GRB160501A

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 Jun  1 15:28:04 EDT 2016
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger684679
======================================================================

  Trigger: 00684679      Segment: 000

  BAT Trigger Time: 483756048   [s; MET]
      Trigger Stop: 483756112   [s; MET]
               UTC: 2016-05-01T00:40:31.797220    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 286.376860952753   Dec: -17.2398515642378  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    11.34
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    11.34

  Analysis Position:   [ source = BAT ]
    RA: 286.376860952753   Dec: -17.2398515642378  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 286.37981860683   Dec: -17.2400939882568  [deg; J2000]  
        { 19h 05m 31.2s , -17d 14' 24.3" }
         +/- 2.05957974755527 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.884931399361301 [arcmin] (formal 1-sigma fit error)
    SNR: 10.8358558531747
 
  Angular difference between the analysis and refined position is 0.170109 arcmin
 
  Partial Coding Fraction: 0.8125    [ including projection effects ]

  Duration
     T90: N/A +/- N/A 
        Measured from: N/A
                   to: N/A     [s; relative to TRIGTIME]
     T50: N/A +/-  N/A
        Measured from: N/A
                   to: N/A     [s; relative to TRIGTIME]

    WARNING: battblocks failed.  Used TDRSS fore/background intervals

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100     N/A      N/A      N/A 
T90      N/A      N/A      N/A 
T50      N/A      N/A      N/A 
Peak     N/A      N/A      N/A 
 
 
====== 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      -2.278    -0.252      0.233       -           -               -         1.00e-03     -1.78e-04          1.75e-04      44.250   57
CPL     -0.638    -1.213      1.588       31.317      N/A           N/A         1.01e-02        N/A               N/A         38.570   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      N/A         N/A       N/A          -           -               -           N/A           N/A               N/A         N/A        N/A   
CPL     N/A         N/A       N/A          N/A         N/A           N/A           N/A           N/A               N/A         N/A        N/A   
 
 
=== 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   1.71e-07  1.97e-07  1.62e-07  2.24e-07  6.12e-07  7.55e-07   erg/cm2
      90%_error_low -2.75e-08 -2.56e-08 -3.78e-08 -8.66e-08 -8.96e-08 -1.42e-07   erg/cm2
      90%_error_hi   2.81e-08  2.54e-08  3.97e-08  1.18e-07  9.21e-08  1.64e-07   erg/cm2
Peak flux       PL     N/A      N/A      N/A      N/A      N/A      N/A     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
  286.3798   -17.2401   0.0178    19.5454  -118.4072         1.2420216     10.836 TRIG_00684679                 
 
Foreground time interval of the image:
  0.000  64.000 (delta_t =  64.000 [sec])
Background time interval of the image:

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    0.000 sec. to   64.000 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.27825     ( -0.252467   0.233464 )
Norm@50keV  : 1.00372E-03    ( -0.00017773   0.00017462 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          44.25 using 59 PHA bins.
# Reduced chi-squared =         0.7763 for     57 degrees of freedom 
# Null hypothesis probability =   8.912930e-01
 
Photon flux (15-150 keV)    in 64 sec: 0.173330 ( -0.021481  0.021487 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.11603e-07 ( -8.96038e-08  9.21331e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.000 sec. to   64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.638093     ( -1.21977   1.58083 )
Epeak [keV] : 31.3174      (   )
Norm@50keV  : 1.00556E-02    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          38.57 using 59 PHA bins.
# Reduced chi-squared =         0.6888 for     56 degrees of freedom 
# Null hypothesis probability =   9.634552e-01
 
Photon flux (15-150 keV)    in 64 sec: 0.165160 ( -0.021889  0.022021 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.37613e-07 ( -8.35149e-08  9.6023e-08 ) ergs/cm2

1-s peak spectrum fit

1-s peak spectrum unavailable, because battblocks failed to determine burst durations.

Time-resolved spectra

Time-resolved spectra unavailable, because battblocks failed to determine burst durations.

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 = -1.688906794539408E-01,

Spacecraft aspect plot

Bright

Pre-burst

 Time interval of the image:

Pre-slew

 Time interval of the image: 0.000000 64.000000

# RAcent #  [deg] 244.9874 -15.6415 255.9718 -37.8727 256.3333 -36.4365 262.9110 -24.5755 264.7400 -44.4497 268.2892  -1.5923 270.2365 -24.9218 270.1723 -25.8019 274.0578 -14.0833 276.1142 -30.2322 285.1688 -24.7990 288.7228  10.9041 263.1623 -33.8700 236.5413  -9.2356 259.7272  29.3054 286.3798 -17.2401 310.6479 -62.1753 316.1488 -41.7583 312.4230 -25.9241

Post-slew

 Time interval of the image: 117.300600 963.070000

# RAcent #  [deg] 245.0104 -15.6378 255.9932 -37.8510 256.5742 -36.5708 262.9992 -24.6068 264.6337 -44.4538 268.2278  -1.5005 270.1157 -25.0362 270.2003 -25.7492 274.0115 -14.0440 276.0247 -30.4737 285.2237 -25.0464 288.8201  10.9552 299.5686  35.2125 262.8188 -33.9636 276.4323   3.4160 301.7173  38.8723

IMY = 3.122635234765540E-01 source in the pre-burst/pre-slew/post-slew images

image of 15-350 keV band background subtracted image of 15-350 keV band DECcent POSerr Theta Phi PeakCts SNR AngSep Name [deg] ['] [deg] [deg] ['] 0.5 22.6 100.3 2.9108 21.8 0.5 Sco X-1 0.7 16.1 23.7 1.7589 16.0 1.8 4U 1700-377 5.1 14.8 26.4 0.2507 2.3 5.0 GX 349+2 7.5 3.8 83.2 0.1579 1.5 11.5 GX 1+4 15.9 19.7 -4.5 0.0761 0.7 0.1 4U 1735-44 10.6 23.2 173.8 0.1176 1.1 9.6 SW J1753.5-0127 38.1 2.9 -96.4 0.0315 0.3 9.8 GX 5-1 5.5 3.0 -79.3 0.2158 2.1 7.9 GRS 1758-258 2.7 12.6 -156.5 0.4637 4.3 4.1 GX 17+2 0.0 9.7 -63.4 0.1405 1.3 12.7 H1820-303 23.2 16.4 -95.6 -0.0574 -0.5 10.3 HT1900.1-2455 4.1 41.5 -156.2 0.4594 2.8 5.1 GRS 1915+105 6.5 9.7 10.1 -0.1911 -1.8 8.9 GX 354-0 2.7 32.9 103.5 0.9075 4.4 ------ UNKNOWN 2.2 54.6 162.8 3.2771 5.1 ------ UNKNOWN 1.1 19.5 -118.4 1.2419 10.8 ------ UNKNOWN 2.1 47.3 -35.4 1.3473 5.5 ------ UNKNOWN 2.7 43.7 -64.1 2.2481 4.2 ------ UNKNOWN 3.4 40.8 -87.8 1.5842 3.4 ------ UNKNOWN image of 15-350 keV band DECcent POSerr Theta Phi PeakCts SNR AngSep Name [deg] ['] [deg] [deg] ['] 1.2 39.6 95.3 29.0860 9.6 1.8 Sco X-1 0.7 33.6 55.3 21.6945 16.8 0.5 4U 1700-377 6.0 32.6 56.9 2.4532 1.9 11.1 GX 349+2 5.6 23.0 76.6 1.8206 2.1 8.3 GX 1+4 4.8 32.8 38.4 2.5926 2.4 4.7 4U 1735-44 11.7 23.8 138.7 0.7852 1.0 8.9 SW J1753.5-0127 16.1 17.0 69.2 0.5048 0.7 9.5 GX 5-1 3.9 17.2 66.9 2.1441 3.0 5.5 GRS 1758-258 1.0 12.3 112.5 8.3600 11.7 0.6 GX 17+2 5.7 16.2 42.8 1.4146 2.0 8.2 H1820-303 0.0 7.9 16.8 0.9604 1.3 12.7 HT1900.1-2455 1.2 28.3 -165.7 6.7072 9.6 1.4 GRS 1915+105 1.0 53.9 -157.5 26.8991 12.0 1.2 Cyg X-1 0.0 26.9 56.3 1.6368 1.9 11.5 GX 354-0 3.4 22.9 162.9 2.3703 3.4 ------ UNKNOWN 5.2 57.9 -156.8 11.5174 2.2 ------ 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

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

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

Mask shadow pattern

Spacecraft aspect plot

Bright

Pre-burst Time interval of the image:

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

Pre-burst
Time interval of the image: