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: Wed Jan 22 18:19:56 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger191512
======================================================================
Trigger: 00191512 Segment: 000
BAT Trigger Time: 162082086.144 [s; MET]
Trigger Stop: 162082094.336 [s; MET]
UTC: 2006-02-19T22:48:05.118160 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 241.806599596401 Dec: 32.3303789915981 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.2
Image Trigger?: NO
Rate S/N Ratio: 8.24621125123532 [ if not an image trigger ]
Image S/N Ratio: 7.2
Analysis Position: [ source = BAT ]
RA: 241.806599596401 Dec: 32.3303789915981 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 241.856308172933 Dec: 32.3078305910385 [deg; J2000]
{ 16h 07m 25.5s , +32d 18' 28.2" }
+/- 2.18678724966408 [arcmin] (estimated 90% radius based on SNR)
+/- 0.937476985655385 [arcmin] (formal 1-sigma fit error)
SNR: 9.94673335124456
Angular difference between the analysis and refined position is 2.860619 arcmin
Partial Coding Fraction: 0.6796875 [ including projection effects ]
Duration
T90: 62.0439999997616 +/- 6.24681712150771
Measured from: -55.0879999995232
to: 6.95600000023842 [s; relative to TRIGTIME]
T50: 43.9560000002384 +/- 22.9842952657015
Measured from: -40.6759999990463
to: 3.28000000119209 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 4.06000000238419
to: 5.06000000238419 [s; relative to TRIGTIME]
Total Fluence
Measured from: -57.0679999887943
to: 8.24000000953674 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.414854 0.413649 0.071703 -0.003578
0.054226 0.048393 0.040634 0.034142 [error]
Peak 0.031008 0.023438 0.005254 0.004351
0.006982 0.006262 0.005036 0.004174 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 65.308 -57.068 8.240
T90 62.044 -55.088 6.956
T50 43.956 -40.676 3.280
Peak 1.000 4.060 5.060
====== 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 -2.529 -0.342 0.302 - - - 6.69e-04 -1.63e-04 1.61e-04 64.300 57
CPL -0.971 -1.033 1.959 24.120 N/A N/A 6.23e-03 N/A N/A 60.970 56
=== 1-s peak 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 -2.857 -1.071 0.709 - - - 2.19e-03 -1.39e-03 1.44e-03 49.120 57
CPL -1.910 N/A N/A 3.339 N/A N/A 8.78e-03 N/A N/A 49.450 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 1.48e-07 1.46e-07 1.02e-07 1.11e-07 4.40e-07 5.07e-07 erg/cm2
90%_error_low -2.73e-08 -2.48e-08 -3.19e-08 -5.45e-08 -7.80e-08 -1.08e-07 erg/cm2
90%_error_hi 2.79e-08 2.42e-08 3.50e-08 8.28e-08 8.12e-08 1.28e-07 erg/cm2
Peak flux PL 3.38e-01 1.55e-01 4.27e-02 1.47e-02 5.44e-01 5.50e-01 ph/cm2/s
90%_error_low -1.21e-01 -6.66e-02 -3.07e-02 -1.47e-02 -1.63e-01 -1.66e-01 ph/cm2/s
90%_error_hi 1.24e-01 5.79e-02 4.08e-02 3.54e-02 1.63e-01 1.67e-01 ph/cm2/s
Fluence CPL 1.36e-07 1.57e-07 9.62e-08 1.13e-07 4.36e-07 5.04e-07 erg/cm2
90%_error_low -3.19e-08 -2.46e-08 -2.64e-08 -5.85e-08 -7.59e-08 -1.00e-07 erg/cm2
90%_error_hi 3.12e-08 1.42e-08 4.04e-08 1.12e-07 8.67e-08 1.51e-07 erg/cm2
Peak flux CPL 3.37e-01 1.39e-01 3.55e-02 1.31e-02 5.18e-01 5.52e-01 ph/cm2/s
90%_error_low -1.23e-01 -9.92e-02 -3.55e-02 -1.31e-02 -2.23e-01 -2.58e-01 ph/cm2/s
90%_error_hi 1.25e-01 7.27e-02 4.78e-02 4.33e-02 1.88e-01 1.68e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 241.8563 32.3078 0.0193 32.5885 167.5201 1.0165707 9.947 TRIG_00191512 Foreground time interval of the image: -57.068 8.240 (delta_t = 65.308 [sec]) Background time interval of the image: -299.144 -57.068 (delta_t = 242.076 [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 -57.068 sec. to 8.240 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -2.52916 ( -0.342262 0.302367 ) Norm@50keV : 6.68679E-04 ( -0.000162841 0.000161379 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 64.30 using 59 PHA bins. # Reduced chi-squared = 1.128 for 57 degrees of freedom # Null hypothesis probability = 2.361666e-01 Photon flux (15-150 keV) in 65.31 sec: 0.133760 ( -0.019923 0.019926 ) ph/cm2/s Energy fluence (15-150 keV) : 4.40311e-07 ( -7.8035e-08 8.11594e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -57.068 sec. to 8.240 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.971485 ( -1.03341 1.95914 ) Epeak [keV] : 24.1197 ( ) Norm@50keV : 6.22704E-03 ( ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 60.97 using 59 PHA bins. # Reduced chi-squared = 1.089 for 56 degrees of freedom # Null hypothesis probability = 3.018696e-01 Photon flux (15-150 keV) in 65.31 sec: 0.128331 ( -0.020277 0.020381 ) ph/cm2/s Energy fluence (15-150 keV) : 4.36495e-07 ( -7.59255e-08 8.6731e-08 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 4.060 sec. to 5.060 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -2.85688 ( -1.07122 0.709216 ) Norm@50keV : 2.18960E-03 ( -0.00138491 0.00143663 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 49.12 using 59 PHA bins. # Reduced chi-squared = 0.8618 for 57 degrees of freedom # Null hypothesis probability = 7.616864e-01 Photon flux (15-150 keV) in 1 sec: 0.543852 ( -0.162858 0.163035 ) ph/cm2/s Energy fluence (15-150 keV) : 2.47281e-08 ( -9.28552e-09 1.03051e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 4.060 sec. to 5.060 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.91013 ( ) Epeak [keV] : 3.33894 ( ) Norm@50keV : 8.78447E-03 ( ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 49.45 using 59 PHA bins. # Reduced chi-squared = 0.8831 for 56 degrees of freedom # Null hypothesis probability = 7.192669e-01 Photon flux (15-150 keV) in 1 sec: 0.518391 ( -0.222541 0.188363 ) ph/cm2/s Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 62.044 sec. Hardness ratio (energy fluence ratio) = 0.693010332433
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 2.945718e-07 S(50-150 keV) = 1.4575195e-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 = -6.241397423938010E-01, IMY = -1.381387024942553E-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: -299.144000 -57.068000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9751 -15.6350 0.2 16.5 -36.8 13.9818 61.4 0.4 Sco X-1 254.5137 35.4047 3.4 38.4 -176.4 1.0940 3.4 4.6 Her X-1 255.8446 -37.9752 5.8 40.8 -37.0 0.7825 2.0 10.3 4U 1700-377 256.3724 -36.4235 4.4 39.6 -38.7 1.0194 2.6 3.0 GX 349+2 262.8904 -24.6000 0.0 33.5 -58.2 0.7455 2.1 10.9 GX 1+4 264.5043 -44.5969 9.3 49.8 -40.3 1.0481 1.2 13.5 4U 1735-44 268.3672 -1.4161 6.2 29.2 -104.1 0.6665 1.8 2.2 SW J1753.5-0127 270.3189 -25.2046 7.8 39.1 -64.6 0.8042 1.5 7.8 GX 5-1 270.4300 -25.8724 0.0 39.6 -63.8 -0.5090 -0.9 10.4 GRS 1758-258 273.9190 -14.1428 11.2 37.1 -83.1 0.5519 1.0 8.1 GX 17+2 263.1412 -33.8839 5.9 40.5 -48.0 0.8392 1.9 8.1 GX 354-0 208.2455 8.1595 2.2 31.9 89.2 2.3956 5.4 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -57.068000 8.240000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.7966 -15.7159 6.7 16.5 -36.2 -0.1452 -1.7 11.5 Sco X-1 254.4102 35.1962 7.4 38.1 -176.3 0.1805 1.6 9.1 Her X-1 255.8769 -37.7005 0.0 40.6 -37.2 -0.1634 -1.2 10.1 4U 1700-377 256.2913 -36.3596 35.6 39.5 -38.6 -0.0421 -0.3 7.9 GX 349+2 263.0592 -24.8822 77.3 33.8 -58.0 0.0197 0.1 8.6 GX 1+4 264.8687 -44.3945 4.9 49.8 -40.7 -0.8388 -2.3 6.3 4U 1735-44 268.2145 -1.5412 3.9 29.1 -103.9 -0.3650 -3.0 10.6 SW J1753.5-0127 270.2534 -24.9539 6.5 39.0 -64.9 0.3713 1.8 7.7 GX 5-1 270.4120 -25.8715 63.6 39.6 -63.8 0.0409 0.2 9.7 GRS 1758-258 273.9853 -14.1449 7.3 37.2 -83.1 0.3324 1.6 6.6 GX 17+2 262.8946 -33.7630 3.9 40.3 -47.9 -0.5029 -3.0 6.4 GX 354-0 255.1045 55.0886 1.8 56.8 174.1 2.8705 6.2 ------ UNKNOWN 241.8563 32.3078 1.2 32.6 167.5 1.0166 9.9 ------ UNKNOWN 233.8601 -7.8402 2.2 9.3 17.7 0.4048 5.3 ------ UNKNOWN 236.0320 -44.0093 2.0 43.9 -13.5 0.7527 5.8 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 104.156600 302.928500 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9747 -15.6360 0.5 48.0 -12.7 8.5310 21.8 0.4 Sco X-1 254.5513 35.4743 4.6 11.0 -118.8 0.4162 2.5 9.1 Her X-1 268.4534 -1.5935 0.0 42.2 -50.4 0.8154 2.1 9.9 SW J1753.5-0127 329.4647 68.2534 2.6 59.4 -163.1 4.9009 4.4 ------ UNKNOWN