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 Oct 5 19:31:34 EDT 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/GRB110107A
======================================================================
Trigger: 00090978 Segment: 002
BAT Trigger Time: 316127689.0
UTC: 2011-01-07T21:14:42.458 [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.
Analysis Position: [ source = GCN ]
RA: 299.890 Dec: 41.889 [deg; J2000]
Refined Position: [ source = BAT mosaic image ]
RA: 299.901345074437 Dec: 41.8898674508637 [deg; J2000]
{ 19h 59m 36.3s , +41d 53' 23.5" }
+/- 0.63418891254 [arcmin] (estimated 90% radius based on SNR)
SNR: 58.3069051769
Angular difference between the analysis and refined position is 0.509406 arcmin
Partial Coding Fraction: Unavailable because the burst occurred during slew.
Duration
T90: 77. +/- 3.60555127546399
Measured from: 4
to: 81 [s; relative to TRIGTIME]
T50: 46. +/- 7.28010988928052
Measured from: 22
to: 68 [s; relative to TRIGTIME]
====== Table of the duration information =============================
Value tstart tstop
T100 86.000 0.000 86.000
T90 77.000 4.000 81.000
T50 46.000 22.000 68.000
Peak 1.000 69.000 70.000
====== 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 -1.597 -0.051 0.051 - - - 6.96e-03 -1.78e-04 1.78e-04 49.780 57
CPL -1.500 -0.125 0.201 280.058 -165.767 -280.058 7.71e-03 -1.07e-03 1.79e-03 49.070 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 -1.553 -0.167 0.164 - - - 1.63e-02 -1.68e-03 1.66e-03 51.230 57
CPL -1.065 -0.569 0.873 90.050 -30.699 -90.050 2.98e-02 -1.46e-02 5.72e-02 49.960 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 8.37e-07 1.45e-06 1.92e-06 5.17e-06 5.60e-06 9.38e-06 erg/cm2
90%_error_low -4.28e-08 -4.23e-08 -6.32e-08 -3.84e-07 -1.51e-07 -4.18e-07 erg/cm2
90%_error_hi 4.38e-08 4.22e-08 6.30e-08 4.05e-07 1.51e-07 4.35e-07 erg/cm2
Peak flux PL 7.06e-01 6.88e-01 4.69e-01 5.02e-01 2.06e+00 2.36e+00 ph/cm2/s
90%_error_low -1.09e-01 -6.95e-02 -6.12e-02 -1.19e-01 -2.02e-01 -2.35e-01 ph/cm2/s
90%_error_hi 1.13e-01 6.92e-02 6.07e-02 1.40e-01 2.02e-01 2.36e-01 ph/cm2/s
Fluence CPL 8.18e-07 1.46e-06 1.93e-06 4.52e-06 5.56e-06 8.72e-06 erg/cm2
90%_error_low -5.62e-08 -4.51e-08 -6.80e-08 -1.06e-06 -1.73e-07 -1.07e-06 erg/cm2
90%_error_hi 5.09e-08 4.54e-08 6.86e-08 6.86e-07 1.70e-07 8.07e-07 erg/cm2
Peak flux CPL 6.60e-01 7.28e-01 4.83e-01 2.77e-01 2.03e+00 2.15e+00 ph/cm2/s
90%_error_low -1.29e-01 -9.09e-02 -6.65e-02 -1.62e-01 -2.09e-01 -2.73e-01 ph/cm2/s
90%_error_hi 1.31e-01 9.56e-02 6.80e-02 2.66e-01 2.09e-01 3.69e-01 ph/cm2/s
======================================================================
Image
Note1: The mosaic image is made with timebin = 0.5 s; energybin = 15-350 keV
Note2: The mosaic image uses Galactic coordinate.
#RAcent DECcent POSerr Theta Phi Peak_Cts SNR Name 299.901 41.890 0.001 13.941 -153.399 0.076 58.307 UNKNOWN Image time interval: 0.000 to 86.000 [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 86.000 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.59658 ( -0.0506516 0.0505459 ) Norm@50keV : 6.96240E-03 ( -0.000178037 0.000177961 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 49.78 using 59 PHA bins. # Reduced chi-squared = 0.8733 for 57 degrees of freedom # Null hypothesis probability = 7.401931e-01 Photon flux (15-150 keV) in 86 sec: 0.893783 ( -0.025524 0.025668 ) ph/cm2/s Energy fluence (15-150 keV) : 5.60284e-06 ( -1.50556e-07 1.50877e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 86.000 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.50047 ( -0.125131 0.200851 ) Epeak [keV] : 280.058 ( -165.77 -280.061 ) Norm@50keV : 7.71447E-03 ( -0.00107049 0.00178916 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 49.07 using 59 PHA bins. # Reduced chi-squared = 0.8762 for 56 degrees of freedom # Null hypothesis probability = 7.325528e-01 Photon flux (15-150 keV) in 86 sec: 0.886556 ( -0.029098 0.02918 ) ph/cm2/s Energy fluence (15-150 keV) : 5.56056e-06 ( -1.72676e-07 1.70412e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 69.000 sec. to 70.000 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.55302 ( -0.166892 0.163799 ) Norm@50keV : 1.62953E-02 ( -0.00167774 0.00166276 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 51.23 using 59 PHA bins. # Reduced chi-squared = 0.8988 for 57 degrees of freedom # Null hypothesis probability = 6.901927e-01 Photon flux (15-150 keV) in 1 sec: 2.06475 ( -0.20227 0.20239 ) ph/cm2/s Energy fluence (15-150 keV) : 1.53359e-07 ( -1.71048e-08 1.72767e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 69.000 sec. to 70.000 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.0651 ( -0.568277 0.873384 ) Epeak [keV] : 90.0503 ( -30.7476 -90.0988 ) Norm@50keV : 2.97642E-02 ( -0.0146302 0.0572573 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 49.96 using 59 PHA bins. # Reduced chi-squared = 0.8922 for 56 degrees of freedom # Null hypothesis probability = 7.015761e-01 Photon flux (15-150 keV) in 1 sec: 2.03203 ( -0.20943 0.20861 ) ph/cm2/s Energy fluence (15-150 keV) : 1.47106e-07 ( -1.98407e-08 1.96725e-08 ) 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
Mask shadow pattern unavailable because this burst occurs during telescope slews.Spacecraft aspect plot
