batgrbproduct analysis for trigger=1044236

batgrbproduct Analysis for Trigger=1044236

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): Fri Jul 29 23:31:18 EDT 2022
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1044236
======================================================================

  Trigger: 01044236      Segment: 000

  BAT Trigger Time: 640567696   [s; MET]
      Trigger Stop: 640567760   [s; MET]
               UTC: 2021-04-19T23:27:49.124960    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 212.967782252655   Dec: 35.9985418752642  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    12.81
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    12.81

  Flight Position:   [ source = BAT ]
    RA: 212.967782252655   Dec: 35.9985418752642  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 212.961104221361   Dec: 35.9952863248875  [deg; J2000]  
        { 14h 11m 50.7s , +35d 59' 43.0" }
         +/- 1.69728304086601 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.02883628737264 [arcmin] (formal 1-sigma fit error)
    SNR: 14.2855837531291
 
  Angular difference between Flight and Ground position is 0.378473 arcmin
 
  Partial Coding Fraction: 0.71875    [ including projection effects ]

  Duration
     T90: 54.4919998645782 +/- 12.0104655973999
        Measured from: 26.2640000581741
                   to: 80.7559999227524     [s; relative to TRIGTIME]
     T50: 16.7919999361038 +/- 10.5560464329482
        Measured from: 40.8159999847412
                   to: 57.607999920845     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 47.972000002861     
                   to: 48.972000002861     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 11.960000038147     
                   to: 88.7799999713898     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.692219   0.681621   0.182173   0.071353
           0.065066   0.066559   0.057263   0.049632 [error]
 Peak      0.031525   0.041424   0.016436   0.001344
           0.007691   0.007958   0.006823   0.005429 [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 2.44e-07 2.57e-07 1.91e-07 2.30e-07 7.84e-07 9.22e-07   erg/cm2
              Error 3.65e-08 3.38e-08 5.04e-08 1.14e-07 1.16e-07 1.84e-07   erg/cm2
Peak flux Power-law 3.42e-01 2.76e-01 1.50e-01 1.20e-01 8.21e-01 8.87e-01   ph/cm2/s
              Error 1.21e-01 6.44e-02 5.66e-02 9.00e-02 1.93e-01 2.10e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.35e-07 2.80e-07 1.69e-07 5.45e-08 7.24e-07 7.39e-07   erg/cm2
              Error 3.95e-08 4.46e-08 6.39e-08 1.03e-07 1.25e-07 1.73e-07   erg/cm2
Peak flux Cutoff-PL 3.21e-01 2.16e-01 9.87e-02 7.33e-02 6.66e-01 7.11e-01   ph/cm2/s
              Error 1.39e-01 1.10e-01 6.81e-02 6.13e-02 3.84e-01 3.41e-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    2.426    0.259    -      -           1.04e-03 1.99e-04   56.590 57
CPL   1.611    0.905      17.6   14.9      3.33e-03 1.23e-02   55.040 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.877    0.460    -      -           5.78e-03 1.65e-03   76.210 57
CPL   2.261    0.541     100.8   -0.0      3.56e-03 1.39e-02   75.780 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   76.820   11.960   88.780
T90    54.492   26.264   80.756
T50    16.792   40.816   57.608
Peak    1.000   47.972   48.972

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
  212.9611    35.9953   0.0134    32.4196   -22.1333         1.6556148     14.286 TRIG_01044236                 
 
Foreground time interval of the image:
 11.960  72.501 (delta_t =  60.541 [sec])
Background time interval of the image:
-203.899  11.960 (delta_t = 215.859 [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   11.960 sec. to   88.780 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.42570     ( -0.245422   0.272017 )
Norm@50keV  : 1.03667E-03    ( -0.000200566   0.000197202 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   56.59     using 59 bins.
 Reduced chi-squared = 0.992807
# Null hypothesis probability of 4.91e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 76.82 sec: 0.194760 ( -0.022761  0.022761 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.81674e-07 ( -1.13877e-07  1.17956e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from   11.960 sec. to   88.780 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.61098     ( -1.41116   0.398179 )
Epeak [keV] : 17.5623      ( -15.0695 14.6765 )
Norm@50keV  : 3.33265E-03    ( -0.00180141   0.0228322 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   55.04     using 59 bins.
 Reduced chi-squared = 0.982857
# Null hypothesis probability of 5.11e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 76.82 sec: 0.189889 ( -0.023447  0.023577 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.2416e-07 ( -1.18743e-07  1.32097e-07 ) ergs/cm2

Band function

Time interval is from   11.960 sec. to   88.780 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]    : 7.81820  (-1.01424  1.1334)
R^2/D10^2   : 0.230840  (-0.0975114   0.176286)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   65.32     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 2.10e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.926e-07   3.995e-08
25- 50  3.238e-07   5.800e-08
50-150  7.877e-08   3.148e-08
15-150  5.951e-07   1.022e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 35.4177       (-9.06121      13.3951)
Norm        : 1.36668       (-0.298376     0.409385)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   55.20     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 5.43e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.305e-07   3.576e-08
25- 50  2.869e-07   4.828e-08
50-150  1.932e-07   7.924e-08
15-150  7.106e-07   1.197e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 2.86937        (-1.47386      2.53194)
R1^2/D10^2  : 11.4031        (-10.6298      2771.41)
kT2 [keV]   : 10.1353        (-2.02046      5.16702)
R2^2/D10^2  : 6.75236E-02    (-0.0589194   0.113959)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   54.67     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 4.87e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.325e-07   1.172e-07
25- 50  2.916e-07   1.498e-07
50-150  1.499e-07   8.767e-08
15-150  6.740e-07   3.110e-07

Peak spectrum fit

Power-law model

Time interval is from   47.972 sec. to   48.972 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.87677     ( -0.436885   0.483855 )
Norm@50keV  : 5.77815E-03    ( -0.00170785   0.0015984 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   76.21     using 59 bins.
 Reduced chi-squared = 1.33702
# Null hypothesis probability of 4.55e-02 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 0.821217 ( -0.192549  0.192673 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.31276e-08 ( -1.48134e-08  1.52935e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   47.972 sec. to   48.972 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.26113     ( -0.598576   0.483741 )
Epeak [keV] : 100.789      ( -9999.32 -9999.33 )
Norm@50keV  : 3.56048E-03    ( -0.00167181   0.026067 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   75.78     using 59 bins.
 Reduced chi-squared = 1.35321
# Null hypothesis probability of 4.03e-02 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 0.665916 ( -0.29162  0.475754 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.8463e-08 ( -2.09435e-08  1.51169e-08 ) ergs/cm2

Band function

Time interval is from   47.972 sec. to   48.972 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]    : 9.43100  (-2.31052  3.53196)
R^2/D10^2   : 0.472079  (-0.333738   0.932089)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   82.37     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 1.56e-02 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.359e-09   4.655e-09
25- 50  1.908e-08   9.547e-09
50-150  8.386e-09   5.407e-09
15-150  3.583e-08   1.539e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 88.8909       (-50.5508      -88.9222)
Norm        : 3.70835       (-1.12124     1.91164)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   77.13     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 3.91e-02 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.672e-09   3.652e-09
25- 50  1.631e-08   7.868e-09
50-150  2.465e-08   2.005e-08
15-150  5.064e-08   2.997e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.21983        (-3.30409      2.95954)
R1^2/D10^2  : 1.12611        (-0.721079      6.96155)
kT2 [keV]   : 47.4475        (-43.5779      -60.2922)
R2^2/D10^2  : 1.21276E-03    (-0.000698043   0.0397513)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   75.86     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 3.26e-02 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.004e-08   6.005e-09
25- 50  1.635e-08   9.700e-09
50-150  2.830e-08   1.683e-08
15-150  5.469e-08   2.809e-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: 2.38037     ( -0.242345   0.268027 )
Norm@50keV  : 1.19275E-03    ( -0.000226253   0.000221901 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   52.65     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 6.39e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 60.54 sec: 0.218179 ( -0.0256846  0.0256846 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.01301e-07 ( -1.02579e-07  1.06234e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.56310     ( -1.4165   0.437489 )
Epeak [keV] : 19.9628      ( -19.5754 13.9865 )
Norm@50keV  : 3.81127E-03    ( -0.00214237   0.0262655 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   50.96     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 6.66e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 60.54 sec: 0.212674 ( -0.026435  0.026568 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.50206e-07 ( -1.08248e-07  1.22696e-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)  = 2.57e-07
S(50-100 keV) = 1.91e-07

T90 vs. Hardness ratio plot

T90                                   = 54.4919998645782 sec.
Hardness ratio (energy fluence ratio) = 0.743191

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 0.98469
Count Ratio (50-100 keV) / (15-25 keV) = 0.263172

Mask shadow pattern

IMX = 5.882977985748454E-01, IMY = 2.392812365451210E-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:
-203.899390 11.960000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
161.3357  23.4290    3.0  32.3 -116.0   1.4078   3.8 ------	UNKNOWN

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

Time interval of the image:
11.960000 72.500590
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
183.3775 -12.3301    2.9  23.7  146.6   0.4245   4.0 ------	UNKNOWN                       
217.9949  35.5287    2.6  35.0  -16.3   0.5639   4.4 ------	UNKNOWN                       
212.9611  35.9954    0.8  32.4  -22.1   1.6548  14.3 ------	UNKNOWN                       
228.8389  41.2229    2.4  45.2  -15.3   0.8059   4.8 ------	UNKNOWN                       
154.2576  18.6884    1.7  37.6 -126.8   1.1509   6.6 ------	UNKNOWN                       
149.1931  26.6425    2.2  43.8 -116.2   2.1575   5.2 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
136.100600 408.100600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.5446  35.4389   73.8  33.5  -18.0   0.0500   0.2    7.2	Her X-1                       
209.3279  14.7456    2.5  21.5   93.3   1.4814   4.6 ------	UNKNOWN                       
213.1117  39.3191    2.7   3.3  -94.4   0.9888   4.3 ------	UNKNOWN                       
275.1574  23.9230    2.3  54.3  -11.8   3.8642   5.1 ------	UNKNOWN                       
141.2798  48.3952    3.7  52.5 -148.9   2.5935   3.1 ------	UNKNOWN                       
270.0378  63.6232    2.8  43.8  -63.7   4.6163   4.1 ------	UNKNOWN

Plot creation:
Sat Jul 30 07:05:25 EDT 2022