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 Oct 13 20:10:13 EDT 2014
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger613160
======================================================================
Trigger: 00613160 Segment: 000
BAT Trigger Time: 432832528.064 [s; MET]
Trigger Stop: 432832532.16 [s; MET]
UTC: 2014-09-19T15:15:15.516440 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 221.555860331452 Dec: -32.1541282696393 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.04
Image Trigger?: NO
Rate S/N Ratio: 20.4694894904587 [ if not an image trigger ]
Image S/N Ratio: 7.04
Analysis Position: [ source = BAT ]
RA: 221.555860331452 Dec: -32.1541282696393 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 221.541182262144 Dec: -32.1539395605299 [deg; J2000]
{ 14h 46m 09.9s , -32d 09' 14.2" }
+/- 1.48950594371843 [arcmin] (estimated 90% radius based on SNR)
+/- 0.63356051943859 [arcmin] (formal 1-sigma fit error)
SNR: 17.2153231458842
Angular difference between the analysis and refined position is 0.745691 arcmin
Partial Coding Fraction: 0.1425781 [ including projection effects ]
Duration
T90: 152.304000020027 +/- 21.2798390673805
Measured from: 3.06400001049042
to: 155.368000030518 [s; relative to TRIGTIME]
T50: 67.6640000343323 +/- 10.0444961564706
Measured from: 24.472000002861
to: 92.1360000371933 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 38.972000002861
to: 39.972000002861 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.744000017642975
to: 172.32800000906 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 2.800911 3.869868 2.795734 0.493909
0.255922 0.220336 0.189563 0.175312 [error]
Peak 0.068396 0.115877 0.042527 0.032550
0.020794 0.019015 0.015401 0.014615 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 173.072 -0.744 172.328
T90 152.304 3.064 155.368
T50 67.664 24.472 92.136
Peak 1.000 38.972 39.972
====== 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 -1.680 -0.121 0.120 - - - 3.85e-03 -2.63e-04 2.62e-04 54.330 57
CPL -1.252 -0.448 0.510 86.233 -24.087 -86.233 6.34e-03 -2.54e-03 4.97e-03 51.740 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 -1.978 -0.427 0.394 - - - 1.33e-02 -3.69e-03 3.59e-03 69.630 57
CPL 0.657 -2.589 6.480 40.124 N/A N/A 4.67e-01 N/A N/A 66.670 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 1.01e-06 1.66e-06 2.07e-06 5.14e-06 6.19e-06 9.88e-06 erg/cm2
90%_error_low -1.15e-07 -1.15e-07 -1.86e-07 -9.29e-07 -4.42e-07 -1.08e-06 erg/cm2
90%_error_hi 1.19e-07 1.15e-07 1.86e-07 1.06e-06 4.44e-07 1.19e-06 erg/cm2
Peak flux PL 8.69e-01 6.60e-01 3.35e-01 2.44e-01 1.98e+00 2.11e+00 ph/cm2/s
90%_error_low -2.93e-01 -1.59e-01 -1.15e-01 -1.30e-01 -4.84e-01 -5.06e-01 ph/cm2/s
90%_error_hi 3.17e-01 1.59e-01 1.17e-01 1.93e-01 4.86e-01 5.06e-01 ph/cm2/s
Fluence CPL 9.36e-07 1.73e-06 2.11e-06 2.77e-06 5.97e-06 7.55e-06 erg/cm2
90%_error_low -1.38e-07 -1.35e-07 -1.99e-07 -1.26e-06 -4.97e-07 -1.36e-06 erg/cm2
90%_error_hi 1.41e-07 1.38e-07 2.02e-07 2.58e-06 4.98e-07 2.59e-06 erg/cm2
Peak flux CPL 6.43e-01 8.76e-01 2.66e-01 9.26e-03 1.79e+00 1.80e+00 ph/cm2/s
90%_error_low -6.43e-01 -2.71e-01 -2.66e-01 -9.26e-03 -5.10e-01 -5.12e-01 ph/cm2/s
90%_error_hi 3.96e-01 2.71e-01 1.87e-01 2.21e-01 5.30e-01 5.37e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 221.5412 -32.1539 0.0111 37.9695 -97.4762 10.3427010 17.215 TRIG_00613160 Foreground time interval of the image: -0.744 172.328 (delta_t = 173.072 [sec]) Background time interval of the image: -239.064 -0.744 (delta_t = 238.320 [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 -0.744 sec. to 172.328 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.68028 ( -0.121233 0.120246 ) Norm@50keV : 3.85298E-03 ( -0.000263306 0.000262214 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 54.33 using 59 PHA bins. # Reduced chi-squared = 0.9531 for 57 degrees of freedom # Null hypothesis probability = 5.760370e-01 Photon flux (15-150 keV) in 173.1 sec: 0.508265 ( -0.035403 0.035528 ) ph/cm2/s Energy fluence (15-150 keV) : 6.18625e-06 ( -4.41684e-07 4.44417e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.744 sec. to 172.328 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.25169 ( -0.448127 0.509858 ) Epeak [keV] : 86.2332 ( -24.0875 -86.2332 ) Norm@50keV : 6.34368E-03 ( -0.00254416 0.00496884 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 51.74 using 59 PHA bins. # Reduced chi-squared = 0.9240 for 56 degrees of freedom # Null hypothesis probability = 6.365884e-01 Photon flux (15-150 keV) in 173.1 sec: 0.495435 ( -0.037832 0.037919 ) ph/cm2/s Energy fluence (15-150 keV) : 5.97238e-06 ( -4.96842e-07 4.97808e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 38.972 sec. to 39.972 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.97825 ( -0.427447 0.393283 ) Norm@50keV : 1.33106E-02 ( -0.00369396 0.00358678 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 69.63 using 59 PHA bins. # Reduced chi-squared = 1.222 for 57 degrees of freedom # Null hypothesis probability = 1.216185e-01 Photon flux (15-150 keV) in 1 sec: 1.97696 ( -0.4843 0.48629 ) ph/cm2/s Energy fluence (15-150 keV) : 1.22651e-07 ( -3.20652e-08 3.28095e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 38.972 sec. to 39.972 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: 0.656617 ( -2.62956 6.43949 ) Epeak [keV] : 40.1240 ( ) Norm@50keV : 0.467015 ( ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 66.66 using 59 PHA bins. # Reduced chi-squared = 1.190 for 56 degrees of freedom # Null hypothesis probability = 1.557587e-01 Photon flux (15-150 keV) in 1 sec: 1.79371 ( -0.50953 0.53014 ) ph/cm2/s Energy fluence (15-150 keV) : 9.83717e-08 ( -2.864e-08 4.04796e-08 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 152.304 sec. Hardness ratio (energy fluence ratio) = 1.24813005193
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 2.669726e-06 S(50-150 keV) = 3.516423e-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 = -1.015444798698714E-01, IMY = 7.737949248350040E-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: -239.064000 -0.744000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9948 -15.6243 0.2 24.4 -50.5 16.4717 53.2 1.3 Sco X-1 256.0506 -37.8094 1.7 11.2 -127.2 1.6279 6.8 3.7 4U 1700-377 256.3597 -36.4694 3.3 10.3 -122.1 0.8487 3.5 4.6 GX 349+2 262.8588 -24.8871 13.5 6.2 -22.3 0.2228 0.9 11.8 GX 1+4 264.9477 -44.4669 6.2 14.2 -169.1 0.4411 1.9 8.8 4U 1735-44 268.2934 -1.3906 7.0 29.0 11.4 0.4940 1.7 5.8 SW J1753.5-0127 270.3688 -25.0722 2.5 6.4 42.9 1.1201 4.5 4.6 GX 5-1 270.3777 -25.7220 5.1 5.9 46.5 0.5758 2.4 4.3 GRS 1758-258 273.9153 -14.1997 23.3 17.6 32.5 0.1330 0.5 11.1 GX 17+2 275.9854 -30.5076 10.3 8.4 100.7 0.2883 1.1 9.0 H1820-303 285.0852 -24.9725 9.6 17.5 83.9 0.3661 1.2 4.1 HT1900.1-2455 288.8662 10.9042 6.1 46.6 38.5 2.1239 1.9 4.7 GRS 1915+105 262.8867 -33.8677 6.3 4.5 -134.9 0.4809 1.8 5.5 GX 354-0 301.0839 -42.4333 2.5 30.3 130.4 1.7590 4.6 ------ UNKNOWN 267.5519 19.3711 3.0 49.7 8.8 2.5935 3.8 ------ UNKNOWN 320.1202 -79.9642 2.9 54.1 177.1 3.8891 3.9 ------ UNKNOWN 266.5968 -32.2274 1.9 1.9 177.7 1.7287 6.1 ------ UNKNOWN 243.2829 -41.2127 2.7 21.5 -119.6 1.1266 4.2 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -0.744000 172.328000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 245.0005 -15.6336 2.5 24.4 -50.5 1.1336 4.6 1.3 Sco X-1 256.1687 -37.6937 0.0 11.1 -127.0 -0.1967 -1.0 12.5 4U 1700-377 256.5214 -36.3409 6.1 10.1 -121.9 -0.3547 -1.9 6.4 GX 349+2 263.1856 -24.8523 10.0 6.1 -19.7 -0.2241 -1.2 11.6 GX 1+4 264.5475 -44.5123 8.0 14.2 -168.0 0.2891 1.4 9.2 4U 1735-44 268.2247 -1.3942 5.2 29.0 11.2 -0.5260 -2.2 9.3 SW J1753.5-0127 270.4581 -25.1163 10.4 6.4 43.7 -0.2142 -1.1 9.7 GX 5-1 270.1594 -25.8547 4.2 5.7 45.7 -0.5151 -2.7 10.2 GRS 1758-258 273.8651 -13.9078 7.3 17.9 32.0 -0.3486 -1.6 11.3 GX 17+2 276.0188 -30.1978 5.5 8.5 98.6 0.4312 2.1 11.3 H1820-303 285.0080 -25.0667 41.6 17.4 84.1 -0.0620 -0.3 8.9 HT1900.1-2455 288.8491 10.9229 6.5 46.7 38.4 1.3447 1.8 3.3 GRS 1915+105 262.8186 -33.9281 9.6 4.6 -134.9 0.2463 1.2 10.2 GX 354-0 294.1361 -56.3558 2.1 32.5 158.3 1.3365 5.5 ------ UNKNOWN 209.5123 -66.9184 2.2 49.4 -147.3 2.8580 5.1 ------ UNKNOWN 221.5412 -32.1540 0.7 38.0 -97.5 10.3433 17.2 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 647.036610 835.467500 840.936000 900.636000 900.936000 962.973300 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 83.6343 22.0148 0.6 49.0 2.9 11.7283 20.7 0.1 Crab 310.6046 54.8443 2.6 45.7 165.9 2.1450 4.4 ------ UNKNOWN 70.5011 37.9648 2.8 31.1 15.3 1.2530 4.2 ------ UNKNOWN 95.5871 48.4961 2.3 27.5 -27.7 1.1511 5.1 ------ UNKNOWN 120.2231 72.9513 2.7 20.6 -95.3 1.1202 4.2 ------ UNKNOWN 246.0227 60.5716 2.2 51.1 -149.3 3.8368 5.2 ------ UNKNOWN 168.5117 65.1631 3.4 38.4 -104.5 2.3510 3.4 ------ UNKNOWN 212.8192 62.7350 3.6 48.0 -129.0 4.0298 3.2 ------ UNKNOWN