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: Fri Jul 15 14:13:48 EDT 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger702252
======================================================================
Trigger: 00702252 Segment: 000
BAT Trigger Time: 488952266.432 [s; MET]
Trigger Stop: 488952267.456 [s; MET]
UTC: 2016-06-30T04:04:09.942380 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 198.239285438184 Dec: -56.0685035261327 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.82
Image Trigger?: NO
Rate S/N Ratio: 17.8044938147649 [ if not an image trigger ]
Image S/N Ratio: 7.82
Analysis Position: [ source = BAT ]
RA: 198.239285438184 Dec: -56.0685035261327 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 198.237918550575 Dec: -56.0283388415911 [deg; J2000]
{ 13h 12m 57.1s , -56d 01' 42.0" }
+/- 1.3771528524962 [arcmin] (estimated 90% radius based on SNR)
+/- 0.423329449685849 [arcmin] (formal 1-sigma fit error)
SNR: 19.2562828759618
Angular difference between the analysis and refined position is 2.410316 arcmin
Partial Coding Fraction: 0.515625 [ including projection effects ]
Duration
T90: 29.5520000457764 +/- 5.60842792208861
Measured from: -0.407999992370605
to: 29.1440000534058 [s; relative to TRIGTIME]
T50: 10.7520000338554 +/- 2.28217440788382
Measured from: 2.216000020504
to: 12.9680000543594 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.419999957084656
to: 0.580000042915344 [s; relative to TRIGTIME]
Total Fluence
Measured from: -1.41600000858307
to: 34.8880000114441 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.481851 0.653517 0.587300 0.171749
0.049268 0.048505 0.042284 0.035449 [error]
Peak 0.041072 0.034511 0.066391 0.015881
0.008741 0.009190 0.007965 0.006909 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 36.304 -1.416 34.888
T90 29.552 -0.408 29.144
T50 10.752 2.216 12.968
Peak 1.000 -0.420 0.580
====== 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 -1.319 -0.134 0.135 - - - 3.53e-03 -2.61e-04 2.61e-04 68.420 57
CPL -1.167 -0.271 0.560 297.286 -297.286 -297.286 4.16e-03 -8.61e-04 3.32e-03 68.170 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 -0.918 -0.315 0.340 - - - 1.08e-02 -1.86e-03 1.79e-03 61.330 57
CPL -0.927 -0.303 0.359 9999.360 -9999.360 -9999.360 1.09e-02 -1.72e-03 8.08e-03 61.360 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 1.38e-07 2.83e-07 4.54e-07 1.63e-06 1.26e-06 2.50e-06 erg/cm2
90%_error_low -1.94e-08 -2.41e-08 -4.12e-08 -3.10e-07 -1.02e-07 -3.38e-07 erg/cm2
90%_error_hi 2.04e-08 2.39e-08 4.09e-08 3.58e-07 1.02e-07 3.78e-07 erg/cm2
Peak flux PL 2.56e-01 3.64e-01 3.86e-01 7.55e-01 1.24e+00 1.76e+00 ph/cm2/s
90%_error_low -9.40e-02 -8.70e-02 -6.28e-02 -2.59e-01 -2.10e-01 -2.94e-01 ph/cm2/s
90%_error_hi 1.10e-01 8.38e-02 6.19e-02 3.48e-01 2.12e-01 3.15e-01 ph/cm2/s
Fluence CPL 1.33e-07 2.87e-07 4.61e-07 1.31e-06 1.25e-06 2.19e-06 erg/cm2
90%_error_low -2.43e-08 -2.61e-08 -4.33e-08 -6.54e-07 -1.11e-07 -6.58e-07 erg/cm2
90%_error_hi 1.77e-08 2.71e-08 4.66e-08 3.99e-07 1.10e-07 5.18e-07 erg/cm2
Peak flux CPL 2.56e-01 3.65e-01 3.86e-01 7.49e-01 1.24e+00 1.77e+00 ph/cm2/s
90%_error_low N/A N/A N/A N/A -2.11e-01 -4.09e-01 ph/cm2/s
90%_error_hi N/A N/A N/A N/A 2.12e-01 3.02e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 198.2379 -56.0283 0.0101 27.3095 -74.4054 1.5840673 19.256 TRIG_00702252 Foreground time interval of the image: -1.416 16.469 (delta_t = 17.885 [sec]) Background time interval of the image: -35.331 -1.416 (delta_t = 33.915 [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 -1.416 sec. to 34.888 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.31863 ( -0.134434 0.135318 ) Norm@50keV : 3.52764E-03 ( -0.000260726 0.000260709 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 68.42 using 59 PHA bins. # Reduced chi-squared = 1.200 for 57 degrees of freedom # Null hypothesis probability = 1.429703e-01 Photon flux (15-150 keV) in 36.3 sec: 0.422341 ( -0.032796 0.03293 ) ph/cm2/s Energy fluence (15-150 keV) : 1.2599e-06 ( -1.01772e-07 1.02412e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -1.416 sec. to 34.888 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.16662 ( -0.271296 0.560424 ) Epeak [keV] : 297.286 ( -297.537 -297.537 ) Norm@50keV : 4.15804E-03 ( -0.000860317 0.00332007 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 68.17 using 59 PHA bins. # Reduced chi-squared = 1.217 for 56 degrees of freedom # Null hypothesis probability = 1.276733e-01 Photon flux (15-150 keV) in 36.3 sec: 0.418898 ( -0.034766 0.034652 ) ph/cm2/s Energy fluence (15-150 keV) : 1.24758e-06 ( -1.10822e-07 1.09601e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from -0.420 sec. to 0.580 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.918237 ( -0.314904 0.34003 ) Norm@50keV : 1.08137E-02 ( -0.00185958 0.0017929 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 61.33 using 59 PHA bins. # Reduced chi-squared = 1.076 for 57 degrees of freedom # Null hypothesis probability = 3.235915e-01 Photon flux (15-150 keV) in 1 sec: 1.24145 ( -0.21027 0.21201 ) ph/cm2/s Energy fluence (15-150 keV) : 1.20523e-07 ( -1.98113e-08 1.98715e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.420 sec. to 0.580 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.926543 ( -0.303382 0.357827 ) Epeak [keV] : 9999.36 ( -9999.36 -9999.36 ) Norm@50keV : 1.09137E-02 ( -0.00171353 0.00808589 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 61.36 using 59 PHA bins. # Reduced chi-squared = 1.096 for 56 degrees of freedom # Null hypothesis probability = 2.899220e-01 Photon flux (15-150 keV) in 1 sec: 1.24121 ( -0.21053 0.21176 ) ph/cm2/s Energy fluence (15-150 keV) : 1.20454e-07 ( -1.9784e-08 1.98888e-08 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 29.552 sec. Hardness ratio (energy fluence ratio) = 1.60368818745
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 4.213452e-07 S(50-150 keV) = 8.385474e-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 = 1.388094637590144E-01, IMY = 4.973407424152088E-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: -35.331400 -1.416000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 169.9541 -60.6704 4.8 40.5 -89.1 0.8479 2.4 11.0 Cen X-3 186.5718 -62.7457 2.8 32.3 -89.3 0.4854 4.1 2.8 GX 301-2 244.9943 -15.6357 0.5 35.4 45.4 2.7577 21.6 0.9 Sco X-1 255.9913 -37.8856 5.8 15.5 81.0 -0.1443 -2.0 2.5 4U 1700-377 256.3673 -36.4243 2.0 17.0 79.5 0.4351 5.7 3.3 GX 349+2 262.9810 -24.5561 9.1 30.1 79.8 -0.1511 -1.3 11.5 GX 1+4 264.7055 -44.3752 11.9 15.2 116.3 -0.0728 -1.0 4.8 4U 1735-44 270.1865 -24.9785 2458.1 32.7 91.3 0.0005 0.0 8.0 GX 5-1 270.4503 -25.7297 5.3 32.2 92.4 0.2842 2.2 8.0 GRS 1758-258 275.9784 -30.4272 6.3 31.2 105.2 0.2286 1.8 4.5 H1820-303 285.1325 -25.0631 4.0 40.5 110.1 0.8237 2.8 10.0 HT1900.1-2455 263.0113 -33.8290 18.3 21.9 89.8 -0.0525 -0.6 1.2 GX 354-0 225.4841 -6.0795 2.3 47.6 18.5 0.8916 5.0 ------ UNKNOWN 217.4777 -36.7487 3.4 23.8 -19.3 0.2249 3.4 ------ UNKNOWN 92.4434 -79.9372 3.6 48.0 -129.3 1.0185 3.2 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -1.416000 16.468610 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 169.9657 -60.6550 4.3 40.5 -89.1 -0.7059 -2.7 10.5 Cen X-3 186.6416 -62.7682 74.3 32.3 -89.4 0.0172 0.2 0.4 GX 301-2 244.8399 -15.5865 3.4 35.4 45.2 0.3418 3.4 8.7 Sco X-1 256.1507 -37.7543 8.1 15.7 81.2 0.0896 1.4 9.5 4U 1700-377 256.4647 -36.6277 0.0 16.8 80.1 -0.0342 -0.5 12.4 GX 349+2 262.9832 -24.5534 0.0 30.1 79.8 -0.0789 -0.8 11.6 GX 1+4 264.9499 -44.3654 3.6 15.3 116.6 0.1896 3.2 10.2 4U 1735-44 270.4503 -25.0673 8.9 32.8 91.8 0.1454 1.3 9.1 GX 5-1 270.1850 -25.6885 8.9 32.1 92.0 0.1429 1.3 7.1 GRS 1758-258 276.0723 -30.3694 5.5 31.3 105.2 -0.2176 -2.1 7.6 H1820-303 284.8751 -25.0160 0.0 40.4 109.7 0.2075 0.9 10.5 HT1900.1-2455 262.7500 -33.8848 0.0 21.8 89.4 -0.1163 -1.6 12.3 GX 354-0 299.0427 -38.0661 2.4 40.1 137.4 0.5999 4.7 ------ UNKNOWN 274.8241 -31.0077 1.9 30.1 104.4 0.5386 6.1 ------ UNKNOWN 216.3253 -5.0195 2.4 51.6 7.7 0.8120 4.8 ------ UNKNOWN 287.1944 -81.4555 2.4 33.2 -146.4 0.3598 4.8 ------ UNKNOWN 198.2379 -56.0283 0.6 27.3 -74.4 1.5841 19.3 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 67.268590 962.624700 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 170.2039 -60.4182 0.0 15.3 -124.4 0.5927 1.1 12.7 Cen X-3 186.6858 -62.7827 0.5 8.9 -149.9 11.0040 22.5 1.1 GX 301-2 258.9884 -75.2187 3.6 29.3 146.7 2.6321 3.2 ------ UNKNOWN 178.5216 -61.1155 3.4 11.4 -130.7 1.6520 3.4 ------ UNKNOWN 58.1440 -73.3030 2.6 47.8 -171.9 5.7968 4.5 ------ UNKNOWN 111.9466 -51.2395 2.4 48.0 -129.1 14.7854 4.9 ------ UNKNOWN