Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.47
    Process Start Time: Mon May 18 14:22:44 EDT 2020
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger965638
======================================================================

  Trigger: 00965638      Segment: 000

  BAT Trigger Time: 608178335.168   [s; MET]
      Trigger Stop: 608178337.216   [s; MET]
               UTC: 2020-04-10T02:25:10.422240    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 299.636573224096   Dec: 51.7634692693049  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.99
     Image Trigger?:     NO
     Rate S/N Ratio:     15.4596248337403  [ if not an image trigger ]
     Image S/N Ratio:    7.99

  Analysis Position:   [ source = BAT ]
    RA: 299.636573224096   Dec: 51.7634692693049  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 299.64412694266   Dec: 51.7420226598478  [deg; J2000]  
        { 19h 58m 34.6s , +51d 44' 31.3" }
         +/- 2.88248635248982 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.59469134746662 [arcmin] (formal 1-sigma fit error)
    SNR: 6.70359871310968
 
  Angular difference between the analysis and refined position is 1.317029 arcmin
 
  Partial Coding Fraction: 0.5390625    [ including projection effects ]

  Duration
     T90: 108.72000002861 +/- 40.7294525960593
        Measured from: -62.7680000066757
                   to: 45.9520000219345     [s; relative to TRIGTIME]
     T50: 36.5599999427795 +/- 22.6323957945066
        Measured from: -12.4959999322891
                   to: 24.0640000104904     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 1.42799997329712     
                   to: 2.42799997329712     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -90.8799999952316     
                   to: 50.6240000724792     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.463353   0.760358   0.497401   0.209579
           0.118214   0.118259   0.100899   0.087509 [error]
 Peak      0.070395   0.072690   0.043259   0.006302
           0.011230   0.011487   0.009699   0.007733 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100  141.504  -90.880   50.624
T90   108.720  -62.768   45.952
T50    36.560  -12.496   24.064
Peak    1.000    1.428    2.428
 
 
====== 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: PL)
 
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      -1.403    -0.301      0.309       -           -               -         9.16e-04     -1.62e-04          1.62e-04      49.780   57
CPL     -1.160    -1.312      1.257      174.747    -174.747      -174.747      1.22e-03     -4.53e-04          3.90e-03      49.620   56
 
 
=== 1-s peak spectral analysis ===
(Best model with acceptable fit: PL)
 
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      -2.163     -0.356     0.315       -           -               -         1.09e-02     -2.56e-03          2.44e-03      56.030   57
CPL     -2.145      0.082     1.780     9999.360      N/A           N/A         1.10e-02        N/A               N/A         56.040   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   1.51e-07  2.95e-07  4.46e-07  1.46e-06  1.25e-06  2.35e-06   erg/cm2
      90%_error_low -4.69e-08 -5.91e-08 -9.56e-08 -5.76e-07 -2.36e-07 -6.61e-07   erg/cm2
      90%_error_hi   5.10e-08  5.78e-08  9.42e-08  7.99e-07  2.38e-07  8.37e-07   erg/cm2
Peak flux       PL   8.49e-01  5.79e-01  2.59e-01  1.60e-01  1.77e+00  1.85e+00   ph/cm2/s
      90%_error_low -1.93e-01 -9.84e-02 -7.78e-02 -7.61e-02 -2.95e-01 -3.10e-01   ph/cm2/s
      90%_error_hi   2.02e-01  9.79e-02  7.97e-02  1.08e-01  2.95e-01  3.10e-01   ph/cm2/s
 
Fluence        CPL   1.45e-07  3.03e-07  4.54e-07  1.00e-06  1.23e-06  1.91e-06   erg/cm2
      90%_error_low -5.28e-08 -6.53e-08 -1.01e-07 -7.82e-07 -2.58e-07 -8.31e-07   erg/cm2
      90%_error_hi   5.39e-08  7.14e-08  1.05e-07  6.37e-07  2.51e-07  1.43e-06   erg/cm2
Peak flux      CPL   8.28e-01  5.99e-01  2.58e-01  1.09e-01  1.75e+00  1.79e+00   ph/cm2/s
      90%_error_low -2.22e-01 -1.05e-01 -8.50e-02 -1.09e-01 -3.03e-01     N/A     ph/cm2/s
      90%_error_hi   1.90e-01  1.35e-01  8.37e-02  1.69e-01  2.96e-01     N/A     ph/cm2/s
 
======================================================================




Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  299.6441    51.7420   0.0288    39.2156  -178.3785         1.8402942      6.704 TRIG_00965638                 
 
Foreground time interval of the image:
-90.880  27.733 (delta_t = 118.613 [sec])
Background time interval of the image:
-239.168 -90.880 (delta_t = 148.288 [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

Bokeh Plot

Other quick-look light curves:




Spectra

Notes:

Time averaged spectrum fit using the average DRM

Power-law model
Time interval is from  -90.880 sec. to   50.624 sec.
XSPEC12>exit
 XSPEC: quit
 
 
Photon index: -1.40317     ( -0.300579   0.309379 )
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.40317     ( -0.309379   0.300579 )
Norm@50keV  : 9.15706E-04    ( -0.000162308   0.000162129 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 141.5 sec: 0.111599 ( -0.0208011  0.020923 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.25134e-06 ( -2.36295e-07  2.3828e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  -90.880 sec. to   50.624 sec.
 XSPEC: quit
 
 
Photon index: -1.15998     ( -1.31201   1.2571 )
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.15998     ( -1.2571   1.31201 )
Epeak [keV] : 174.747      ( -174.718 -174.718 )
Norm@50keV  : 1.21601E-03    ( -0.000452911   0.00389644 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 141.5 sec: 0.110642 ( -0.0211664  0.010839 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.23026e-06 ( -2.58236e-07  2.51223e-07 ) ergs/cm2
 

1-s peak spectrum fit

Power-law model
Time interval is from    1.428 sec. to    2.428 sec.
XSPEC12>exit
 XSPEC: quit
 
 
Photon index: -2.16331     ( -0.356182   0.31486 )
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.16331     ( -0.31486   0.356182 )
Norm@50keV  : 1.08658E-02    ( -0.00256125   0.00244327 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 1 sec: 1.76504 ( -0.29527  0.29535 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.01683e-07 ( -2.03868e-08  2.09733e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    1.428 sec. to    2.428 sec.
 XSPEC: quit
 
 
Photon index: -1.86754     ( -0.182087   1.51609 )
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.86754     ( -1.51609   0.182087 )
Epeak [keV] : 19.3001      (   )
Norm@50keV  : 1.60773E-02    (     )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 1 sec: 1.75043 ( -0.30328  0.29607 ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 

Time-resolved spectra




Distribution

T90 vs. Hardness ratio plot

T90                                   = 108.72 sec.
Hardness ratio (energy fluence ratio) = 1.51237712819

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

S(15-50 keV)  = 4.457237e-07
S(50-150 keV) = 8.056318e-07

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 = -8.157074404106014E-01, IMY = 2.309132682059138E-02

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:
-239.168000 -90.880000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
268.4281  -1.3937    4.6  33.7   69.2   0.9596   2.5    5.0	SW J1753.5-0127               
270.2037 -25.2002    8.9  47.2   38.3  -0.7656  -1.3    8.5	GX 5-1                        
270.2554 -25.6217    4.9  47.5   37.8   1.4887   2.4    7.7	GRS 1758-258                  
274.0131 -13.9472    5.5  36.5   45.7   0.7380   2.1    5.4	GX 17+2                       
276.0724 -30.4570    6.5  48.5   28.4  -1.0228  -1.8    9.3	H1820-303                     
285.0628 -24.9103   18.5  40.0   21.8   0.1904   0.6    1.6	HT1900.1-2455                 
288.6671  10.7902   12.5  10.6   83.1   0.1754   0.9   12.1	GRS 1915+105                  
299.6230  35.1782    1.8  22.7 -178.1   1.2066   6.4    2.1	Cyg X-1                       
308.1268  40.9429    2.8  29.4 -165.1   0.8747   4.2    0.9	Cyg X-3                       
326.0863  38.1955    7.9  35.0 -140.6   0.3925   1.5    8.6	Cyg X-2                       
257.3945  17.4834    2.2  40.8  103.7   3.7814   5.2 ------	UNKNOWN                       
272.7775  64.0892    2.8  54.8  167.5   3.8173   4.2 ------	UNKNOWN                       
275.5969  59.6247    2.4  50.3  166.0   3.0561   4.8 ------	UNKNOWN                       
327.6133  -3.4890    2.6  32.3  -60.7   1.2675   4.5 ------	UNKNOWN                       
345.7323  41.3040    3.0  49.5 -133.0   3.3711   3.9 ------	UNKNOWN                       

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

Time interval of the image:
-90.880000 27.732600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
268.3159  -1.3694    7.5  33.8   69.3  -0.5365  -1.5    5.9	SW J1753.5-0127               
270.1398 -25.0372    8.6  47.2   38.5   0.8071   1.3    8.2	GX 5-1                        
270.2346 -25.6507    5.9  47.6   37.8  -1.2679  -2.0    6.6	GRS 1758-258                  
273.8628 -14.0255    5.6  36.7   45.8  -0.7100  -2.1    8.4	GX 17+2                       
275.7741 -30.2439    9.2  48.4   28.9  -0.7499  -1.3   10.8	H1820-303                     
285.1217 -24.8145    5.0  39.8   21.8  -0.6530  -2.3    7.9	HT1900.1-2455                 
288.7883  10.8803    7.5  10.5   83.4  -0.2813  -1.5    4.0	GRS 1915+105                  
299.4348  35.3485    3.8  22.8 -178.5   0.5788   3.1   11.6	Cyg X-1                       
307.9424  40.9559    5.8  29.4 -165.4  -0.4007  -2.0    7.6	Cyg X-3                       
326.1525  38.2661   18.0  35.1 -140.6  -0.1580  -0.6    3.5	Cyg X-2                       
283.9684  66.1487    2.6  54.6  173.8   3.7597   4.5 ------	UNKNOWN                       
299.6442  51.7420    1.7  39.2 -178.4   1.8407   6.7 ------	UNKNOWN                       
316.5215  59.9848    2.0  49.1 -167.4   2.3246   5.7 ------	UNKNOWN                       
323.5100 -35.1727    2.0  52.9  -23.4   2.9484   5.7 ------	UNKNOWN                       
336.1659  62.1402    2.3  56.1 -159.0   4.4217   5.0 ------	UNKNOWN                       
330.1634   9.2225    3.4  30.4  -85.5   0.9939   3.5 ------	UNKNOWN                       

Post-slew image of 15-350 keV band

Time interval of the image:
85.332620 712.593600
720.832000 839.023800
840.832000 962.887000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.4027  35.4575   14.4  35.8   78.0   1.4208   0.8    7.4	Her X-1                       
288.7556  11.0103   19.0  41.7   13.1  -0.6854  -0.6    4.6	GRS 1915+105                  
299.5737  35.2173    1.1  16.5   -2.9   8.1627  11.0    1.2	Cyg X-1                       
308.1378  40.9515    1.8  12.3  -34.8   4.4289   6.4    1.2	Cyg X-3                       
326.1289  38.3692    4.1  22.8  -67.5   2.5197   2.8    3.5	Cyg X-2                       
244.9833  40.8713    2.7  38.3   92.7   9.0643   4.2 ------	UNKNOWN                       
257.6224  49.2850    2.8  26.4   98.4   4.4828   4.1 ------	UNKNOWN                       
252.5923  54.4480    2.6  27.8  111.3   4.6981   4.5 ------	UNKNOWN                       
302.0842  -1.1827    2.7  53.0   -6.1   6.3846   4.3 ------	UNKNOWN                       
312.8344  48.0301    3.1   9.3  -74.6   2.4724   3.7 ------	UNKNOWN                       
309.5562  27.7462    3.5  25.1  -24.1   2.6027   3.3 ------	UNKNOWN                       
 42.1530  66.3846    3.0  48.3 -151.4   6.7242   3.8 ------	UNKNOWN                       
 31.7126  55.0163    3.3  50.9 -135.4  14.5741   3.5 ------	UNKNOWN