GRB110715A

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: Mon Jan 13 21:47:13 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger457330
======================================================================

  Trigger: 00457330      Segment: 000

  BAT Trigger Time: 332428438.144   [s; MET]
      Trigger Stop: 332428438.272   [s; MET]
               UTC: 2011-07-15T13:13:50.984920    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 237.659654001492   Dec: -46.2333229577073  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    11.86
     Image Trigger?:     NO
     Rate S/N Ratio:     31.3368792319848  [ if not an image trigger ]
     Image S/N Ratio:    11.86

  Analysis Position:   [ source = BAT ]
    RA: 237.659654001492   Dec: -46.2333229577073  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 237.665769488008   Dec: -46.2375908016376  [deg; J2000]  
        { 15h 50m 39.8s , -46d 14' 15.3" }
         +/- 0.450268743488261 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.10565224314534 [arcmin] (formal 1-sigma fit error)
    SNR: 95.0952151054125
 
  Angular difference between the analysis and refined position is 0.360539 arcmin
 
  Partial Coding Fraction: 0.6953125    [ including projection effects ]

  Duration
     T90: 13 +/- 4
        Measured from: -0.143999993801117
                   to: 12.8560000061989     [s; relative to TRIGTIME]
     T50: 2 +/- 1
        Measured from: 0.856000006198883
                   to: 2.85600000619888     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 1.85600000619888     
                   to: 2.85600000619888     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -3.14399999380112     
                   to: 20.8560000061989     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     4.799154   7.256515   5.410025   1.234916
           0.058570   0.061121   0.054070   0.036898 [error]
 Peak      1.381682   2.335981   2.072765   0.546849
           0.022660   0.028406   0.027690   0.016639 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100   24.000   -3.144   20.856
T90    13.000   -0.144   12.856
T50     2.000    0.856    2.856
Peak    1.000    1.856    2.856
 
 
====== 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      -1.626    -0.027      0.027       -           -               -         5.35e-02     -8.10e-04          8.09e-04      81.480   57
CPL     -1.254    -0.115      0.118      119.804     -14.970        26.597      7.68e-02     -7.93e-03          9.04e-03      49.570   56
 
 
=== 1-s peak spectral analysis ===
(Best model with acceptable fit: CPL)
 
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      -1.388     -0.031     0.031       -           -               -         4.44e-01     -7.85e-03          7.85e-03      81.240   57
CPL     -0.985     -0.129     0.133      151.992     -23.021        42.255      6.56e-01     -7.55e-02          8.75e-02      51.460   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   1.85e-06  3.14e-06  4.07e-06  1.07e-05  1.20e-05  1.97e-05   erg/cm2
      90%_error_low -5.92e-08 -6.02e-08 -6.61e-08 -3.90e-07 -1.77e-07 -4.14e-07   erg/cm2
      90%_error_hi   6.00e-08  6.01e-08  6.60e-08  3.99e-07  1.77e-07  4.20e-07   erg/cm2
Peak flux       PL   3.20e-03  4.08e-02  4.44e-01  4.02e+01  1.26e+00  4.04e+01   ph/cm2/s
      90%_error_low     N/A       N/A       N/A       N/A       N/A       N/A     ph/cm2/s
      90%_error_hi      N/A       N/A       N/A       N/A       N/A       N/A     ph/cm2/s
 
Fluence        CPL   1.87e-06  2.53e-06  2.63e-06  6.08e-06  8.78e-06  1.33e-05   erg/cm2
      90%_error_low    N/A       N/A       N/A       N/A       N/A       N/A      erg/cm2
      90%_error_hi     N/A       N/A       N/A       N/A       N/A       N/A      erg/cm2
Peak flux      CPL   1.45e+01  1.78e+01  1.42e+01  1.22e+01  5.24e+01  5.87e+01   ph/cm2/s
      90%_error_low -8.01e-01 -4.17e-01 -3.32e-01 -1.14e+00 -1.16e+00 -1.74e+00   ph/cm2/s
      90%_error_hi   8.19e-01  4.17e-01  3.33e-01  1.29e+00  1.16e+00  1.84e+00   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
  237.6658   -46.2376   0.0020    34.1186  -179.1173        18.1301494     95.095 TRIG_00457330                 
 
Foreground time interval of the image:
 -3.144  12.157 (delta_t =  15.301 [sec])
Background time interval of the image:
-239.144  -3.144 (delta_t = 236.000 [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   -3.144 sec. to   20.856 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.62609     ( -0.0271072   0.0271605 )
Norm@50keV  : 5.35106E-02    ( -0.000809795   0.000809292 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          81.48 using 59 PHA bins.
# Reduced chi-squared =          1.429 for     57 degrees of freedom 
# Null hypothesis probability =   1.837607e-02
 
Photon flux (15-150 keV)    in 24 sec: 6.93336 ( -0.13118  0.1317 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.1976e-05 ( -1.77355e-07  1.76961e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from   -3.144 sec. to   20.856 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.2539     ( -0.114996   0.117752 )
Epeak [keV] : 119.804      ( -14.9703 26.5974 )
Norm@50keV  : 7.68032E-02    ( -0.00792599   0.00903762 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.57 using 59 PHA bins.
# Reduced chi-squared =         0.8853 for     56 degrees of freedom 
# Null hypothesis probability =   7.151320e-01
 
Photon flux (15-150 keV)    in 24 sec: 6.69518 ( -0.14597  0.14702 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.7773e-06 ( 0  0 ) ergs/cm2

1-s peak spectrum fit

Power-law model

Time interval is from    1.856 sec. to    2.856 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.38766     ( -0.030819   0.0308685 )
Norm@50keV  : 0.443734    ( -0.00785242   0.00784781 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          81.24 using 59 PHA bins.
# Reduced chi-squared =          1.425 for     57 degrees of freedom 
# Null hypothesis probability =   1.918626e-02
 
Photon flux (15-150 keV)    in 1 sec: 1.26213 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.29912e-06 ( -7.58388e-08  7.58996e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    1.856 sec. to    2.856 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.984887     ( -0.129127   0.132731 )
Epeak [keV] : 151.992      ( -23.0216 42.2547 )
Norm@50keV  : 0.656164    ( -0.0755282   0.0875334 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.46 using 59 PHA bins.
# Reduced chi-squared =         0.9189 for     56 degrees of freedom 
# Null hypothesis probability =   6.473052e-01
 
Photon flux (15-150 keV)    in 1 sec: 52.4184 ( -1.1578  1.1632 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.24307e-06 ( -7.85016e-08  7.8385e-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 = -6.774431003054280E-01,

Spacecraft aspect plot

Bright

Pre-burst

 Time interval of the image: -239.144000 -3.144000

# RAcent #  [deg] 244.9759 -15.6349 254.4514  35.3461 255.8180 -37.9106 256.3149 -36.4169 263.0014 -24.7345 264.9986 -44.3398 268.3392  -1.4427 270.1788 -25.0501 270.4883 -25.6987 273.9782 -14.0630 275.7514 -30.4809 284.9912 -25.0456 288.8191  10.9305 263.0316 -33.8163 213.5264 -54.4899 205.0959 -30.0001 197.0256 -37.2077 204.4254 -23.8536

Pre-slew

 Time interval of the image: -3.144000 12.156590

# RAcent #  [deg] 244.8959 -15.4444 254.4768  35.4663 256.2242 -37.7494 256.4726 -36.5889 263.0053 -24.7902 264.5793 -44.5732 268.5464  -1.3585 270.1244 -25.0563 270.2634 -25.8132 273.8953 -13.8552 275.7674 -30.3042 284.8758 -25.0289 288.9424  11.0300 263.1301 -33.9411 294.7818 -25.7261 292.6632 -11.0880 289.8841   5.8885 237.6658 -46.2376 209.7835 -57.0824 267.1347  40.5871 249.9193  43.5161

Post-slew

 Time interval of the image: 79.356600 501.456600

# RAcent #  [deg] 170.2965 -60.6354 186.7651 -62.7369 244.9809 -15.6344 255.9401 -38.0119 256.5531 -36.4219 263.1110 -24.7210 264.9247 -44.5409 270.2357 -25.0572 270.2906 -25.8146 275.8493 -30.3976 263.0990 -33.7645 259.8699 -75.7730 184.5608 -60.3252 180.2895 -57.3008 126.8570 -67.1539 127.5583 -66.9381 185.2502 -34.2109

IMY = 1.043730559904359E-02 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] ['] 0.2 9.4 -114.0 12.6353 49.6 0.4 Sco X-1 80.9 50.6 -20.6 0.0889 0.1 0.4 Her X-1 6.1 22.7 157.4 -0.5239 -1.9 8.9 4U 1700-377 3.3 21.2 156.1 0.9848 3.5 5.8 GX 349+2 1.5 12.3 121.7 1.7531 7.7 0.8 GX 1+4 0.0 30.4 145.1 0.4483 1.2 12.8 4U 1735-44 6.2 19.3 25.2 0.5060 1.9 1.8 SW J1753.5-0127 4.0 17.5 106.2 0.8694 2.9 6.0 GX 5-1 7.5 18.1 107.5 0.4606 1.5 10.4 GRS 1758-258 2.5 18.7 68.6 1.3364 4.7 2.3 GX 17+2 4.2 24.6 111.6 1.0459 2.7 11.3 H1820-303 6.7 30.0 93.6 0.8327 1.7 7.9 HT1900.1-2455 2.4 42.7 33.9 3.1533 4.7 1.5 GRS 1915+105 4.0 20.0 139.2 0.8734 2.9 2.4 GX 354-0 2.7 50.5 -170.6 2.7319 4.2 ------ UNKNOWN 3.2 47.7 -137.2 2.9929 3.7 ------ UNKNOWN 3.8 55.3 -145.3 6.2462 3.0 ------ UNKNOWN 3.0 47.9 -128.9 5.5170 3.9 ------ UNKNOWN background subtracted image of 15-350 keV band DECcent POSerr Theta Phi PeakCts SNR AngSep Name [deg] ['] [deg] [deg] ['] 0.0 9.5 -112.8 -0.2589 -1.8 12.7 Sco X-1 8.1 50.7 -20.6 0.5486 1.4 7.5 Her X-1 0.0 22.5 156.6 -0.3509 -2.0 12.6 4U 1700-377 12.0 21.4 155.8 -0.1698 -1.0 10.1 GX 349+2 6.4 12.3 121.8 0.2656 1.8 2.7 GX 1+4 12.3 30.5 145.8 -0.1998 -0.9 10.2 4U 1735-44 0.0 19.5 25.5 0.1109 0.7 12.1 SW J1753.5-0127 17.8 17.5 106.3 0.1224 0.6 8.8 GX 5-1 5.2 18.0 108.2 0.3945 2.2 4.7 GRS 1758-258 0.0 18.6 67.9 0.2505 1.4 12.6 GX 17+2 3.9 24.5 111.3 -0.6309 -2.9 9.0 H1820-303 6.8 29.9 93.6 -0.4651 -1.7 10.9 HT1900.1-2455 0.0 42.9 33.9 1.2189 2.7 9.9 GRS 1915+105 23.1 20.2 139.1 -0.0910 -0.5 9.5 GX 354-0 2.7 38.8 92.0 3.0225 4.3 ------ UNKNOWN 2.3 37.1 68.0 2.4822 5.0 ------ UNKNOWN 2.6 40.7 41.1 1.7858 4.4 ------ UNKNOWN 0.1 34.1 -179.1 18.1304 95.1 ------ UNKNOWN 2.4 53.7 -171.9 2.0961 4.8 ------ UNKNOWN 3.9 57.0 -9.1 2.2358 3.0 ------ UNKNOWN 3.4 58.9 -24.4 3.4301 3.4 ------ UNKNOWN image of 15-350 keV band DECcent POSerr Theta Phi PeakCts SNR AngSep Name [deg] ['] [deg] [deg] ['] 12.7 40.6 -127.4 0.8368 0.9 0.9 Cen X-3 4.7 32.7 -130.3 1.4109 2.4 3.6 GX 301-2 0.3 31.2 22.3 21.1650 40.0 0.4 Sco X-1 29.0 15.8 73.9 -0.1680 -0.4 10.3 4U 1700-377 4.5 17.2 70.6 1.0623 2.5 5.7 GX 349+2 2.4 29.6 60.8 3.4139 4.8 5.8 GX 1+4 6.0 19.1 103.5 0.9056 1.9 9.5 4U 1735-44 5.1 33.5 70.7 1.9984 2.3 2.9 GX 5-1 5.9 33.0 71.7 1.6586 2.0 4.3 GRS 1758-258 16.2 33.4 83.9 0.6532 0.7 4.3 H1820-303 5.6 23.0 74.8 1.1119 2.1 6.9 GX 354-0 3.7 31.0 178.1 1.4821 3.1 ------ UNKNOWN 3.7 33.6 -125.8 1.9239 3.1 ------ UNKNOWN 3.5 36.0 -120.8 2.5517 3.3 ------ UNKNOWN 4.7 55.3 -145.3 9.0359 2.5 ------ UNKNOWN 5.6 55.2 -144.9 7.3849 2.2 ------ UNKNOWN 3.2 41.0 -83.7 9.1202 3.7 ------ 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

Mask shadow pattern

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