batgrbproduct analysis for trigger=900285

batgrbproduct Analysis for Trigger=900285

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Thu Apr 25 16:03:21 EDT 2019
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger900285/GCN5_download_cron
======================================================================

  Trigger: 00900285      Segment: 000

  BAT Trigger Time: 577792865.984   [s; MET]
      Trigger Stop: 577792867.008   [s; MET]
               UTC: 2019-04-24T10:00:43.191560    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 48.6808760446314   Dec: 20.2334856376405  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    6.72
     Image Trigger?:     NO
     Rate S/N Ratio:     15.1657508881031  [ if not an image trigger ]
     Image S/N Ratio:    6.72

  Flight Position:   [ source = BAT ]
    RA: 48.6808760446314   Dec: 20.2334856376405  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 48.6925264972252   Dec: 20.2388717586469  [deg; J2000]  
        { 03h 14m 46.2s , +20d 14' 19.9" }
         +/- 1.4133774428187 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.543620329277125 [arcmin] (formal 1-sigma fit error)
    SNR: 18.5551244578905
 
  Angular difference between Flight and Ground position is 0.731174 arcmin
 
  Partial Coding Fraction: 0.4101562    [ including projection effects ]

  Duration
     T90: 10.6640000343323 +/- 2.25634473343057
        Measured from: -0.803999900817871
                   to: 9.8600001335144     [s; relative to TRIGTIME]
     T50: 5.19200003147125 +/- 0.916375441274666
        Measured from: 1.35200011730194
                   to: 6.54400014877319     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 1.09600007534027     
                   to: 2.09600007534027     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -1.31199991703033     
                   to: 12.0440000295639     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.449041   0.690788   0.564510   0.137256
           0.046367   0.049910   0.044907   0.036049 [error]
 Peak      0.047044   0.088191   0.084938   0.022237
           0.012712   0.014085   0.013490   0.011027 [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 1.52e-07 2.88e-07 4.23e-07 1.33e-06 1.20e-06 2.19e-06   erg/cm2
              Error 2.06e-08 2.40e-08 4.25e-08 2.85e-07 1.04e-07 3.17e-07   erg/cm2
Peak flux Power-law 4.77e-01 6.17e-01 5.84e-01 9.77e-01 2.00e+00 2.65e+00   ph/cm2/s
              Error 1.59e-01 1.24e-01 1.00e-01 3.71e-01 3.32e-01 4.46e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.43e-07 3.00e-07 4.35e-07 7.69e-07 1.17e-06 1.65e-06   erg/cm2
              Error 2.40e-08 2.95e-08 4.69e-08 4.64e-07 1.13e-07 6.08e-07   erg/cm2
Peak flux Cutoff-PL 4.80e-01 6.18e-01 5.83e-01 9.64e-01 2.00e+00 2.64e+00   ph/cm2/s
              Error 1.61e-01 1.27e-01 1.11e-01 4.01e-01 2.49e-01 5.59e-01   ph/cm2/s
 
Fluence        Band 1.37e-07 3.10e-07 4.17e-07 1.14e-06 1.17e-06 2.01e-06   erg/cm2
              Error 2.67e-08 -------- 4.41e-08 -------- 1.08e-07 --------   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    1.448    0.134    -      -           9.36e-03 7.43e-04   54.360 57
CPL   1.077    0.503     125.8  -38.4      1.44e-02 9.32e-03   52.850 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.080    0.285    -      -           1.73e-02 2.76e-03   52.640 57
CPL   1.080    0.291    9999.4    0.0      1.74e-02 1.55e-02   52.640 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: 6.528000 sec.
T50 in the 50-300 keV band: 3.840000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   13.356   -1.312   12.044
T90    10.664   -0.804    9.860
T50     5.192    1.352    6.544
Peak    1.000    1.096    2.096

Image

Pre-slew 15-350 keV image (Event data; bkg subtracted)

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
   48.6925 +20.2389 0.0104   33.7  -74.9       1.8732    18.6  TRIG_00900285       
------------------------------------------
 
Foreground time interval of the image:
 -1.312  12.044 (delta_t =  13.356 [sec])
Background time interval of the image:
-239.984  -1.312 (delta_t = 238.672 [sec])

Lightcurves

Notes:

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)

Spectra

Notes:

Time averaged spectrum fit using the pre-slew DRM

Power-law model
Time interval is from   -1.312 sec. to   12.044 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.44835     ( -0.133404   0.13384 )
Norm@50keV  : 9.35860E-03    ( -0.0007438   0.000742013 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.36 using 59 PHA bins.
# Reduced chi-squared =         0.9538 for     57 degrees of freedom 
# Null hypothesis probability =   5.745765e-01
 
Photon flux (15-150 keV)    in 13.36 sec: 1.15285 ( -0.0925313  0.0926486 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.19682e-06 ( -1.0402e-07  1.04644e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -1.312 sec. to   12.044 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.07703     ( -0.573727   0.433139 )
Epeak [keV] : 125.796      ( -48.9919 -125.796 )
Norm@50keV  : 1.44025E-02    ( -0.00550244   0.0131281 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.85 using 59 PHA bins.
# Reduced chi-squared =         0.9437 for     56 degrees of freedom 
# Null hypothesis probability =   5.950419e-01
 
Photon flux (15-150 keV)    in 13.36 sec: 1.13652 ( -0.09535  0.09529 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.16755e-06 ( -1.13505e-07  1.12843e-07 ) ergs/cm2
 
Band function
Time interval is from   -1.312 sec. to   12.044 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 1.33229   ( -4.23779   -1.33693 )
beta        : -1.58290    ( 1.58283   0.191202 )
Epeak [keV] : 34.8796      ( -13.7085 50.402 )
Norm@50keV   : 0.756035    ( -0.777058   199.273 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.36 using 59 PHA bins.
# Reduced chi-squared =         0.9337 for     55 degrees of freedom 
# Null hypothesis probability =   6.146400e-01
 
Photon flux (15-150 keV)    in 13.36 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.17366e-06 ( -1.17357e-06  -1.08354e-07 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 15.5278  (-1.55382  1.74507)
R^2/D10^2   : 0.117683  (-0.0366126   0.0525576)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          87.47 using 59 PHA bins.
# Reduced chi-squared =          1.535 for     57 degrees of freedom 
# Null hypothesis probability =   5.834026e-03
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.888e-08   1.140e-08
25- 50  3.234e-07   3.614e-08
50-150  5.385e-07   8.196e-08
15-150  9.408e-07   9.492e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-39.6161      -200)
Norm        : 4.73863       (-0.371804     0.371804)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.64 using 59 PHA bins.
# Reduced chi-squared =         0.9587 for     57 degrees of freedom 
# Null hypothesis probability =   5.640102e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.583e-07   1.530e-08
25- 50  3.046e-07   3.741e-08
50-150  6.680e-07   2.745e-07
15-150  1.131e-06   2.882e-07
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.69629        (-1.72344      2.04495)
R1^2/D10^2  : 0.858818        (-0.439589      1.09825)
kT2 [keV]   : 28.4847        (-6.51666      15.3293)
R2^2/D10^2  : 1.10374E-02    (-0.00833868   0.0179962)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.29 using 59 PHA bins.
# Reduced chi-squared =         0.9325 for     55 degrees of freedom 
# Null hypothesis probability =   6.172553e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.385e-07   4.864e-08
25- 50  3.114e-07   9.512e-08
50-150  7.254e-07   3.523e-07
15-150  1.175e-06   4.395e-07

Peak spectrum fit

Power-law model
Time interval is from    1.096 sec. to    2.096 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.07951     ( -0.291316   0.279081 )
Norm@50keV  : 1.73107E-02    ( -0.00276946   0.00275349 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.64 using 59 PHA bins.
# Reduced chi-squared =         0.9235 for     57 degrees of freedom 
# Null hypothesis probability =   6.391514e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.00414 ( -0.330717  0.332513 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.82193e-07 ( -3.08439e-08  3.10109e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    1.096 sec. to    2.096 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.07953     ( -0.305033   0.277888 )
Epeak [keV] : 9999.36      ( -9999.36 -9999.36 )
Norm@50keV  : 1.74075E-02    ( -0.00273195   0.0283059 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.64 using 59 PHA bins.
# Reduced chi-squared =         0.9401 for     56 degrees of freedom 
# Null hypothesis probability =   6.026839e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.00495 ( -0.16812  0.33021 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.82129e-07 ( -3.1161e-08  3.1157e-08 ) ergs/cm2
 
Band function
Time interval is from    1.096 sec. to    2.096 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.87696   ( -4.87696   -4.87696 )
beta        : -1.14305    ( -0.331848   0.32037 )
Epeak [keV] : 28.0243      ( -28.0243 10.9146 )
Norm@50keV   : 530.857    ( -83.3311   4.95305e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.55 using 59 PHA bins.
# Reduced chi-squared =         0.9554 for     55 degrees of freedom 
# Null hypothesis probability =   5.688970e-01
 
Photon flux (15-150 keV)    in 1 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]    : 23.5056  (-5.13683  7.15456)
R^2/D10^2   : 5.62020E-02  (-0.0312736   0.0670515)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          63.29 using 59 PHA bins.
# Reduced chi-squared =          1.110 for     57 degrees of freedom 
# Null hypothesis probability =   2.641322e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.568e-09   2.162e-09
25- 50  3.058e-08   9.025e-09
50-150  1.260e-07   3.847e-08
15-150  1.622e-07   4.191e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-45.2705      -200)
Norm        : 8.32826       (-1.36131     1.36131)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.97 using 59 PHA bins.
# Reduced chi-squared =          1.070 for     57 degrees of freedom 
# Null hypothesis probability =   3.353148e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.074e-08   1.188e-08
25- 50  3.989e-08   2.237e-08
50-150  8.749e-08   4.870e-08
15-150  1.481e-07   8.360e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.64423        (-2.7927      3.84539)
R1^2/D10^2  : 1.31138        (-0.989874      3.44633)
kT2 [keV]   : 38.7252        (-12.3161      42.0112)
R2^2/D10^2  : 1.07051E-02    (-0.00910346   0.0246638)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.96 using 59 PHA bins.
# Reduced chi-squared =         0.9265 for     55 degrees of freedom 
# Null hypothesis probability =   6.298012e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.549e-08   9.010e-09
25- 50  3.591e-08   1.950e-08
50-150  1.363e-07   7.480e-08
15-150  1.877e-07   9.935e-08
Plot creation:
Thu Apr 25 16:09:49 EDT 2019