batgrbproduct analysis for trigger=1110865

batgrbproduct Analysis for Trigger=1110865

Analysis Summary

Notes:

1) No attempt has been made to eliminate the non-significant decimal places.
2) This batgrbproduct analysis is done of the amount of data for this trigger downloaded to date.
3) This batgrbproduct analysis is using the flight position for the mask-weighting calculation.
4) This page will be updated for up to 15 downlinks after the trigger.

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.48
    Process Start Time (local time): Sun Jun 19 21:37:32 EDT 2022
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/prebascript/trigger1110865/GCN5_download_cron
======================================================================

  Trigger: 01110865      Segment: 000

  BAT Trigger Time: 677276792   [s; MET]
      Trigger Stop: 677276856   [s; MET]
               UTC: 2022-06-18T20:26:02.656640    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 103.793142902859   Dec: -1.53069798997938  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.53
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    7.53

  Flight Position:   [ source = BAT ]
    RA: 103.793142902859   Dec: -1.53069798997938  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 103.834860917281   Dec: -1.48976332769513  [deg; J2000]  
        { 06h 55m 20.4s , -01d 29' 23.1" }
         +/- nan [arcmin] (estimated 90% radius based on SNR)
         +/- 1.36189554804756 [arcmin] (formal 1-sigma fit error)
    SNR: -6.89369672947188
 
  Angular difference between Flight and Ground position is 3.506193 arcmin
 
  Partial Coding Fraction: 0.75    [ including projection effects ]

  Duration
     T90: 318.783999919891 +/- 159.043943599311
        Measured from: 197.759999990463
                   to: 516.543999910355     [s; relative to TRIGTIME]
     T50: 182.783999919891 +/- 173.150424022757
        Measured from: 266.240000009537
                   to: 449.023999929428     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 529.771999955177     
                   to: 530.771999955177     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 176.192000031471     
                   to: 554.815999984741     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.075853   0.209567  -0.179937  -0.165756
           0.161002   0.170758   0.146152   0.142328 [error]
 Peak      0.018245   0.038929   0.012097   0.021636
           0.010471   0.012286   0.010057   0.011360 [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 5.17e-08 3.77e-08 1.67e-08 1.24e-08 1.15e-07 1.06e-07   erg/cm2
              Error 5.91e-08 5.38e-08 5.53e-08 6.58e-07 1.74e-07 6.71e-07   erg/cm2
Peak flux Power-law 2.48e-01 2.04e-01 1.14e-01 9.39e-02 6.07e-01 6.60e-01   ph/cm2/s
              Error 1.38e-01 8.90e-02 7.64e-02 1.30e-01 2.64e-01 2.97e-01   ph/cm2/s
 
Fluence   Cutoff-PL 3.66e-08 9.51e-08 2.76e-08 1.82e-10 1.62e-07 1.56e-07   erg/cm2
              Error 5.93e-08 1.13e-07 7.11e-08 1.22e-07 1.75e-07 1.75e-07   erg/cm2
Peak flux Cutoff-PL 1.64e-01 2.99e-01 1.17e-01 4.78e-03 5.84e-01 5.86e-01   ph/cm2/s
              Error 1.66e-01 1.37e-01 9.07e-02 4.71e-02 2.61e-01 2.62e-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    3.045    0.000    -      -           2.46e-05 5.00e-05   46.670 57
CPL  -3.319    0.000      35.6    0.0      1.23e-01 0.00e+00   45.950 56
 
The chi2 of BB fit is  which shows a significant improvement in the fit over a PL.
Check the BB fit.
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.841    0.777    -      -           4.34e-03 2.33e-03   58.020 57
CPL  -0.675    1.074      44.8    0.0      1.13e-01 4.71e+03   55.950 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  378.624  176.192  554.816
T90   318.784  197.760  516.544
T50   182.784  266.240  449.024
Peak    1.000  529.772  530.772

Click here for the BAT GCN circular template

Estimated redshift from machine learning (Ukwatta et al. 2016) - may take a few minutes to calcaulte

Image

Pre-slew 15-350 keV image (Event data; bkg subtracted)

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  103.8349  -1.4898 0.0279   20.0  -79.8      -2.5986    -6.9  TRIG_01110865       
------------------------------------------
 
Foreground time interval of the image:
176.192 507.601 (delta_t = 331.409 [sec])
Background time interval of the image:
-240.000 176.192 (delta_t = 416.192 [sec])

Lightcurves

Notes:

1) All plots contain as much data as has been downloaded to date.
2) The mask-weighted light curves are using the flight position.
3) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
4) 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.
5) 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.
6) 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 64.000000

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 64.000000

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 64.000000

SN=5 or 10 sec. binning (whichever binning is satisfied first)

SN=5 or 10 sec. binning (T < 200 sec)

Spectra

Notes:

1) The fitting includes the systematic errors.
2) For long bursts, a spectral fit of 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.
4) For short bursts (T90<1sec), the specrtum is also fit with Blackbody, OTTB, and Double Blackbody.

Time averaged spectrum fit using the pre-slew DRM

Power-law model

Multiple GTIs in the spectrum
tstart tstop
176.192000 538.590000
540.000000 554.816000
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 3.04468     ( -3.04272   -3.04272 )
Norm@50keV  : 2.45698E-05    ( -2.46166e-05   7.53709e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          46.67 using 59 PHA bins.
# Reduced chi-squared =         0.8187 for     57 degrees of freedom 
# Null hypothesis probability =   8.339639e-01
 
Photon flux (15-150 keV)    in 377.2 sec: 6.98326E-03 ( -0.00698326  0.0096412 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.15481e-07 ( -1.12343e-07  2.36398e-07 ) ergs/cm2

Cutoff power-law model

Multiple GTIs in the spectrum
tstart tstop
176.192000 538.590000
540.000000 554.816000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -3.31855     (     )
Epeak [keV] : 35.5892      (   )
Norm@50keV  : 0.122628    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          45.95 using 59 PHA bins.
# Reduced chi-squared =         0.8205 for     56 degrees of freedom 
# Null hypothesis probability =   8.287389e-01
 
Photon flux (15-150 keV)    in 377.2 sec: 8.50532E-03 8.24278E-03 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.62364e-07 ( -1.62364e-07  1.8742e-07 ) ergs/cm2

Band function

Multiple GTIs in the spectrum
tstart tstop
176.192000 538.590000
540.000000 554.816000
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.88044   ( -4.88044   -4.88044 )
beta        : -9.37167    ( 9.37167   9.37167 )
Epeak [keV] : 39.1663      ( -39.1663 -39.1663 )
Norm@50keV   : 0.593823    ( -0.593823   2.64195e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          45.96 using 59 PHA bins.
# Reduced chi-squared =         0.8356 for     55 degrees of freedom 
# Null hypothesis probability =   8.023285e-01
 
Photon flux (15-150 keV)    in 377.2 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]    : 8.41291  (-8.59669  -8.59669)
R^2/D10^2   : 8.88060E-03  (-0.0088597   -0.0088597)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          45.98 using 59 PHA bins.
# Reduced chi-squared =         0.8067 for     57 degrees of freedom 
# Null hypothesis probability =   8.516905e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.439e-08   3.438e-08
25- 50  8.463e-08   8.042e-08
50-150  2.615e-08   2.976e-08
15-150  1.552e-07   1.343e-07

Thermal bremsstrahlung (OTTB)

XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 22.7551       (-24.5067      -24.5067)
Norm        : 8.27620E-02       (-0.0814227     -0.0814227)
------------------------------------------------------------
 Reduced chi-squared = 
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.359e-08   4.232e-08
25- 50  5.158e-08   4.985e-08
50-150  1.903e-08   3.876e-08
15-150  1.242e-07   1.165e-07

Double BB

XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 2.00278        (-1.96347      -1.96347)
R1^2/D10^2  : 2.90297        (-4.01277      -4.01277)
kT2 [keV]   : 8.88314        (-8.89055      -8.89055)
R2^2/D10^2  : 6.62690E-03    (-0.00661346   -0.00661346)
------------------------------------------------------------
 Reduced chi-squared = 
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.833e-08   3.485e-08
25- 50  7.969e-08   6.395e-08
50-150  2.910e-08   2.654e-08
15-150  1.571e-07   1.135e-07

Peak spectrum fit

Power-law model

Time interval is from  529.772 sec. to  530.772 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.84138     ( -0.681879   0.873077 )
Norm@50keV  : 4.33613E-03    ( -0.00238789   0.0022728 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.02 using 59 PHA bins.
# Reduced chi-squared =          1.018 for     57 degrees of freedom 
# Null hypothesis probability =   4.376371e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.607405 ( -0.263363  0.263873 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.9904e-08 ( -2.03693e-08  2.24551e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from  529.772 sec. to  530.772 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.674750     ( 1.55803   3.70643 )
Epeak [keV] : 44.7566      ( -44.808 -44.808 )
Norm@50keV  : 0.112841    ( -0.413142   9420.13 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.95 using 59 PHA bins.
# Reduced chi-squared =         0.9991 for     56 degrees of freedom 
# Null hypothesis probability =   4.767507e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.583870 ( -0.264197  0.258392 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.52101e-08 ( -1.51616e-08  1.87825e-08 ) ergs/cm2

Band function

Time interval is from  529.772 sec. to  530.772 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 1.56085   ( -3.61508   -1.61505 )
beta        : -9.37167    ( 9.37167   19.3706 )
Epeak [keV] : 44.9823      ( -14.6686 127.203 )
Norm@50keV   : 0.356129    ( -0.444311   111.418 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.65 using 59 PHA bins.
# Reduced chi-squared =          1.012 for     55 degrees of freedom 
# Null hypothesis probability =   4.502772e-01
 
Photon flux (15-150 keV)    in 1 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

Single BB

 XSPEC: quit
 
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 11.5567  (-3.51728  4.73782)
R^2/D10^2   : 0.198511  (-0.198444   0.514777)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
 Reduced chi-squared = 
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.585e-09   3.586e-09
25- 50  1.680e-08   1.071e-08
50-150  1.315e-08   1.000e-08
15-150  3.553e-08   2.259e-08

Thermal bremsstrahlung (OTTB)

XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 75.9471       (-75.6361      -75.6361)
Norm        : 3.00032       (-1.40576     2.42558)
------------------------------------------------------------
 Reduced chi-squared = 
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.756e-09   4.906e-09
25- 50  1.261e-08   8.325e-09
50-150  1.717e-08   1.597e-08
15-150  3.753e-08   2.752e-08

Double BB

XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 0.573316        (-1.23782      14.5242)
R1^2/D10^2  : 4.67227E+09        (-4.93199e+09      -4.93199e+09)
kT2 [keV]   : 11.8771        (-3.59673      5.09411)
R2^2/D10^2  : 0.174682    (-0.13197   0.423513)
------------------------------------------------------------
 Reduced chi-squared = 
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.887e-09   3.489e-09
25- 50  1.605e-08   1.017e-08
50-150  1.372e-08   1.085e-08
15-150  3.566e-08   2.367e-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: 9.54073     ( -9.54073   -9.54073 )
Norm@50keV  : 1.30097E-08    ( -1.30097e-08   8.90227e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.23 using 59 PHA bins.
# Reduced chi-squared =          1.162 for     57 degrees of freedom 
# Null hypothesis probability =   1.884161e-01
 
Photon flux (15-150 keV)    in 331.4 sec: 2.60734E-03 ( -0.00260734  0.0124316 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.3914e-08 ( -2.3914e-08  2.48327e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -9.94515     (     )
Epeak [keV] : 47.0249      (   )
Norm@50keV  : 45.5005    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.25 using 59 PHA bins.
# Reduced chi-squared =          1.165 for     56 degrees of freedom 
# Null hypothesis probability =   1.861329e-01
 
Photon flux (15-150 keV)    in 331.4 sec: 2.55967E-03 ( -0.00255967  0.0138472 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.55409e-19 ( 0  0 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -9.72926   ( 9.72926   9.72926 )
beta        : -9.36690    ( 9.36587   9.36587 )
Epeak [keV] : 13.8989      ( -13.8989 -13.8989 )
Norm@50keV   : 2.20284E-06    ( -2.2085e-06   0.0121102 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.23 using 59 PHA bins.
# Reduced chi-squared =          1.204 for     55 degrees of freedom 
# Null hypothesis probability =   1.427225e-01
 
Photon flux (15-150 keV)    in 331.4 sec: 2.37652E-03 ( 6.99762  -0.00237652 ) 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)  = 3.77e-08
S(50-100 keV) = 1.67e-08

T90 vs. Hardness ratio plot

T90                                   = 318.783999919891 sec.
Hardness ratio (energy fluence ratio) = 0.442971

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 2.7628
Count Ratio (50-100 keV) / (15-25 keV) = -2.37218

Mask shadow pattern

IMX = 6.452443493208748E-02, IMY = 3.582636269565047E-01

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000

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:
-240.000000 176.192000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.5908 -40.5385    3.0  28.8   88.2   4.0982   3.9    3.0	Vela X-1                      
 99.6509 -65.7889    2.8  47.0  133.6  12.2875   4.1 ------	UNKNOWN                       
128.6511   3.2967    2.7  27.8  -17.1   2.7427   4.3 ------	UNKNOWN                       
 80.7242 -22.6162    3.4  29.8 -155.1   2.5309   3.4 ------	UNKNOWN                       
 61.9775 -28.3199    3.1  46.7 -164.4   4.7351   3.7 ------	UNKNOWN                       
 66.1637  -2.9305    2.4  48.2 -129.3  12.3414   4.9 ------	UNKNOWN

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

Time interval of the image:
176.192000 507.600600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.4039 -40.4897    5.0  28.6   88.4   1.2923   2.3    6.9	Vela X-1                      
132.6764 -15.8292    2.2  19.5   28.6   1.8185   5.1 ------	UNKNOWN                       
113.8224 -23.7010    2.1   4.3  110.5   1.7578   5.5 ------	UNKNOWN                       
 74.2881 -38.4183    2.2  38.0  178.4   2.5285   5.2 ------	UNKNOWN                       
114.7945  13.8446    2.1  33.5  -49.6   2.4769   5.4 ------	UNKNOWN                       
109.2668  26.2132    2.8  45.9  -57.6   5.6728   4.1 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
623.500600 644.130000
645.000000 663.030000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
161.5501 -37.7488    4.4  48.1  164.5  15.5439   2.7 ------	UNKNOWN                       
172.0457  47.0356    2.8  37.2  -16.7  10.9954   4.1 ------	UNKNOWN

Plot creation:
Sun Jun 19 21:40:53 EDT 2022