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 GROUND-DETECTED GRB DATA PROCESSING REPORT
(This burst occurred during telescope slew)
Process Script Ver: batgrbproduct v2.46
Process Start Time: Mon Mar 23 00:10:38 EDT 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/GRB140414A
======================================================================
Trigger: 00084568 Segment: 002
BAT Trigger Time: 419148400.628
UTC: 2014-04-14T06:06:28.744 [includes UTCF correction]
Where From?: Ground analysis (best_duration.txt)
NOTE: BAT trigger time for ground-detected burst during slew is the T100 start time.
Refined Position: [ source = BAT mosaic image ]
RA: 195.334779671725 Dec: 56.911610323343 [deg; J2000]
{ 13h 01m 20.3s , +56d 54' 41.8" }
+/- 1.74669840158 [arcmin] (estimated 90% radius based on SNR)
SNR: 13.7135405058
Angular difference between the analysis and refined position is Usage: arcmin
Partial Coding Fraction: Unavailable because the burst occurred during slew.
Duration
T90: 0.495999932289124 +/- 0.0683520568627649
Measured from: 0.016
to: 0.512 [s; relative to TRIGTIME]
T50: 0.263999938964844 +/- 0.0582408661455224
Measured from: 0.192
to: 0.456 [s; relative to TRIGTIME]
====== Table of the duration information =============================
Value tstart tstop
T100 0.532 0.000 0.532
T90 0.496 0.016 0.512
T50 0.264 0.192 0.456
Peak 1.000 -0.234 0.766
====== 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 -0.667 -0.161 0.168 - - - 1.88e-02 -1.82e-03 1.80e-03 63.200 57
CPL -0.530 -0.420 0.683 664.065 -664.065 -664.065 2.15e-02 -3.88e-03 1.84e-02 63.050 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 -0.820 -0.195 0.203 - - - 1.04e-02 -1.17e-03 1.16e-03 60.830 57
CPL -0.678 -0.233 0.832 547.082 -547.082 -547.082 1.19e-02 -2.49e-03 1.45e-02 60.730 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 5.90e-09 1.82e-08 4.58e-08 3.27e-07 1.24e-07 3.97e-07 erg/cm2
90%_error_low -1.17e-09 -2.25e-09 -4.29e-09 -6.77e-08 -1.20e-08 -6.98e-08 erg/cm2
90%_error_hi 1.27e-09 2.21e-09 4.27e-09 8.05e-08 1.21e-08 8.14e-08 erg/cm2
Peak flux PL 2.23e-01 3.37e-01 3.82e-01 8.24e-01 1.19e+00 1.77e+00 ph/cm2/s
90%_error_low -5.15e-02 -4.94e-02 -4.46e-02 -1.96e-01 -1.32e-01 -2.25e-01 ph/cm2/s
90%_error_hi 5.61e-02 4.85e-02 4.42e-02 2.36e-01 1.32e-01 2.40e-01 ph/cm2/s
Fluence CPL 5.67e-09 1.83e-08 4.66e-08 2.75e-07 1.24e-07 3.44e-07 erg/cm2
90%_error_low -1.52e-09 -2.28e-09 -4.94e-09 -1.44e-07 -1.24e-08 -1.42e-07 erg/cm2
90%_error_hi 1.27e-09 2.34e-09 5.57e-09 1.65e-07 1.21e-08 7.49e-08 erg/cm2
Peak flux CPL 2.15e-01 3.40e-01 3.89e-01 7.08e-01 1.18e+00 1.65e+00 ph/cm2/s
90%_error_low -6.56e-02 -5.08e-02 -5.01e-02 -3.69e-01 -1.36e-01 -3.98e-01 ph/cm2/s
90%_error_hi 5.47e-02 5.17e-02 5.69e-02 1.78e-01 1.35e-01 3.32e-01 ph/cm2/s
======================================================================
Image
Note1: The mosaic image is made with timebin = 0.05 s; energybin = 15-350 keV
Note2: The mosaic image uses Galactic coordinate.
#RAcent DECcent POSerr Theta Phi Peak_Cts SNR Name 195.335 56.912 0.005 27.242 -30.216 0.240 13.714 UNKNOWN Image time interval: 0.000 to 0.532 [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.
Best duration plot
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 0.000 sec. to 0.532 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.666919 ( -0.16117 0.167705 ) Norm@50keV : 1.88406E-02 ( -0.00182394 0.00179944 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 63.20 using 59 PHA bins. # Reduced chi-squared = 1.109 for 57 degrees of freedom # Null hypothesis probability = 2.667864e-01 Photon flux (15-150 keV) in 0.532 sec: 2.18398 ( -0.19942 0.19969 ) ph/cm2/s Energy fluence (15-150 keV) : 1.24217e-07 ( -1.20123e-08 1.20752e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.532 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.529901 ( -0.420347 0.682908 ) Epeak [keV] : 664.065 ( -664.066 -664.066 ) Norm@50keV : 2.14698E-02 ( -0.00388361 0.018379 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 63.05 using 59 PHA bins. # Reduced chi-squared = 1.126 for 56 degrees of freedom # Null hypothesis probability = 2.410757e-01 Photon flux (15-150 keV) in 0.532 sec: 2.17513 ( -0.20318 0.20323 ) ph/cm2/s Energy fluence (15-150 keV) : 1.23715e-07 ( -1.24005e-08 1.212e-08 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from -0.234 sec. to 0.766 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.819864 ( -0.195034 0.202684 ) Norm@50keV : 1.03560E-02 ( -0.00117037 0.00116094 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 60.83 using 59 PHA bins. # Reduced chi-squared = 1.067 for 57 degrees of freedom # Null hypothesis probability = 3.396036e-01 Photon flux (15-150 keV) in 1 sec: 1.18949 ( -0.13219 0.13248 ) ph/cm2/s Energy fluence (15-150 keV) : 1.20033e-07 ( -1.44558e-08 1.45499e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.234 sec. to 0.766 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.67807 ( -0.233489 0.831622 ) Epeak [keV] : 547.082 ( -547.085 -547.085 ) Norm@50keV : 1.19468E-02 ( -0.00249259 0.0145479 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 60.73 using 59 PHA bins. # Reduced chi-squared = 1.084 for 56 degrees of freedom # Null hypothesis probability = 3.094790e-01 Photon flux (15-150 keV) in 1 sec: 1.18333 ( -0.13604 0.13477 ) ph/cm2/s Energy fluence (15-150 keV) : 1.19226e-07 ( -1.53058e-08 1.48065e-08 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 0.4959999 sec. Hardness ratio (energy fluence ratio) = 2.51941738753
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 2.4066131e-08 S(50-150 keV) = 1.0015134e-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
Mask shadow pattern unavailable because this burst occurs during telescope slews.Spacecraft aspect plot
