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: Wed Nov 19 23:10:42 EST 2014
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger617110
======================================================================
Trigger: 00617110 Segment: 000
BAT Trigger Time: 436432719.424 [s; MET]
Trigger Stop: 436432721.472 [s; MET]
UTC: 2014-10-31T07:18:26.698680 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 128.599081849205 Dec: -59.1379265592003 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.53
Image Trigger?: NO
Rate S/N Ratio: 16.062378404209 [ if not an image trigger ]
Image S/N Ratio: 8.53
Analysis Position: [ source = BAT ]
RA: 128.599081849205 Dec: -59.1379265592003 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 128.632848314306 Dec: -59.1609031061606 [deg; J2000]
{ 08h 34m 31.9s , -59d 09' 39.3" }
+/- 1.43236668345039 [arcmin] (estimated 90% radius based on SNR)
+/- 0.504160713690341 [arcmin] (formal 1-sigma fit error)
SNR: 18.2047111740119
Angular difference between the analysis and refined position is 1.726236 arcmin
Partial Coding Fraction: 0.3203125 [ including projection effects ]
Duration
T90: 464 +/- 472.271108580654
Measured from: -18.4240000247955
to: 445.575999975204 [s; relative to TRIGTIME]
T50: 448 +/- 930.892045298487
Measured from: -18.4240000247955
to: 429.575999975204 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 5.07599997520447
to: 6.07599997520447 [s; relative to TRIGTIME]
Total Fluence
Measured from: -18.4240000247955
to: 893.575999975204 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.386964 1.763288 1.611650 0.438204
0.183519 0.186530 0.158137 0.134666 [error]
Peak 0.029756 0.015967 0.016462 0.016233
0.010248 0.010855 0.009647 0.007344 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 912.000 -18.424 893.576
T90 464.000 -18.424 445.576
T50 448.000 -18.424 429.576
Peak 1.000 5.076 6.076
====== 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 -1.296 -0.181 0.184 - - - 3.83e-04 -3.84e-05 3.84e-05 56.400 57
CPL -1.252 -0.224 0.554 939.147 -939.147 -939.147 4.01e-04 -5.57e-05 2.15e-05 56.470 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 -1.394 -0.807 0.847 - - - 5.03e-03 -2.03e-03 2.01e-03 57.880 57
CPL -1.421 1.421 0.100 9999.360 N/A N/A 4.99e-03 N/A N/A 57.890 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 3.68e-07 7.65e-07 1.25e-06 4.57e-06 3.45e-06 6.95e-06 erg/cm2
90%_error_low -7.02e-08 -8.94e-08 -1.53e-07 -1.14e-06 -3.79e-07 -1.25e-06 erg/cm2
90%_error_hi 7.42e-08 8.78e-08 1.51e-07 1.40e-06 3.81e-07 1.46e-06 erg/cm2
Peak flux PL 1.87e-01 2.00e-01 1.53e-01 1.89e-01 6.12e-01 7.29e-01 ph/cm2/s
90%_error_low -1.29e-01 -1.01e-01 -7.71e-02 -1.41e-01 -2.57e-01 -2.93e-01 ph/cm2/s
90%_error_hi 1.59e-01 9.08e-02 7.09e-02 2.81e-01 2.59e-01 2.96e-01 ph/cm2/s
Fluence CPL 3.67e-07 7.66e-07 1.25e-06 4.55e-06 3.47e-06 7.50e-06 erg/cm2
90%_error_low N/A N/A N/A N/A N/A -3.06e-06 erg/cm2
90%_error_hi N/A N/A N/A N/A N/A 1.41e-07 erg/cm2
Peak flux CPL 1.57e-01 1.15e-01 5.87e-02 5.11e-02 3.52e-01 3.82e-01 ph/cm2/s
90%_error_low N/A -1.15e-01 -5.87e-02 -5.11e-02 N/A -3.82e-01 ph/cm2/s
90%_error_hi N/A 1.36e-01 5.22e-02 5.44e-02 N/A 4.40e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 128.6328 -59.1609 0.0106 34.4690 -71.9309 2.7005786 18.205 TRIG_00617110 Foreground time interval of the image: -18.424 28.277 (delta_t = 46.701 [sec]) Background time interval of the image: -524.123 -507.849 (delta_t = 16.275 [sec]) -239.424 -18.424 (delta_t = 221.000 [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.
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
Multiple GTIs in the spectrum tstart tstop -18.424000 839.295900 840.576000 893.576000 Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.29583 ( -0.181508 0.184339 ) Norm@50keV : 3.82611E-04 ( -3.84356e-05 3.84352e-05 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 56.40 using 59 PHA bins. # Reduced chi-squared = 0.9894 for 57 degrees of freedom # Null hypothesis probability = 4.975976e-01 Photon flux (15-150 keV) in 910.7 sec: 4.56121E-02 ( -0.0048081 0.0048263 ) ph/cm2/s Energy fluence (15-150 keV) : 3.44719e-06 ( -3.78767e-07 3.81016e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum tstart tstop -18.424000 839.295900 840.576000 893.576000 Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.29202 ( -0.222555 0.554723 ) Epeak [keV] : 1.00000E+04 ( -10000 -10000 ) Norm@50keV : 3.84226E-04 ( -3.86023e-05 3.85971e-05 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 56.40 using 59 PHA bins. # Reduced chi-squared = 1.007 for 56 degrees of freedom # Null hypothesis probability = 4.597508e-01 Photon flux (15-150 keV) in 910.7 sec: 4.58106E-02 ( -0.005862 0.0054087 ) ph/cm2/s Energy fluence (15-150 keV) : 3.46917e-06 ( 0 0 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 5.076 sec. to 6.076 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.39403 ( -0.80681 0.847313 ) Norm@50keV : 5.02837E-03 ( -0.00203113 0.00201007 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 57.88 using 59 PHA bins. # Reduced chi-squared = 1.016 for 57 degrees of freedom # Null hypothesis probability = 4.424453e-01 Photon flux (15-150 keV) in 1 sec: 0.611537 ( -0.256783 0.259261 ) ph/cm2/s Energy fluence (15-150 keV) : 4.86542e-08 ( -2.11075e-08 2.12479e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 5.076 sec. to 6.076 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -3.39964 ( 3.36682 2.04638 ) Epeak [keV] : 368.367 ( ) Norm@50keV : 5.13116E-04 ( ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 57.73 using 59 PHA bins. # Reduced chi-squared = 1.031 for 56 degrees of freedom # Null hypothesis probability = 4.112073e-01 Photon flux (15-150 keV) in 1 sec: 0.352314 ( ) ph/cm2/s Energy fluence (15-150 keV) : 4.83281e-08 ( -2.0796e-08 2.15514e-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
IMX = 2.129235424054261E-01, IMY = 6.526302976132271E-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: -524.123400 -507.848900 -239.424000 -18.424000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 135.5239 -40.5250 1.1 34.4 -106.1 4.2251 10.3 1.8 Vela X-1 45.7091 -27.4563 2.6 40.4 46.6 2.2915 4.5 ------ UNKNOWN 73.8752 -83.8073 2.8 50.1 -37.1 2.7248 4.2 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -18.424000 28.276600 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 135.5921 -40.6061 7.1 34.5 -106.0 -0.2518 -1.6 4.2 Vela X-1 104.9149 -6.5209 2.8 29.9 165.6 0.3759 4.1 ------ UNKNOWN 83.5872 -60.5731 2.8 27.1 -30.0 0.3408 4.1 ------ UNKNOWN 128.3690 -8.7312 2.0 41.5 -158.9 0.7241 5.9 ------ UNKNOWN 128.6329 -59.1609 0.6 34.5 -71.9 2.7000 18.2 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 83.076600 839.295900 840.576000 962.640700 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 135.5187 -40.5633 0.8 19.1 -168.2 7.7641 14.6 0.7 Vela X-1 170.6162 -60.6953 4.9 20.8 -72.1 1.5219 2.4 9.8 Cen X-3 186.6597 -62.7691 2.9 27.5 -61.9 2.8753 3.9 0.1 GX 301-2 12.8548 -59.6065 4.4 51.1 31.3 11.4035 2.6 ------ UNKNOWN 62.0745 -77.2277 2.5 28.0 21.0 2.7397 4.7 ------ UNKNOWN 126.8293 -34.1001 2.7 25.1 172.1 2.7057 4.3 ------ UNKNOWN 131.8687 -3.3778 3.3 55.8 179.5 9.5852 3.5 ------ UNKNOWN 128.6262 -59.1466 2.1 0.0 -109.4 2.6948 5.4 ------ UNKNOWN 133.7369 -27.1629 2.4 32.2 -175.9 2.8833 4.8 ------ UNKNOWN 152.4910 -58.2937 0.9 12.4 -88.2 6.5312 12.3 ------ UNKNOWN