GRB170205A

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: Wed Apr 12 15:21:45 EDT 2017
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger736843
======================================================================

  Trigger: 00736843      Segment: 000

  BAT Trigger Time: 507991168.52   [s; MET]
      Trigger Stop: 507991168.584   [s; MET]
               UTC: 2017-02-05T12:39:09.951640    [includes UTCF correction] 
       Where From?: (*SHORT BURST*) TDRSS scaled map message

  BAT 
    RA: 262.150840978483   Dec: -0.0526188988923711  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.3
     Image Trigger?:     NO
     Rate S/N Ratio:     10.8627804912002  [ if not an image trigger ]
     Image S/N Ratio:    8.3

  Analysis Position:   [ source = BAT ]
    RA: 262.150840978483   Dec: -0.0526188988923711  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 262.157909766478   Dec: -0.0577473101881337  [deg; J2000]  
        { 17h 28m 37.9s , -00d 03' 27.9" }
         +/- 0.893896621379505 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.262825368615402 [arcmin] (formal 1-sigma fit error)
    SNR: 35.7032669757834
 
  Angular difference between the analysis and refined position is 0.523990 arcmin
 
  Partial Coding Fraction: 0.9140625    [ including projection effects ]

  Duration
     T90: 26.1279999613762 +/- 3.1836105299692
        Measured from: -0.11599999666214
                   to: 26.0119999647141     [s; relative to TRIGTIME]
     T50: 17.1159999370575 +/- 0.621868129887804
        Measured from: 3.36800003051758
                   to: 20.4839999675751     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.296000003814697     
                   to: 0.703999996185303     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -1.42399996519089     
                   to: 46.3960000276566     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     2.383321   2.742362   1.492745   0.282991
           0.062412   0.061748   0.054804   0.053748 [error]
 Peak      0.143969   0.210002   0.146369   0.036744
           0.010594   0.011224   0.010283   0.009050 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100   47.820   -1.424   46.396
T90    26.128   -0.116   26.012
T50    17.116    3.368   20.484
Peak    1.000   -0.296    0.704
 
 
====== 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      -1.852    -0.065      0.065       -           -               -         8.60e-03     -2.90e-04          2.89e-04      39.110   57
CPL     -1.633    -0.130      0.270       79.519     -21.125       -79.519      1.11e-02     -2.66e-03          4.09e-03      36.940   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      -1.489     -0.116     0.115       -           -               -         3.45e-02     -2.26e-03          2.24e-03      42.670   57
CPL     -1.279     -0.270     0.480      167.559    -167.559      -167.559      4.42e-02     -1.16e-02          3.29e-02      42.010   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   7.31e-07  1.09e-06  1.20e-06  2.51e-06  3.78e-06  5.53e-06   erg/cm2
      90%_error_low -4.17e-08 -3.53e-08 -5.68e-08 -2.52e-07 -1.28e-07 -2.94e-07   erg/cm2
      90%_error_hi   4.26e-08  3.52e-08  5.70e-08  2.72e-07  1.29e-07  3.09e-07   erg/cm2
Peak flux       PL   1.40e+00  1.42e+00  1.01e+00  1.15e+00  4.29e+00  4.99e+00   ph/cm2/s
      90%_error_low -1.52e-01 -9.48e-02 -8.56e-02 -1.90e-01 -2.72e-01 -3.22e-01   ph/cm2/s
      90%_error_hi   1.57e-01  9.43e-02  8.52e-02  2.13e-01  2.72e-01  3.24e-01   ph/cm2/s
 
Fluence        CPL   7.04e-07  1.10e-06  1.20e-06  1.76e-06  3.69e-06  4.77e-06   erg/cm2
      90%_error_low -5.19e-08 -4.09e-08 -5.86e-08 -5.67e-07 -1.64e-07 -6.00e-07   erg/cm2
      90%_error_hi   5.27e-08  4.14e-08  5.87e-08  8.30e-07  1.64e-07  8.67e-07   erg/cm2
Peak flux      CPL   1.35e+00  1.45e+00  1.03e+00  8.78e-01  4.24e+00  4.71e+00   ph/cm2/s
      90%_error_low -1.83e-01 -1.11e-01 -9.05e-02 -3.70e-01 -2.90e-01 -4.89e-01   ph/cm2/s
      90%_error_hi   1.84e-01  1.13e-01  9.21e-02  3.32e-01  2.89e-01  4.20e-01   ph/cm2/s
 
======================================================================

Special notes of this burst

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  262.1579    -0.0577   0.0054    16.4616   146.7014         2.4665659     35.703 TRIG_00736843                 
 
Foreground time interval of the image:
 -1.424   9.781 (delta_t =  11.205 [sec])
Background time interval of the image:
-60.520  -1.424 (delta_t =  59.096 [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:

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   -1.424 sec. to   46.396 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.85199     ( -0.0650872   0.0646087 )
Norm@50keV  : 8.59925E-03    ( -0.000290248   0.000289047 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          39.11 using 59 PHA bins.
# Reduced chi-squared =         0.6861 for     57 degrees of freedom 
# Null hypothesis probability =   9.662173e-01
 
Photon flux (15-150 keV)    in 47.82 sec: 1.20976 ( -0.04103  0.04118 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.78155e-06 ( -1.28213e-07  1.28837e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from   -1.424 sec. to   46.396 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.63286     ( -0.130203   0.269799 )
Epeak [keV] : 79.5191      ( -21.1259 -79.5196 )
Norm@50keV  : 1.11393E-02    ( -0.00266357   0.00408512 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          36.94 using 59 PHA bins.
# Reduced chi-squared =         0.6596 for     56 degrees of freedom 
# Null hypothesis probability =   9.769307e-01
 
Photon flux (15-150 keV)    in 47.82 sec: 1.18816 ( -0.04758  0.04772 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.69105e-06 ( -1.64015e-07  1.63908e-07 ) ergs/cm2

1-s peak spectrum fit

Power-law model

Time interval is from   -0.296 sec. to    0.704 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.48921     ( -0.115579   0.114568 )
Norm@50keV  : 3.44780E-02    ( -0.00225542   0.00224376 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          42.67 using 59 PHA bins.
# Reduced chi-squared =         0.7486 for     57 degrees of freedom 
# Null hypothesis probability =   9.208522e-01
 
Photon flux (15-150 keV)    in 1 sec: 4.29194 ( -0.27189  0.27211 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.27703e-07 ( -2.38665e-08  2.41085e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.296 sec. to    0.704 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.27946     ( -0.270227   0.479661 )
Epeak [keV] : 167.559      ( -167.56 -167.56 )
Norm@50keV  : 4.42049E-02    ( -0.0115964   0.0329083 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          42.01 using 59 PHA bins.
# Reduced chi-squared =         0.7501 for     56 degrees of freedom 
# Null hypothesis probability =   9.173627e-01
 
Photon flux (15-150 keV)    in 1 sec: 4.24465 ( -0.28955  0.28857 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.21048e-07 ( -2.77764e-08  2.74738e-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.

 IMX = -2.469723229948882E-01,

Spacecraft aspect plot

Bright

Pre-burst

 Time interval of the image: -60.520000 -1.424000

# RAcent #  [deg] 244.9284 -15.6447 254.3691  35.4592 255.9793 -37.8282 256.5290 -36.5898 262.9656 -24.8904 264.9323 -44.4350 268.3999  -1.3527 270.4601 -25.0029 270.1506 -25.8766 274.1491 -14.1401 275.7491 -30.4179 285.2096 -24.7795 288.8478  10.8218 262.8320 -33.7607 242.5253  24.2310 251.0216 -26.2166 239.7399 -57.6651 256.8731 -19.0670 262.1540  -0.0404 259.7815 -25.0270 273.3471 -65.0131 UNKNOWN UNKNOWN UNKNOWN UNKNOWN

Pre-slew

 Time interval of the image: -1.424000 9.780590

# RAcent #  [deg] 244.9471 -15.6279 254.5422  35.2144 255.9902 -37.7735 256.4936 -36.5896 262.8661 -24.6292 264.6667 -44.5345 268.4239  -1.5405 270.4681 -24.9494 270.2934 -25.6906 273.8345 -14.1673 276.0742 -30.5253 284.8823 -24.7730 288.8685  10.9148 262.9322 -33.8277 262.1579  -0.0578 286.0218 -71.6380 302.5252 -28.1650

Post-slew

 Time interval of the image: 49.580600 125.109900 126.480000 686.880590

# RAcent #  [deg] 244.9781 -15.6356 254.4645  35.1949 256.0021 -37.8443 256.5753 -36.4685 263.0303 -24.7493 264.6569 -44.4444 268.3424  -1.6011 270.2427 -25.1357 270.3995 -25.9129 273.9509 -13.9679 275.7824 -30.4883 285.2080 -24.9040 288.8113  10.9432 299.6117  35.2007 263.0663 -33.9238 243.0385  11.5929 237.3578 -35.4286 232.2463 -49.0344 282.0829  51.4094 286.8873  52.9995 238.7242 -49.9278 UNKNOWN UNKNOWN UNKNOWN

Mask shadow pattern

IMY = -1.622217512066765E-01 source in the pre-burst/pre-slew/post-slew images image of 15-350 keV band DECcent POSerr Theta Phi PeakCts SNR AngSep Name [deg] ['] [deg] [deg] ['] 1.5 23.4 77.3 0.5535 7.6 3.0 Sco X-1 7.1 52.4 156.9 -0.5189 -1.7 8.2 Her X-1 1.7 25.6 16.7 0.4474 6.8 1.0 4U 1700-377 131.8 24.3 17.3 0.0056 0.1 11.0 GX 349+2 5.8 11.5 21.5 0.1202 2.0 9.0 GX 1+4 4.5 29.6 -1.8 -0.1773 -2.6 8.2 4U 1735-44 7.0 13.7 169.0 0.1003 1.6 6.3 SW J1753.5-0127 13.7 10.1 -14.7 0.0526 0.8 10.6 GX 5-1 24.1 10.9 -12.7 -0.0288 -0.5 11.5 GRS 1758-258 5.8 4.9 -107.3 0.1181 2.0 10.4 GX 17+2 9.7 16.6 -28.2 0.0741 1.2 9.6 H1820-303 0.0 18.0 -62.4 -0.0542 -0.8 12.7 HT1900.1-2455 5.4 32.4 -149.7 0.1570 2.1 8.0 GRS 1915+105 3.5 19.6 7.9 0.2000 3.3 9.0 GX 354-0 2.7 47.1 138.2 1.1521 4.3 ------ UNKNOWN 2.2 20.3 45.7 0.3513 5.3 ------ UNKNOWN 2.5 48.0 12.8 0.5964 4.6 ------ UNKNOWN 2.9 12.4 61.3 0.2405 4.0 ------ UNKNOWN 1.1 16.5 146.7 0.6318 10.3 ------ UNKNOWN 1.9 13.3 31.9 0.3632 6.1 ------ UNKNOWN 2.6 50.1 -10.2 0.5434 4.4 ------ UNKNOWN background subtracted image of 15-350 keV band DECcent POSerr Theta Phi PeakCts SNR AngSep Name [deg] ['] [deg] [deg] ['] 1.9 23.3 77.4 0.5232 6.1 2.0 Sco X-1 5.1 52.1 157.0 -0.7671 -2.3 8.7 Her X-1 2.2 25.6 16.7 0.3879 5.3 4.2 4U 1700-377 7.4 24.4 17.4 0.1117 1.6 10.4 GX 349+2 9.4 11.3 22.6 0.0839 1.2 10.5 GX 1+4 26.4 29.8 -1.4 0.0329 0.4 6.0 4U 1735-44 5.5 13.5 169.0 0.1371 2.1 6.3 SW J1753.5-0127 0.0 10.0 -14.8 0.0172 0.3 12.7 GX 5-1 6.6 10.7 -13.4 -0.1219 -1.7 3.2 GRS 1758-258 0.0 4.6 -107.7 0.0884 1.3 12.7 GX 17+2 0.0 16.8 -29.0 0.1285 1.9 12.2 H1820-303 0.0 17.7 -61.9 -0.1179 -1.5 12.2 HT1900.1-2455 4.6 32.5 -149.7 0.2195 2.5 4.5 GRS 1915+105 17.6 19.6 7.6 -0.0442 -0.7 2.9 GX 354-0 0.3 16.5 146.7 2.4666 35.7 ------ UNKNOWN 2.5 57.5 -14.1 1.4725 4.7 ------ UNKNOWN 2.3 33.6 -69.2 0.6142 5.0 ------ UNKNOWN image of 15-350 keV band DECcent POSerr Theta Phi PeakCts SNR AngSep Name [deg] ['] [deg] [deg] ['] 0.2 23.0 28.3 41.6210 51.5 0.3 Sco X-1 4.7 36.0 150.9 -3.4355 -2.4 8.9 Her X-1 0.5 38.2 -10.5 23.8667 23.8 0.7 4U 1700-377 5.0 36.8 -10.8 2.2596 2.3 7.3 GX 349+2 1.3 24.7 -20.3 6.5673 8.8 1.2 GX 1+4 8.2 44.4 -20.9 1.8157 1.4 3.7 4U 1735-44 33.6 6.4 -94.4 0.2534 0.3 9.0 SW J1753.5-0127 5.8 26.3 -35.1 1.7206 2.0 4.1 GX 5-1 0.0 27.0 -34.8 0.3562 0.4 11.5 GRS 1758-258 3.3 18.2 -57.9 2.6910 3.5 5.2 GX 17+2 5.6 33.1 -40.2 -1.8801 -2.1 10.4 H1820-303 26.1 33.4 -58.6 -0.5723 -0.4 9.4 HT1900.1-2455 1.3 28.7 -131.8 8.6206 9.1 0.8 GRS 1915+105 1.0 49.6 -157.6 21.7944 11.5 1.1 Cyg X-1 4.1 33.9 -19.7 2.5729 2.8 6.6 GX 354-0 2.6 22.3 103.9 3.6066 4.4 ------ UNKNOWN 2.7 42.2 12.2 5.2376 4.2 ------ UNKNOWN 3.7 55.3 5.1 10.1460 3.2 ------ UNKNOWN 3.2 54.2 176.9 12.1983 3.6 ------ UNKNOWN 4.2 56.9 179.1 16.9716 2.8 ------ UNKNOWN 3.0 53.7 0.2 9.0225 3.8 ------ UNKNOWN

Analysis Summary

Notes:

Image

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

Light Curves

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:

Time averaged spectrum fit using the average DRM

Power-law model

Cutoff power-law model

1-s peak spectrum fit

Power-law model

Cutoff power-law model

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

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

IMX = -2.469723229948882E-01,

Spacecraft aspect plot

Bright

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