batgrbproduct analysis for trigger=1125809

batgrbproduct Analysis for Trigger=1125809

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): Wed Jun 14 12:22:37 EDT 2023
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1125809
======================================================================

  Trigger: 01125809      Segment: 000

  BAT Trigger Time: 686229142.08   [s; MET]
      Trigger Stop: 686229143.104   [s; MET]
               UTC: 2022-09-30T11:11:52.128760    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 64.7373600672291   Dec: 13.3517442973112  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.33
     Image Trigger?:     NO
     Rate S/N Ratio:     41.206795556073  [ if not an image trigger ]
     Image S/N Ratio:    7.33

  Flight Position:   [ source = BAT ]
    RA: 64.7373600672291   Dec: 13.3517442973112  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 64.7278987133664   Dec: 13.3505427647535  [deg; J2000]  
        { 04h 18m 54.7s , +13d 21' 02.0" }
         +/- 1.67469535989671 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.733363629102995 [arcmin] (formal 1-sigma fit error)
    SNR: 14.5616326220971
 
  Angular difference between Flight and Ground position is 0.557023 arcmin
 
  Partial Coding Fraction: 0.1103516    [ including projection effects ]

  Duration
     T90: 182.095999956131 +/- 95.8901187601642
        Measured from: -1.30400002002716
                   to: 180.791999936104     [s; relative to TRIGTIME]
     T50: 60.864000082016 +/- 22.9323331127479
        Measured from: 1.49599993228912
                   to: 62.3600000143051     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.484000086784363     
                   to: 0.515999913215637     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -3.41600000858307     
                   to: 224.199999928474     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.915492   3.265906   2.505995   0.753369
           0.196245   0.207046   0.185951   0.154441 [error]
 Peak      0.131604   0.289576   0.268082   0.122741
           0.032331   0.037352   0.037634   0.030254 [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 7.69e-07 1.43e-06 2.05e-06 6.24e-06 5.85e-06 1.05e-05   erg/cm2
              Error 9.77e-08 1.11e-07 1.81e-07 1.18e-06 4.46e-07 1.31e-06   erg/cm2
Peak flux Power-law 1.70e+00 1.94e+00 1.59e+00 2.17e+00 6.02e+00 7.40e+00   ph/cm2/s
              Error 5.06e-01 3.61e-01 2.75e-01 7.73e-01 9.95e-01 1.16e+00   ph/cm2/s
 
Fluence   Cutoff-PL 7.28e-07 1.48e-06 2.11e-06 4.03e-06 5.74e-06 8.33e-06   erg/cm2
              Error 1.16e-07 1.33e-07 2.03e-07 2.23e-06 4.78e-07 2.30e-06   erg/cm2
Peak flux Cutoff-PL 1.53e+00 2.01e+00 1.68e+00 1.42e+00 5.94e+00 6.65e+00   ph/cm2/s
              Error 6.20e-01 4.09e-01 3.55e-01 -------- 1.01e+00 1.59e+00   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    1.480    0.121    -      -           2.70e-03 1.92e-04   54.180 57
CPL   1.171    0.448     139.2  -40.5      3.83e-03 2.16e-03   52.950 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.290    0.259    -      -           5.05e-02 7.88e-03   73.830 57
CPL   0.836    0.957     143.0    0.0      8.22e-02 1.41e-01   73.340 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: 73.472000 sec.
T50 in the 50-300 keV band: 17.344000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  227.616   -3.416  224.200
T90   182.096   -1.304  180.792
T50    60.864    1.496   62.360
Peak    1.000   -0.484    0.516

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
   64.7279    13.3505   0.0133    50.5685    15.9005         5.0384774     14.562 TRIG_01125809                 
 
Foreground time interval of the image:
 -3.416  15.421 (delta_t =  18.837 [sec])
Background time interval of the image:
-68.379  -3.416 (delta_t =  64.963 [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

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   -3.416 sec. to  224.200 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.48018     ( -0.12138   0.121448 )
Norm@50keV  : 2.69768E-03    ( -0.000192386   0.00019209 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   54.18     using 59 bins.
 Reduced chi-squared = 0.950526
# Null hypothesis probability of 5.82e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 227.6 sec: 0.335021 ( -0.024981  0.025039 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.8447e-06 ( -4.45092e-07  4.47061e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from   -3.416 sec. to  224.200 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.17107     ( -0.527404   0.368061 )
Epeak [keV] : 139.202      ( -58.1872 -139.205 )
Norm@50keV  : 3.83306E-03    ( -0.00126577   0.00304799 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   52.95     using 59 bins.
 Reduced chi-squared = 0.945536
# Null hypothesis probability of 5.91e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 227.6 sec: 0.330833 ( -0.025795  0.025823 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.74107e-06 ( -4.80509e-07  4.76089e-07 ) ergs/cm2

Band function

Time interval is from   -3.416 sec. to  224.200 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]    : 15.3792  (-1.34843  1.51948)
R^2/D10^2   : 3.50950E-02  (-0.00999515   0.0136042)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   94.78     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 1.24e-03 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.938e-07   5.303e-08
25- 50  1.601e-06   1.537e-07
50-150  2.605e-06   3.368e-07
15-150  4.599e-06   4.120e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-37.5192      -200)
Norm        : 1.37863       (-0.0980205     0.0980205)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   54.21     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 5.80e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.848e-07   6.771e-08
25- 50  1.510e-06   1.312e-07
50-150  3.311e-06   9.822e-07
15-150  5.606e-06   9.480e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 9.40481        (-1.80678      1.88991)
R1^2/D10^2  : 0.145177        (-0.0616789      0.131602)
kT2 [keV]   : 40.1394        (-12.9901      53.3505)
R2^2/D10^2  : 9.58899E-04    (-0.000838451   0.00261329)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   50.08     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 6.63e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.264e-07   1.466e-07
25- 50  1.630e-06   3.729e-07
50-150  3.542e-06   1.500e-06
15-150  5.799e-06   1.817e-06

Peak spectrum fit

Power-law model

Time interval is from   -0.484 sec. to    0.516 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.28990     ( -0.261477   0.257337 )
Norm@50keV  : 5.05418E-02    ( -0.00788832   0.00787258 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   73.83     using 59 bins.
 Reduced chi-squared = 1.29526
# Null hypothesis probability of 6.63e-02 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 6.01876 ( -0.9924  0.99734 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.00749e-07 ( -8.21193e-08  8.23603e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.484 sec. to    0.516 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.836460     ( -1.32504   0.589216 )
Epeak [keV] : 143.030      ( -143.064 -143.064 )
Norm@50keV  : 8.22138E-02    ( -0.038411   0.24284 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   73.34     using 59 bins.
 Reduced chi-squared = 1.30964
# Null hypothesis probability of 5.99e-02 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 5.93543 ( -1.01063  1.01645 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.93696e-07 ( -8.64095e-08  8.47729e-08 ) ergs/cm2

Band function

Time interval is from   -0.484 sec. to    0.516 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]    : 18.1621  (-3.21675  4.0876)
R^2/D10^2   : 0.385255  (-0.193629   0.364785)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   80.18     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 2.32e-02 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.537e-08   8.415e-09
25- 50  1.181e-07   3.093e-08
50-150  2.835e-07   6.935e-08
15-150  4.269e-07   9.285e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-55.4227      -200)
Norm        : 25.4630       (-4.01161     4.01161)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   76.65     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 4.23e-02 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.341e-08   3.691e-08
25- 50  1.220e-07   6.785e-08
50-150  2.675e-07   1.499e-07
15-150  4.529e-07   2.598e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 11.8055        (-5.0281      4.96728)
R1^2/D10^2  : 1.26047        (-0.781337      1.05708)
kT2 [keV]   : 65.6927        (-60.4482      -67.2925)
R2^2/D10^2  : 5.09572E-03    (-0.00376921   0.137533)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   72.17     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 6.01e-02 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.065e-08   2.446e-08
25- 50  1.248e-07   7.280e-08
50-150  3.082e-07   1.662e-07
15-150  4.737e-07   2.470e-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: 1.32051     ( -0.12786   0.126544 )
Norm@50keV  : 1.99897E-02    ( -0.00151112   0.00151016 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   48.15     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 7.92e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 18.84 sec: 2.39407 ( -0.193541  0.19411 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.70328e-06 ( -2.93678e-07  2.94217e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.06002     ( -0.539531   0.325342 )
Epeak [keV] : 199.498      ( -199.512 -199.512 )
Norm@50keV  : 2.64904E-02    ( -0.00765859   0.0201807 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   47.33     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 7.89e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 18.84 sec: 2.37226 ( -0.1973  0.19798 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.66966e-06 ( -3.06037e-07  3.03343e-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)  = 1.43e-06
S(50-100 keV) = 2.05e-06

T90 vs. Hardness ratio plot

T90                                   = 182.095999956131 sec.
Hardness ratio (energy fluence ratio) = 1.43357

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.705
Count Ratio (50-100 keV) / (15-25 keV) = 1.30828

Mask shadow pattern

IMX = 1.169526350298008E+00, IMY = -3.331601940831920E-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:
-68.379400 -3.416000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
326.1675  38.3219   56.1  39.2 -145.5   0.0418   0.2    0.2	Cyg X-2                       
 16.3491  -4.9384    2.6  34.6   92.5   1.3949   4.4 ------	UNKNOWN                       
 43.5715  39.7558    2.4  27.2  -21.5   0.6487   4.8 ------	UNKNOWN                       
338.1355  47.3097    3.4  32.0 -127.7   0.6256   3.4 ------	UNKNOWN                       
308.8763  41.6273    2.0  52.1 -139.3   3.5199   5.7 ------	UNKNOWN                       
 57.4781  66.3005    2.2  45.6  -57.8   3.1464   5.1 ------	UNKNOWN

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

Time interval of the image:
-3.416000 15.420600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
326.1782  38.3260   65.8  39.2 -145.5   0.0180   0.2    0.4	Cyg X-2                       
340.3496  -9.0510    2.3  49.6  142.9   1.5723   5.0 ------	UNKNOWN                       
 64.7279  13.3506    0.8  50.6   15.9   5.0373  14.6 ------	UNKNOWN                       
319.9749  22.8146    2.6  47.4 -166.3   0.5719   4.5 ------	UNKNOWN                       
313.0898  26.8842    2.6  52.0 -158.6   0.8428   4.4 ------	UNKNOWN                       
346.7231  67.4966    3.1  41.0  -95.9   1.0655   3.7 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
156.820600 717.858300
720.920000 963.110800
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6218  22.0320    0.5  20.0 -113.2  31.3247  23.4    1.2	Crab                          
104.8092  -8.8654    2.8  45.6  -57.8  25.3233   4.1 ------	UNKNOWN

Plot creation:
Wed Jun 14 13:59:53 EDT 2023