55 degrees of freedom 
# Null hypothesis probability =   2.717854e-01
# Null hypothesis probability =   2.723510e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.776e-07   9.715e-08
25- 50  2.402e-07   1.257e-07
50-150  3.876e-07   2.316e-07
15-150  8.054e-07   4.326e-07

Peak spectrum fit

Power-law model

Time interval is from   37.916 sec. to   38.916 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.75295     ( -0.405511   0.425256 )
Norm@50keV  : 8.66280E-03    ( -0.00234495   0.00227051 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.65 using 59 PHA bins.
# Reduced chi-squared =         0.8535 for     57 degrees of freedom 
# Null hypothesis probability =   7.766305e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.17269 ( -0.280722  0.28101 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.99337e-08 ( -2.16738e-08  2.2372e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   37.916 sec. to   38.916 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.09293     ( -4.67375   1.30739 )
Epeak [keV] : 57.0211      (   )
Norm@50keV  : 2.10883E-02    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.28 using 59 PHA bins.
# Reduced chi-squared =         0.8621 for     56 degrees of freedom 
# Null hypothesis probability =   7.587077e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.14867 ( -0.299354  0.28955 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.3731e-08 ( -2.73628e-08  2.65642e-08 ) ergs/cm2

Band function

Time interval is from   37.916 sec. to   38.916 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]    : 10.2142  (-2.17858  3.15965)
R^2/D10^2   : 0.533529  (-0.346009   0.803534)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.65 using 59 PHA bins.
# Reduced chi-squared =         0.8710 for     57 degrees of freedom 
# Null hypothesis probability =   7.445076e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.141e-08   5.617e-09
25- 50  2.923e-08   1.357e-08
50-150  1.622e-08   9.984e-09
15-150  5.687e-08   2.101e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 99.9996       (-54.8453      -100.006)
Norm        : 5.23383       (-1.48978     2.2654)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.28 using 59 PHA bins.
# Reduced chi-squared =         0.8470 for     57 degrees of freedom 
# Null hypothesis probability =   7.879562e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.368e-08   6.623e-09
25- 50  2.365e-08   1.327e-08
50-150  3.833e-08   2.969e-08
15-150  7.567e-08   4.835e-08

Double BB

------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 8.79275        (-2.72239      2.9394)
R1^2/D10^2  : 0.843161        (-0.433606      1.92939)
kT2 [keV]   : 76.7631        (-59.5965      -74.1336)
R2^2/D10^2  : 5.14530E-04    (-0.000536238   0.00400425)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          45.93 using 59 PHA bins.
#Fit statistic : Chi-Squared =          45.91 using 59 PHA bins.
# Reduced chi-squared =         0.8352 for     55 degrees of freedom 
# Reduced chi-squared =         0.8348 for     55 degrees of freedom 
# Null hypothesis probability =   8.030530e-01
# Null hypothesis probability =   8.036915e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.289e-08   7.665e-09
25- 50  2.731e-08   1.591e-08
50-150  4.056e-08   2.124e-08
15-150  8.076e-08   3.923e-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: 1.74121     ( -0.347571   0.367687 )
Norm@50keV  : 1.71977E-03    ( -0.000363941   0.000347064 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.63 using 59 PHA bins.
# Reduced chi-squared =         0.8883 for     57 degrees of freedom 
# Null hypothesis probability =   7.112382e-01
 
Photon flux (15-150 keV)    in 38.08 sec: 0.231793 ( -0.0420702  0.0421218 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.046e-07 ( -1.29251e-07  1.32393e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.16425     ( -0.829658   0.649723 )
Epeak [keV] : 64.0655      (   )
Norm@50keV  : 9.87687E-04    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.34 using 59 PHA bins.
# Reduced chi-squared =         0.8812 for     56 degrees of freedom 
# Null hypothesis probability =   7.230635e-01
 
Photon flux (15-150 keV)    in 38.08 sec: 0.231751 ( -0.041608  0.042025 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.02909e-07 ( -1.27435e-07  1.28611e-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)  = 2.52e-07
S(50-100 keV) = 2.70e-07

T90 vs. Hardness ratio plot

T90                                   = 52.432000041008 sec.
Hardness ratio (energy fluence ratio) = 1.07143

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.08577
Count Ratio (50-100 keV) / (15-25 keV) = 0.690528

Mask shadow pattern

IMX = 2.424009774163753E-01, IMY = 5.850947854765933E-01

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 35.016000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
299.5825  35.1919    0.9  27.7  101.9  11.7838  12.5    0.7	Cyg X-1                       
307.9821  40.9286   11.1  19.4   94.5   0.6388   1.0    6.0	Cyg X-3                       
326.1741  38.3222 2700.0  18.7   50.0  -0.0002  -0.0    0.1	Cyg X-2                       
248.1752  43.5834    2.6  48.1  161.5  11.1575   4.4 ------	UNKNOWN                       
  5.9305  10.8162    2.7  55.8    1.9   8.1399   4.2 ------	UNKNOWN                       
247.9333  59.0653    2.7  38.5  179.5   3.3220   4.2 ------	UNKNOWN                       
345.8325  60.1212    2.3  11.3  -61.9   2.2796   5.0 ------	UNKNOWN                       
210.0462  73.2857    2.9  42.5 -149.7   3.2354   4.0 ------	UNKNOWN                       
165.8805  71.2896    2.4  50.9 -135.5  10.4662   4.8 ------	UNKNOWN

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

Time interval of the image:
35.016000 73.100590
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
299.6259  35.1175    5.5  27.7  101.8  -0.3489  -2.1    5.3	Cyg X-1                       
308.1028  40.9758    4.8  19.3   94.3   0.2653   2.4    1.4	Cyg X-3                       
326.4250  38.3339   11.3  18.7   49.3   0.0975   1.0   11.9	Cyg X-2                       
334.3660  27.5516    2.1  30.2   36.2   0.7883   5.4 ------	UNKNOWN                       
  5.8489  12.6570    2.2  54.2    1.0   1.4857   5.2 ------	UNKNOWN                       
225.3813  55.0868    2.3  50.5 -174.0   1.2822   5.0 ------	UNKNOWN                       
 15.8606  30.2738    2.2  44.0  -21.9   0.7740   5.4 ------	UNKNOWN                       
 28.1311  58.8991    1.3  32.3  -67.5   1.0320   8.8 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
125.300600 963.015300
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
245.7722  70.2924    2.6  48.0  161.5  28.8592   4.5 ------	UNKNOWN                       
159.8405  74.3737    2.8  42.9 -165.2   9.0375   4.1 ------	UNKNOWN                       
 80.1538  35.2880    2.5  41.1  -80.9  19.3064   4.5 ------	UNKNOWN

Plot creation:
Tue Jul 30 18:25:22 EDT 2019