batgrbproduct analysis for trigger=1202749

batgrbproduct Analysis for Trigger=1202749

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 Mar  9 14:15:25 EST 2024
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1202749
======================================================================

  Trigger: 01202749      Segment: 000

  BAT Trigger Time: 724444574.592   [s; MET]
      Trigger Stop: 724444575.104   [s; MET]
               UTC: 2023-12-16T18:35:42.032980    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 39.7587790592505   Dec: 33.5959734832109  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.94
     Image Trigger?:     NO
     Rate S/N Ratio:     17.606816861659  [ if not an image trigger ]
     Image S/N Ratio:    8.94

  Flight Position:   [ source = BAT ]
    RA: 39.7587790592505   Dec: 33.5959734832109  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 39.777872259361   Dec: 33.6151710870154  [deg; J2000]  
        { 02h 39m 06.7s , +33d 36' 54.6" }
         +/- 2.04845508316876 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.827386591553676 [arcmin] (formal 1-sigma fit error)
    SNR: 10.9200206035495
 
  Angular difference between Flight and Ground position is 1.495704 arcmin
 
  Partial Coding Fraction: 0.59375    [ including projection effects ]

  Duration
     T90: 51.1399999856949 +/- 3.05003085178843
        Measured from: -0.527999997138977
                   to: 50.6119999885559     [s; relative to TRIGTIME]
     T50: 43.1480000019073 +/- 2.6436943518876
        Measured from: 0.991999983787537
                   to: 44.1399999856949     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.508000016212463     
                   to: 0.491999983787537     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -1.12000000476837     
                   to: 51.3600000143051     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.486259   0.575854   0.480620   0.049493
           0.060896   0.063500   0.055361   0.050958 [error]
 Peak      0.047574   0.092767   0.063155   0.027142
           0.010135   0.011287   0.010001   0.008308 [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 1.53e-07 2.64e-07 3.46e-07 9.24e-07 1.01e-06 1.68e-06   erg/cm2
              Error 2.80e-08 3.01e-08 5.40e-08 3.03e-07 1.29e-07 3.48e-07   erg/cm2
Peak flux Power-law 5.69e-01 5.89e-01 4.30e-01 5.05e-01 1.78e+00 2.09e+00   ph/cm2/s
              Error 1.40e-01 9.44e-02 7.76e-02 1.78e-01 2.72e-01 3.17e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.44e-07 2.76e-07 3.54e-07 5.03e-07 9.81e-07 1.28e-06   erg/cm2
              Error 3.28e-08 3.76e-08 5.85e-08 4.14e-07 1.40e-07 4.49e-07   erg/cm2
Peak flux Cutoff-PL 4.63e-01 6.80e-01 4.70e-01 1.40e-01 1.72e+00 1.75e+00   ph/cm2/s
              Error 1.63e-01 1.31e-01 9.61e-02 1.81e-01 2.79e-01 3.20e-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    1.608    0.197    -      -           2.07e-03 2.44e-04   45.700 57
CPL   1.198    0.758      96.0  -29.1      3.36e-03 3.62e-03   44.810 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.454    0.234    -      -           1.45e-02 2.19e-03   54.190 57
CPL   0.081    1.432      67.0   54.4      7.58e-02 3.14e-01   49.730 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: 52.160000 sec.
T50 in the 50-300 keV band: 42.432000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   52.480   -1.120   51.360
T90    51.140   -0.528   50.612
T50    43.148    0.992   44.140
Peak    1.000   -0.508    0.492

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
   39.7779    33.6152   0.0177    38.7215    -8.3340         0.6959546     10.920 TRIG_01202749                 
 
Foreground time interval of the image:
 -1.120  10.109 (delta_t =  11.229 [sec])
Background time interval of the image:
-56.891  -1.120 (delta_t =  55.771 [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 0.512000

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 0.512000

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 0.512000

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   -1.120 sec. to   51.360 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.60840     ( -0.194839   0.199162 )
Norm@50keV  : 2.06673E-03    ( -0.000245323   0.000242588 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   45.70     using 59 bins.
 Reduced chi-squared = 0.801754
# Null hypothesis probability of 8.59e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 52.48 sec: 0.266289 ( -0.030204  0.030244 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.01348e-06 ( -1.28355e-07  1.29805e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from   -1.120 sec. to   51.360 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.19829     ( -0.863032   0.65306 )
Epeak [keV] : 95.9637      ( -37.8162 -95.9637 )
Norm@50keV  : 3.36098E-03    ( -0.00149151   0.00574341 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   44.81     using 59 bins.
 Reduced chi-squared = 0.800179
# Null hypothesis probability of 8.58e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 52.48 sec: 0.261708 ( -0.031447  0.031338 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.83612e-07 ( -1.38929e-07  1.40149e-07 ) ergs/cm2

Band function

Time interval is from   -1.120 sec. to   51.360 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]    : 14.1553  (-1.89804  2.23599)
R^2/D10^2   : 3.63513E-02  (-0.0148392   0.0245278)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   62.07     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 3.00e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.066e-08   1.889e-08
25- 50  3.033e-07   4.760e-08
50-150  4.024e-07   9.305e-08
15-150  7.863e-07   1.299e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 168.651       (-67.9377      -168.651)
Norm        : 1.09303       (-0.130531     0.152237)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   44.87     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 8.78e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.457e-07   7.972e-08
25- 50  2.745e-07   1.469e-07
50-150  5.675e-07   3.162e-07
15-150  9.877e-07   5.288e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.02756        (-2.18406      2.95651)
R1^2/D10^2  : 0.872100        (-0.747319      11.3741)
kT2 [keV]   : 20.0847        (-4.54428      12.7555)
R2^2/D10^2  : 8.89695E-03    (-0.00775633   0.0146907)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   45.42     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 8.18e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.500e-07   7.651e-08
25- 50  2.564e-07   9.145e-08
50-150  5.449e-07   2.416e-07
15-150  9.513e-07   3.670e-07

Peak spectrum fit

Power-law model

Time interval is from   -0.508 sec. to    0.492 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.45358     ( -0.233655   0.234691 )
Norm@50keV  : 1.44630E-02    ( -0.00219142   0.00218391 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   54.19     using 59 bins.
 Reduced chi-squared = 0.950702
# Null hypothesis probability of 5.81e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 1.78398 ( -0.2716  0.27217 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.38331e-07 ( -2.25306e-08  2.2741e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.508 sec. to    0.492 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 8.06125E-02     ( -1.7218   1.14172 )
Epeak [keV] : 67.0294      ( -16.1528 92.7463 )
Norm@50keV  : 7.57985E-02    ( -0.0758352   0.55273 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   49.73     using 59 bins.
 Reduced chi-squared = 0.888036
# Null hypothesis probability of 7.10e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 1.71980 ( -0.2797  0.27901 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.26145e-07 ( -2.53799e-08  2.5595e-08 ) ergs/cm2

Band function

Time interval is from   -0.508 sec. to    0.492 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]    : 14.0944  (-2.06668  2.57528)
R^2/D10^2   : 0.271431  (-0.123632   0.207112)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   52.44     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 6.47e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.138e-08   3.128e-09
25- 50  4.262e-08   8.915e-09
50-150  5.594e-08   1.720e-08
15-150  1.099e-07   2.177e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (-83.9379      -199.363)
Norm        : 7.42928       (-1.10034     1.10042)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   52.71     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 6.37e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.850e-08   1.037e-08
25- 50  3.559e-08   2.005e-08
50-150  7.805e-08   4.377e-08
15-150  1.321e-07   7.440e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 10.7347        (-3.57289      3.33548)
R1^2/D10^2  : 0.547242        (-0.280378      0.814673)
kT2 [keV]   : 37.5695        (-35.3047      -42.7583)
R2^2/D10^2  : 4.48320E-03    (-0.00293875   0.0800793)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   47.32     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 7.59e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.396e-08   8.185e-09
25- 50  4.161e-08   2.492e-08
50-150  7.334e-08   3.882e-08
15-150  1.289e-07   6.720e-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: 1.47208     ( -0.213556   0.214261 )
Norm@50keV  : 4.29557E-03    ( -0.000569666   0.000567831 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   49.22     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 7.58e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 11.23 sec: 0.532331 ( -0.0713273  0.0715091 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.5979e-07 ( -6.56117e-08  6.62742e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.291399     ( -1.26778   0.972809 )
Epeak [keV] : 71.6186      ( -16.5132 97.5422 )
Norm@50keV  : 1.70794E-02    ( -0.0170794   0.0557731 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   44.77     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 8.59e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 11.23 sec: 0.509327 ( -0.074222  0.074204 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.25058e-07 ( -7.07366e-08  7.25885e-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)  = 2.64e-07
S(50-100 keV) = 3.46e-07

T90 vs. Hardness ratio plot

T90                                   = 51.1399999856949 sec.
Hardness ratio (energy fluence ratio) = 1.31061

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.18425
Count Ratio (50-100 keV) / (15-25 keV) = 0.988403

Mask shadow pattern

IMX = 7.933018136795843E-01, IMY = 1.162109312197978E-01

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.512000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.512000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.512000

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:
-56.891410 -1.120000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6354  22.0429    0.8  22.3   71.3   2.3435  15.2    1.7	Crab                          
 67.5883  47.9083    2.5  42.6   30.4   1.1321   4.7 ------	UNKNOWN                       
 28.8854  51.6369    2.4  56.6    3.0   2.6738   4.8 ------	UNKNOWN                       
 56.7704  -9.0195    2.4  18.4 -110.2   0.5924   4.7 ------	UNKNOWN                       
 25.6088  15.9678    2.2  43.2  -41.2   1.2926   5.2 ------	UNKNOWN

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

Time interval of the image:
-1.120000 10.108600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.5884  22.1499    5.4  22.4   71.1   0.1240   2.1    8.5	Crab                          
 39.7779  33.6152    1.1  38.7   -8.3   0.6959  10.9 ------	UNKNOWN                       
 40.8928  18.6346    2.4  29.8  -30.1   0.2539   4.8 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
112.708590 714.368000
720.408000 837.726200
840.408000 962.511800
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 78.4881  32.9166    3.4  32.2   77.4   7.7339   3.4 ------	UNKNOWN                       
 42.1788   3.4336    2.4  30.3  172.4   6.4577   4.8 ------	UNKNOWN

Plot creation:
Sat Mar  9 15:20:29 EST 2024