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 00:37:36 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger534015
======================================================================
Trigger: 00534015 Segment: 000
BAT Trigger Time: 369659780.288 [s; MET]
Trigger Stop: 369659781.312 [s; MET]
UTC: 2012-09-18T11:16:10.624900 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 181.053946302635 Dec: -32.7576526591057 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 12.04
Image Trigger?: NO
Rate S/N Ratio: 21.51743479135 [ if not an image trigger ]
Image S/N Ratio: 12.04
Analysis Position: [ source = BAT ]
RA: 181.053946302635 Dec: -32.7576526591057 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 181.042274021015 Dec: -32.7623104417412 [deg; J2000]
{ 12h 04m 10.1s , -32d 45' 44.3" }
+/- 1.13833367413494 [arcmin] (estimated 90% radius based on SNR)
+/- 0.454785526709033 [arcmin] (formal 1-sigma fit error)
SNR: 25.2774500554093
Angular difference between the analysis and refined position is 0.651888 arcmin
Partial Coding Fraction: 0.15625 [ including projection effects ]
Duration
T90: 25.095999956131 +/- 2.46916989103431
Measured from: -1.85199999809265
to: 23.2439999580383 [s; relative to TRIGTIME]
T50: 8.09599995613098 +/- 0.799622431797607
Measured from: 0.752000033855438
to: 8.84799998998642 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.283999979496002
to: 0.716000020503998 [s; relative to TRIGTIME]
Total Fluence
Measured from: -2.86000001430511
to: 23.9160000085831 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.295331 1.873860 1.415511 0.250458
0.083614 0.086800 0.075870 0.061607 [error]
Peak 0.113173 0.211930 0.173875 0.053659
0.018298 0.019650 0.018480 0.013297 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 26.776 -2.860 23.916
T90 25.096 -1.852 23.244
T50 8.096 0.752 8.848
Peak 1.000 -0.284 0.716
====== 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: 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 -1.598 -0.092 0.091 - - - 1.23e-02 -6.66e-04 6.64e-04 62.760 57
CPL -1.002 -0.374 0.410 85.920 -16.764 57.321 2.43e-02 -8.24e-03 1.39e-02 55.010 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 -1.362 -0.170 0.169 - - - 3.72e-02 -3.91e-03 3.90e-03 72.060 57
CPL -0.525 -0.726 0.875 95.533 -25.070 226.555 9.28e-02 -5.00e-02 1.41e-01 68.120 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 4.62e-07 8.01e-07 1.06e-06 2.85e-06 3.09e-06 5.17e-06 erg/cm2
90%_error_low -4.18e-08 -4.51e-08 -7.28e-08 -3.97e-07 -1.76e-07 -4.57e-07 erg/cm2
90%_error_hi 4.30e-08 4.49e-08 7.26e-08 4.36e-07 1.77e-07 4.87e-07 erg/cm2
Peak flux PL 1.34e+00 1.46e+00 1.14e+00 1.46e+00 4.49e+00 5.40e+00 ph/cm2/s
90%_error_low -2.42e-01 -1.73e-01 -1.41e-01 -3.34e-01 -4.86e-01 -5.75e-01 ph/cm2/s
90%_error_hi 2.56e-01 1.71e-01 1.39e-01 3.85e-01 4.87e-01 5.78e-01 ph/cm2/s
Fluence CPL 4.14e-07 8.46e-07 1.10e-06 1.32e-06 2.98e-06 3.69e-06 erg/cm2
90%_error_low -5.07e-08 -5.36e-08 -8.12e-08 -4.65e-07 -1.91e-07 -4.98e-07 erg/cm2
90%_error_hi 5.17e-08 5.46e-08 8.23e-08 7.76e-07 1.91e-07 7.79e-07 erg/cm2
Peak flux CPL 1.12e+00 1.56e+00 1.25e+00 7.09e-01 4.37e+00 4.64e+00 ph/cm2/s
90%_error_low -2.99e-01 -1.99e-01 -1.74e-01 -3.26e-01 -5.00e-01 -6.17e-01 ph/cm2/s
90%_error_hi 3.15e-01 2.05e-01 1.79e-01 6.24e-01 5.00e-01 7.55e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 181.0423 -32.7623 0.0076 37.6305 -91.2288 5.0286099 25.277 TRIG_00534015 Foreground time interval of the image: -2.860 23.916 (delta_t = 26.776 [sec]) Background time interval of the image: -239.288 -2.860 (delta_t = 236.428 [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
- 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 -2.860 sec. to 23.916 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.59755 ( -0.0918006 0.0912048 ) Norm@50keV : 1.23415E-02 ( -0.000665764 0.000664469 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 62.76 using 59 PHA bins. # Reduced chi-squared = 1.101 for 57 degrees of freedom # Null hypothesis probability = 2.795382e-01 Photon flux (15-150 keV) in 26.78 sec: 1.58479 ( -0.08797 0.08815 ) ph/cm2/s Energy fluence (15-150 keV) : 3.09229e-06 ( -1.76468e-07 1.77132e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -2.860 sec. to 23.916 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.00182 ( -0.374442 0.409768 ) Epeak [keV] : 85.9199 ( -16.7641 57.3206 ) Norm@50keV : 2.42761E-02 ( -0.00823625 0.01392 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 55.01 using 59 PHA bins. # Reduced chi-squared = 0.9823 for 56 degrees of freedom # Null hypothesis probability = 5.124232e-01 Photon flux (15-150 keV) in 26.78 sec: 1.53829 ( -0.09238 0.0925 ) ph/cm2/s Energy fluence (15-150 keV) : 2.98051e-06 ( -1.91044e-07 1.91109e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from -0.284 sec. to 0.716 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.36179 ( -0.170043 0.169487 ) Norm@50keV : 3.71907E-02 ( -0.00390636 0.0039022 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 72.06 using 59 PHA bins. # Reduced chi-squared = 1.264 for 57 degrees of freedom # Null hypothesis probability = 8.632037e-02 Photon flux (15-150 keV) in 1 sec: 4.49148 ( -0.48578 0.48675 ) ph/cm2/s Energy fluence (15-150 keV) : 3.62326e-07 ( -4.11523e-08 4.1338e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.284 sec. to 0.716 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.524533 ( -0.726441 0.875137 ) Epeak [keV] : 95.5326 ( -25.0691 226.556 ) Norm@50keV : 9.27815E-02 ( -0.0500117 0.140619 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 68.12 using 59 PHA bins. # Reduced chi-squared = 1.216 for 56 degrees of freedom # Null hypothesis probability = 1.284571e-01 Photon flux (15-150 keV) in 1 sec: 4.36752 ( -0.4998 0.49968 ) ph/cm2/s Energy fluence (15-150 keV) : 3.5076e-07 ( -4.3483e-08 4.32706e-08 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 25.096 sec. Hardness ratio (energy fluence ratio) = 1.30575003483
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 1.2593437e-06 S(50-150 keV) = 1.7211671e-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 = -1.653280851973350E-02, IMY = 7.707761230919873E-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: -239.288000 -2.860000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 135.5876 -40.5466 4.4 51.1 -141.6 2.8354 2.6 2.7 Vela X-1 170.0159 -60.5637 8.6 22.1 -142.7 0.2947 1.3 9.5 Cen X-3 186.6944 -62.7753 1.3 13.9 -140.8 1.9511 9.0 1.1 GX 301-2 244.9788 -15.6360 1.2 50.9 -1.4 5.0796 9.3 0.3 Sco X-1 256.1448 -37.8588 365.6 34.1 25.3 -0.0095 -0.0 7.5 4U 1700-377 256.4903 -36.5133 4.1 35.4 24.5 0.8533 2.8 6.0 GX 349+2 263.1407 -24.8172 6.3 48.4 23.8 -1.3197 -1.8 8.4 GX 1+4 264.9595 -44.5952 6.8 32.4 42.2 0.5073 1.7 12.7 4U 1735-44 270.2796 -24.9406 4.8 51.3 31.4 -2.7337 -2.4 8.3 GX 5-1 270.4499 -25.7937 12.3 50.6 32.1 1.0133 0.9 8.5 GRS 1758-258 263.1255 -33.9906 501.5 40.3 30.0 0.0094 0.0 11.6 GX 354-0 292.3724 -50.5981 2.6 40.4 72.3 3.9325 4.5 ------ UNKNOWN 266.3020 -26.3842 1.2 48.3 28.2 7.2315 9.7 ------ UNKNOWN 43.0478 -74.2108 2.3 43.1 145.7 2.5350 5.0 ------ UNKNOWN 75.8079 -71.1585 3.3 43.6 160.4 1.5710 3.6 ------ UNKNOWN 256.7743 -32.5251 2.3 39.0 21.6 1.7811 5.0 ------ UNKNOWN 254.1125 -73.8043 2.2 17.1 108.9 1.1665 5.2 ------ UNKNOWN 248.5211 -47.4085 0.9 23.1 26.7 2.6260 12.6 ------ UNKNOWN 113.9624 -42.2415 3.8 58.8 -159.2 5.7527 3.1 ------ UNKNOWN 226.4991 -4.3088 3.0 58.7 -25.9 5.2017 3.8 ------ UNKNOWN 174.1178 -31.8594 5.9 41.1 -98.8 3.0609 2.5 ------ UNKNOWN UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -2.860000 23.916000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 135.4810 -40.5258 19.2 51.2 -141.7 -0.1865 -0.6 2.8 Vela X-1 170.2065 -60.4886 5.3 22.0 -142.4 -0.1471 -2.2 8.7 Cen X-3 186.5032 -62.9706 0.0 14.0 -141.6 -0.1307 -2.1 12.7 GX 301-2 244.8810 -15.6252 113.0 50.8 -1.6 -0.0142 -0.1 5.8 Sco X-1 255.8186 -37.9694 0.0 33.9 25.0 0.1554 1.8 10.9 4U 1700-377 256.5919 -36.5312 6.7 35.5 24.6 -0.1500 -1.7 10.0 GX 349+2 263.0275 -24.6534 6.1 48.5 23.6 0.3253 1.9 5.6 GX 1+4 264.5912 -44.3059 14.0 32.5 41.5 0.0739 0.8 10.8 4U 1735-44 270.3059 -25.1179 4.0 51.1 31.6 -0.9153 -2.9 2.6 GX 5-1 270.3569 -25.8866 24.3 50.5 32.1 0.1387 0.5 9.1 GRS 1758-258 262.8306 -33.7715 4.2 40.4 29.5 -0.3068 -2.8 8.8 GX 354-0 181.0423 -32.7623 0.5 37.6 -91.2 5.0272 25.3 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: