batgrbproduct analysis for trigger=1250282

batgrbproduct Analysis for Trigger=1250282

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): Sat Oct 19 14:56:05 EDT 2024
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1250282
======================================================================

  Trigger: 01250282      Segment: 000

  BAT Trigger Time: 746154239.552   [s; MET]
      Trigger Stop: 746154243.648   [s; MET]
               UTC: 2024-08-24T01:03:25.505660    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 213.203243173578   Dec: 63.7370123171326  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9.89
     Image Trigger?:     NO
     Rate S/N Ratio:     9.8488578017961  [ if not an image trigger ]
     Image S/N Ratio:    9.89

  Flight Position:   [ source = BAT ]
    RA: 213.203243173578   Dec: 63.7370123171326  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 213.176669085478   Dec: 63.7344625966156  [deg; J2000]  
        { 14h 12m 42.4s , +63d 44' 04.1" }
         +/- 1.36301958437835 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.547278209367549 [arcmin] (formal 1-sigma fit error)
    SNR: 19.5421583738244
 
  Angular difference between Flight and Ground position is 0.721956 arcmin
 
  Partial Coding Fraction: 0.7265625    [ including projection effects ]

  Duration
     T90: 39.4399999380112 +/- 3.42753313033483
        Measured from: 0.607999920845032
                   to: 40.0479998588562     [s; relative to TRIGTIME]
     T50: 23.6039999723434 +/- 2.92105462217731
        Measured from: 6.30799996852875
                   to: 29.9119999408722     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.0200001001358032     
                   to: 0.979999899864197     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.656000018119812     
                   to: 43.1679999828339     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.468650   0.625097   0.611243   0.187698
           0.047510   0.049640   0.042723   0.035570 [error]
 Peak      0.016293   0.021458   0.037383   0.021146
           0.007293   0.007602   0.006799   0.005453 [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 1.36e-07 2.80e-07 4.51e-07 1.61e-06 1.25e-06 2.48e-06   erg/cm2
              Error 2.05e-08 2.48e-08 4.10e-08 3.36e-07 1.03e-07 3.58e-07   erg/cm2
Peak flux Power-law 1.32e-01 1.96e-01 2.18e-01 4.59e-01 6.85e-01 1.00e+00   ph/cm2/s
              Error 7.30e-02 6.75e-02 4.97e-02 2.27e-01 1.74e-01 2.44e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.36e-07 2.79e-07 4.47e-07 1.67e-06 1.25e-06 2.47e-06   erg/cm2
              Error 2.05e-08 2.67e-08 4.56e-08 4.45e-07 1.11e-07 4.46e-07   erg/cm2
Peak flux Cutoff-PL 6.86e-02 1.82e-01 2.58e-01 1.93e-01 6.28e-01 7.04e-01   ph/cm2/s
              Error 9.61e-02 9.17e-02 8.20e-02 2.68e-01 1.97e-01 3.84e-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    1.316    0.138    -      -           2.89e-03 2.20e-04   47.330 57
CPL   1.313    0.282    10000.0    0.0      2.90e-03 2.21e-04   47.350 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.846    0.422    -      -           5.97e-03 1.55e-03   57.460 57
CPL  -0.674    3.673     119.1  -38.1      2.09e-02 6.00e-01   56.330 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: 41.536000 sec.
T50 in the 50-300 keV band: 20.288000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   43.824   -0.656   43.168
T90    39.440    0.608   40.048
T50    23.604    6.308   29.912
Peak    1.000   -0.020    0.980

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
  213.1767    63.7345   0.0099    32.4242   176.2868         1.6736634     19.542 TRIG_01250282                 
 
Foreground time interval of the image:
 -0.656  35.549 (delta_t =  36.205 [sec])
Background time interval of the image:
-239.552  -0.656 (delta_t = 238.896 [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 4.096000

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 4.096000

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 4.096000

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   -0.656 sec. to   43.168 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.31640     ( -0.138946   0.137407 )
Norm@50keV  : 2.89025E-03    ( -0.000219858   0.00021985 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   47.33     using 59 bins.
 Reduced chi-squared = 0.830351
# Null hypothesis probability of 8.16e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 43.82 sec: 0.345882 ( -0.02794  0.028044 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.24676e-06 ( -1.0232e-07  1.02803e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.656 sec. to   43.168 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.31269     ( -0.38543   0.178015 )
Epeak [keV] : 1.00000E+04      ( -10000 -10000 )
Norm@50keV  : 2.90209E-03    ( -0.000220729   0.000220733 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   47.35     using 59 bins.
 Reduced chi-squared = 0.845536
# Null hypothesis probability of 7.88e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 43.82 sec: 0.345822 ( -0.02794  0.028014 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.24952e-06 ( -1.13796e-07  1.08427e-07 ) ergs/cm2

Band function

Time interval is from   -0.656 sec. to   43.168 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]    : 18.9498  (-1.93399  2.23536)
R^2/D10^2   : 1.80138E-02  (-0.00565633   0.00800048)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   94.52     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 1.32e-03 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.577e-08   8.676e-09
25- 50  2.677e-07   3.146e-08
50-150  7.062e-07   9.356e-08
15-150  1.030e-06   9.816e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-21.5768      -200)
Norm        : 1.44898       (-0.111526     0.111526)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   58.18     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 4.32e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.582e-07   1.369e-08
25- 50  3.042e-07   4.145e-08
50-150  6.672e-07   1.881e-07
15-150  1.130e-06   2.450e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.52438        (-1.61341      2.07222)
R1^2/D10^2  : 0.425824        (-0.260187      0.83672)
kT2 [keV]   : 29.6943        (-5.55489      10.7799)
R2^2/D10^2  : 3.51685E-03    (-0.0021989   0.0036089)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   48.60     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 7.16e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.393e-07   5.751e-08
25- 50  2.717e-07   7.870e-08
50-150  8.396e-07   2.500e-07
15-150  1.251e-06   3.216e-07

Peak spectrum fit

Power-law model

Time interval is from   -0.020 sec. to    0.980 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.845616     ( -0.445982   0.398427 )
Norm@50keV  : 5.96656E-03    ( -0.00157938   0.00151278 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   57.46     using 59 bins.
 Reduced chi-squared = 1.00807
# Null hypothesis probability of 4.58e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 0.684949 ( -0.172287  0.175993 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.84305e-08 ( -1.579e-08  1.57943e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.020 sec. to    0.980 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.674135     ( -5.61404   1.73196 )
Epeak [keV] : 119.089      ( -41.0004 -117.219 )
Norm@50keV  : 2.08927E-02    ( -0.0221895   1.17788 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   56.33     using 59 bins.
 Reduced chi-squared = 1.00589
# Null hypothesis probability of 4.63e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 0.628201 ( -0.1951  0.199153 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.62567e-08 ( -1.80208e-08  1.66673e-08 ) ergs/cm2

Band function

Time interval is from   -0.020 sec. to    0.980 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]    : 26.4193  (-6.06061  10.0799)
R^2/D10^2   : 1.50385E-02  (-0.00939333   0.0193722)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   56.34     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 5.00e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.769e-09   9.785e-10
25- 50  1.032e-08   5.040e-09
50-150  5.286e-08   2.701e-08
15-150  6.495e-08   3.032e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-58.2107      -200)
Norm        : 2.94285       (-0.732086     0.732086)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   66.28     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 1.87e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.336e-09   4.464e-09
25- 50  1.411e-08   8.270e-09
50-150  3.095e-08   1.850e-08
15-150  5.240e-08   3.033e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 1.50992        (-1.44407      2.91318)
R1^2/D10^2  : 3894.08        (-4741.51      0)
kT2 [keV]   : 27.4558        (-6.44528      11.1364)
R2^2/D10^2  : 1.31624E-02    (-0.00842555   0.0176744)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   53.23     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 5.43e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.819e-09   1.498e-09
25- 50  9.726e-09   5.644e-09
50-150  5.326e-08   3.130e-08
15-150  6.681e-08   3.090e-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: 1.36371     ( -0.142937   0.142062 )
Norm@50keV  : 3.09273E-03    ( -0.00024309   0.000243028 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   47.34     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 8.15e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 36.2 sec: 0.373651 ( -0.0309906  0.0311035 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.09014e-06 ( -9.31165e-08  9.36697e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.36246     ( -0.472548   0.14141 )
Epeak [keV] : 9999.36      ( -9999.36 -9999.36 )
Norm@50keV  : 3.10248E-03    ( -0.000243642   0.00196439 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   47.35     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 7.88e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 36.2 sec: 0.373907 ( -0.01603  0.03015 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.09023e-06 ( -9.41381e-08  9.29037e-08 ) 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)  = 2.80e-07
S(50-100 keV) = 4.51e-07

T90 vs. Hardness ratio plot

T90                                   = 39.4399999380112 sec.
Hardness ratio (energy fluence ratio) = 1.61071

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.33382
Count Ratio (50-100 keV) / (15-25 keV) = 1.30426

Mask shadow pattern

IMX = -6.338793116353315E-01, IMY = -4.113737309992058E-02

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000

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:
-239.552000 -0.656000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6087  22.0279    1.0  53.5    4.5   8.6583  11.4    1.6	Crab                          
 74.2882  62.4872    3.2  25.7   55.5   1.4811   3.6 ------	UNKNOWN                       
 84.3655  33.4313    4.2  43.0   10.5   1.3734   2.7 ------	UNKNOWN                       
219.5196  45.7843    3.0  48.0 -168.6   2.7213   3.8 ------	UNKNOWN

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

Time interval of the image:
-0.656000 35.548610
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.7509  22.0641    5.8  53.4    4.4   0.5431   2.0    7.2	Crab                          
213.1767  63.7345    0.6  32.4  176.3   1.6739  19.5 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
116.548600 962.608000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.4482  35.3400  297.7  37.8  141.8   0.0876   0.0    0.5	Her X-1                       
255.8824  30.1538    2.2  43.0  143.8  15.4552   5.2 ------	UNKNOWN                       
225.6226  32.7795    3.0  31.9 -176.9   4.7329   3.8 ------	UNKNOWN                       
 96.3628  70.6416    2.7  38.7   -5.1   5.6289   4.3 ------	UNKNOWN                       
219.9110  11.4401    2.9  52.5 -165.2  12.1185   4.0 ------	UNKNOWN

Plot creation:
Sat Oct 19 18:18:16 EDT 2024