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: Sun Aug 30 18:17:40 EDT 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger650530
======================================================================
Trigger: 00650530 Segment: 000
BAT Trigger Time: 459716537.344 [s; MET]
Trigger Stop: 459716538.368 [s; MET]
UTC: 2015-07-27T19:02:02.432140 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 203.990397249456 Dec: -18.354840842608 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.59
Image Trigger?: NO
Rate S/N Ratio: 14.8996644257513 [ if not an image trigger ]
Image S/N Ratio: 7.59
Analysis Position: [ source = BAT ]
RA: 203.990397249456 Dec: -18.354840842608 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 203.966310961544 Dec: -18.3208239248367 [deg; J2000]
{ 13h 35m 51.9s , -18d 19' 15.0" }
+/- 0.979770221175017 [arcmin] (estimated 90% radius based on SNR)
+/- 0.308361758198623 [arcmin] (formal 1-sigma fit error)
SNR: 31.318290164578
Angular difference between the analysis and refined position is 2.459176 arcmin
Partial Coding Fraction: 0.6875 [ including projection effects ]
Duration
T90: 87.9559999704361 +/- 10.9851456403465
Measured from: -4.51999998092651
to: 83.4359999895096 [s; relative to TRIGTIME]
T50: 30.3159999251366 +/- 3.71548979418876
Measured from: 5.44800001382828
to: 35.7639999389648 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 9.21200001239777
to: 10.2120000123978 [s; relative to TRIGTIME]
Total Fluence
Measured from: -8.69599997997284
to: 95.944000005722 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.015512 1.787152 1.820639 0.450057
0.064295 0.066500 0.062745 0.062563 [error]
Peak 0.026356 0.044616 0.054481 0.020034
0.007161 0.007554 0.007220 0.006885 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 104.640 -8.696 95.944
T90 87.956 -4.520 83.436
T50 30.316 5.448 35.764
Peak 1.000 9.212 10.212
====== 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: 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 -1.132 -0.075 0.075 - - - 3.34e-03 -1.34e-04 1.34e-04 71.040 57
CPL -0.777 -0.296 0.318 194.566 -65.653 572.498 4.80e-03 -1.23e-03 1.78e-03 66.790 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 -0.983 -0.309 0.326 - - - 9.00e-03 -1.53e-03 1.52e-03 54.720 57
CPL -0.989 -0.299 0.405 9999.330 -9999.330 -9999.330 9.06e-03 -1.51e-03 1.63e-02 54.720 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 3.16e-07 7.28e-07 1.33e-06 5.78e-06 3.61e-06 8.15e-06 erg/cm2
90%_error_low -2.60e-08 -3.52e-08 -6.25e-08 -6.15e-07 -1.60e-07 -6.49e-07 erg/cm2
90%_error_hi 2.68e-08 3.50e-08 6.23e-08 6.67e-07 1.60e-07 6.95e-07 erg/cm2
Peak flux PL 2.26e-01 3.10e-01 3.14e-01 5.77e-01 1.04e+00 1.43e+00 ph/cm2/s
90%_error_low -7.81e-02 -6.92e-02 -5.71e-02 -2.06e-01 -1.78e-01 -2.56e-01 ph/cm2/s
90%_error_hi 8.93e-02 6.70e-02 5.60e-02 2.76e-01 1.79e-01 2.74e-01 ph/cm2/s
Fluence CPL 2.89e-07 7.43e-07 1.37e-06 3.62e-06 3.53e-06 6.02e-06 erg/cm2
90%_error_low -3.35e-08 -3.80e-08 -7.18e-08 -1.10e-06 -1.76e-07 -1.10e-06 erg/cm2
90%_error_hi 3.43e-08 3.83e-08 7.27e-08 1.70e-06 1.76e-07 1.69e-06 erg/cm2
Peak flux CPL 2.31e-01 3.11e-01 3.13e-01 5.98e-01 1.04e+00 1.43e+00 ph/cm2/s
90%_error_low -1.02e-01 -7.00e-02 -5.60e-02 N/A -1.90e-01 -4.21e-01 ph/cm2/s
90%_error_hi 8.43e-02 6.74e-02 6.75e-02 N/A 1.80e-01 2.50e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 203.9663 -18.3208 0.0061 25.2125 -122.2900 2.8083513 31.318 TRIG_00650530 Foreground time interval of the image: -8.696 19.157 (delta_t = 27.853 [sec]) Background time interval of the image: -105.843 -8.696 (delta_t = 97.147 [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 -8.696 sec. to 95.944 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.132 ( -0.0746462 0.0751098 ) Norm@50keV : 3.33701E-03 ( -0.000133808 0.000133767 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 71.04 using 59 PHA bins. # Reduced chi-squared = 1.246 for 57 degrees of freedom # Null hypothesis probability = 9.993074e-02 Photon flux (15-150 keV) in 104.6 sec: 0.388362 ( -0.016179 0.016206 ) ph/cm2/s Energy fluence (15-150 keV) : 3.61337e-06 ( -1.59768e-07 1.6046e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -8.696 sec. to 95.944 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.777189 ( -0.295612 0.317992 ) Epeak [keV] : 194.566 ( -65.6532 572.498 ) Norm@50keV : 4.80441E-03 ( -0.00122957 0.00177958 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 66.79 using 59 PHA bins. # Reduced chi-squared = 1.193 for 56 degrees of freedom # Null hypothesis probability = 1.532620e-01 Photon flux (15-150 keV) in 104.6 sec: 0.380030 ( -0.017536 0.017542 ) ph/cm2/s Energy fluence (15-150 keV) : 3.52802e-06 ( -1.76426e-07 1.75814e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 9.212 sec. to 10.212 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.982843 ( -0.308872 0.326153 ) Norm@50keV : 9.00130E-03 ( -0.00153147 0.00151558 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 54.72 using 59 PHA bins. # Reduced chi-squared = 0.9599 for 57 degrees of freedom # Null hypothesis probability = 5.612463e-01 Photon flux (15-150 keV) in 1 sec: 1.03544 ( -0.178234 0.17938 ) ph/cm2/s Energy fluence (15-150 keV) : 9.79445e-08 ( -1.76843e-08 1.78426e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 9.212 sec. to 10.212 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.988659 ( -0.303541 0.400576 ) Epeak [keV] : 9999.33 ( -9999.36 -9999.36 ) Norm@50keV : 9.05823E-03 ( -0.00150607 0.0162976 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 54.72 using 59 PHA bins. # Reduced chi-squared = 0.9772 for 56 degrees of freedom # Null hypothesis probability = 5.232697e-01 Photon flux (15-150 keV) in 1 sec: 1.03863 ( -0.189786 0.18045 ) ph/cm2/s Energy fluence (15-150 keV) : 9.79084e-08 ( 0 0 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = N/A sec. Hardness ratio (energy fluence ratio) = N/A
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = N/A S(50-150 keV) = N/A
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 = -2.515194605134363E-01, IMY = 3.980184254623811E-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: -105.843410 -8.696000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9935 -15.6395 0.5 17.7 105.1 3.6764 22.7 0.8 Sco X-1 254.5758 35.2704 6.0 50.9 19.7 0.8704 1.9 7.2 Her X-1 255.8979 -37.8333 3.0 38.1 135.2 1.1831 3.8 4.3 4U 1700-377 256.3739 -36.2976 6.2 37.4 132.9 -0.5780 -1.8 8.1 GX 349+2 262.9588 -24.6948 4.1 36.6 111.4 1.0351 2.8 4.1 GX 1+4 264.9226 -44.3937 20.7 47.5 136.3 0.3788 0.6 8.4 4U 1735-44 263.1241 -33.8455 9.3 40.5 124.7 -0.5899 -1.2 6.8 GX 354-0 263.1886 -19.4029 2.7 35.4 102.6 1.4861 4.3 ------ UNKNOWN 209.8136 31.5844 2.6 44.3 -30.8 1.0935 4.4 ------ UNKNOWN 191.8662 15.6170 3.2 43.6 -64.0 2.7289 3.6 ------ UNKNOWN 182.9748 -22.8376 2.9 45.4 -121.5 2.5888 3.9 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -8.696000 19.156590 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.8383 -15.4871 0.0 17.5 104.8 0.1773 2.0 12.3 Sco X-1 254.3318 35.3003 4.2 50.8 19.4 0.7263 2.7 6.7 Her X-1 256.1500 -37.8624 5.3 38.2 135.0 0.4000 2.2 7.8 4U 1700-377 256.4287 -36.3018 3.4 37.4 132.8 0.5761 3.4 7.3 GX 349+2 262.9433 -24.7344 4.3 36.6 111.4 -0.5181 -2.7 3.6 GX 1+4 264.7190 -44.3665 9.6 47.4 136.4 0.4313 1.2 5.1 4U 1735-44 262.9906 -33.8320 1529.3 40.4 124.7 -0.0019 -0.0 0.2 GX 354-0 223.1598 -56.2602 2.3 47.3 175.5 0.8293 5.0 ------ UNKNOWN 203.9663 -18.3208 0.4 25.2 -122.3 2.8083 31.3 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 66.156600 607.256610 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 170.2872 -60.6043 3.2 48.6 179.3 3.7287 3.6 1.4 Cen X-3 186.8539 -62.7859 4.7 46.0 168.8 2.4104 2.4 5.5 GX 301-2 244.9982 -15.6645 1.3 39.2 70.4 16.1462 8.7 1.8 Sco X-1 233.9119 -63.1194 2.5 49.2 140.6 9.6611 4.6 ------ UNKNOWN 233.8643 -46.6319 2.5 37.4 123.7 5.3119 4.6 ------ UNKNOWN 211.2172 -27.0200 2.7 10.9 121.9 1.5829 4.3 ------ UNKNOWN 144.4702 -54.2375 4.1 57.6 -165.4 5.9252 2.8 ------ UNKNOWN 180.1259 -12.0423 2.9 23.9 -100.2 1.6581 4.0 ------ UNKNOWN 205.7712 37.1494 2.7 55.5 -20.4 5.5917 4.2 ------ UNKNOWN 155.9676 -19.3546 2.6 45.3 -121.4 9.0123 4.5 ------ UNKNOWN 152.5202 -24.6359 4.5 48.1 -129.1 5.4566 2.5 ------ UNKNOWN