batgrbproduct analysis for trigger=995004

batgrbproduct Analysis for Trigger=995004

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 Oct 19 23:47:22 EDT 2022
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger995004
======================================================================

  Trigger: 00995004      Segment: 000

  BAT Trigger Time: 621197496.768   [s; MET]
      Trigger Stop: 621197497.024   [s; MET]
               UTC: 2020-09-07T18:51:11.173040    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 89.0132987196125   Dec: 6.9106310534709  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9.45
     Image Trigger?:     NO
     Rate S/N Ratio:     23.4093998214393  [ if not an image trigger ]
     Image S/N Ratio:    9.45

  Flight Position:   [ source = BAT ]
    RA: 89.0132987196125   Dec: 6.9106310534709  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 89.0186661880718   Dec: 6.90493001644181  [deg; J2000]  
        { 05h 56m 04.5s , +06d 54' 17.7" }
         +/- 1.83306134109208 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.859541821129795 [arcmin] (formal 1-sigma fit error)
    SNR: 12.7982691588517
 
  Angular difference between Flight and Ground position is 0.468211 arcmin
 
  Partial Coding Fraction: 0.7890625    [ including projection effects ]

  Duration
     T90: 0.832000017166138 +/- 0.133880554639642
        Measured from: -0.572000026702881
                   to: 0.259999990463257     [s; relative to TRIGTIME]
     T50: 0.447999954223633 +/- 0.123693125978031
        Measured from: -0.324000000953674
                   to: 0.123999953269958     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.675999999046326     
                   to: 0.324000000953674     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.639999985694885     
                   to: 0.284000039100647     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.035949   0.051848   0.073322   0.046492
           0.007723   0.008401   0.008137   0.007118 [error]
 Peak      0.034700   0.053882   0.076359   0.046571
           0.007986   0.008730   0.008343   0.007366 [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 7.60e-09 2.32e-08 5.79e-08 4.08e-07 1.57e-07 4.97e-07   erg/cm2
              Error 2.47e-09 4.39e-09 7.34e-09 1.36e-07 2.06e-08 1.37e-07   erg/cm2
Peak flux Power-law 2.34e-01 3.96e-01 5.10e-01 1.32e+00 1.50e+00 2.46e+00   ph/cm2/s
              Error 7.86e-02 7.99e-02 6.33e-02 3.92e-01 2.00e-01 3.79e-01   ph/cm2/s
 
Fluence   Cutoff-PL 7.59e-09 2.32e-08 5.79e-08 4.13e-07 1.57e-07 4.82e-07   erg/cm2
              Error -------- 4.40e-09 -------- 1.79e-07 -------- 1.66e-07   erg/cm2
Peak flux Cutoff-PL 2.34e-01 3.99e-01 5.09e-01 1.42e+00 1.51e+00 2.52e+00   ph/cm2/s
              Error -------- -------- -------- 5.58e-01 -------- 5.50e-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    0.680    0.254    -      -           1.38e-02 1.96e-03   40.310 57
CPL   0.680    0.257    9999.4    0.0      1.39e-02 4.61e-03   40.350 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.637    0.253    -      -           1.29e-02 1.88e-03   43.970 57
CPL   0.627    0.498    9999.4    0.0      1.30e-02 5.68e-03   43.990 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: 0.768000 sec.
T50 in the 50-300 keV band: 0.384000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100    0.924   -0.640    0.284
T90     0.832   -0.572    0.260
T50     0.448   -0.324    0.124
Peak    1.000   -0.676    0.324

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
   89.0187     6.9049   0.0150    23.5826   149.2167         0.2066859     12.798 TRIG_00995004                 
 
Foreground time interval of the image:
 -0.640   0.284 (delta_t =   0.924 [sec])
Background time interval of the image:
-239.768  -0.640 (delta_t = 239.128 [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 0.256000

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 0.256000

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 0.256000

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   -0.640 sec. to    0.284 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.679718     ( -0.263759   0.244503 )
Norm@50keV  : 1.38031E-02    ( -0.00199794   0.001923 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   40.31     using 59 bins.
 Reduced chi-squared = 0.707193
# Null hypothesis probability of 9.54e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 0.924 sec: 1.59818 ( -0.21042  0.21135 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.57142e-07 ( -2.05415e-08  2.05722e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.640 sec. to    0.284 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.680110     ( -0.274924   0.238497 )
Epeak [keV] : 9999.36      ( -9999.36 -9999.36 )
Norm@50keV  : 1.39431E-02    ( -0.00185433   0.00736631 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   40.35     using 59 bins.
 Reduced chi-squared = 0.720536
# Null hypothesis probability of 9.43e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 0.924 sec: 1.59768 ( -0.21049  0.21121 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.57066e-07 ( 0  0 ) ergs/cm2

Band function

Time interval is from   -0.640 sec. to    0.284 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]    : 33.1291  (-6.52571  9.80307)
R^2/D10^2   : 1.83569E-02  (-0.00904533   0.0156132)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   53.24     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 6.17e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.734e-09   7.734e-10
25- 50  1.753e-08   4.366e-09
50-150  1.299e-07   3.038e-08
15-150  1.501e-07   3.799e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-23.7992      -200)
Norm        : 6.36239       (-0.875719     0.875719)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   76.48     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 4.35e-02 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.463e-08   8.395e-09
25- 50  2.815e-08   1.580e-08
50-150  6.173e-08   3.450e-08
15-150  1.045e-07   5.844e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.95984        (-2.9875      5.13494)
R1^2/D10^2  : 1.12503        (-0.943715      9.23637)
kT2 [keV]   : 48.7135        (-14.782      91.4861)
R2^2/D10^2  : 6.25338E-03    (-0.00535116   0.0100051)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   39.08     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 9.48e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.568e-09   5.555e-09
25- 50  2.186e-08   1.087e-08
50-150  1.324e-07   7.074e-08
15-150  1.639e-07   7.836e-08

Peak spectrum fit

Power-law model

Time interval is from   -0.676 sec. to    0.324 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.636501     ( -0.263498   0.243258 )
Norm@50keV  : 1.29407E-02    ( -0.0019213   0.00184716 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   43.97     using 59 bins.
 Reduced chi-squared = 0.771404
# Null hypothesis probability of 8.97e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 1.50460 ( -0.19948  0.2006 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.6266e-07 ( -2.11165e-08  2.11546e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.676 sec. to    0.324 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.627300     ( -0.66186   0.333849 )
Epeak [keV] : 9999.35      ( -9999.36 -9999.36 )
Norm@50keV  : 1.30420E-02    ( -0.00177689   0.00958245 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   43.99     using 59 bins.
 Reduced chi-squared = 0.785536
# Null hypothesis probability of 8.78e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 1.51491 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.62619e-07 ( -2.11146e-08  2.11575e-08 ) ergs/cm2

Band function

Time interval is from   -0.676 sec. to    0.324 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]    : 33.4580  (-6.42223  9.59914)
R^2/D10^2   : 1.70937E-02  (-0.00826421   0.0139609)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   54.02     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 5.88e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.793e-09   8.410e-10
25- 50  1.797e-08   4.670e-09
50-150  1.351e-07   2.918e-08
15-150  1.558e-07   3.495e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-22.8378      -200)
Norm        : 5.96926       (-0.835302     0.835302)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   83.85     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 1.18e-02 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.487e-08   8.420e-09
25- 50  2.860e-08   1.601e-08
50-150  6.272e-08   3.476e-08
15-150  1.062e-07   5.925e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.93013        (-3.12336      5.99702)
R1^2/D10^2  : 0.957319        (-0.838719      9.42294)
kT2 [keV]   : 45.8954        (-12.9379      71.5354)
R2^2/D10^2  : 6.97030E-03    (-0.00543743   0.0100375)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   43.13     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 8.77e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.020e-09   5.047e-09
25- 50  2.194e-08   1.099e-08
50-150  1.373e-07   7.202e-08
15-150  1.682e-07   7.591e-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: 0.679718     ( -0.263759   0.244503 )
Norm@50keV  : 1.38031E-02    ( -0.00199794   0.001923 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   40.31     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 9.54e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 0.924 sec: 1.59821 ( -0.210428  0.211346 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.5712e-07 ( -2.04981e-08  2.05953e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.668849     ( -0.264363   0.249469 )
Epeak [keV] : 9999.36      ( -9999.36 -9999.36 )
Norm@50keV  : 1.38480E-02    ( -0.00181598   0.00741227 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   40.35     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 9.43e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 0.924 sec: 1.60332 ( -0.21661  0.20608 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.57147e-07 ( -2.02541e-08  2.01164e-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)  = 2.32e-08
S(50-100 keV) = 5.79e-08

T90 vs. Hardness ratio plot

T90                                   = 0.832000017166138 sec.
Hardness ratio (energy fluence ratio) = 2.49569

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.44227
Count Ratio (50-100 keV) / (15-25 keV) = 2.03961

Mask shadow pattern

IMX = -3.750242461204163E-01, IMY = -2.234109063977873E-01

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.256000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.256000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.256000

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:
-239.768000 -0.640000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6246  22.0214    0.5  38.1  162.5  10.0430  22.6    0.6	Crab                          
135.5163 -40.5616    0.9  40.9  -14.9   5.1852  13.1    0.7	Vela X-1                      
133.7143 -31.6969    3.3  34.0  -24.5   1.1604   3.5 ------	UNKNOWN                       
135.1554  -1.6035    3.0  29.0  -83.4   1.6617   3.8 ------	UNKNOWN                       
145.1719 -25.0569    2.4  40.0  -42.0   2.1697   4.9 ------	UNKNOWN                       
150.4771 -33.9376    2.4  47.4  -32.2   2.7769   4.7 ------	UNKNOWN                       
141.4932 -12.4832    3.0  34.2  -61.5   1.6880   3.9 ------	UNKNOWN

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

Time interval of the image:
-0.640000 0.284000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.4922  22.0262    6.3  38.2  162.3   0.0395   1.8    7.9	Crab                          
135.4960 -40.6077    5.4  40.9  -14.8   0.0427   2.2    3.5	Vela X-1                      
 89.0187   6.9049    0.9  23.6  149.2   0.2067  12.8 ------	UNKNOWN                       
122.4411 -58.5859    1.9  51.4    8.6   0.2353   6.1 ------	UNKNOWN                       
 88.3929  46.2912    2.4  57.3 -176.3   0.3889   4.8 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
63.732600 837.132600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6281  22.0187    0.3  16.0  166.0  30.8433  44.0    0.4	Crab

Plot creation:
Thu Oct 20 00:50:43 EDT 2022