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: Thu Mar 17 18:58:57 EDT 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger671014
======================================================================
Trigger: 00671014 Segment: 000
BAT Trigger Time: 474865584 [s; MET]
Trigger Stop: 474865672 [s; MET]
UTC: 2016-01-19T03:06:08.282120 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 211.892936150736 Dec: 20.474466794798 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.54
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 10.54
Analysis Position: [ source = BAT ]
RA: 211.892936150736 Dec: 20.474466794798 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 211.917112951159 Dec: 20.452445729909 [deg; J2000]
{ 14h 07m 40.1s , +20d 27' 08.8" }
+/- 2.05187253955267 [arcmin] (estimated 90% radius based on SNR)
+/- 1.05454516981519 [arcmin] (formal 1-sigma fit error)
SNR: 10.8940475540844
Angular difference between the analysis and refined position is 1.895469 arcmin
Partial Coding Fraction: 0.7734375 [ including projection effects ]
Duration
T90: 120.13999992609 +/- 14.9846310363226
Measured from: 54.1240000128746
to: 174.263999938965 [s; relative to TRIGTIME]
T50: 21.227999985218 +/- 1.25781396207698
Measured from: 133.991999983788
to: 155.219999969006 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 146.055999994278
to: 147.055999994278 [s; relative to TRIGTIME]
Total Fluence
Measured from: 32.5839999914169
to: 200.227999985218 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 3.779576 4.425667 3.055510 0.728318
0.091632 0.095546 0.083876 0.072510 [error]
Peak 0.092217 0.136285 0.105415 0.022257
0.007626 0.008590 0.007440 0.005709 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 167.644 32.584 200.228
T90 120.140 54.124 174.264
T50 21.228 133.992 155.220
Peak 1.000 146.056 147.056
====== 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 -1.628 -0.056 0.056 - - - 4.42e-03 -1.24e-04 1.23e-04 48.040 57
CPL -1.625 -0.057 0.105 9999.360 -9999.360 -9999.360 4.42e-03 -1.20e-04 5.10e-04 48.090 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 -1.453 -0.119 0.118 - - - 2.25e-02 -1.60e-03 1.60e-03 62.110 57
CPL -0.999 -0.452 0.505 111.078 -34.895 4691.822 3.81e-02 -1.52e-02 2.93e-02 59.150 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 1.07e-06 1.81e-06 2.34e-06 6.12e-06 6.90e-06 1.13e-05 erg/cm2
90%_error_low -5.89e-08 -5.65e-08 -8.69e-08 -5.10e-07 -2.04e-07 -5.59e-07 erg/cm2
90%_error_hi 6.03e-08 5.63e-08 8.68e-08 5.42e-07 2.04e-07 5.85e-07 erg/cm2
Peak flux PL 8.84e-01 9.14e-01 6.68e-01 7.84e-01 2.77e+00 3.25e+00 ph/cm2/s
90%_error_low -1.02e-01 -6.75e-02 -5.96e-02 -1.33e-01 -1.94e-01 -2.32e-01 ph/cm2/s
90%_error_hi 1.06e-01 6.72e-02 5.92e-02 1.49e-01 1.94e-01 2.33e-01 ph/cm2/s
Fluence CPL 1.07e-06 1.81e-06 2.33e-06 6.34e-06 6.98e-06 1.12e-05 erg/cm2
90%_error_low -6.83e-08 -5.08e-08 -7.14e-08 -1.14e-06 -2.79e-07 -8.52e-07 erg/cm2
90%_error_hi 5.11e-08 6.20e-08 1.02e-07 1.18e-08 1.29e-07 7.71e-07 erg/cm2
Peak flux CPL 8.15e-01 9.55e-01 6.95e-01 4.74e-01 2.72e+00 2.94e+00 ph/cm2/s
90%_error_low -1.22e-01 -7.91e-02 -6.66e-02 -1.82e-01 -2.00e-01 -2.78e-01 ph/cm2/s
90%_error_hi 1.25e-01 8.10e-02 6.78e-02 3.15e-01 2.00e-01 3.56e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 211.9171 20.4524 0.0176 30.3117 -177.9633 1.3874610 10.894 TRIG_00671014 Foreground time interval of the image: 32.584 96.701 (delta_t = 64.117 [sec]) Background time interval of the image: -239.000 32.584 (delta_t = 271.584 [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 32.584 sec. to 200.228 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.62789 ( -0.0564148 0.0562322 ) Norm@50keV : 4.41652E-03 ( -0.000123623 0.000123473 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 48.04 using 59 PHA bins. # Reduced chi-squared = 0.8428 for 57 degrees of freedom # Null hypothesis probability = 7.950532e-01 Photon flux (15-150 keV) in 167.6 sec: 0.572576 ( -0.017639 0.017707 ) ph/cm2/s Energy fluence (15-150 keV) : 6.9012e-06 ( -2.03678e-07 2.04128e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 32.584 sec. to 200.228 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.6255 ( -0.0572048 0.104876 ) Epeak [keV] : 9999.36 ( -9999.36 -9999.36 ) Norm@50keV : 4.42202E-03 ( -0.000124114 0.000505835 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 48.09 using 59 PHA bins. # Reduced chi-squared = 0.8587 for 56 degrees of freedom # Null hypothesis probability = 7.649038e-01 Photon flux (15-150 keV) in 167.6 sec: 0.572492 ( -0.017642 0.017712 ) ph/cm2/s Energy fluence (15-150 keV) : 6.97516e-06 ( -2.78873e-07 1.28857e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 146.056 sec. to 147.056 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.45336 ( -0.118749 0.117684 ) Norm@50keV : 2.24557E-02 ( -0.00160199 0.00159588 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 62.11 using 59 PHA bins. # Reduced chi-squared = 1.090 for 57 degrees of freedom # Null hypothesis probability = 2.990448e-01 Photon flux (15-150 keV) in 1 sec: 2.76973 ( -0.194 0.19411 ) ph/cm2/s Energy fluence (15-150 keV) : 2.14778e-07 ( -1.69399e-08 1.70789e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 146.056 sec. to 147.056 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.999132 ( -0.451765 0.504644 ) Epeak [keV] : 111.078 ( -34.8947 4691.82 ) Norm@50keV : 3.80753E-02 ( -0.0151975 0.0292961 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 59.15 using 59 PHA bins. # Reduced chi-squared = 1.056 for 56 degrees of freedom # Null hypothesis probability = 3.612720e-01 Photon flux (15-150 keV) in 1 sec: 2.72113 ( -0.2002 0.20002 ) ph/cm2/s Energy fluence (15-150 keV) : 2.08113e-07 ( -1.83245e-08 1.83723e-08 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 120.14 sec. Hardness ratio (energy fluence ratio) = 1.2942564675
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 2.877277e-06 S(50-150 keV) = 4.02392e-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 = -5.842577038141209E-01, IMY = 2.077777516912401E-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: -239.000000 32.584000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 170.1601 -60.5728 4.2 58.4 -13.9 3.4219 2.7 5.5 Cen X-3 186.4712 -62.8332 8.7 57.7 -23.3 -1.6601 -1.3 6.3 GX 301-2 200.3227 -6.5026 2.2 4.3 -105.5 1.1987 5.3 ------ UNKNOWN 173.0090 -58.9735 2.6 56.3 -14.4 3.9629 4.5 ------ UNKNOWN 228.5665 -27.7896 2.7 38.0 -78.9 2.9652 4.3 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: 32.584000 96.700610 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 170.2543 -60.6351 7.9 58.4 -13.9 -0.7903 -1.4 1.9 Cen X-3 186.8441 -62.8221 7.6 57.7 -23.5 -0.8026 -1.5 6.0 GX 301-2 164.5144 0.1323 2.4 32.0 70.7 1.0129 4.9 ------ UNKNOWN 217.2233 30.3531 2.4 41.2 179.8 0.8372 4.8 ------ UNKNOWN 211.9171 20.4525 1.1 30.3 -178.0 1.3880 10.9 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 149.100590 963.076800 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 254.4576 35.3425 186.8 40.1 -140.5 0.0625 0.1 0.0 Her X-1 184.9403 -25.4085 3.2 52.8 11.4 6.7292 3.6 ------ UNKNOWN 222.5530 61.2440 3.5 41.5 168.2 3.1994 3.3 ------ UNKNOWN 241.6970 65.6912 3.1 49.2 176.2 5.7395 3.7 ------ UNKNOWN 211.9203 20.4739 1.3 0.0 -149.1 4.3234 8.6 ------ UNKNOWN 234.1636 26.2945 2.6 21.2 -129.7 2.6315 4.5 ------ UNKNOWN 258.2812 50.3852 3.7 47.0 -160.4 3.7112 3.1 ------ UNKNOWN 256.6353 15.5770 3.2 42.7 -110.6 9.8344 3.6 ------ UNKNOWN