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: Thu Dec 17 11:51:11 EST 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger629302
======================================================================
Trigger: 00629302 Segment: 000
BAT Trigger Time: 444491232.832 [s; MET]
Trigger Stop: 444491233.856 [s; MET]
UTC: 2015-02-01T13:46:59.703120 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 11.8321794763577 Dec: -37.625024756673 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 6.54
Image Trigger?: NO
Rate S/N Ratio: 204.347742830695 [ if not an image trigger ]
Image S/N Ratio: 6.54
Analysis Position: [ source = BAT ]
RA: 11.8321794763577 Dec: -37.625024756673 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 11.8205780215697 Dec: -37.620817654918 [deg; J2000]
{ 00h 47m 16.9s , -37d 37' 14.9" }
+/- 1.70021337656754 [arcmin] (estimated 90% radius based on SNR)
+/- 0.731045387137309 [arcmin] (formal 1-sigma fit error)
SNR: 14.2504233843337
Angular difference between the analysis and refined position is 0.606372 arcmin
Partial Coding Fraction: 0.03417969 [ including projection effects ]
Duration
T90: 26.5919999480247 +/- 4.78816578195441
Measured from: -2.77200001478195
to: 23.8199999332428 [s; relative to TRIGTIME]
T50: 6.78399991989136 +/- 0.879945443259033
Measured from: -0.944000005722046
to: 5.83999991416931 [s; relative to TRIGTIME]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 55.952 -3.328 52.624
T90 26.592 -2.772 23.820
T50 6.784 -0.944 5.840
Peak 1.000 -0.004 0.996
====== 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 -2.350 -0.272 0.247 - - - 2.69e-03 -5.26e-04 5.17e-04 52.970 57
CPL -0.976 -0.905 1.679 27.339 -26.960 8.798 1.93e-02 -1.93e-02 2.11e-01 49.190 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 N/A N/A N/A - - - N/A N/A N/A N/A N/A
CPL N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
=== 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 2.30e-07 2.53e-07 1.99e-07 2.57e-07 7.78e-07 9.40e-07 erg/cm2
90%_error_low -3.73e-08 -3.57e-08 -5.08e-08 -1.06e-07 -1.22e-07 -1.85e-07 erg/cm2
90%_error_hi 3.79e-08 3.51e-08 5.39e-08 1.48e-07 1.25e-07 2.15e-07 erg/cm2
Peak flux PL N/A N/A N/A N/A N/A N/A ph/cm2/s
Image
15.0-350.0 keV image (Event data with DETECTION mask)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 11.8206 -37.6208 0.0134 46.4541 -63.7561 22.6352214 14.250 TRIG_00629302 Foreground time interval of the image: -3.328 11.469 (delta_t = 14.797 [sec]) Background time interval of the image: -239.832 -3.328 (delta_t = 236.504 [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 22.592 sec. to 52.624 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -2.34999 ( -0.271947 0.246928 ) Norm@50keV : 2.68540E-03 ( -0.000526324 0.000517181 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 52.97 using 59 PHA bins. # Reduced chi-squared = 0.9293 for 57 degrees of freedom # Null hypothesis probability = 6.270367e-01 Photon flux (15-150 keV) in 30.03 sec: 0.482764 ( -0.062334 0.062334 ) ph/cm2/s Energy fluence (15-150 keV) : 7.78351e-07 ( -1.21653e-07 1.25456e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 22.592 sec. to 52.624 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.976336 ( -0.905442 1.67935 ) Epeak [keV] : 27.3386 ( -26.9599 8.79762 ) Norm@50keV : 1.93182E-02 ( -0.0193181 0.211489 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 49.19 using 59 PHA bins. # Reduced chi-squared = 0.8784 for 56 degrees of freedom # Null hypothesis probability = 7.283677e-01 Photon flux (15-150 keV) in 30.03 sec: 0.467359 ( -0.063053 0.063457 ) ph/cm2/s Energy fluence (15-150 keV) : 6.97471e-07 ( -1.17247e-07 1.35722e-07 ) ergs/cm2
1-s peak spectrum fit
1-s peak spectrum unavailable, likely because there are no event data in the 1-s peak range.
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 26.592 sec. Hardness ratio (energy fluence ratio) = 0.784639298893
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 4.837217e-07 S(50-150 keV) = 2.9464259e-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 (with DETECTION mask)
IMX = 4.652280271245856E-01, IMY = 9.436413695620746E-01
Spacecraft aspect plot
Bright source in the event data image
Event data image of 15-350 keV band
Time interval of the image: -3.328000 11.468580 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 135.3554 -40.3769 0.0 41.9 137.8 0.0826 0.6 13.3 Vela X-1 170.6851 -60.6323 0.0 50.5 177.6 -0.2488 -1.1 10.9 Cen X-3 186.7517 -62.8401 3.9 55.2 -174.4 0.8958 3.0 4.9 GX 301-2 11.8206 -37.6208 0.9 46.5 -63.8 22.6448 13.4 ------ UNKNOWN
Webpage updated on: Thu Dec 17 12:25:35 EST 2015