batgrbproduct analysis for trigger=1086826

batgrbproduct Analysis for Trigger=1086826

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.48
    Process Start Time (local time): Sat Dec  4 11:03:59 EST 2021
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/prebascript/trigger1086826/GCN5_download_cron
======================================================================

  Trigger: 01086826      Segment: 000

  BAT Trigger Time: 660214986.56   [s; MET]
      Trigger Stop: 660214987.584   [s; MET]
               UTC: 2021-12-03T09:02:38.369880    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 170.174129062455   Dec: 16.2557010562344  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    6.51
     Image Trigger?:     NO
     Rate S/N Ratio:     22.7376340018041  [ if not an image trigger ]
     Image S/N Ratio:    6.51

  Flight Position:   [ source = BAT ]
    RA: 170.174129062455   Dec: 16.2557010562344  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 170.168692273609   Dec: 16.2497117480582  [deg; J2000]  
        { 11h 20m 40.5s , +16d 14' 59.0" }
         +/- nan [arcmin] (estimated 90% radius based on SNR)
         +/- 2.24707006106929 [arcmin] (formal 1-sigma fit error)
    SNR: -4.27718964457076
 
  Angular difference between Flight and Ground position is 0.476670 arcmin
 
  Partial Coding Fraction: 0.75    [ including projection effects ]

  Duration
     T90: 0.0600000619888306 +/- 0.004
        Measured from: 9.17600011825562
                   to: 9.23600018024445     [s; relative to TRIGTIME]
     T50: 0.0359998941421509 +/- 0.004
        Measured from: 9.18800020217896
                   to: 9.22400009632111     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 8.71000003814697     
                   to: 9.71000003814697     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 9.17599999904633     
                   to: 9.24000000953674     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total    -0.004721  -0.003949  -0.004654  -0.004920
           0.001653   0.001829   0.001999   0.001884 [error]
 Peak     -0.002229   0.003607  -0.010397  -0.002422
           0.007130   0.007589   0.007064   0.007878 [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 0.00e+00 0.00e+00 0.00e+00 0.00e+002.66e-09 0.00e+00 0.00e+00   erg/cm2
              Error 7.04e-11 6.35e-11 1.46e-10 4.75e-09 4.08e-10 5.06e-09   erg/cm2
Peak flux Power-law 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   ph/cm2/s
              Error 3.75e-02 1.88e-02 1.16e-02 1.47e-01 5.87e-02 1.52e-01   ph/cm2/s
 
Fluence   Cutoff-PL 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   erg/cm2
              Error 7.04e-11 9.48e-11 2.60e-10 -------- 3.93e-10 2.43e-08   erg/cm2
Peak flux Cutoff-PL 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   ph/cm2/s
              Error 5.91e-02 5.05e-02 1.68e-02 -------- 8.69e-02 --------   ph/cm2/s
 
Fluence        Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   erg/cm2
              Error -------- -------- -------- -------- -------- --------   erg/cm2
Peak flux      Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   ph/cm2/s
              Error 5.43e-02 -------- -------- -------- -------- --------   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.500    0.000    -      -           0.00e+00 4.94e-04   67.010 57
CPL   1.000    0.000      50.0    0.0      0.00e+00 0.00e+00   67.010 56
 
The chi2 of BB fit is  which shows a significant improvement in the fit over a PL.
Check the BB fit.
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.500    0.000    -      -           0.00e+00 3.86e-04   51.450 57
CPL   1.000    0.000      50.0    0.0      0.00e+00 0.00e+00   51.450 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    0.064    9.176    9.240
T90     0.060    9.176    9.236
T50     0.036    9.188    9.224
Peak    1.000    8.710    9.710

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  170.1687 +16.2497 0.0450   17.6  113.6      -0.0170    -4.3  TRIG_01086826       
------------------------------------------
 
Foreground time interval of the image:
  9.176   9.240 (delta_t =   0.064 [sec])
Background time interval of the image:
-239.560 -187.050 (delta_t =  52.510 [sec])
-185.560 -142.720 (delta_t =  42.840 [sec])
-141.560 -135.960 (delta_t =   5.600 [sec])
-134.560 -54.020 (delta_t =  80.540 [sec])
-52.560   9.176 (delta_t =  61.736 [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    9.176 sec. to    9.240 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.50000     ( -1.5   -1.5 )
Norm@50keV  : 0.0    ( 0   0.000988035 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.01 using 59 PHA bins.
# Reduced chi-squared =          1.176 for     57 degrees of freedom 
# Null hypothesis probability =   1.711342e-01
 
Photon flux (15-150 keV)    in 0.064 sec: 0.0 ( 0  0.113575 ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  8.1552e-10 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    9.176 sec. to    9.240 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.00000     (     )
Epeak [keV] : 50.0000      (   )
Norm@50keV  : 0.0    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.01 using 59 PHA bins.
# Reduced chi-squared =          1.197 for     56 degrees of freedom 
# Null hypothesis probability =   1.488125e-01
 
Photon flux (15-150 keV)    in 0.064 sec: 0.0 ( 0  0.113488 ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  7.86816e-10 ) ergs/cm2
 
Band function
Time interval is from    9.176 sec. to    9.240 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 1.33134   ( 0.98395   0.98395 )
beta        : 1.36546    ( 2.5   2.5 )
Epeak [keV] : 0.310441      ( -80 -80 )
Norm@50keV   : 6.73061E-03    ( -0.00610264   1.92082e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.58 using 59 PHA bins.
# Reduced chi-squared =          1.211 for     55 degrees of freedom 
# Null hypothesis probability =   1.361972e-01
 
Photon flux (15-150 keV)    in 0.064 sec: 0.0 (    ) 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]    : 5.00000  (-5  -5)
R^2/D10^2   : 0.0  (0   0)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.01 using 59 PHA bins.
# Reduced chi-squared =          1.176 for     57 degrees of freedom 
# Null hypothesis probability =   1.711342e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  0.000e+00   0.000e+00
25- 50  0.000e+00   0.000e+00
50-150  0.000e+00   0.000e+00
15-150  0.000e+00   0.000e+00
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 7.00000       (-7      -7)
Norm        : 0.0       (0     0)
------------------------------------------------------------
 Reduced chi-squared = 
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  0.000e+00   0.000e+00
25- 50  0.000e+00   0.000e+00
50-150  0.000e+00   0.000e+00
15-150  0.000e+00   0.000e+00
Double BB
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 199.287        (-199.33      -199.33)
R1^2/D10^2  : 9.05165E-06        (-9.3273e-06      -9.3273e-06)
kT2 [keV]   : 10.0000        (-10      -10)
R2^2/D10^2  : 0.0    (0   0)
------------------------------------------------------------
 Reduced chi-squared = 
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  0.000e+00   0.000e+00
25- 50  0.000e+00   0.000e+00
50-150  0.000e+00   0.000e+00
15-150  0.000e+00   0.000e+00

Peak spectrum fit

Power-law model
Time interval is from    8.710 sec. to    9.710 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.50000     ( -1.5   -1.5 )
Norm@50keV  : 0.0    ( 0   0.0007727 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.45 using 59 PHA bins.
# Reduced chi-squared =         0.9027 for     57 degrees of freedom 
# Null hypothesis probability =   6.824107e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.0 ( 0  0.117403 ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  7.32663e-09 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    8.710 sec. to    9.710 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.00000     (     )
Epeak [keV] : 50.0000      (   )
Norm@50keV  : 0.0    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.45 using 59 PHA bins.
# Reduced chi-squared =         0.9188 for     56 degrees of freedom 
# Null hypothesis probability =   6.474478e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.0 ( 0  0.173892 ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  7.27755e-09 ) ergs/cm2
 
Band function
Time interval is from    8.710 sec. to    9.710 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 3.62417   ( 0.98395   0.98395 )
beta        : -9.37073    ( 2.5   2.5 )
Epeak [keV] : 24.6329      ( -80 -80 )
Norm@50keV   : 1.22429    ( -2.7049   42.6977 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.43 using 59 PHA bins.
# Reduced chi-squared =         0.9351 for     55 degrees of freedom 
# Null hypothesis probability =   6.118690e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.0 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 
Single BB
 XSPEC: quit
 
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 5.90033  (-6.15112  -6.15112)
R^2/D10^2   : 2.16564E-02  (-0.0236056   -0.0236056)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
 Reduced chi-squared = 
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.776e-11   5.970e-12
25- 50  9.397e-11   1.736e-09
50-150  8.030e-12   2.596e-32
15-150  1.998e-10   6.585e-10
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 7.00000       (-7      -7)
Norm        : 0.0       (0     0)
------------------------------------------------------------
 Reduced chi-squared = 
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  0.000e+00   0.000e+00
25- 50  0.000e+00   0.000e+00
50-150  0.000e+00   0.000e+00
15-150  0.000e+00   0.000e+00
Double BB
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 4.00000        (-4      -4)
R1^2/D10^2  : 0.0        (0      0)
kT2 [keV]   : 10.0000        (-10      -10)
R2^2/D10^2  : 0.0    (0   0)
------------------------------------------------------------
 Reduced chi-squared = 
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  0.000e+00   0.000e+00
25- 50  0.000e+00   0.000e+00
50-150  0.000e+00   0.000e+00
15-150  0.000e+00   0.000e+00
Plot creation:
Sat Dec  4 11:14:46 EST 2021