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 04:43:55 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger519380
======================================================================
Trigger: 00519380 Segment: 000
BAT Trigger Time: 355236670.464 [s; MET]
Trigger Stop: 355236674.56 [s; MET]
UTC: 2012-04-04T12:51:02.398680 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 235.011568820105 Dec: 12.8818416005109 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 11.42
Image Trigger?: NO
Rate S/N Ratio: 9.1104335791443 [ if not an image trigger ]
Image S/N Ratio: 11.42
Analysis Position: [ source = BAT ]
RA: 235.011568820105 Dec: 12.8818416005109 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 235.001396175834 Dec: 12.8823655625681 [deg; J2000]
{ 15h 40m 00.3s , +12d 52' 56.5" }
+/- 1.23657011549787 [arcmin] (estimated 90% radius based on SNR)
+/- 0.504010405914631 [arcmin] (formal 1-sigma fit error)
SNR: 22.4583224717566
Angular difference between the analysis and refined position is 0.595826 arcmin
Partial Coding Fraction: 0.4921875 [ including projection effects ]
Duration
T90: 38.7239999175072 +/- 4.09199215645658
Measured from: -4.42399996519089
to: 34.2999999523163 [s; relative to TRIGTIME]
T50: 17.4879999756813 +/- 2.87687884838602
Measured from: 2.41600000858307
to: 19.9039999842644 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 3.28799998760223
to: 4.28799998760223 [s; relative to TRIGTIME]
Total Fluence
Measured from: -7.30799996852875
to: 38.4520000219345 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.833233 1.050652 0.624662 0.161767
0.059704 0.059428 0.052816 0.048608 [error]
Peak 0.040435 0.054232 0.031727 0.015041
0.009051 0.009143 0.007988 0.007330 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 45.760 -7.308 38.452
T90 38.724 -4.424 34.300
T50 17.488 2.416 19.904
Peak 1.000 3.288 4.288
====== 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 -1.853 -0.132 0.129 - - - 3.75e-03 -2.86e-04 2.82e-04 72.830 57
CPL -1.814 -0.633 0.500 226.294 -226.283 -226.294 3.93e-03 -1.83e-03 3.21e-03 72.810 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 -1.839 -0.391 0.367 - - - 8.28e-03 -1.97e-03 1.90e-03 70.040 57
CPL -1.828 -1.469 1.791 664.752 N/A N/A 8.41e-03 N/A N/A 70.040 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 3.05e-07 4.52e-07 5.01e-07 1.05e-06 1.58e-06 2.30e-06 erg/cm2
90%_error_low -3.35e-08 -3.10e-08 -5.24e-08 -2.12e-07 -1.20e-07 -2.62e-07 erg/cm2
90%_error_hi 3.46e-08 3.10e-08 5.24e-08 2.46e-07 1.21e-07 2.87e-07 erg/cm2
Peak flux PL 4.73e-01 3.89e-01 2.18e-01 1.80e-01 1.16e+00 1.26e+00 ph/cm2/s
90%_error_low -1.44e-01 -7.95e-02 -6.64e-02 -8.86e-02 -2.37e-01 -2.55e-01 ph/cm2/s
90%_error_hi 1.54e-01 7.92e-02 6.66e-02 1.30e-01 2.38e-01 2.56e-01 ph/cm2/s
Fluence CPL 3.03e-07 4.54e-07 5.02e-07 9.79e-07 1.57e-06 2.24e-06 erg/cm2
90%_error_low -3.90e-08 -3.27e-08 -5.27e-08 -5.29e-07 -1.37e-07 -5.51e-07 erg/cm2
90%_error_hi 3.82e-08 3.86e-08 5.35e-08 6.20e-08 1.25e-07 4.90e-07 erg/cm2
Peak flux CPL 4.73e-01 3.89e-01 2.18e-01 1.80e-01 1.16e+00 1.26e+00 ph/cm2/s
90%_error_low -1.59e-01 -7.86e-02 -6.56e-02 -9.78e-02 -2.43e-01 -3.23e-01 ph/cm2/s
90%_error_hi 1.56e-01 8.08e-02 6.86e-02 1.72e-01 2.37e-01 2.52e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 235.0014 12.8824 0.0086 41.6928 -175.8384 2.7893551 22.458 TRIG_00519380 Foreground time interval of the image: -7.308 35.637 (delta_t = 42.945 [sec]) Background time interval of the image: -239.464 -177.424 (delta_t = 62.040 [sec]) -119.464 -7.308 (delta_t = 112.156 [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 -7.308 sec. to 38.452 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.85266 ( -0.131618 0.128624 ) Norm@50keV : 3.74612E-03 ( -0.000285902 0.000282385 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 72.83 using 59 PHA bins. # Reduced chi-squared = 1.278 for 57 degrees of freedom # Null hypothesis probability = 7.709865e-02 Photon flux (15-150 keV) in 45.76 sec: 0.527156 ( -0.03705 0.037158 ) ph/cm2/s Energy fluence (15-150 keV) : 1.5764e-06 ( -1.20016e-07 1.21086e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -7.308 sec. to 38.452 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.81414 ( -0.633162 0.50068 ) Epeak [keV] : 226.294 ( -227.819 -227.829 ) Norm@50keV : 3.92683E-03 ( -0.00182712 0.00320822 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 72.81 using 59 PHA bins. # Reduced chi-squared = 1.300 for 56 degrees of freedom # Null hypothesis probability = 6.503242e-02 Photon flux (15-150 keV) in 45.76 sec: 0.526066 ( -0.039248 0.038014 ) ph/cm2/s Energy fluence (15-150 keV) : 1.571e-06 ( -1.36681e-07 1.25039e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 3.288 sec. to 4.288 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.83909 ( -0.39146 0.366896 ) Norm@50keV : 8.28486E-03 ( -0.00197214 0.00189532 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 70.04 using 59 PHA bins. # Reduced chi-squared = 1.229 for 57 degrees of freedom # Null hypothesis probability = 1.149513e-01 Photon flux (15-150 keV) in 1 sec: 1.15946 ( -0.237263 0.23775 ) ph/cm2/s Energy fluence (15-150 keV) : 7.62026e-08 ( -1.76926e-08 1.81644e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 3.288 sec. to 4.288 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.8278 ( -1.45961 1.80023 ) Epeak [keV] : 664.752 ( ) Norm@50keV : 8.40823E-03 ( ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 70.04 using 59 PHA bins. # Reduced chi-squared = 1.251 for 56 degrees of freedom # Null hypothesis probability = 9.821779e-02 Photon flux (15-150 keV) in 1 sec: 1.15966 ( -0.242934 0.23743 ) ph/cm2/s Energy fluence (15-150 keV) : 0 ( 0 0 ) 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 = -8.883938367066269E-01, IMY = 6.464168030272782E-02
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: -239.464000 -177.423600 -119.464000 -7.308000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 170.2736 -60.5507 12.9 50.1 -19.0 0.3526 0.9 4.5 Cen X-3 186.6687 -62.7966 3.9 47.3 -29.1 1.0874 2.9 1.6 GX 301-2 244.9715 -15.6364 0.3 37.3 -128.0 11.0429 36.4 0.5 Sco X-1 247.9035 22.4770 2.6 57.2 -173.9 4.0891 4.5 ------ UNKNOWN 220.0899 -21.0310 2.5 13.7 -113.7 0.7875 4.7 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -7.308000 35.636600 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 170.4776 -60.6587 7.2 50.1 -19.2 0.2774 1.6 5.2 Cen X-3 186.3170 -62.7789 4.9 47.3 -28.9 -0.3893 -2.3 9.3 GX 301-2 244.9477 -15.5207 3.9 37.3 -128.2 0.3830 3.0 7.4 Sco X-1 177.3688 -7.3766 2.6 29.7 65.2 0.5514 4.5 ------ UNKNOWN 235.0014 12.8824 0.5 41.7 -175.8 2.7891 22.5 ------ UNKNOWN 237.5339 -43.4317 2.6 37.2 -79.9 0.8639 4.4 ------ UNKNOWN 214.2763 -67.3817 2.7 50.2 -45.1 1.5608 4.3 ------ UNKNOWN 241.6313 -46.2916 3.2 41.1 -78.7 1.1087 3.5 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 117.836600 962.610900 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9706 -15.6411 0.1 30.1 3.2 54.6340 79.4 0.5 Sco X-1 254.4888 35.2964 1.3 28.5 -122.7 8.0306 9.2 3.2 Her X-1 256.0595 -37.8349 8.4 54.4 2.2 3.3680 1.4 3.5 4U 1700-377 256.5530 -36.4098 6.4 53.3 0.9 3.4134 1.8 5.7 GX 349+2 262.9196 -24.8333 9.8 46.5 -13.3 1.3106 1.2 7.2 GX 1+4 268.2701 -1.4241 4.1 35.9 -46.5 2.8160 2.8 6.1 SW J1753.5-0127 270.1953 -25.1654 16.1 51.2 -19.4 -1.0429 -0.7 7.1 GX 5-1 270.3946 -25.7172 22.6 51.7 -19.1 -0.7659 -0.5 5.2 GRS 1758-258 274.0848 -13.8263 0.0 47.0 -34.2 2.3569 1.8 13.4 GX 17+2 275.9249 -30.3671 108.5 58.4 -19.0 0.3595 0.1 0.0 H1820-303 262.8275 -33.7534 6.2 53.6 -6.2 3.0922 1.9 9.4 GX 354-0 250.5470 -31.5728 2.1 46.8 4.4 6.1882 5.5 ------ UNKNOWN 255.4572 -27.6126 2.5 45.0 -3.3 5.0088 4.6 ------ UNKNOWN 250.5416 28.1659 2.6 21.1 -116.5 3.0454 4.4 ------ UNKNOWN 251.8492 42.2852 3.3 32.8 -134.2 3.3419 3.5 ------ UNKNOWN