batgrbproduct analysis for trigger=1200812

batgrbproduct Analysis for Trigger=1200812

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 v2.48
    Process Start Time (local time): Tue Dec 26 15:30:18 EST 2023
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1200812
======================================================================

  Trigger: 01200812      Segment: 000

  BAT Trigger Time: 723487472   [s; MET]
      Trigger Stop: 723487536   [s; MET]
               UTC: 2023-12-05T16:43:59.506460    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 54.1545616599091   Dec: 27.146354688855  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    16.23
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    16.23

  Flight Position:   [ source = BAT ]
    RA: 54.1545616599091   Dec: 27.146354688855  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 54.1505267917781   Dec: 27.1462970484266  [deg; J2000]  
        { 03h 36m 36.1s , +27d 08' 46.7" }
         +/- 0.97814002710332 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.410163277288769 [arcmin] (formal 1-sigma fit error)
    SNR: 31.3928823456744
 
  Angular difference between Flight and Ground position is 0.215452 arcmin
 
  Partial Coding Fraction: 0.5078125    [ including projection effects ]

  Duration
     T90: 64 +/- 16
        Measured from: -31
                   to: 33     [s; relative to TRIGTIME]
     T50: 16 +/- 16
        Measured from: -15
                   to: 1     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -7.5     
                   to: -6.5     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -31     
                   to: 81     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     2.768013   4.058473   3.439446   1.021334
           0.101446   0.106947   0.093032   0.074000 [error]
 Peak      0.043035   0.098737   0.065070   0.024565
           0.010079   0.011675   0.010116   0.008259 [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 9.00e-07 1.77e-06 2.69e-06 8.94e-06 7.55e-06 1.43e-05   erg/cm2
              Error 5.69e-08 6.44e-08 9.60e-08 7.46e-07 2.39e-07 7.89e-07   erg/cm2
Peak flux Power-law 5.11e-01 5.98e-01 5.04e-01 7.17e-01 1.87e+00 2.33e+00   ph/cm2/s
              Error 1.29e-01 9.61e-02 8.00e-02 2.30e-01 2.70e-01 3.38e-01   ph/cm2/s
 
Fluence   Cutoff-PL 9.03e-07 1.77e-06 2.69e-06 9.07e-06 7.56e-06 1.43e-05   erg/cm2
              Error 6.89e-08 4.92e-08 1.03e-07 1.39e-06 1.96e-07 1.36e-06   erg/cm2
Peak flux Cutoff-PL 4.64e-01 6.49e-01 5.35e-01 3.39e-01 1.85e+00 1.99e+00   ph/cm2/s
              Error 1.44e-01 1.25e-01 9.39e-02 3.43e-01 2.72e-01 4.51e-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    1.392    0.057    -      -           6.96e-03 2.10e-04   39.810 57
CPL   1.389    0.155    9998.8    0.0      6.99e-03 8.67e-04   39.820 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.248    0.225    -      -           1.58e-02 2.21e-03   59.370 57
CPL   0.578    0.982     104.5  -31.7      3.54e-02 6.67e-02   57.930 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: 47.680000 sec.
T50 in the 50-300 keV band: 11.200000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  112.000  -31.000   81.000
T90    64.000  -31.000   33.000
T50    16.000  -15.000    1.000
Peak    1.000   -7.500   -6.500

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
   54.1505    27.1463   0.0061    31.9898    36.9517         9.2384534     31.393 TRIG_01200812                 
 
Foreground time interval of the image:
-16.899  72.901 (delta_t =  89.800 [sec])
Background time interval of the image:

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  -31.000 sec. to   81.000 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.39231     ( -0.0572663   0.0571092 )
Norm@50keV  : 6.96323E-03    ( -0.000210158   0.000210103 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   39.81     using 59 bins.
 Reduced chi-squared = 0.698421
# Null hypothesis probability of 9.59e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 112 sec: 0.846538 ( -0.028379  0.028512 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.54863e-06 ( -2.3879e-07  2.39047e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -31.000 sec. to   81.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.38885     ( -0.169389   0.139783 )
Epeak [keV] : 9998.76      ( -9998.76 -9998.76 )
Norm@50keV  : 6.98848E-03    ( -0.000210545   0.00152295 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   39.82     using 59 bins.
 Reduced chi-squared = 0.711071
# Null hypothesis probability of 9.50e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 112 sec: 0.847495 ( -0.033044  0.029149 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.55559e-06 ( -2.63228e-07  1.28071e-07 ) ergs/cm2

Band function

Time interval is from  -31.000 sec. to   81.000 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]    : 18.5241  (  )
R^2/D10^2   : 4.58957E-02  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                  303.47     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 2.57e-35 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.498e-07   2.302e-08
25- 50  1.652e-06   7.448e-08
50-150  4.144e-06   2.044e-07
15-150  6.147e-06   2.173e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-5.64667      -200)
Norm        : 3.54907       (-0.107527     0.107527)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   77.21     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 3.86e-02 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.901e-07   3.718e-08
25- 50  1.905e-06   6.496e-08
50-150  4.177e-06   1.434e-07
15-150  7.072e-06   2.425e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.40143        (-0.784412      0.858387)
R1^2/D10^2  : 0.690882        (-0.217057      0.344467)
kT2 [keV]   : 31.0816        (-3.02708      4.02397)
R2^2/D10^2  : 6.76199E-03    (-0.00224163   0.00284557)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   42.62     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 8.88e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.309e-07   8.742e-08
25- 50  1.795e-06   1.372e-07
50-150  4.932e-06   3.724e-07
15-150  7.558e-06   5.432e-07

Peak spectrum fit

Power-law model

Time interval is from   -7.500 sec. to   -6.500 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.24754     ( -0.228285   0.220897 )
Norm@50keV  : 1.58141E-02    ( -0.00221235   0.00221235 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   59.37     using 59 bins.
 Reduced chi-squared = 1.04158
# Null hypothesis probability of 3.89e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 1.86965 ( -0.26955  0.27011 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.58387e-07 ( -2.39496e-08  2.4116e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -7.500 sec. to   -6.500 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.578462     ( -1.19231   0.771893 )
Epeak [keV] : 104.474      ( -41.0215 -104.498 )
Norm@50keV  : 3.53781E-02    ( -0.020989   0.112507 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   57.93     using 59 bins.
 Reduced chi-squared = 1.03446
# Null hypothesis probability of 4.04e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 1.84533 ( -0.27216  0.27253 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.50845e-07 ( -2.72872e-08  2.66352e-08 ) ergs/cm2

Band function

Time interval is from   -7.500 sec. to   -6.500 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]    : 15.4788  (-2.4773  3.24301)
R^2/D10^2   : 0.207827  (-0.100776   0.174087)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   65.01     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 2.18e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.037e-08   2.943e-09
25- 50  4.238e-08   9.090e-09
50-150  7.004e-08   1.684e-08
15-150  1.228e-07   2.420e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-48.4006      -200)
Norm        : 7.81244       (-1.10791     1.10791)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   62.99     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 2.73e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.945e-08   1.106e-08
25- 50  3.742e-08   2.112e-08
50-150  8.207e-08   4.650e-08
15-150  1.390e-07   7.855e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 11.2994        (-2.14566      2.7891)
R1^2/D10^2  : 0.514629        (-0.275368      0.461067)
kT2 [keV]   : 200.000        (-200      -200)
R2^2/D10^2  : 2.64465E-04    (-0.000106626   0.00135475)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   50.88     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 6.33e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.439e-08   6.505e-09
25- 50  4.279e-08   2.090e-08
50-150  1.017e-07   4.856e-08
15-150  1.589e-07   7.070e-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: 1.39473     ( -0.0615151   0.061347 )
Norm@50keV  : 6.92775E-03    ( -0.000227947   0.000227922 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   41.21     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 9.43e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 89.8 sec: 0.842668 ( -0.0304761  0.0306061 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.01777e-06 ( -2.08941e-07  2.09388e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.30905     ( -0.236891   0.11431 )
Epeak [keV] : 453.123      ( -453.065 -453.065 )
Norm@50keV  : 7.57380E-03    ( -0.00115884   0.00204512 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   40.80     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 9.37e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 89.8 sec: 0.837781 ( -0.032849  0.032916 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.99128e-06 ( -2.23656e-07  2.22614e-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)  = 1.77e-06
S(50-100 keV) = 2.69e-06

T90 vs. Hardness ratio plot

T90                                   = 64 sec.
Hardness ratio (energy fluence ratio) = 1.51977

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.4662
Count Ratio (50-100 keV) / (15-25 keV) = 1.24257

Mask shadow pattern

IMX = 4.991616332418481E-01, IMY = -3.754864819192321E-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:

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

Time interval of the image:
-16.899410 72.900600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6525  22.0451    1.0  24.6   94.6   3.6644  11.7    2.1	Crab                          
105.6410  10.9587    2.7  35.0  139.1   1.5327   4.3 ------	UNKNOWN                       
 54.1505  27.1463    0.4  32.0   37.0   9.2393  31.4 ------	UNKNOWN                       
 45.8368  25.2114    3.7  35.6   24.7   0.9673   3.1 ------	UNKNOWN                       
 90.8596   0.2377    2.7  18.8  158.0   0.8172   4.3 ------	UNKNOWN                       
116.1753 -27.9139    4.0  50.7 -164.4   1.4636   2.9 ------	UNKNOWN                       
 42.4116  -8.5877    2.8  30.9  -39.2   1.0655   4.2 ------	UNKNOWN                       
 99.0709 -43.2234    3.6  49.7 -137.6   2.2356   3.2 ------	UNKNOWN                       
 36.9294 -27.4887    3.5  43.7  -64.1   3.3571   3.4 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
214.300630 599.400600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6282  22.0254    0.6  27.2   81.9  16.3503  18.0    0.7	Crab                          
 88.7334  36.4808    3.3  30.6   51.1   2.9559   3.5 ------	UNKNOWN                       
 48.4338  27.1317    2.6   5.1 -100.9   2.3917   4.3 ------	UNKNOWN                       
 25.0957 -22.6632    2.6  57.2 -160.1  11.8551   4.4 ------	UNKNOWN                       
  3.9163  45.2645    3.0  43.6  -64.1  10.6604   3.8 ------	UNKNOWN                       
 12.5813   0.4449    2.6  48.0 -129.0  11.8285   4.3 ------	UNKNOWN

Plot creation:
Tue Dec 26 16:59:22 EST 2023