GRB201105A: Summary Image Light curves Spectra Distribution Others

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: Sat Jul 30 00:53:44 EDT 2022
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1004239
======================================================================

  Trigger: 01004239      Segment: 000

  BAT Trigger Time: 626247096.32   [s; MET]
      Trigger Stop: 626247097.344   [s; MET]
               UTC: 2020-11-05T05:31:10.392500    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 245.626275813377   Dec: 12.7301449302437  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    24.04
     Image Trigger?:     NO
     Rate S/N Ratio:     222.506179689464  [ if not an image trigger ]
     Image S/N Ratio:    24.04

  Analysis Position:   [ source = BAT ]
    RA: 245.626275813377   Dec: 12.7301449302437  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 245.610883088777   Dec: 12.734105095692  [deg; J2000]  
        { 16h 22m 26.6s , +12d 44' 02.8" }
         +/- 0.614656821841044 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.147062150395927 [arcmin] (formal 1-sigma fit error)
    SNR: 60.9637476970861
 
  Angular difference between the analysis and refined position is 0.931663 arcmin
 
  Partial Coding Fraction: 0.609375    [ including projection effects ]

  Duration
     T90: 33.6799999475479 +/- 4.02717970554488
        Measured from: -0.820000052452087
                   to: 32.8599998950958     [s; relative to TRIGTIME]
     T50: 8.67999994754791 +/- 0.348390612572339
        Measured from: 1.29199993610382
                   to: 9.97199988365173     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.763999938964844     
                   to: 1.76399993896484     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -2.85199999809265     
                   to: 72.107999920845     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     3.203238   5.706714   5.917301   1.893654
           0.073136   0.081597   0.079320   0.068540 [error]
 Peak      0.319772   0.561488   0.706670   0.238566
           0.013278   0.017109   0.019192   0.014970 [error]

     [ fluence units of on-axis counts / fully illuminated detector ] 

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100   74.960   -2.852   72.108
T90    33.680   -0.820   32.860
T50     8.680    1.292    9.972
Peak    1.000    0.764    1.764
 
 
====== Spectral Analysis Summary =====================================
 
Model      : spectral model: simple power-law (PL) and cutoff power-law (CPL)
Ph_index   : photon index: E^{Ph_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 both the PL model and CPL model
Nomr_90err : 90% error of the normalization
chi2       : Chi-Squared
dof        : degree of freedo
 
=== Time-averaged spectral analysis ===
(Best model with acceptable fit: N/A)
 
Model Ph_index Ph_90err_low Ph_90err_hi  Epeak  Epeak_90err_low  Epeak_90err_hi  Norm       Nomr_90err_low    Norm_90err_hi    chi2    dof
PL      -1.084    -0.035      0.035       -           -               -         1.52e-02     -2.89e-04          2.89e-04      40.700   57
CPL     -0.900    -0.138      0.144      368.741    -133.605       864.399      1.81e-02     -2.10e-03          2.56e-03      35.660   56
 
 
=== 1-s peak spectral analysis ===
(Best model with acceptable fit: N/A)
 
Model Ph_index Ph_90err_low Ph_90err_hi  Epeak  Epeak_90err_low  Epeak_90err_hi  Norm       Nomr_90err_low    Norm_90err_hi    chi2    dof
PL      -0.906     -0.058     0.058       -           -               -         1.21e-01     -3.92e-03          3.91e-03      54.330   57
CPL     -0.627     -0.232     0.247      295.716    -109.974      1018.244      1.59e-01     -3.08e-02          4.18e-02      50.170   56
 
 
=== 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         PL   9.89e-07  2.35e-06  4.43e-06  2.03e-05  1.20e-05  2.80e-05   erg/cm2
      90%_error_low -4.12e-08 -5.75e-08 -8.69e-08 -9.51e-07 -2.27e-07 -9.78e-07   erg/cm2
      90%_error_hi   4.20e-08  5.73e-08  8.67e-08  9.85e-07  2.27e-07  1.01e-06   erg/cm2
Peak flux       PL   2.82e+00  4.05e+00  4.32e+00  8.56e+00  1.39e+01  1.98e+01   ph/cm2/s
      90%_error_low -1.91e-01 -1.66e-01 -1.51e-01 -6.50e-01 -4.50e-01 -7.38e-01   ph/cm2/s
      90%_error_hi   1.96e-01  1.66e-01  1.51e-01  6.84e-01  4.51e-01  7.50e-01   ph/cm2/s
 
Fluence        CPL   9.34e-07  2.36e-06  4.52e-06  1.63e-05  1.19e-05  2.41e-05   erg/cm2
      90%_error_low -5.66e-08 -5.89e-08 -1.09e-07 -2.43e-06 -2.39e-07 -2.41e-06   erg/cm2
      90%_error_hi   5.79e-08  5.90e-08  1.10e-07  2.82e-06  2.38e-07  2.88e-06   erg/cm2
Peak flux      CPL   2.60e+00  4.09e+00  4.47e+00  6.55e+00  1.37e+01  1.77e+01   ph/cm2/s
      90%_error_low -2.56e-01 -1.73e-01 -1.96e-01 -1.28e+00 -4.69e-01 -1.37e+00   ph/cm2/s
      90%_error_hi   2.63e-01  1.74e-01  1.98e-01  1.66e+00  4.69e-01  1.72e+00   ph/cm2/s
 
======================================================================

Image

Pre-slew 15.0-350.0 keV image (Event data)

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  245.6109    12.7341   0.0031    23.1513  -102.0465        16.6180069     60.964 TRIG_01004239                 
 
Foreground time interval of the image:
 -2.852  72.108 (delta_t =  74.960 [sec])
Background time interval of the image:
-239.320  -2.852 (delta_t = 236.468 [sec])

Light Curves

Note: The mask-weighted lightcurves have units of either count/det or counts/sec/det, where a det is 0.4 x 0.4 = 0.16 sq cm.

Full-time range; 1 s binning

Other quick-look light curves:

• 64 ms binning (zoomed)
• 16 ms binning (zoomed)
• 8 ms binning (zoomed)
• 2 ms binning (zoomed)
• SN=5 or 10 s binning (full-time range)
• Raw light curve

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   -2.852 sec. to   72.108 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.08366     ( -0.0346596   0.0348096 )
Norm@50keV  : 1.52385E-02    ( -0.000289117   0.000288631 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   40.70     using 59 bins.
 Reduced chi-squared = 0.714035
# Null hypothesis probability of 9.49e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 74.96 sec: 1.76487 ( -0.03547  0.03554 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.20072e-05 ( -2.27052e-07  2.27145e-07 ) ergs/cm2
 

Cutoff power-law model

Time interval is from   -2.852 sec. to   72.108 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.899877     ( -0.138074   0.144482 )
Epeak [keV] : 368.741      ( -133.605 864.398 )
Norm@50keV  : 1.81106E-02    ( -0.00210495   0.00256062 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   35.66     using 59 bins.
 Reduced chi-squared = 0.636786
# Null hypothesis probability of 9.84e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 74.96 sec: 1.74341 ( -0.03864  0.03878 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.19149e-05 ( -2.38745e-07  2.38278e-07 ) ergs/cm2
 

1-s peak spectrum fit

Power-law model

Time interval is from    0.764 sec. to    1.764 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.906476     ( -0.0577894   0.058032 )
Norm@50keV  : 0.120703    ( -0.00391615   0.00390916 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   54.33     using 59 bins.
 Reduced chi-squared = 0.953158
# Null hypothesis probability of 5.76e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 13.8548 ( -0.4505  0.4508 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.35136e-06 ( -4.84033e-08  4.85174e-08 ) ergs/cm2
 

Cutoff power-law model

Time interval is from    0.764 sec. to    1.764 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.627483     ( -0.231619   0.246698 )
Epeak [keV] : 295.716      ( -109.974 1018.25 )
Norm@50keV  : 0.158563    ( -0.0308289   0.0417627 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   50.17     using 59 bins.
 Reduced chi-squared = 0.895893
# Null hypothesis probability of 6.94e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 13.6946 ( -0.4689  0.4692 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.33706e-06 ( -5.06186e-08  5.04624e-08 ) ergs/cm2
 

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = N/A sec.
Hardness ratio (energy fluence ratio) = N/A

S(15-50 keV) vs. S(50-150 keV) plot

S(15-50 keV)  = N/A
S(50-150 keV) = N/A

The dash-dotted line and the dashed line traces the fluences calculated from the Band function with Epeak = 15 and 150 keV, respectively. Both lines assume a canonical values of alpha = -1 and beta = -2.5.

Mask shadow pattern

IMX = -8.924167356901987E-02, IMY = 4.181789610806486E-01

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:
-239.320000 -2.852000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.2017  35.3052    0.0   1.0   31.9  -0.3157  -1.5   12.7	Her X-1                       
268.4860  -1.5350    6.4  38.2 -147.8  -0.7101  -1.8    8.6	SW J1753.5-0127               
274.0606 -14.1716    3.5  51.9 -149.2   2.3044   3.2    8.7	GX 17+2                       
288.7495  10.8398    3.5  38.9  173.8   1.1989   3.3    7.0	GRS 1915+105                  
299.7119  35.3242  421.0  36.6  130.2   0.0132   0.0    9.5	Cyg X-1                       
190.7714  74.7238    3.5  50.2   37.0   3.6220   3.3 ------	UNKNOWN                       
205.9054  67.5932    2.5  43.2   30.1   2.0184   4.7 ------	UNKNOWN                       
212.5707  48.9587    3.7  34.1    3.2   0.9327   3.1 ------	UNKNOWN                       
190.9738  40.6369    2.7  49.8   -8.0   2.1294   4.4 ------	UNKNOWN                       
269.0613  -9.4801    2.7  45.9 -145.0   2.3237   4.3 ------	UNKNOWN                       
248.5651  -9.1463    2.5  43.9 -116.4   4.9443   4.6 ------	UNKNOWN                       

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

Time interval of the image:
-2.852000 72.108000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.5028  35.1336    0.0   0.8   43.6  -0.3172  -1.6   12.7	Her X-1                       
268.5215  -1.4996    5.2  38.1 -147.9   0.6882   2.2    9.6	SW J1753.5-0127               
273.9312 -14.1245   13.1  51.8 -149.1   0.6573   0.9    6.8	GX 17+2                       
288.9831  10.9088    0.0  39.1  173.5   0.5927   1.9   11.1	GRS 1915+105                  
299.3838  35.2476    0.0  36.4  130.4   0.3553   1.0   10.5	Cyg X-1                       
181.4756  69.6661    3.2  52.3   30.0   3.4615   3.6 ------	UNKNOWN                       
301.6733  -0.2653    3.1  55.9  172.9   4.1085   3.8 ------	UNKNOWN                       
245.6109  12.7341    0.2  23.2 -102.0  16.6179  61.0 ------	UNKNOWN                       

Post-slew image of 15-350 keV band

Time interval of the image:
728.880590 962.768800
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
299.5898  35.2136    3.0  41.9 -125.2   2.2244   3.8    0.7	Cyg X-1                       
308.0413  41.0535    2.5  33.0 -125.0   1.7230   4.7    6.8	Cyg X-3                       
325.9764  38.2320 1216.0  24.6 -148.8  -0.0022  -0.0   10.7	Cyg X-2                       
 27.9985  32.9899    2.9  31.5   84.7   1.5813   3.9 ------	UNKNOWN                       
357.0481  10.1896    2.5  43.3  143.9   3.0203   4.6 ------	UNKNOWN                       
355.4884  36.3656    2.7  17.1  144.5   1.0456   4.3 ------	UNKNOWN                       
135.5374  78.4415    2.9  46.1  -22.1   1.7286   3.9 ------	UNKNOWN                       
237.7981  72.2336    2.6  46.9  -54.1   4.4180   4.5 ------	UNKNOWN