batgrbproduct analysis for trigger=1161127

batgrbproduct Analysis for Trigger=1161127

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 Jun 14 15:09:44 EDT 2023
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1161127
======================================================================

  Trigger: 01161127      Segment: 000

  BAT Trigger Time: 701212268.864   [s; MET]
      Trigger Stop: 701212269.888   [s; MET]
               UTC: 2023-03-22T21:10:37.893100    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 16.5654750906929   Dec: -47.7287211073544  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9
     Image Trigger?:     NO
     Rate S/N Ratio:     11.6189500386223  [ if not an image trigger ]
     Image S/N Ratio:    9

  Flight Position:   [ source = BAT ]
    RA: 16.5654750906929   Dec: -47.7287211073544  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 16.5534535346927   Dec: -47.7114460390152  [deg; J2000]  
        { 01h 06m 12.8s , -47d 42' 41.2" }
         +/- 1.70920067666722 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.592656105743296 [arcmin] (formal 1-sigma fit error)
    SNR: 14.1434992348981
 
  Angular difference between Flight and Ground position is 1.144470 arcmin
 
  Partial Coding Fraction: 0.921875    [ including projection effects ]

  Duration
     T90: 11.7999999523163 +/- 2.29129222285299
        Measured from: -2.25199997425079
                   to: 9.54799997806549     [s; relative to TRIGTIME]
     T50: 5.23599994182587 +/- 1.7227792020921
        Measured from: -0.851999998092651
                   to: 4.38399994373322     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.0199999809265137     
                   to: 1.01999998092651     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -3.07199990749359     
                   to: 11.3200000524521     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.309115   0.275266   0.136267   0.034166
           0.030832   0.031452   0.026602   0.023834 [error]
 Peak      0.052799   0.051388   0.019281   0.003892
           0.008651   0.008876   0.007411   0.006022 [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 9.18e-08 1.17e-07 1.09e-07 1.78e-07 3.78e-07 4.96e-07   erg/cm2
              Error 1.60e-08 1.47e-08 2.63e-08 8.57e-08 5.84e-08 1.15e-07   erg/cm2
Peak flux Power-law 5.09e-01 3.51e-01 1.59e-01 1.00e-01 1.07e+00 1.12e+00   ph/cm2/s
              Error 1.30e-01 7.01e-02 5.50e-02 6.38e-02 2.08e-01 2.21e-01   ph/cm2/s
 
Fluence   Cutoff-PL 8.92e-08 9.76e-08 1.06e-07 1.16e-07 3.83e-07 4.95e-07   erg/cm2
              Error 1.75e-08 3.73e-08 2.29e-08 1.08e-07 6.30e-08 2.29e-07   erg/cm2
Peak flux Cutoff-PL 4.43e-01 4.24e-01 1.50e-01 1.58e-02 1.03e+00 1.03e+00   ph/cm2/s
              Error 1.53e-01 1.01e-01 6.71e-02 4.84e-02 2.09e-01 2.11e-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    2.103    0.262    -      -           2.83e-03 4.85e-04   49.320 57
CPL   2.222    0.269      94.7    0.0      2.35e-03 0.00e+00   48.760 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.144    0.364    -      -           6.64e-03 1.77e-03   73.460 57
CPL   0.458    1.898      36.8   24.4      6.59e-02 6.92e-01   70.380 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   14.392   -3.072   11.320
T90    11.800   -2.252    9.548
T50     5.236   -0.852    4.384
Peak    1.000    0.020    1.020

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
   16.5535   -47.7114   0.0136    25.1025   -17.1819         0.8424297     14.143 TRIG_01161127                 
 
Foreground time interval of the image:
 -3.072  11.320 (delta_t =  14.392 [sec])
Background time interval of the image:
-239.864  -3.072 (delta_t = 236.792 [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   -3.072 sec. to   11.320 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.10335     ( -0.251012   0.272778 )
Norm@50keV  : 2.82832E-03    ( -0.000495423   0.000475503 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   49.32     using 59 bins.
 Reduced chi-squared = 0.865263
# Null hypothesis probability of 7.55e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 14.39 sec: 0.445744 ( -0.054118  0.054129 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.7833e-07 ( -5.75256e-08  5.92429e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -3.072 sec. to   11.320 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.22170     ( -0.512639   0.0260408 )
Epeak [keV] : 94.7499      (   )
Norm@50keV  : 2.35289E-03    (     )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   48.76     using 59 bins.
 Reduced chi-squared = 0.870714
# Null hypothesis probability of 7.43e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 14.39 sec: 0.392704 ( -0.11046  0.097471 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.8295e-07 ( -6.19454e-08  6.39818e-08 ) ergs/cm2

Band function

Time interval is from   -3.072 sec. to   11.320 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]    : 8.44933  (-1.28353  1.54658)
R^2/D10^2   : 0.377296  (-0.181944   0.349717)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   71.98     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 8.74e-02 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.277e-08   1.531e-08
25- 50  1.397e-07   2.748e-08
50-150  4.378e-08   1.651e-08
15-150  2.563e-07   4.605e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 58.0613       (-19.6805      37.1719)
Norm        : 2.33061       (-0.489128     0.655323)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   53.37     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 6.12e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.382e-08   1.276e-08
25- 50  1.263e-07   1.883e-08
50-150  1.398e-07   5.057e-08
15-150  3.499e-07   6.404e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.81375        (-1.66628      1.59072)
R1^2/D10^2  : 1.39657        (-0.842044      1.65839)
kT2 [keV]   : 29.0863        (-12.4984      52.0038)
R2^2/D10^2  : 2.69270E-03    (-0.0024913   0.0177987)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   50.54     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 6.46e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.136e-08   3.870e-08
25- 50  1.120e-07   3.949e-08
50-150  1.988e-07   1.149e-07
15-150  4.021e-07   1.703e-07

Peak spectrum fit

Power-law model

Time interval is from    0.020 sec. to    1.020 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.14401     ( -0.339978   0.388553 )
Norm@50keV  : 6.63864E-03    ( -0.00179891   0.00174122 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   73.46     using 59 bins.
 Reduced chi-squared = 1.28877
# Null hypothesis probability of 7.01e-02 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 1.06780 ( -0.208043  0.20804 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.19812e-08 ( -1.45461e-08  1.51464e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.020 sec. to    1.020 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.457600     ( -2.24824   1.54763 )
Epeak [keV] : 36.7594      ( -32.4586 16.3248 )
Norm@50keV  : 6.58539E-02    ( -0.0658794   1.31726 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   70.38     using 59 bins.
 Reduced chi-squared = 1.25679
# Null hypothesis probability of 9.36e-02 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 1.03042 ( -0.208087  0.20947 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.57905e-08 ( -1.30066e-08  1.52474e-08 ) ergs/cm2

Band function

Time interval is from    0.020 sec. to    1.020 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]    : 9.88548  (-1.85853  2.12843)
R^2/D10^2   : 0.544995  (-0.290709   0.661963)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   72.58     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 8.00e-02 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.080e-08   3.722e-09
25- 50  2.642e-08   1.000e-08
50-150  1.334e-08   6.722e-09
15-150  5.056e-08   1.644e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 50.9835       (-19.2916      40.1648)
Norm        : 6.11119       (-1.67773     2.44436)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   71.05     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 9.99e-02 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.501e-08   3.903e-09
25- 50  2.170e-08   6.375e-09
50-150  2.146e-08   1.168e-08
15-150  5.817e-08   1.762e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 0.230837        (-0.351128      1.84256)
R1^2/D10^2  : 5.81763E+22        (-6.62217e+22      -6.62359e+22)
kT2 [keV]   : 10.3486        (-1.8978      2.22987)
R2^2/D10^2  : 0.444633    (-0.237614   0.520137)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   67.91     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 1.13e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.426e-08   7.200e-09
25- 50  2.305e-08   1.278e-08
50-150  1.794e-08   1.187e-08
15-150  5.525e-08   2.947e-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: 2.10335     ( -0.251012   0.272778 )
Norm@50keV  : 2.82832E-03    ( -0.000495423   0.000475503 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   49.32     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 7.55e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 14.39 sec: 0.445705 ( -0.0541127  0.0541241 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.78258e-07 ( -5.75157e-08  5.92441e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.49882     ( -0.749111   0.238376 )
Epeak [keV] : 180.594      (   )
Norm@50keV  : 1.78319E-03    (     )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   48.11     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 7.64e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 14.39 sec: 0.445796 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.77468e-07 ( -5.68707e-08  5.9989e-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)  = 1.17e-07
S(50-100 keV) = 1.09e-07

T90 vs. Hardness ratio plot

T90                                   = 11.7999999523163 sec.
Hardness ratio (energy fluence ratio) = 0.931624

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 0.890497
Count Ratio (50-100 keV) / (15-25 keV) = 0.440829

Mask shadow pattern

IMX = 4.475793670390039E-01, IMY = 1.383939603464624E-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:
-239.864000 -3.072000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
285.0974 -24.8729    6.0  48.5  146.1   4.4416   1.9    4.4	HT1900.1-2455                 
297.5562 -65.3667    2.2  31.6   84.6   3.3533   5.3 ------	UNKNOWN                       
352.8010  -5.6289    3.4  40.0 -109.0   3.9520   3.4  547.8	UNKNOWN

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

Time interval of the image:
-3.072000 11.320000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
284.9192 -25.0299    3.7  48.5  145.8   0.7853   3.1    9.1	HT1900.1-2455                 
 16.5535 -47.7115    0.8  25.1  -17.2   0.8425  14.2 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
96.036590 962.270700
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 61.5099 -71.7626    2.6  31.6   84.6   9.2889   4.4 ------	UNKNOWN                       
 54.7385  -5.6128    3.6  53.2  -20.3  10.0316   3.2 ------	UNKNOWN

Plot creation:
Fri Jun 16 09:12:25 EDT 2023