GRB070612B

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 20 09:01:18 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger282073
======================================================================

  Trigger: 00282073      Segment: 000

  BAT Trigger Time: 203322079.808   [s; MET]
      Trigger Stop: 203322080.832   [s; MET]
               UTC: 2007-06-12T06:21:17.791640    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 261.71324680189   Dec: -8.71856235251288  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9.09
     Image Trigger?:     NO
     Rate S/N Ratio:     21.4009345590327  [ if not an image trigger ]
     Image S/N Ratio:    9.09

  Analysis Position:   [ source = BAT ]
    RA: 261.71324680189   Dec: -8.71856235251288  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 261.712313126849   Dec: -8.74856210671172  [deg; J2000]  
        { 17h 26m 51.0s , -08d 44' 54.8" }
         +/- 1.24831944001161 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.504350747718402 [arcmin] (formal 1-sigma fit error)
    SNR: 22.1569607736712
 
  Angular difference between the analysis and refined position is 1.800837 arcmin
 
  Partial Coding Fraction: 0.1796875    [ including projection effects ]

  Duration
     T90: 18 +/- 4.47213595499958
        Measured from: -9.80799999833107
                   to: 8.19200000166893     [s; relative to TRIGTIME]
     T50: 6 +/- 1.4142135623731
        Measured from: -2.80799999833107
                   to: 3.19200000166893     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.19200000166893     
                   to: 1.19200000166893     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -13.8079999983311     
                   to: 10.1920000016689     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.770081   1.063645   0.846330   0.167075
           0.071867   0.067296   0.058485   0.046637 [error]
 Peak      0.041583   0.101785   0.123027   0.028539
           0.015240   0.014837   0.015315   0.011101 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100   24.000  -13.808   10.192
T90    18.000   -9.808    8.192
T50     6.000   -2.808    3.192
Peak    1.000    0.192    1.192
 
 
====== 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      -1.558    -0.121      0.120       -           -               -         8.08e-03     -5.64e-04          5.63e-04      58.250   57
CPL     -1.085    -0.463      0.518      100.751     -28.736       823.582      1.37e-02     -5.44e-03          1.03e-02      55.180   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      -1.033     -0.239     0.246       -           -               -         2.02e-02     -3.13e-03          3.11e-03      68.720   57
CPL      0.891     -1.274     1.767       88.641     -18.980        59.642      1.33e-01     -1.33e-01          5.82e-01      61.160   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   2.61e-07  4.64e-07  6.30e-07  1.76e-06  1.82e-06  3.12e-06   erg/cm2
      90%_error_low -3.14e-08 -3.45e-08 -5.57e-08 -3.15e-07 -1.35e-07 -3.60e-07   erg/cm2
      90%_error_hi   3.26e-08  3.43e-08  5.55e-08  3.58e-07  1.36e-07  3.92e-07   erg/cm2
Peak flux       PL   5.32e-01  7.08e-01  6.92e-01  1.21e+00  2.33e+00  3.14e+00   ph/cm2/s
      90%_error_low -1.51e-01 -1.35e-01 -1.11e-01 -3.53e-01 -3.68e-01 -4.94e-01   ph/cm2/s
      90%_error_hi   1.69e-01  1.34e-01  1.10e-01  4.29e-01  3.71e-01  5.06e-01   ph/cm2/s
 
Fluence        CPL   2.38e-07  4.83e-07  6.53e-07  9.46e-07  1.77e-06  2.32e-06   erg/cm2
      90%_error_low -3.82e-08 -3.98e-08 -6.16e-08 -4.06e-07 -1.46e-07 -4.29e-07   erg/cm2
      90%_error_hi   3.92e-08  4.06e-08  6.28e-08  7.96e-07  1.46e-07  7.93e-07   erg/cm2
Peak flux      CPL   3.03e-01  7.46e-01  8.48e-01  3.67e-01  2.17e+00  2.26e+00   ph/cm2/s
      90%_error_low -1.55e-01 -1.63e-01 -1.50e-01     N/A   -3.71e-01 -4.28e-01   ph/cm2/s
      90%_error_hi   2.01e-01  1.62e-01  1.55e-01     N/A    3.79e-01  5.17e-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
  261.7123    -8.7486   0.0087    35.5458    89.8350         3.0603078     22.157 TRIG_00282073                 
 
Foreground time interval of the image:
-13.808  10.192 (delta_t =  24.000 [sec])
Background time interval of the image:
-239.808 -13.808 (delta_t = 226.000 [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  -13.808 sec. to   10.192 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.55836     ( -0.121106   0.120405 )
Norm@50keV  : 8.07506E-03    ( -0.000563968   0.00056295 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.25 using 59 PHA bins.
# Reduced chi-squared =          1.022 for     57 degrees of freedom 
# Null hypothesis probability =   4.292928e-01
 
Photon flux (15-150 keV)    in 24 sec: 1.02478 ( -0.074466  0.07468 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.82256e-06 ( -1.35145e-07  1.35887e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -13.808 sec. to   10.192 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.08453     ( -0.463271   0.517737 )
Epeak [keV] : 100.751      ( -28.7361 823.581 )
Norm@50keV  : 1.37228E-02    ( -0.00543798   0.0103469 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.18 using 59 PHA bins.
# Reduced chi-squared =         0.9853 for     56 degrees of freedom 
# Null hypothesis probability =   5.059459e-01
 
Photon flux (15-150 keV)    in 24 sec: 0.999476 ( -0.078295  0.078464 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.77032e-06 ( -1.45736e-07  1.45576e-07 ) ergs/cm2

1-s peak spectrum fit

Power-law model

Time interval is from    0.192 sec. to    1.192 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.03323     ( -0.239526   0.245829 )
Norm@50keV  : 2.01874E-02    ( -0.00312756   0.00311285 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          68.72 using 59 PHA bins.
# Reduced chi-squared =          1.206 for     57 degrees of freedom 
# Null hypothesis probability =   1.373650e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.32874 ( -0.36818  0.37061 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.15809e-07 ( -3.4224e-08  3.4381e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.192 sec. to    1.192 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.891418     ( -1.27446   1.76722 )
Epeak [keV] : 88.6407      ( -18.9798 59.642 )
Norm@50keV  : 0.133053    ( -0.133054   0.58235 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.16 using 59 PHA bins.
# Reduced chi-squared =          1.092 for     56 degrees of freedom 
# Null hypothesis probability =   2.960972e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.16888 ( -0.37127  0.37915 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.0246e-07 ( -3.74957e-08  3.71418e-08 ) ergs/cm2

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = 18.0 sec.
Hardness ratio (energy fluence ratio) = 1.35815713157

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

S(15-50 keV)  = 7.249096e-07
S(50-150 keV) = 1.0976575e-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 = 2.057631575734852E-03,

Spacecraft aspect plot

Bright

Pre-burst

 Time interval of the image: -239.808000 -13.808000

# RAcent #  [deg] 244.9849 -15.6383 256.1359 -37.9461 256.3283 -36.4039 262.8997 -24.7181 264.7999 -44.5758 268.2823  -1.5354 270.4097 -25.1838 270.2740 -25.9034 274.0168 -13.9153 275.8995 -30.3488 284.8027 -24.9046 262.8799 -33.7645 314.1268  -8.9447 263.8328 -50.6086 313.4719 -30.2988 311.0500 -84.3920 340.6186 -53.8157 341.9257 -42.5534

Pre-slew

 Time interval of the image: -13.808000 10.192000

# RAcent #  [deg] 244.9690 -15.8071 256.0837 -37.9652 256.5367 -36.5425 262.9534 -24.7802 264.7381 -44.4937 268.2377  -1.3812 270.4431 -25.0384 270.3625 -25.8869 274.0077 -14.0363 275.8730 -30.4369 284.9709 -25.0771 262.8834 -33.7157 261.7123  -8.7486 302.6103 -23.4566 252.1754 -67.7938 196.9465 -69.3184 336.9825 -66.8645

Post-slew

 Time interval of the image: 217.292590 640.492600

# RAcent #  [deg] 254.6368  35.3110 268.2638  -1.5615 288.7972  10.9321 299.5794  35.1960 308.1004  40.9411 326.1749  38.3211 275.6349  -1.7219 231.0442  40.8487 285.9775  73.7671

IMY = -7.144969436025950E-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] ['] 0.5 41.0 62.4 22.6915 22.5 0.3 Sco X-1 4.2 22.0 31.7 0.5022 2.7 9.4 4U 1700-377 2.3 22.2 35.8 0.9446 4.9 5.3 GX 349+2 4.0 22.4 70.4 0.7155 2.9 6.2 GX 1+4 5.1 16.0 9.7 0.3939 2.2 7.9 4U 1735-44 5.8 39.2 104.7 -1.7238 -2.0 7.1 SW J1753.5-0127 26.2 17.3 84.0 -0.0883 -0.4 9.3 GX 5-1 4.1 16.8 82.1 0.5810 2.9 9.7 GRS 1758-258 4.9 25.7 107.1 0.6721 2.3 7.3 GX 17+2 5.7 10.2 85.9 0.4013 2.0 1.7 H1820-303 0.0 13.1 132.8 -0.2457 -1.2 12.7 HT1900.1-2455 5.1 17.7 47.6 0.4516 2.3 6.9 GX 354-0 2.2 39.6 -179.0 1.4724 5.3 ------ UNKNOWN 2.5 19.2 -7.4 0.8004 4.7 ------ UNKNOWN 2.6 25.3 -148.4 0.8049 4.4 ------ UNKNOWN 4.7 47.1 -53.1 2.6936 2.5 ------ UNKNOWN 3.2 41.1 -98.1 4.7440 3.6 ------ UNKNOWN 3.2 43.4 -114.6 3.3104 3.6 ------ UNKNOWN background subtracted image of 15-350 keV band DECcent POSerr Theta Phi PeakCts SNR AngSep Name [deg] ['] [deg] [deg] ['] 6.9 40.9 62.2 -0.3425 -1.7 10.0 Sco X-1 5.8 22.1 31.6 -0.1064 -2.0 8.6 4U 1700-377 14.0 22.0 35.5 -0.0436 -0.8 8.7 GX 349+2 18.2 22.3 70.4 0.0411 0.6 3.7 GX 1+4 5.3 16.0 10.1 0.1035 2.2 2.6 4U 1735-44 8.0 39.4 104.7 -0.3079 -1.4 8.9 SW J1753.5-0127 4.2 17.4 84.3 -0.1590 -2.8 9.0 GX 5-1 27.7 16.8 82.3 0.0236 0.4 9.2 GRS 1758-258 27.3 25.6 107.0 0.0321 0.4 0.1 GX 17+2 20.4 10.2 85.5 -0.0273 -0.6 5.0 H1820-303 7.4 12.9 133.6 -0.0808 -1.5 10.0 HT1900.1-2455 7.5 17.7 47.7 -0.0840 -1.5 8.9 GX 354-0 0.5 35.5 89.8 3.0611 22.1 ------ UNKNOWN 2.4 21.4 -177.0 0.2364 4.9 ------ UNKNOWN 2.6 34.7 -29.0 0.2696 4.5 ------ UNKNOWN 2.3 53.9 -23.8 0.7681 5.0 ------ UNKNOWN 2.4 41.2 -78.0 0.8714 4.8 ------ UNKNOWN image of 15-350 keV band DECcent POSerr Theta Phi PeakCts SNR AngSep Name [deg] ['] [deg] [deg] ['] 17.6 38.7 170.3 0.2560 0.7 9.0 Her X-1 6.3 40.6 107.2 1.7816 1.8 9.0 SW J1753.5-0127 0.7 18.0 89.4 4.8588 16.9 0.8 GRS 1915+105 0.3 8.9 -120.5 7.9600 35.2 0.6 Cyg X-1 0.9 16.5 -99.0 3.1438 12.7 0.8 Cyg X-3 20.3 25.9 -68.7 0.1943 0.6 0.2 Cyg X-2 3.0 35.9 98.1 2.2187 3.8 ------ UNKNOWN 2.7 56.9 179.1 6.8609 4.3 ------ UNKNOWN 2.7 48.0 -129.0 5.3816 4.3 ------ 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