batgrbproduct analysis for trigger=1090656

batgrbproduct Analysis for Trigger=1090656

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): Mon Oct 24 00:02:57 EDT 2022
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1090656
======================================================================

  Trigger: 01090656      Segment: 000

  BAT Trigger Time: 661962595.008   [s; MET]
      Trigger Stop: 661962596.032   [s; MET]
               UTC: 2021-12-23T14:29:26.700140    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 227.163643811444   Dec: -26.8726512362331  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    12.22
     Image Trigger?:     NO
     Rate S/N Ratio:     30.4466746952767  [ if not an image trigger ]
     Image S/N Ratio:    12.22

  Flight Position:   [ source = BAT ]
    RA: 227.163643811444   Dec: -26.8726512362331  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 227.169609149185   Dec: -26.88043584476  [deg; J2000]  
        { 15h 08m 40.7s , -26d 52' 49.6" }
         +/- 1.10779445856886 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.332360228519502 [arcmin] (formal 1-sigma fit error)
    SNR: 26.278783305112
 
  Angular difference between Flight and Ground position is 0.565762 arcmin
 
  Partial Coding Fraction: 0.328125    [ including projection effects ]

  Duration
     T90: 11.0759998559952 +/- 0.719077255401357
        Measured from: -2.75199997425079
                   to: 8.32399988174438     [s; relative to TRIGTIME]
     T50: 5.05599999427795 +/- 0.601225352052128
        Measured from: 0.131999969482422
                   to: 5.18799996376038     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.299999952316284     
                   to: 1.29999995231628     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -3.56000006198883     
                   to: 9.05599999427795     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.628269   1.047816   1.082667   0.402071
           0.045756   0.050315   0.047012   0.037117 [error]
 Peak      0.074313   0.153926   0.140292   0.069080
           0.014097   0.015961   0.016022   0.011613 [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 1.96e-07 4.47e-07 8.10e-07 3.48e-06 2.21e-06 4.93e-06   erg/cm2
              Error 1.91e-08 2.60e-08 4.40e-08 4.30e-07 1.14e-07 4.53e-07   erg/cm2
Peak flux Power-law 7.98e-01 9.99e-01 9.11e-01 1.45e+00 3.20e+00 4.16e+00   ph/cm2/s
              Error 1.77e-01 1.37e-01 1.20e-01 3.97e-01 3.81e-01 5.18e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.83e-07 4.57e-07 8.35e-07 2.41e-06 2.17e-06 3.89e-06   erg/cm2
              Error 2.39e-08 2.89e-08 5.34e-08 9.37e-07 1.20e-07 9.90e-07   erg/cm2
Peak flux Cutoff-PL 7.55e-01 1.02e+00 9.42e-01 1.09e+00 3.18e+00 3.81e+00   ph/cm2/s
              Error 1.59e-01 1.55e-01 1.47e-01 5.32e-01 3.87e-01 6.96e-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    1.144    0.084    -      -           1.69e-02 8.21e-04   53.460 57
CPL   0.866    0.334     231.5  -66.1      2.26e-02 8.00e-03   51.460 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.133    0.195    -      -           2.75e-02 3.20e-03   69.770 57
CPL   0.869    0.652     234.5    0.0      3.67e-02 3.52e-02   69.420 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: 11.968000 sec.
T50 in the 50-300 keV band: 5.120000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   12.616   -3.560    9.056
T90    11.076   -2.752    8.324
T50     5.056    0.132    5.188
Peak    1.000    0.300    1.300

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
  227.1696   -26.8804   0.0073    33.2996   -82.3585         3.2216431     26.279 TRIG_01090656                 
 
Foreground time interval of the image:
 -3.560   9.056 (delta_t =  12.616 [sec])
Background time interval of the image:
-239.008  -3.560 (delta_t = 235.448 [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 1.024000

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 1.024000

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 1.024000

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   -3.560 sec. to    9.056 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.14370     ( -0.0847821   0.0839039 )
Norm@50keV  : 1.69302E-02    ( -0.00082139   0.00082012 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   53.46     using 59 bins.
 Reduced chi-squared = 0.937895
# Null hypothesis probability of 6.09e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 12.62 sec: 1.97295 ( -0.09998  0.10015 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.20394e-06 ( -1.13641e-07  1.13874e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from   -3.560 sec. to    9.056 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.865645     ( -0.360868   0.307959 )
Epeak [keV] : 231.483      ( -99.3116 -231.49 )
Norm@50keV  : 2.26250E-02    ( -0.00604496   0.00995063 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   51.46     using 59 bins.
 Reduced chi-squared = 0.918929
# Null hypothesis probability of 6.47e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 12.62 sec: 1.94990 ( -0.10367  0.10376 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.176e-06 ( -1.20069e-07  1.19402e-07 ) ergs/cm2

Band function

Time interval is from   -3.560 sec. to    9.056 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]    : 20.1636  (  )
R^2/D10^2   : 9.00987E-02  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                  120.54     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 1.88e-06 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.883e-08   8.922e-09
25- 50  4.449e-07   3.067e-08
50-150  1.342e-06   1.059e-07
15-150  1.876e-06   1.111e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.359       (      )
Norm        : 8.28053       (     )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                  118.91     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 2.95e-06 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.602e-07   1.413e-08
25- 50  5.006e-07   2.707e-08
50-150  1.098e-06   6.947e-08
15-150  1.859e-06   1.382e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 10.0916        (-2.48209      2.66924)
R1^2/D10^2  : 0.516360        (-0.229427      0.617534)
kT2 [keV]   : 39.1475        (-10.0141      33.5822)
R2^2/D10^2  : 8.49482E-03    (-0.00682205   0.0143074)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   54.51     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 4.93e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.571e-07   3.045e-08
25- 50  4.873e-07   1.030e-07
50-150  1.541e-06   5.854e-07
15-150  2.185e-06   6.534e-07

Peak spectrum fit

Power-law model

Time interval is from    0.300 sec. to    1.300 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.13331     ( -0.196817   0.193656 )
Norm@50keV  : 2.75246E-02    ( -0.00319808   0.00319634 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   69.77     using 59 bins.
 Reduced chi-squared = 1.22404
# Null hypothesis probability of 1.19e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 3.20377 ( -0.38118  0.3817 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.8482e-07 ( -3.63809e-08  3.65757e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.300 sec. to    1.300 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.869470     ( -0.871465   0.43288 )
Epeak [keV] : 234.502      ( -234.516 -234.516 )
Norm@50keV  : 3.67427E-02    ( -0.014785   0.0556096 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   69.42     using 59 bins.
 Reduced chi-squared = 1.23964
# Null hypothesis probability of 1.07e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 3.18184 ( -0.38669  0.38675 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.81443e-07 ( -3.85919e-08  3.79387e-08 ) ergs/cm2

Band function

Time interval is from    0.300 sec. to    1.300 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]    : 19.1680  (-2.77321  3.41698)
R^2/D10^2   : 0.175415  (-0.0726824   0.117179)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   82.96     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 1.40e-02 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.263e-08   2.919e-09
25- 50  6.111e-08   1.019e-08
50-150  1.653e-07   3.280e-08
15-150  2.390e-07   4.005e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-30.2258      -200)
Norm        : 13.1136       (-1.56904     1.56904)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   81.68     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 1.77e-02 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.266e-08   1.831e-08
25- 50  6.282e-08   3.511e-08
50-150  1.378e-07   7.605e-08
15-150  2.333e-07   1.284e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 11.5155        (-4.69279      4.2898)
R1^2/D10^2  : 0.665481        (-0.409868      0.676875)
kT2 [keV]   : 62.8124        (-34.2406      -60.0127)
R2^2/D10^2  : 3.76220E-03    (-0.0033047   0.0527499)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   68.60     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 1.03e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.025e-08   8.775e-09
25- 50  6.553e-08   3.140e-08
50-150  1.961e-07   1.008e-07
15-150  2.819e-07   1.373e-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: 1.14370     ( -0.0847821   0.0839039 )
Norm@50keV  : 1.69302E-02    ( -0.00082139   0.00082012 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   53.46     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 6.09e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 12.62 sec: 1.97295 ( -0.0999714  0.100138 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.20368e-06 ( -1.13652e-07  1.139e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.865640     ( -0.360867   0.307988 )
Epeak [keV] : 231.480      ( -99.3749 -231.49 )
Norm@50keV  : 2.26251E-02    ( -0.00604495   0.00995063 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   51.46     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 6.47e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 12.62 sec: 1.94978 ( -0.10365  0.10373 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.17699e-06 ( -1.20218e-07  1.19436e-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)  = 4.47e-07
S(50-100 keV) = 8.10e-07

T90 vs. Hardness ratio plot

T90                                   = 11.0759998559952 sec.
Hardness ratio (energy fluence ratio) = 1.81208

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.66778
Count Ratio (50-100 keV) / (15-25 keV) = 1.72325

Mask shadow pattern

IMX = 8.734597730554834E-02, IMY = 6.510334254058794E-01

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000

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:
-239.008000 -3.560000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
170.3153 -60.6227   14.0  53.7  -10.5   0.5629   0.8    0.0	Cen X-3                       
186.3062 -62.8432   59.1  52.8  -20.3  -0.1594  -0.2   10.6	GX 301-2                      
213.3802  39.6967    2.7  52.7  170.4   3.8408   4.4 ------	UNKNOWN                       
225.7944  19.6856    2.6  41.9 -162.2   1.8869   4.4 ------	UNKNOWN                       
238.2034 -18.7713    3.0  41.2  -99.5   4.4935   3.8 ------	UNKNOWN

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

Time interval of the image:
-3.560000 9.056000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
170.3371 -60.6221    9.3  53.7  -10.5  -0.1911  -1.2    0.6	Cen X-3                       
186.4472 -62.7552    6.6  52.7  -20.4  -0.3188  -1.8    5.8	GX 301-2                      
189.7591  34.6022    3.0  45.6  146.3   0.6057   3.8 ------	UNKNOWN                       
151.2239 -39.8315    2.4  49.5   19.7   0.6119   4.8 ------	UNKNOWN                       
166.3104 -59.3483    2.3  53.8   -7.6   0.7697   5.0 ------	UNKNOWN                       
227.1696 -26.8804    0.4  33.3  -82.4   3.2218  26.3 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
774.092610 963.122000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
244.9757 -15.6413    0.4  34.9  -88.0  18.8103  29.0    0.2	Sco X-1                       
254.5368  35.2599   50.1  48.1 -168.3  -0.1312  -0.2    6.3	Her X-1                       
167.3040 -11.6461    4.5  50.2   39.6   3.7069   2.6 ------	UNKNOWN                       
239.8314  40.3599    4.0  42.9  175.5   1.3876   2.9 ------	UNKNOWN                       
263.9380  43.6188    3.3  58.6 -172.6   5.5565   3.5 ------	UNKNOWN

Plot creation:
Mon Oct 24 05:12:19 EDT 2022