GRB160703A: 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 v2.46
    Process Start Time: Fri Jul 22 13:33:55 EDT 2016
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger702699
======================================================================

  Trigger: 00702699      Segment: 000

  BAT Trigger Time: 489240621.632   [s; MET]
      Trigger Stop: 489240622.656   [s; MET]
               UTC: 2016-07-03T12:10:05.126360    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 287.392582646627   Dec: 36.9010907591217  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    12.8
     Image Trigger?:     NO
     Rate S/N Ratio:     49.3254498205541  [ if not an image trigger ]
     Image S/N Ratio:    12.8

  Analysis Position:   [ source = BAT ]
    RA: 287.392582646627   Dec: 36.9010907591217  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 287.413721588951   Dec: 36.9121334888191  [deg; J2000]  
        { 19h 09m 39.3s , +36d 54' 43.7" }
         +/- 0.811119137826953 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.249603914118526 [arcmin] (formal 1-sigma fit error)
    SNR: 41.0201697915523
 
  Angular difference between the analysis and refined position is 1.211427 arcmin
 
  Partial Coding Fraction: 0.84375    [ including projection effects ]

  Duration
     T90: 45.0079999566078 +/- 3.0240237791644
        Measured from: -8.37200003862381
                   to: 36.635999917984     [s; relative to TRIGTIME]
     T50: 20.4159999489784 +/- 0.391795859607358
        Measured from: 6.66799998283386
                   to: 27.0839999318123     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 26.6439999938011     
                   to: 27.6439999938011     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -26.4280000329018     
                   to: 53.3039999604225     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     3.470494   4.866242   4.174813   1.166372
           0.058119   0.062698   0.056546   0.044999 [error]
 Peak      0.193367   0.269787   0.196482   0.046893
           0.008619   0.009664   0.008442   0.005500 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100   79.732  -26.428   53.304
T90    45.008   -8.372   36.636
T50    20.416    6.668   27.084
Peak    1.000   26.644   27.644
 
 
====== 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      -1.328    -0.035      0.035       -           -               -         1.15e-02     -2.08e-04          2.08e-04      39.360   57
CPL     -1.325    -0.034      0.037     9999.360    -9999.360      -9999.360      1.15e-02     -1.92e-04          9.17e-04      39.470   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      -1.495     -0.076     0.075       -           -               -         4.56e-02     -1.93e-03          1.93e-03      69.700   57
CPL     -1.286     -0.241     0.289      181.401     -76.096      -181.401      5.75e-02     -1.29e-02          2.10e-02      68.010   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   9.93e-07  2.03e-06  3.23e-06  1.15e-05  8.97e-06  1.77e-05   erg/cm2
      90%_error_low -4.05e-08 -4.76e-08 -6.42e-08 -5.51e-07 -1.63e-07 -5.68e-07   erg/cm2
      90%_error_hi   4.13e-08  4.76e-08  6.40e-08  5.70e-07  1.63e-07  5.84e-07   erg/cm2
Peak flux       PL   1.87e+00  1.89e+00  1.34e+00  1.51e+00  5.69e+00  6.61e+00   ph/cm2/s
      90%_error_low -1.42e-01 -8.77e-02 -7.02e-02 -1.60e-01 -2.48e-01 -2.77e-01   ph/cm2/s
      90%_error_hi   1.46e-01  8.73e-02  6.99e-02  1.72e-01  2.48e-01  2.78e-01   ph/cm2/s
 
Fluence        CPL   9.92e-07  2.03e-06  3.23e-06  1.14e-05  8.97e-06  1.85e-05   erg/cm2
      90%_error_low    N/A    -4.76e-08    N/A       N/A    -1.63e-07    N/A      erg/cm2
      90%_error_hi     N/A     4.76e-08    N/A       N/A     1.59e-07    N/A      erg/cm2
Peak flux      CPL   1.79e+00  1.92e+00  1.37e+00  1.21e+00  5.63e+00  6.28e+00   ph/cm2/s
      90%_error_low -1.75e-01 -9.58e-02 -7.90e-02 -3.07e-01 -2.61e-01 -4.21e-01   ph/cm2/s
      90%_error_hi   1.79e-01  9.69e-02  8.00e-02  3.18e-01  2.61e-01  4.90e-01   ph/cm2/s
 
======================================================================

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  287.4137    36.9121   0.0047    22.0448   153.9929         5.2410007     41.020 TRIG_00702699                 
 
Foreground time interval of the image:
-26.428  12.069 (delta_t =  38.497 [sec])
Background time interval of the image:
-48.331 -26.428 (delta_t =  21.903 [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  -26.428 sec. to   53.304 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.32776     ( -0.0353028   0.0354689 )
Norm@50keV  : 1.14638E-02    ( -0.000208246   0.000207911 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          39.36 using 59 PHA bins.
# Reduced chi-squared =         0.6905 for     57 degrees of freedom 
# Null hypothesis probability =   9.639220e-01
 
Photon flux (15-150 keV)    in 79.73 sec: 1.37492 ( -0.02863  0.02879 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.97353e-06 ( -1.62601e-07  1.62588e-07 ) ergs/cm2
 

Cutoff power-law model

Time interval is from  -26.428 sec. to   53.304 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.32494     ( -0.0345604   0.0369414 )
Epeak [keV] : 9999.36      ( -9999.36 -9999.36 )
Norm@50keV  : 1.14949E-02    ( -0.000207077   0.000901745 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          39.47 using 59 PHA bins.
# Reduced chi-squared =         0.7048 for     56 degrees of freedom 
# Null hypothesis probability =   9.539607e-01
 
Photon flux (15-150 keV)    in 79.73 sec: 1.38370 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.97146e-06 ( -1.62557e-07  1.58562e-07 ) ergs/cm2
 

1-s peak spectrum fit

Power-law model

Time interval is from   26.644 sec. to   27.644 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.49451     ( -0.0755105   0.0751313 )
Norm@50keV  : 4.56444E-02    ( -0.00193   0.00192615 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          69.70 using 59 PHA bins.
# Reduced chi-squared =          1.223 for     57 degrees of freedom 
# Null hypothesis probability =   1.204613e-01
 
Photon flux (15-150 keV)    in 1 sec: 5.68998 ( -0.2479  0.24829 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.33451e-07 ( -1.98896e-08  1.99683e-08 ) ergs/cm2
 

Cutoff power-law model

Time interval is from   26.644 sec. to   27.644 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.28628     ( -0.240841   0.289415 )
Epeak [keV] : 181.401      ( -76.0966 -181.401 )
Norm@50keV  : 5.74844E-02    ( -0.0128968   0.0209526 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          68.01 using 59 PHA bins.
# Reduced chi-squared =          1.214 for     56 degrees of freedom 
# Null hypothesis probability =   1.304588e-01
 
Photon flux (15-150 keV)    in 1 sec: 5.62625 ( -0.26064  0.26101 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.27829e-07 ( -2.13389e-08  2.12782e-08 ) ergs/cm2
 

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = 45.008 sec.
Hardness ratio (energy fluence ratio) = 1.59360256513

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

S(15-50 keV)  = 3.0217869e-06
S(50-150 keV) = 5.951728e-06

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 = -3.639326488189760E-01, IMY = -1.775578893147506E-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:
-48.331400 -26.428000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.4080  35.2273    3.9  47.0  171.2  -0.3722  -3.0    7.3	Her X-1                       
288.8517  11.0825   16.0  38.7  112.9  -0.1230  -0.7    8.8	GRS 1915+105                  
299.6024  35.1909    0.7  14.1  133.9   0.8220  16.3    0.9	Cyg X-1                       
307.9781  40.9131    9.6   5.6  147.8  -0.0582  -1.2    6.4	Cyg X-3                       
326.2246  38.4156    9.1   9.1   -0.6   0.0590   1.3    6.2	Cyg X-2                       
299.6995   5.7276    2.2  39.0   93.7   1.0592   5.4 ------	UNKNOWN                       
241.0571  43.1961    2.9  52.7 -173.4   0.6047   4.0 ------	UNKNOWN                       
 15.7269  16.0128    2.8  57.5  -13.7   0.8961   4.1 ------	UNKNOWN                       

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

Time interval of the image:
-26.428000 12.068600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.3997  35.2308    6.8  47.0  171.2   0.4649   1.7    7.3	Her X-1                       
288.8048  10.9125    5.3  38.9  112.8   0.8894   2.1    2.0	GRS 1915+105                  
299.5449  35.2191    4.3  14.1  134.1   0.3332   2.7    2.5	Cyg X-1                       
308.0204  40.9622    4.9   5.6  148.2   0.2758   2.4    4.1	Cyg X-3                       
325.9257  38.2801   20.6   9.0    0.8  -0.0649  -0.6   11.8	Cyg X-2                       
287.4137  36.9121    0.3  22.0  154.0   5.2404  41.0 ------	UNKNOWN                       
344.1131  65.2511    2.3  28.1  -86.2   0.8948   5.1 ------	UNKNOWN                       
 23.6144  47.9684    2.8  47.0  -53.2   2.0924   4.1 ------	UNKNOWN                       
 20.1172  61.5058    2.3  42.2  -71.5   2.4530   5.0 ------	UNKNOWN                       
 16.4450  69.3716    2.3  41.0  -83.4   2.3784   5.0 ------	UNKNOWN                       

Post-slew image of 15-350 keV band

Time interval of the image:
55.268600 962.542300
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.2849  35.4423   11.4  26.6 -177.6   0.7131   1.0   10.4	Her X-1                       
288.8141  10.9231    4.3  26.0   82.4   2.3041   2.7    1.6	GRS 1915+105                  
299.5903  35.2038    0.2  10.0    1.7  39.2631  63.1    0.1	Cyg X-1                       
308.1133  40.9565    2.1  16.6  -25.0   3.4296   5.6    0.3	Cyg X-3                       
326.0353  38.4393    7.5  30.4  -19.3   1.0941   1.5    9.5	Cyg X-2                       
284.7226   4.9123    2.7  32.1   90.6   4.8500   4.3 ------	UNKNOWN                       
244.3751  10.8598    3.3  46.6  152.8   6.7163   3.5 ------	UNKNOWN                       
315.4684  15.3960    2.7  32.9   28.9   3.6252   4.3 ------	UNKNOWN                       
291.3022  65.1209    3.2  28.3  -91.0   3.2320   3.6 ------	UNKNOWN                       
253.6314  75.9506    2.7  41.9 -106.1  14.0132   4.4 ------	UNKNOWN