batgrbproduct analysis for trigger=1090472

batgrbproduct Analysis for Trigger=1090472

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): Mon Oct 24 00:05:24 EDT 2022
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1090472
======================================================================

  Trigger: 01090472      Segment: 000

  BAT Trigger Time: 661812549.12   [s; MET]
      Trigger Stop: 661812550.144   [s; MET]
               UTC: 2021-12-21T20:48:40.822240    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 78.9375331088164   Dec: 0.940451696142954  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.09
     Image Trigger?:     NO
     Rate S/N Ratio:     13.8924439894498  [ if not an image trigger ]
     Image S/N Ratio:    7.09

  Flight Position:   [ source = BAT ]
    RA: 78.9375331088164   Dec: 0.940451696142954  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 78.8905711977677   Dec: 0.912781942964853  [deg; J2000]  
        { 05h 15m 33.7s , +00d 54' 46.0" }
         +/- 1.85869471524444 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.62047215020939 [arcmin] (formal 1-sigma fit error)
    SNR: 12.5468709535705
 
  Angular difference between Flight and Ground position is 3.270115 arcmin
 
  Partial Coding Fraction: 0.9765625    [ including projection effects ]

  Duration
     T90: 136.527999997139 +/- 13.8882079356101
        Measured from: -118.44000005722
                   to: 18.0879999399185     [s; relative to TRIGTIME]
     T50: 75.1679999828339 +/- 17.7403274329958
        Measured from: -71.444000005722
                   to: 3.72399997711182     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.235999941825867     
                   to: 1.23599994182587     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -129.340000033379     
                   to: 26.3559999465942     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.585194   1.088090   0.802745   0.274289
           0.080889   0.084281   0.076096   0.074293 [error]
 Peak      0.020461   0.049291   0.039249   0.017263
           0.006747   0.007685   0.006819   0.006302 [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 1.81e-07 3.80e-07 6.27e-07 2.35e-06 1.73e-06 3.53e-06   erg/cm2
              Error 2.88e-08 3.71e-08 7.21e-08 5.87e-07 1.80e-07 6.39e-07   erg/cm2
Peak flux Power-law 2.29e-01 2.84e-01 2.56e-01 4.01e-01 9.07e-01 1.17e+00   ph/cm2/s
              Error 7.22e-02 5.66e-02 5.31e-02 1.71e-01 1.62e-01 2.28e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.57e-07 4.14e-07 6.49e-07 7.24e-07 1.59e-06 1.95e-06   erg/cm2
              Error 3.43e-08 4.84e-08 8.12e-08 -------- 2.02e-07 7.91e-07   erg/cm2
Peak flux Cutoff-PL 1.96e-01 3.13e-01 2.74e-01 1.44e-01 8.76e-01 9.27e-01   ph/cm2/s
              Error 8.18e-02 7.18e-02 6.22e-02 2.37e-01 1.67e-01 2.78e-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    1.276    0.156    -      -           1.12e-03 1.02e-04   51.380 57
CPL   0.438    0.772      91.1  104.9      3.00e-03 3.31e-03   47.060 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.149    0.291    -      -           7.78e-03 1.38e-03   59.810 57
CPL   0.189    1.340      93.0  -29.3      2.42e-02 8.03e-02   57.800 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: 113.408000 sec.
T50 in the 50-300 keV band: 93.568000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  155.696 -129.340   26.356
T90   136.528 -118.440   18.088
T50    75.168  -71.444    3.724
Peak    1.000    0.236    1.236

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
   78.8906     0.9128   0.0153     7.1543    72.9221         2.8357197     12.547 TRIG_01090472                 
 
Foreground time interval of the image:
-129.340  15.181 (delta_t = 144.521 [sec])
Background time interval of the image:
-239.120 -129.340 (delta_t = 109.780 [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 1.024000

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 1.024000

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 1.024000

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 -129.340 sec. to   26.356 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.27647     ( -0.156383   0.155253 )
Norm@50keV  : 1.11758E-03    ( -0.000102293   0.000102133 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   51.38     using 59 bins.
 Reduced chi-squared = 0.901404
# Null hypothesis probability of 6.85e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 155.7 sec: 0.132771 ( -0.012168  0.012179 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.72981e-06 ( -1.7918e-07  1.81532e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from -129.340 sec. to   26.356 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.438363     ( -0.845839   0.697526 )
Epeak [keV] : 91.1456      ( -24.4686 185.423 )
Norm@50keV  : 2.99960E-03    ( -0.00165692   0.00496774 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   47.06     using 59 bins.
 Reduced chi-squared = 0.840357
# Null hypothesis probability of 7.97e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 155.7 sec: 0.127684 ( -0.012992  0.012923 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.59312e-06 ( -1.90281e-07  2.13838e-07 ) ergs/cm2

Band function

Time interval is from -129.340 sec. to   26.356 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]    : 15.8212  (-1.66889  1.94656)
R^2/D10^2   : 1.31794E-02  (-0.00431261   0.00613836)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   58.10     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 4.35e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.065e-07   1.982e-08
25- 50  4.437e-07   5.418e-08
50-150  7.729e-07   1.415e-07
15-150  1.323e-06   1.789e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-31.3711      -200)
Norm        : 0.545172       (-0.0497675     0.0497675)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   56.50     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 4.94e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.113e-07   2.756e-08
25- 50  4.065e-07   1.622e-07
50-150  8.916e-07   4.518e-07
15-150  1.510e-06   6.954e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 11.3628        (-3.82369      2.97261)
R1^2/D10^2  : 3.10162E-02        (-0.0159564      0.0543318)
kT2 [keV]   : 51.1152        (-25.4346      -47.0013)
R2^2/D10^2  : 1.96399E-04    (-0.000173156   0.0034468)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   45.31     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 8.21e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.412e-07   5.601e-08
25- 50  4.465e-07   1.738e-07
50-150  1.064e-06   5.350e-07
15-150  1.652e-06   7.012e-07

Peak spectrum fit

Power-law model

Time interval is from    0.236 sec. to    1.236 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.14920     ( -0.294944   0.286969 )
Norm@50keV  : 7.77692E-03    ( -0.00137978   0.00137884 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   59.81     using 59 bins.
 Reduced chi-squared = 1.0493
# Null hypothesis probability of 3.74e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 0.906869 ( -0.161894  0.162081 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.00848e-08 ( -1.59786e-08  1.62826e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.236 sec. to    1.236 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.188996     ( -1.60467   1.0746 )
Epeak [keV] : 92.9824      ( -34.3026 -92.9952 )
Norm@50keV  : 2.41538E-02    ( -0.0241453   0.136535 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   57.80     using 59 bins.
 Reduced chi-squared = 1.03214
# Null hypothesis probability of 4.09e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 0.876004 ( -0.166702  0.166596 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.33398e-08 ( -1.81537e-08  1.8392e-08 ) ergs/cm2

Band function

Time interval is from    0.236 sec. to    1.236 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]    : 16.6974  (-3.41292  4.75995)
R^2/D10^2   : 7.75591E-02  (-0.0437222   0.0896057)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   60.83     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 3.40e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.425e-09   1.644e-09
25- 50  1.930e-08   6.012e-09
50-150  3.819e-08   1.434e-08
15-150  6.191e-08   1.635e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-62.2402      -200)
Norm        : 3.66784       (-0.664019     0.664019)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   63.52     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 2.58e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.133e-09   5.290e-09
25- 50  1.757e-08   1.016e-08
50-150  3.853e-08   2.168e-08
15-150  6.523e-08   3.775e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 10.0039        (-4.71922      6.12114)
R1^2/D10^2  : 0.267194        (-0.182929      1.07017)
kT2 [keV]   : 34.1424        (-23.3657      -35.2126)
R2^2/D10^2  : 5.21807E-03    (-0.00436578   0.0505272)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   56.46     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 4.20e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.323e-09   3.720e-09
25- 50  1.923e-08   1.155e-08
50-150  5.102e-08   2.693e-08
15-150  7.657e-08   3.900e-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: 1.25314     ( -0.163869   0.162251 )
Norm@50keV  : 1.10348E-03    ( -0.000105872   0.000105745 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   54.46     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 5.71e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 144.5 sec: 0.130579 ( -0.0125827  0.012595 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.59449e-06 ( -1.73302e-07  1.75449e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.358682     ( -0.915014   0.744179 )
Epeak [keV] : 89.7154      ( -24.0132 180.529 )
Norm@50keV  : 3.16583E-03    ( -0.00182409   0.00595395 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   50.14     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 6.95e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 144.5 sec: 0.125294 ( -0.013448  0.013375 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.4603e-06 ( -2.04414e-07  2.08326e-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)  = 3.80e-07
S(50-100 keV) = 6.27e-07

T90 vs. Hardness ratio plot

T90                                   = 136.527999997139 sec.
Hardness ratio (energy fluence ratio) = 1.65

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.85937
Count Ratio (50-100 keV) / (15-25 keV) = 1.37176

Mask shadow pattern

IMX = 3.686134579391920E-02, IMY = -1.199847013855260E-01

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000

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:
-239.120000 -129.340000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6329  22.0285    0.8  28.8   72.0   3.7422  14.9    0.8	Crab                          
 63.7565 -40.4099    3.8  36.4 -103.0   1.1936   3.0 ------	UNKNOWN                       
 20.0287  -2.9450    2.0  57.1  -30.0   5.4847   5.7 ------	UNKNOWN                       
 88.8603 -53.2947    2.4  48.2 -129.7   4.1727   4.9 ------	UNKNOWN

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

Time interval of the image:
-129.340000 15.180590
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.7327  21.9465    5.0  28.7   72.2   0.9021   2.3    6.9	Crab                          
 78.8906   0.9128    0.9   7.2   72.9   2.8357  12.6 ------	UNKNOWN                       
133.5027 -31.2078    2.3  58.2 -177.2   8.0872   5.0 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
42.980590 963.023700
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6339  22.0224    0.3  21.6   77.0  39.7659  33.7    0.5	Crab                          
114.0495   0.5421    2.6  35.1  155.4   6.4208   4.5 ------	UNKNOWN                       
 61.7803   0.6624    6.3  17.1  -25.7   1.5964   1.8 ------	UNKNOWN                       
126.7128 -34.7100    3.2  57.1 -161.4  14.7239   3.6 ------	UNKNOWN                       
123.7202 -40.4233    3.6  58.0 -154.2  16.7233   3.2 ------	UNKNOWN                       
114.3121 -44.5330    5.7  55.3 -145.1  13.0549   2.0 ------	UNKNOWN                       
 94.4920 -45.2549    3.1  48.2 -129.6  17.4754   3.7 ------	UNKNOWN                       
 98.6984 -45.6740    3.2  49.8 -133.0  17.4026   3.6 ------	UNKNOWN

Plot creation:
Mon Oct 24 05:12:59 EDT 2022