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: Tue Mar 4 10:49:02 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger586289
======================================================================
Trigger: 00586289 Segment: 000
BAT Trigger Time: 413814195.456 [s; MET]
Trigger Stop: 413814203.648 [s; MET]
UTC: 2014-02-11T12:23:03.824220 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 124.230447244537 Dec: 20.2436200277782 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.26
Image Trigger?: NO
Rate S/N Ratio: 13.228756555323 [ if not an image trigger ]
Image S/N Ratio: 10.26
Analysis Position: [ source = BAT ]
RA: 124.230447244537 Dec: 20.2436200277782 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 124.232921756996 Dec: 20.235449467908 [deg; J2000]
{ 08h 16m 55.9s , +20d 14' 07.6" }
+/- 1.39216314473229 [arcmin] (estimated 90% radius based on SNR)
+/- 0.63613875310429 [arcmin] (formal 1-sigma fit error)
SNR: 18.9603680045216
Angular difference between the analysis and refined position is 0.509641 arcmin
Partial Coding Fraction: 0.8125 [ including projection effects ]
Duration
T90: 109.531999945641 +/- 26.249381548809
Measured from: -14.2759999632835
to: 95.255999982357 [s; relative to TRIGTIME]
T50: 48.2399999499321 +/- 6.60201180093168
Measured from: 1.04800003767014
to: 49.2879999876022 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.904000043869019
to: 1.90400004386902 [s; relative to TRIGTIME]
Total Fluence
Measured from: -19.2399999499321
to: 121.808000028133 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.482067 1.372972 0.657660 0.117068
0.082786 0.084315 0.073460 0.066047 [error]
Peak 0.044365 0.028315 0.015222 0.005832
0.007202 0.007511 0.006426 0.005673 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 141.048 -19.240 121.808
T90 109.532 -14.276 95.256
T50 48.240 1.048 49.288
Peak 1.000 0.904 1.904
====== 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 -2.071 -0.145 0.140 - - - 1.44e-03 -1.33e-04 1.30e-04 48.030 57
CPL -1.676 -0.553 0.634 34.217 -28.549 -34.217 2.43e-03 -1.18e-03 3.15e-03 46.580 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 -2.321 -0.503 0.420 - - - 4.26e-03 -1.54e-03 1.54e-03 51.970 57
CPL -0.851 -1.106 3.727 26.977 N/A N/A 3.86e-02 N/A N/A 50.140 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 4.45e-07 5.78e-07 5.51e-07 9.30e-07 1.88e-06 2.50e-06 erg/cm2
90%_error_low -4.59e-08 -4.10e-08 -6.98e-08 -2.16e-07 -1.57e-07 -2.96e-07 erg/cm2
90%_error_hi 4.70e-08 4.10e-08 7.11e-08 2.58e-07 1.60e-07 3.28e-07 erg/cm2
Peak flux PL 3.88e-01 2.42e-01 9.67e-02 5.22e-02 7.54e-01 7.79e-01 ph/cm2/s
90%_error_low -1.05e-01 -6.17e-02 -4.25e-02 -3.27e-02 -1.73e-01 -1.83e-01 ph/cm2/s
90%_error_hi 1.08e-01 6.00e-02 4.80e-02 5.64e-02 1.73e-01 1.85e-01 ph/cm2/s
Fluence CPL 4.28e-07 6.04e-07 5.39e-07 4.58e-07 1.80e-06 2.03e-06 erg/cm2
90%_error_low -5.24e-08 -5.35e-08 -7.96e-08 -2.75e-07 -1.87e-07 -3.46e-07 erg/cm2
90%_error_hi 5.18e-08 5.50e-08 7.65e-08 7.51e-07 1.94e-07 7.85e-07 erg/cm2
Peak flux CPL 3.74e-01 2.84e-01 7.62e-02 6.03e-03 7.39e-01 7.40e-01 ph/cm2/s
90%_error_low -1.14e-01 -4.45e-02 -6.35e-02 N/A -1.69e-01 N/A ph/cm2/s
90%_error_hi 1.14e-01 8.48e-02 6.00e-02 N/A 1.71e-01 N/A ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 124.2329 20.2354 0.0101 24.7213 20.0118 3.7022089 18.960 TRIG_00586289 Foreground time interval of the image: -19.240 121.808 (delta_t = 141.048 [sec]) Background time interval of the image: -439.255 -423.944 (delta_t = 15.311 [sec]) -239.456 -19.240 (delta_t = 220.216 [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 -19.240 sec. to 121.808 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -2.07054 ( -0.145355 0.140061 ) Norm@50keV : 1.44182E-03 ( -0.000132607 0.000130401 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 48.03 using 59 PHA bins. # Reduced chi-squared = 0.8426 for 57 degrees of freedom # Null hypothesis probability = 7.954841e-01 Photon flux (15-150 keV) in 141 sec: 0.223612 ( -0.015925 0.015937 ) ph/cm2/s Energy fluence (15-150 keV) : 1.88417e-06 ( -1.57023e-07 1.59635e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -19.240 sec. to 121.808 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.67631 ( -0.552586 0.633827 ) Epeak [keV] : 34.2172 ( -28.549 -34.2173 ) Norm@50keV : 2.42712E-03 ( -0.00118167 0.00314622 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 46.58 using 59 PHA bins. # Reduced chi-squared = 0.8318 for 56 degrees of freedom # Null hypothesis probability = 8.110583e-01 Photon flux (15-150 keV) in 141 sec: 0.219201 ( -0.017047 0.017053 ) ph/cm2/s Energy fluence (15-150 keV) : 1.8029e-06 ( -1.86942e-07 1.94016e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 0.904 sec. to 1.904 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -2.3211 ( -0.503322 0.420349 ) Norm@50keV : 4.26110E-03 ( -0.00154219 0.00153709 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 51.97 using 59 PHA bins. # Reduced chi-squared = 0.9118 for 57 degrees of freedom # Null hypothesis probability = 6.636302e-01 Photon flux (15-150 keV) in 1 sec: 0.753583 ( -0.173075 0.173386 ) ph/cm2/s Energy fluence (15-150 keV) : 4.08893e-08 ( -1.18042e-08 1.27657e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.904 sec. to 1.904 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.850757 ( -1.11012 3.72378 ) Epeak [keV] : 26.9773 ( ) Norm@50keV : 3.85832E-02 ( ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 50.14 using 59 PHA bins. # Reduced chi-squared = 0.8954 for 56 degrees of freedom # Null hypothesis probability = 6.951274e-01 Photon flux (15-150 keV) in 1 sec: 0.738992 ( -0.168729 0.170893 ) ph/cm2/s Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 109.532 sec. Hardness ratio (energy fluence ratio) = 0.952313559132
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 1.0233161e-06 S(50-150 keV) = 8.608721e-07
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 = 4.326020253788569E-01, IMY = -1.575552783659648E-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: -439.255400 -423.944400 -239.456000 -19.240000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 83.6136 22.0169 0.9 51.4 -27.0 6.4418 12.7 1.1 Crab 135.5305 -40.5557 0.9 37.0 -157.9 3.5211 13.4 0.1 Vela X-1 97.1589 -34.8762 3.1 42.6 -109.9 2.9837 3.7 ------ UNKNOWN 83.8420 -3.4463 2.4 44.9 -60.3 4.1175 4.8 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -19.240000 121.808000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 83.6279 22.0512 5.4 51.4 -26.9 1.0678 2.1 2.2 Crab 135.4021 -40.5711 4.1 37.0 -157.8 0.6885 2.8 5.8 Vela X-1 124.2329 20.2355 0.6 24.7 20.0 3.7021 19.0 ------ UNKNOWN 85.6352 -7.3368 2.7 43.1 -65.9 3.1271 4.3 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 605.744590 826.444600 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 245.0061 -15.6515 0.7 28.0 85.7 7.4330 16.8 1.7 Sco X-1 254.5389 35.4263 16.6 52.8 162.7 -0.8717 -0.7 6.4 Her X-1 256.0399 -37.7042 7.9 28.5 33.4 -0.4788 -1.5 8.8 4U 1700-377 256.5681 -36.5847 6.2 27.4 34.2 0.5927 1.9 11.6 GX 349+2 263.0388 -24.7369 1.7 14.8 45.0 1.7910 6.8 1.7 GX 1+4 264.9253 -44.5202 6.9 31.4 15.1 0.5092 1.7 8.9 4U 1735-44 268.4366 -1.5160 4.6 13.7 158.5 0.6248 2.5 5.6 SW J1753.5-0127 270.3180 -24.9290 5.5 11.4 19.8 0.5978 2.1 9.2 GX 5-1 270.3868 -25.6964 3.0 12.1 18.3 1.0852 3.8 5.3 GRS 1758-258 274.0428 -13.9290 2.8 0.2 -163.0 1.1019 4.2 6.8 GX 17+2 275.9527 -30.3822 3.5 16.4 -3.4 0.9074 3.3 1.7 H1820-303 284.8767 -24.9542 46.1 14.9 -39.0 0.0638 0.2 8.9 HT1900.1-2455 288.7793 10.9524 1.0 29.0 -146.3 3.1691 11.4 1.2 GRS 1915+105 299.6181 35.0962 7.2 54.8 -151.8 2.1818 1.6 6.5 Cyg X-1 263.0131 -33.7927 4.0 22.1 27.5 0.8264 2.9 2.8 GX 354-0 266.1372 -28.7580 1.6 16.4 27.8 1.7788 7.1 ------ UNKNOWN 267.1112 7.7646 2.5 22.9 164.8 1.1818 4.6 ------ UNKNOWN 266.9363 40.0509 2.9 54.5 176.0 4.4482 3.9 ------ UNKNOWN 274.1951 -0.1502 3.1 13.9 -176.6 0.9391 3.8 ------ UNKNOWN 281.8305 -58.6647 3.0 45.0 -3.1 1.7526 3.8 ------ UNKNOWN 290.8883 -2.5085 2.8 20.3 -120.6 1.1106 4.1 ------ UNKNOWN UNKNOWN