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 Dec 19 15:54:49 EST 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger724438
======================================================================
Trigger: 00724438 Segment: 000
BAT Trigger Time: 502096317.088 [s; MET]
Trigger Stop: 502096317.472 [s; MET]
UTC: 2016-11-29T07:11:39.857180 [includes UTCF correction]
Where From?: (*SHORT BURST*) Expanded to TRIGTIME - 32 ms to TRIGTIME + 320 ms
BAT
RA: 316.192888589222 Dec: 32.125124540387 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.73
Image Trigger?: NO
Rate S/N Ratio: 32.4499614791759 [ if not an image trigger ]
Image S/N Ratio: 8.73
Analysis Position: [ source = BAT ]
RA: 316.192888589222 Dec: 32.125124540387 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 316.217133730944 Dec: 32.1360926393416 [deg; J2000]
{ 21h 04m 52.1s , +32d 08' 09.9" }
+/- 1.61910540410255 [arcmin] (estimated 90% radius based on SNR)
+/- 0.687520647422061 [arcmin] (formal 1-sigma fit error)
SNR: 15.2810754309283
Angular difference between the analysis and refined position is 1.396660 arcmin
Partial Coding Fraction: 0.6953125 [ including projection effects ]
Duration
T90: 35.5439999699593 +/- 2.09513345944611
Measured from: 6.18000000715256
to: 41.7239999771118 [s; relative to TRIGTIME]
T50: 15.3319999575615 +/- 2.17121626453183
Measured from: 18.0759999752045
to: 33.407999932766 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 26.6439999938011
to: 27.6439999938011 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0.0559999942779541
to: 44.5839999914169 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.526902 2.154708 1.605890 0.361065
0.049632 0.053190 0.046857 0.038761 [error]
Peak 0.084154 0.142551 0.142085 0.033188
0.008496 0.009651 0.008972 0.006951 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 44.528 0.056 44.584
T90 35.544 6.180 41.724
T50 15.332 18.076 33.408
Peak 1.000 26.644 27.644
====== 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 -1.534 -0.057 0.057 - - - 8.54e-03 -2.59e-04 2.59e-04 55.270 57
CPL -1.405 -0.161 0.224 243.360 -121.080 -243.360 9.84e-03 -1.48e-03 2.66e-03 54.210 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 -1.161 -0.115 0.117 - - - 2.83e-02 -1.91e-03 1.91e-03 44.590 57
CPL -0.849 -0.363 0.484 206.175 -92.694 -206.175 3.94e-02 -1.23e-02 2.51e-02 43.110 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 5.01e-07 9.02e-07 1.25e-06 3.58e-06 3.59e-06 6.23e-06 erg/cm2
90%_error_low -2.92e-08 -3.08e-08 -4.77e-08 -3.01e-07 -1.15e-07 -3.30e-07 erg/cm2
90%_error_hi 2.98e-08 3.07e-08 4.76e-08 3.19e-07 1.16e-07 3.45e-07 erg/cm2
Peak flux PL 8.43e-01 1.04e+00 9.28e-01 1.44e+00 3.31e+00 4.25e+00 ph/cm2/s
90%_error_low -1.10e-01 -8.49e-02 -7.05e-02 -2.19e-01 -2.31e-01 -3.00e-01 ph/cm2/s
90%_error_hi 1.15e-01 8.41e-02 7.00e-02 2.43e-01 2.32e-01 3.03e-01 ph/cm2/s
Fluence CPL 4.88e-07 9.11e-07 1.26e-06 2.96e-06 3.55e-06 5.62e-06 erg/cm2
90%_error_low -3.65e-08 -3.39e-08 -5.17e-08 -7.73e-07 -1.28e-07 -7.77e-07 erg/cm2
90%_error_hi 3.70e-08 3.42e-08 5.22e-08 5.68e-07 1.28e-07 7.37e-07 erg/cm2
Peak flux CPL 7.82e-01 1.06e+00 9.64e-01 1.05e+00 3.27e+00 3.85e+00 ph/cm2/s
90%_error_low -1.36e-01 -9.17e-02 -8.56e-02 -3.64e-01 -2.38e-01 -4.43e-01 ph/cm2/s
90%_error_hi 1.41e-01 9.31e-02 8.71e-02 4.73e-01 2.38e-01 5.57e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 316.2171 32.1361 0.0126 36.4364 -8.9684 0.7673930 15.281 TRIG_00724438 Foreground time interval of the image: 0.056 10.613 (delta_t = 10.557 [sec]) Background time interval of the image: -239.088 0.056 (delta_t = 239.144 [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 0.056 sec. to 44.584 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.53443 ( -0.056878 0.05682 ) Norm@50keV : 8.53900E-03 ( -0.000258865 0.000258748 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 55.27 using 59 PHA bins. # Reduced chi-squared = 0.9696 for 57 degrees of freedom # Null hypothesis probability = 5.403860e-01 Photon flux (15-150 keV) in 44.53 sec: 1.07621 ( -0.03547 0.03557 ) ph/cm2/s Energy fluence (15-150 keV) : 3.58825e-06 ( -1.15426e-07 1.15595e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.056 sec. to 44.584 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.40468 ( -0.160947 0.224453 ) Epeak [keV] : 243.360 ( -121.14 -243.42 ) Norm@50keV : 9.84200E-03 ( -0.00148132 0.00265728 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 54.21 using 59 PHA bins. # Reduced chi-squared = 0.9680 for 56 degrees of freedom # Null hypothesis probability = 5.429228e-01 Photon flux (15-150 keV) in 44.53 sec: 1.06678 ( -0.03853 0.03863 ) ph/cm2/s Energy fluence (15-150 keV) : 3.55437e-06 ( -1.28487e-07 1.27959e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 26.644 sec. to 27.644 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.16123 ( -0.115501 0.116792 ) Norm@50keV : 2.83130E-02 ( -0.00191169 0.00191051 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 44.59 using 59 PHA bins. # Reduced chi-squared = 0.7822 for 57 degrees of freedom # Null hypothesis probability = 8.841401e-01 Photon flux (15-150 keV) in 1 sec: 3.30640 ( -0.23125 0.23159 ) ph/cm2/s Energy fluence (15-150 keV) : 2.90516e-07 ( -2.12943e-08 2.13945e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 26.644 sec. to 27.644 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.848806 ( -0.363346 0.483693 ) Epeak [keV] : 206.175 ( -92.6935 -206.175 ) Norm@50keV : 3.94338E-02 ( -0.0122728 0.0251298 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 43.11 using 59 PHA bins. # Reduced chi-squared = 0.7698 for 56 degrees of freedom # Null hypothesis probability = 8.965691e-01 Photon flux (15-150 keV) in 1 sec: 3.26719 ( -0.23791 0.23791 ) ph/cm2/s Energy fluence (15-150 keV) : 2.86358e-07 ( -2.23847e-08 2.22875e-08 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 35.544 sec. Hardness ratio (energy fluence ratio) = 1.38086085862
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 1.4037828e-06 S(50-150 keV) = 2.1844743e-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 = 7.292190432617182E-01, IMY = 1.150843779654006E-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: -239.088000 0.056000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 299.5543 35.1804 0.6 48.1 -21.0 10.3153 20.7 2.2 Cyg X-1 308.2193 41.0195 3.6 47.4 -8.9 1.3698 3.2 6.4 Cyg X-3 326.0467 38.2532 6.1 38.7 7.2 0.6135 1.9 7.2 Cyg X-2 349.6546 -55.7102 3.3 57.4 -170.4 4.5888 3.5 ------ UNKNOWN 290.9834 38.7647 2.4 55.8 -22.3 3.9381 4.8 ------ UNKNOWN 325.0052 -56.0725 3.5 57.2 -154.1 5.2849 3.3 ------ UNKNOWN 303.5238 -33.1793 2.2 45.2 -122.3 4.5799 5.2 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: 0.056000 10.612610 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 299.4969 35.1026 5.7 48.1 -21.1 -0.1725 -2.0 7.5 Cyg X-1 308.1312 40.9908 13.3 47.4 -9.0 -0.0643 -0.9 2.5 Cyg X-3 326.2177 38.4200 3.3 38.8 7.5 0.1955 3.5 6.3 Cyg X-2 8.2549 -10.9252 2.2 34.6 129.4 0.3423 5.2 ------ UNKNOWN 335.3925 21.1559 2.3 20.6 18.9 0.1933 4.9 ------ UNKNOWN 316.2171 32.1361 0.8 36.4 -9.0 0.7674 15.3 ------ UNKNOWN 286.9449 22.2271 2.7 51.9 -42.7 0.8360 4.3 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 66.212590 613.912600 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 254.3531 35.5595 0.0 50.6 -39.5 4.5079 2.0 14.0 Her X-1 288.7553 10.9470 1.9 33.0 -95.1 5.3374 5.9 2.5 GRS 1915+105 299.5917 35.2015 0.2 14.1 -44.3 23.9460 52.6 0.1 Cyg X-1 308.1281 40.9690 1.6 11.0 -5.3 3.2062 7.1 1.3 Cyg X-3 326.2016 38.4915 4.0 10.3 77.9 1.3332 2.9 10.3 Cyg X-2 5.0864 33.9858 4.0 40.6 102.3 5.5539 2.9 ------ UNKNOWN 358.9593 14.2561 2.6 42.8 133.1 6.7323 4.5 ------ UNKNOWN