batgrbproduct analysis for trigger=887512

batgrbproduct Analysis for Trigger=887512

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): Sun Mar 17 22:32:51 EDT 2019
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger887512
======================================================================

  Trigger: 00887512      Segment: 000

  BAT Trigger Time: 570901470.784   [s; MET]
      Trigger Stop: 570901474.88   [s; MET]
               UTC: 2019-02-03T15:44:08.426720    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 22.5767302168316   Dec: 55.7384085258687  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.89
     Image Trigger?:     NO
     Rate S/N Ratio:     40  [ if not an image trigger ]
     Image S/N Ratio:    7.89

  Flight Position:   [ source = BAT ]
    RA: 22.5767302168316   Dec: 55.7384085258687  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 22.6030183946477   Dec: 55.7365818867749  [deg; J2000]  
        { 01h 30m 24.7s , +55d 44' 11.7" }
         +/- 0.930678953476845 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.335172611697705 [arcmin] (formal 1-sigma fit error)
    SNR: 33.7046608674537
 
  Angular difference between Flight and Ground position is 0.894729 arcmin
 
  Partial Coding Fraction: 0.2167969    [ including projection effects ]

  Duration
     T90: 86.5600000619888 +/- 64.5798710100376
        Measured from: -48.6000000238419
                   to: 37.960000038147     [s; relative to TRIGTIME]
     T50: 33.8559999465942 +/- 2.72380910725493
        Measured from: -23.2879999876022
                   to: 10.567999958992     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -4.08399999141693     
                   to: -3.08399999141693     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -56.472000002861     
                   to: 229.959999918938     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     3.896826   6.600239   7.191544   3.360588
           0.202493   0.219953   0.204673   0.173606 [error]
 Peak      0.056728   0.193250   0.220398   0.113286
           0.019105   0.023313   0.023973   0.018696 [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 1.35e-06 3.15e-06 5.76e-06 2.52e-05 1.56e-05 3.55e-05   erg/cm2
              Error 1.02e-07 1.39e-07 1.98e-07 2.08e-06 5.20e-07 2.13e-06   erg/cm2
Peak flux Power-law 2.44e-04 2.99e-03 3.18e-02 3.04e+00 1.54e-01 3.10e+00   ph/cm2/s
              Error 1.76e-04 1.85e-03 1.73e-02 1.05e+00 7.13e-02 1.07e+00   ph/cm2/s
 
Fluence   Cutoff-PL 1.35e-06 3.12e-06 5.67e-06 2.61e-05 1.57e-05 3.55e-05   erg/cm2
              Error -------- 1.91e-07 -------- -------- 5.20e-07 2.62e-06   erg/cm2
Peak flux Cutoff-PL 5.13e-02 1.06e-01 4.89e-02 4.69e-02 3.28e-01 4.03e-01   ph/cm2/s
              Error 8.31e-03 4.13e-03 2.72e-03 4.84e-03 1.27e-02 2.02e-02   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    1.125    0.061    -      -           5.26e-03 1.81e-04   61.150 57
CPL   1.124    0.063    9999.4    0.0      5.28e-03 4.10e-04   61.260 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.933    0.219    -      -           3.87e-02 5.16e-03   38.730 57
CPL   0.629    0.718     291.6    0.0      5.11e-02 4.01e-02   38.320 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: 77.056000 sec.
T50 in the 50-300 keV band: 29.952000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  286.432  -56.472  229.960
T90    86.560  -48.600   37.960
T50    33.856  -23.288   10.568
Peak    1.000   -4.084   -3.084

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
   22.6030    55.7366   0.0057    49.3341    13.2805        20.6319892     33.705 TRIG_00887512                 
 
Foreground time interval of the image:
-56.472  37.517 (delta_t =  93.989 [sec])
Background time interval of the image:
-239.784 -56.472 (delta_t = 183.312 [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  -56.472 sec. to  229.960 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.12509     ( -0.0612853   0.0606083 )
Norm@50keV  : 5.26232E-03    ( -0.000181201   0.000180484 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.15 using 59 PHA bins.
# Reduced chi-squared =          1.073 for     57 degrees of freedom 
# Null hypothesis probability =   3.292939e-01
 
Photon flux (15-150 keV)    in 286.4 sec: 0.611964 ( -0.022606  0.022756 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.56352e-05 ( -5.19661e-07  5.20048e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -56.472 sec. to  229.960 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.12377     ( -0.0676704   0.0580065 )
Epeak [keV] : 9999.36      ( -9999.36 -9999.36 )
Norm@50keV  : 5.28440E-03    ( -0.000172562   0.000646778 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.26 using 59 PHA bins.
# Reduced chi-squared =          1.094 for     56 degrees of freedom 
# Null hypothesis probability =   2.929506e-01
 
Photon flux (15-150 keV)    in 286.4 sec: 0.616790 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.56868e-05 ( -5.74026e-07  4.65864e-07 ) ergs/cm2

Band function

Time interval is from  -56.472 sec. to  229.960 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]    : 23.3184  (  )
R^2/D10^2   : 1.71788E-02  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         273.25 using 59 PHA bins.
# Reduced chi-squared =         4.7939 for     57 degrees of freedom 
# Null hypothesis probability =   5.360520e-30
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.816e-07   3.451e-08
25- 50  2.633e-06   1.448e-07
50-150  1.069e-05   4.597e-07
15-150  1.380e-05   5.155e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (      )
Norm        : 2.68136       (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         230.83 using 59 PHA bins.
# Reduced chi-squared =         4.0496 for     57 degrees of freedom 
# Null hypothesis probability =   8.845222e-23
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.912e-06   7.590e-08
25- 50  3.679e-06   1.432e-07
50-150  8.068e-06   3.007e-07
15-150  1.366e-05   4.912e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 8.96106        (-1.09826      1.22847)
R1^2/D10^2  : 0.239325        (-0.078906      0.128093)
kT2 [keV]   : 41.5744        (-5.50954      8.67325)
R2^2/D10^2  : 2.43755E-03    (-0.0010169   0.00132939)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          63.19 using 59 PHA bins.
# Reduced chi-squared =          1.149 for     55 degrees of freedom 
# Null hypothesis probability =   2.094299e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.221e-06   1.445e-07
25- 50  3.301e-06   2.797e-07
50-150  1.131e-05   1.233e-06
15-150  1.583e-05   1.601e-06

Peak spectrum fit

Power-law model

Time interval is from   -4.084 sec. to   -3.084 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.933374     ( -0.222595   0.214783 )
Norm@50keV  : 3.86648E-02    ( -0.00519359   0.0051176 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          38.73 using 59 PHA bins.
# Reduced chi-squared =         0.6794 for     57 degrees of freedom 
# Null hypothesis probability =   9.695584e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.154033 ( -0.01891  0.123661 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.2847e-07 ( -5.56837e-08  5.57247e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -4.084 sec. to   -3.084 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.629182     ( -0.947092   0.488396 )
Epeak [keV] : 291.553      ( -291.553 -291.553 )
Norm@50keV  : 5.10521E-02    ( -0.0167197   0.0635603 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          38.32 using 59 PHA bins.
# Reduced chi-squared =         0.6843 for     56 degrees of freedom 
# Null hypothesis probability =   9.658834e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.328211 ( -0.328211  -0.302782 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.28046e-07 ( -5.63225e-08  5.6171e-08 ) ergs/cm2

Band function

Time interval is from   -4.084 sec. to   -3.084 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]    : 26.4958  (-4.30404  5.45048)
R^2/D10^2   : 9.31122E-02  (-0.0401389   0.0674168)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.52 using 59 PHA bins.
# Reduced chi-squared =         0.8337 for     57 degrees of freedom 
# Null hypothesis probability =   8.102972e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.100e-08   3.036e-09
25- 50  6.423e-08   1.426e-08
50-150  3.308e-07   6.685e-08
15-150  4.061e-07   7.010e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-25.3201      -200)
Norm        : 18.5430       (-2.48867     2.48867)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.64 using 59 PHA bins.
# Reduced chi-squared =          1.081 for     57 degrees of freedom 
# Null hypothesis probability =   3.136050e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.619e-08   2.625e-08
25- 50  8.885e-08   4.979e-08
50-150  1.949e-07   1.098e-07
15-150  3.299e-07   1.798e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 8.78996        (-3.87746      6.21073)
R1^2/D10^2  : 1.38574        (-1.081      8.85248)
kT2 [keV]   : 37.5702        (-9.793      40.6139)
R2^2/D10^2  : 2.82605E-02    (-0.0236314   0.060935)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          37.60 using 59 PHA bins.
# Reduced chi-squared =         0.6836 for     55 degrees of freedom 
# Null hypothesis probability =   9.648995e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.596e-08   1.505e-08
25- 50  7.815e-08   4.134e-08
50-150  3.328e-07   1.812e-07
15-150  4.369e-07   2.286e-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: 1.04458     ( -0.0563744   0.0557191 )
Norm@50keV  : 1.48877E-02    ( -0.000486669   0.000484387 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.09 using 59 PHA bins.
# Reduced chi-squared =          1.124 for     57 degrees of freedom 
# Null hypothesis probability =   2.418475e-01
 
Photon flux (15-150 keV)    in 93.99 sec: 1.71878 ( -0.0589824  0.0592812 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.48991e-05 ( -4.57172e-07  4.57467e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.03922     ( -0.0572973   0.0556746 )
Epeak [keV] : 9999.36      ( -9999.36 -9999.36 )
Norm@50keV  : 1.49745E-02    ( -0.000460397   0.00310838 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.10 using 59 PHA bins.
# Reduced chi-squared =          1.145 for     56 degrees of freedom 
# Null hypothesis probability =   2.137773e-01
 
Photon flux (15-150 keV)    in 93.99 sec: 1.71860 ( -0.0574  0.05867 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.49048e-05 ( -4.52092e-07  4.48144e-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)  = 3.15e-06
S(50-100 keV) = 5.76e-06

T90 vs. Hardness ratio plot

T90                                   = 86.5600000619888 sec.
Hardness ratio (energy fluence ratio) = 1.82857

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.69375
Count Ratio (50-100 keV) / (15-25 keV) = 1.84549

Mask shadow pattern

IMX = 1.132877569568501E+00, IMY = -2.673935363469832E-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:
-239.784000 -56.472000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 50.1428 -43.0455    2.0  53.3  178.6   4.0746   5.7 ------	UNKNOWN                       
  7.3223  52.8801    2.7  49.5    1.0   1.7468   4.3 ------	UNKNOWN                       
355.7140  57.3966    3.0  56.9   -2.7   3.1758   3.9 ------	UNKNOWN

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

Time interval of the image:
-56.472000 37.516600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 68.1471 -24.8741    2.1  49.6  148.9   3.6639   5.5 ------	UNKNOWN                       
 22.6030  55.7366    0.3  49.3   13.3  20.6319  33.7 ------	UNKNOWN                       
 33.5522 -51.1261    3.3  57.9 -165.6   3.3548   3.5 ------	UNKNOWN                       
356.1493 -23.4141    2.4  43.8 -116.4   3.5158   4.8 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
102.316600 712.876400
720.216000 789.916600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
307.9163  41.0438   19.7  49.1  -44.9   1.7023   0.6   10.3	Cyg X-3                       
326.2783  38.3676    9.1  40.7  -61.5   2.1520   1.3    5.7	Cyg X-2                       
 84.3187  43.0823    3.0  40.6  110.6   8.0812   3.9 ------	UNKNOWN                       
 40.8925  61.4093    1.2  11.1   81.0   4.7926   9.4 ------	UNKNOWN                       
 43.8656  17.7400    2.5  41.3  177.7   4.2723   4.6 ------	UNKNOWN                       
 35.2654   1.8026    3.2  54.9 -166.3   6.4061   3.6 ------	UNKNOWN                       
335.6743  32.1729    3.3  40.0  -76.7   6.8556   3.5 ------	UNKNOWN                       
344.2517  25.7622    4.8  40.8  -91.9   6.4061   2.4 ------	UNKNOWN                       
  6.5231   9.3798    2.7  48.0 -129.2  11.2839   4.2 ------	UNKNOWN

Plot creation:
Thu Mar 21 16:37:01 EDT 2019