batgrbproduct analysis for trigger=1277277

batgrbproduct Analysis for Trigger=1277277

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.48
    Process Start Time (local time): Sat Dec 28 20:17:39 EST 2024
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/prebascript/trigger1277277/batgroup_hand_proc
======================================================================

  Trigger: 01277277      Segment: 000

  BAT Trigger Time: 757051069.952   [s; MET]
      Trigger Stop: 757051070.464   [s; MET]
               UTC: 2024-12-28T03:57:15.160580    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 344.824008424848   Dec: 18.6040815474546  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    20.9
     Image Trigger?:     NO
     Rate S/N Ratio:     97.1699542039616  [ if not an image trigger ]
     Image S/N Ratio:    20.9

  Flight Position:   [ source = BAT ]
    RA: 344.824008424848   Dec: 18.6040815474546  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 344.810117492842   Dec: 18.6079526906165  [deg; J2000]  
        { 22h 59m 14.4s , +18d 36' 28.6" }
         +/- 0.761828466267425 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.276427577147521 [arcmin] (formal 1-sigma fit error)
    SNR: 44.8635683825315
 
  Angular difference between Flight and Ground position is 0.823337 arcmin
 
  Partial Coding Fraction: 0.390625    [ including projection effects ]

  Duration
     T90: 8.05599999427795 +/- 0.534658750758867
        Measured from: -4.3400000333786
                   to: 3.71599996089935     [s; relative to TRIGTIME]
     T50: 2.55199992656708 +/- 0.0665732703150054
        Measured from: 0.103999972343445
                   to: 2.65599989891052     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 1.94400000572205     
                   to: 2.94400000572205     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -5.1599999666214     
                   to: 4.71200001239777     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.447660   2.233363   1.295337   0.213364
           0.042411   0.048139   0.039382   0.025355 [error]
 Peak      0.367713   0.696973   0.463132   0.065062
           0.018638   0.023109   0.019299   0.009995 [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 5.81e-07 8.89e-07 1.02e-06 2.25e-06 3.16e-06 4.74e-06   erg/cm2
              Error -------- -------- -------- -------- -------- --------   erg/cm2
Peak flux Power-law 4.75e+00 4.52e+00 2.99e+00 3.08e+00 1.35e+01 1.53e+01   ph/cm2/s
              Error -------- -------- -------- -------- -------- --------   ph/cm2/s
 
Fluence   Cutoff-PL 4.94e-07 9.63e-07 1.07e-06 7.83e-07 2.99e-06 3.31e-06   erg/cm2
              Error 3.54e-08 3.43e-08 4.51e-08 1.93e-07 1.07e-07 2.16e-07   erg/cm2
Peak flux Cutoff-PL 3.73e+00 5.23e+00 3.43e+00 9.67e-01 1.31e+01 1.34e+01   ph/cm2/s
              Error 3.69e-01 2.63e-01 1.91e-01 2.36e-01 5.90e-01 6.28e-01   ph/cm2/s
 
Fluence        Band 4.52e-07 1.00e-06 1.01e-06 1.55e-06 3.01e-06 4.02e-06   erg/cm2
              Error 4.17e-08 3.96e-08 4.47e-08 2.52e-07 1.03e-07 2.69e-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    1.800    0.000    -      -           3.48e-02 0.00e+00  129.770 57
CPL   0.905    0.244      61.0    5.2      9.76e-02 2.76e-02   82.230 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.596    0.000    -      -           1.05e-01 0.00e+00  131.370 57
CPL   0.161    0.331      64.2    5.1      5.66e-01 2.23e-01   58.300 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: 7.552000 sec.
T50 in the 50-300 keV band: 2.368000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100    9.872   -5.160    4.712
T90     8.056   -4.340    3.716
T50     2.552    0.104    2.656
Peak    1.000    1.944    2.944

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  344.8101 +18.6080 0.0043   32.4 -114.5       5.4946    44.9  TRIG_01277277       
------------------------------------------
 
Foreground time interval of the image:
 -5.160   4.712 (delta_t =   9.872 [sec])
Background time interval of the image:
-64.051  -5.160 (delta_t =  58.891 [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   -5.160 sec. to    4.712 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.79960     (     )
Norm@50keV  : 3.47558E-02    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         129.77 using 59 PHA bins.
# Reduced chi-squared =         2.2767 for     57 degrees of freedom 
# Null hypothesis probability =   1.340394e-07
 
Photon flux (15-150 keV)    in 9.872 sec: 4.78855 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.15872e-06 ( 0  0 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -5.160 sec. to    4.712 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.904818     ( -0.250938   0.237509 )
Epeak [keV] : 61.0092      ( -4.39857 6.00426 )
Norm@50keV  : 9.76478E-02    ( -0.023001   0.0322435 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          82.23 using 59 PHA bins.
# Reduced chi-squared =          1.468 for     56 degrees of freedom 
# Null hypothesis probability =   1.278844e-02
 
Photon flux (15-150 keV)    in 9.872 sec: 4.55586 ( -0.16242  0.16304 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.99011e-06 ( -1.06627e-07  1.06677e-07 ) ergs/cm2
 
Band function
Time interval is from   -5.160 sec. to    4.712 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 7.00150E-03   ( -0.771435   1.73813 )
beta        : -2.18544    ( -0.184033   0.142333 )
Epeak [keV] : 45.1771      ( -7.16967 8.36492 )
Norm@50keV   : 0.359982    ( -0.329622   5.41122 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          74.13 using 59 PHA bins.
# Reduced chi-squared =          1.348 for     55 degrees of freedom 
# Null hypothesis probability =   4.367885e-02
 
Photon flux (15-150 keV)    in 9.872 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.00677e-06 ( -3.00671e-06  -1.02698e-07 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 13.2221  (  )
R^2/D10^2   : 0.804016  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         245.32 using 59 PHA bins.
# Reduced chi-squared =         4.3039 for     57 degrees of freedom 
# Null hypothesis probability =   3.300995e-25
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.942e-07   1.673e-08
25- 50  1.032e-06   3.653e-08
50-150  1.152e-06   6.713e-08
15-150  2.477e-06   7.799e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 110.444       (-13.2723      11.7583)
Norm        : 20.4749       (-0.807572     1.0821)
------------------------------------------------------------
 Reduced chi-squared = 
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.278e-07   3.426e-08
25- 50  9.303e-07   4.156e-08
50-150  1.592e-06   3.643e-07
15-150  3.050e-06   3.880e-07
Double BB
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 8.05007        (-0.815905      0.839172)
R1^2/D10^2  : 3.34388        (-0.851619      1.28892)
kT2 [keV]   : 23.9313        (-2.86219      4.1661)
R2^2/D10^2  : 5.68971E-02    (-0.02747   0.0414393)
------------------------------------------------------------
 Reduced chi-squared = 
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.458e-07   4.324e-08
25- 50  1.004e-06   7.251e-08
50-150  1.537e-06   2.172e-07
15-150  2.987e-06   2.976e-07

Peak spectrum fit

Power-law model
Time interval is from    1.944 sec. to    2.944 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.59575     (     )
Norm@50keV  : 0.105379    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         131.37 using 59 PHA bins.
# Reduced chi-squared =         2.3047 for     57 degrees of freedom 
# Null hypothesis probability =   8.383840e-08
 
Photon flux (15-150 keV)    in 1 sec: 13.5240 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.86039e-07 ( 0  0 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    1.944 sec. to    2.944 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.161398     ( -0.342746   0.319063 )
Epeak [keV] : 64.2392      ( -4.48511 5.78566 )
Norm@50keV  : 0.566177    ( -0.173362   0.273463 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.30 using 59 PHA bins.
# Reduced chi-squared =          1.041 for     56 degrees of freedom 
# Null hypothesis probability =   3.906940e-01
 
Photon flux (15-150 keV)    in 1 sec: 13.1348 ( -0.5894  0.59 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.38395e-07 ( -4.5631e-08  4.5822e-08 ) ergs/cm2
 
Band function
Time interval is from    1.944 sec. to    2.944 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.161266   ( -0.187844   0.250404 )
beta        : -10.00000    ( 10   1.99628e-05 )
Epeak [keV] : 64.2260      ( -3.80665 4.12018 )
Norm@50keV   : 0.566324    ( -0.0230283   0.274013 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.30 using 59 PHA bins.
# Reduced chi-squared =          1.060 for     55 degrees of freedom 
# Null hypothesis probability =   3.549662e-01
 
Photon flux (15-150 keV)    in 1 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.49505e-07 ( -9.49498e-07  -4.5281e-08 ) ergs/cm2
 
Single BB
 XSPEC: quit
 
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 14.4016  (-0.620407  0.648312)
R^2/D10^2   : 1.90197  (-0.284318   0.33192)
(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  8.307e-08   6.425e-09
25- 50  3.176e-07   1.495e-08
50-150  4.400e-07   3.555e-08
15-150  8.407e-07   3.590e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 163.268       (-27.5007      32.1697)
Norm        : 56.8936       (-2.59319     2.92115)
------------------------------------------------------------
 Reduced chi-squared = 
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.450e-07   9.900e-09
25- 50  2.720e-07   1.955e-08
50-150  5.553e-07   1.453e-07
15-150  9.723e-07   1.612e-07
Double BB
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 8.95613        (-1.53034      1.66904)
R1^2/D10^2  : 5.91911        (-1.93567      3.50861)
kT2 [keV]   : 22.7948        (-3.48958      7.30959)
R2^2/D10^2  : 0.226842    (-0.160452   0.26365)
------------------------------------------------------------
 Reduced chi-squared = 
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.137e-07   1.672e-08
25- 50  3.103e-07   4.520e-08
50-150  5.227e-07   1.743e-07
15-150  9.466e-07   2.088e-07
Plot creation:
Sat Dec 28 20:24:38 EST 2024