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: Sat May 9 18:17:47 EDT 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger614415
======================================================================
Trigger: 00614415 Segment: 000
BAT Trigger Time: 434178799.168 [s; MET]
Trigger Stop: 434178800.576 [s; MET]
UTC: 2014-10-05T05:13:06.554120 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 291.108221254116 Dec: 36.0694836240141 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.95
Image Trigger?: NO
Rate S/N Ratio: 26.6082693913001 [ if not an image trigger ]
Image S/N Ratio: 7.95
Analysis Position: [ source = BAT ]
RA: 291.108221254116 Dec: 36.0694836240141 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 291.106118552082 Dec: 36.0961918840587 [deg; J2000]
{ 19h 24m 25.5s , +36d 05' 46.3" }
+/- 1.67179060387255 [arcmin] (estimated 90% radius based on SNR)
+/- 0.812697312210627 [arcmin] (formal 1-sigma fit error)
SNR: 14.5977903744324
Angular difference between the analysis and refined position is 1.605736 arcmin
Partial Coding Fraction: 0.06347656 [ including projection effects ]
Duration
T90: 3.47200006246567 +/- 0.590267725173062
Measured from: 0.416000008583069
to: 3.88800007104874 [s; relative to TRIGTIME]
T50: 1.63200002908707 +/- 0.368347680815004
Measured from: 1.08799999952316
to: 2.72000002861023 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.675999999046326
to: 1.67599999904633 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0.192000031471252
to: 4.36800003051758 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.347403 0.595732 0.485043 0.246347
0.051190 0.062334 0.057212 0.043512 [error]
Peak 0.067546 0.208069 0.215203 0.100434
0.026479 0.033092 0.033467 0.025474 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 4.176 0.192 4.368
T90 3.472 0.416 3.888
T50 1.632 1.088 2.720
Peak 1.000 0.676 1.676
====== 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 -1.239 -0.175 0.178 - - - 2.60e-02 -2.87e-03 2.87e-03 58.850 57
CPL -0.870 -0.460 0.731 166.700 -166.700 -166.700 3.91e-02 -1.53e-02 4.63e-02 57.900 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 -0.970 -0.282 0.297 - - - 3.63e-02 -6.55e-03 6.50e-03 49.530 57
CPL -0.249 -0.856 1.439 141.097 -59.986 -141.097 7.60e-02 -4.44e-02 2.24e-01 48.360 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 1.09e-07 2.34e-07 3.97e-07 1.54e-06 1.09e-06 2.28e-06 erg/cm2
90%_error_low -2.11e-08 -2.94e-08 -5.10e-08 -3.83e-07 -1.30e-07 -4.23e-07 erg/cm2
90%_error_hi 2.21e-08 2.90e-08 5.04e-08 4.55e-07 1.30e-07 4.82e-07 erg/cm2
Peak flux PL 2.68e-04 3.26e-03 4.22e-02 3.73e+00 1.91e-01 3.77e+00 ph/cm2/s
90%_error_low -1.60e-05 -1.44e-04 -6.95e-03 -6.62e-01 -3.12e-02 -6.64e-01 ph/cm2/s
90%_error_hi 4.26e-04 4.57e-03 3.77e-02 2.09e+00 1.54e-01 2.13e+00 ph/cm2/s
Fluence CPL 1.01e-07 2.44e-07 4.15e-07 9.47e-07 1.08e-06 1.71e-06 erg/cm2
90%_error_low -2.44e-08 -3.40e-08 -5.98e-08 -5.21e-07 -1.34e-07 -5.28e-07 erg/cm2
90%_error_hi 2.52e-08 3.53e-08 6.15e-08 7.39e-07 1.33e-07 7.66e-07 erg/cm2
Peak flux CPL 7.49e-01 1.30e+00 1.40e+00 1.27e+00 4.10e+00 4.72e+00 ph/cm2/s
90%_error_low -3.53e-01 -3.10e-01 -3.05e-01 -7.60e-01 -7.63e-01 -1.11e+00 ph/cm2/s
90%_error_hi 3.10e-01 3.16e-01 3.19e-01 1.47e+00 7.68e-01 1.52e+00 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 291.1061 36.0962 0.0132 38.6239 92.3736 1.8201596 14.598 TRIG_00614415 Foreground time interval of the image: 0.192 4.368 (delta_t = 4.176 [sec]) Background time interval of the image: -239.168 0.192 (delta_t = 239.360 [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 0.192 sec. to 4.368 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.23893 ( -0.175443 0.177904 ) Norm@50keV : 2.59911E-02 ( -0.00287396 0.00287372 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 58.85 using 59 PHA bins. # Reduced chi-squared = 1.033 for 57 degrees of freedom # Null hypothesis probability = 4.074400e-01 Photon flux (15-150 keV) in 4.176 sec: 3.06862 ( -0.35112 0.35158 ) ph/cm2/s Energy fluence (15-150 keV) : 1.08959e-06 ( -1.29742e-07 1.30108e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.192 sec. to 4.368 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.869878 ( -0.459672 0.731308 ) Epeak [keV] : 166.700 ( -166.701 -166.701 ) Norm@50keV : 3.91486E-02 ( -0.0153473 0.0462658 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 57.90 using 59 PHA bins. # Reduced chi-squared = 1.034 for 56 degrees of freedom # Null hypothesis probability = 4.049723e-01 Photon flux (15-150 keV) in 4.176 sec: 3.05017 ( -0.35266 0.35311 ) ph/cm2/s Energy fluence (15-150 keV) : 1.07751e-06 ( -1.34011e-07 1.33008e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 0.676 sec. to 1.676 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.969808 ( -0.281877 0.29695 ) Norm@50keV : 3.62694E-02 ( -0.00655282 0.0064994 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 49.53 using 59 PHA bins. # Reduced chi-squared = 0.8690 for 57 degrees of freedom # Null hypothesis probability = 7.482849e-01 Photon flux (15-150 keV) in 1 sec: 0.191022 0.118924 7.75585E-02 5.61434E-02 4.51696E-02 3.92904E-02 3.59042E-02 3.38016E-02 3.24067E-02 3.14296E-02 3.01810E-02 2.63848E-02 ( ) ph/cm2/s Energy fluence (15-150 keV) : 3.96524e-07 ( -7.37341e-08 7.40414e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.676 sec. to 1.676 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.249348 ( -0.855522 1.43938 ) Epeak [keV] : 141.097 ( -59.9854 -141.096 ) Norm@50keV : 7.60277E-02 ( -0.0443527 0.224226 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 48.36 using 59 PHA bins. # Reduced chi-squared = 0.8635 for 56 degrees of freedom # Null hypothesis probability = 7.562000e-01 Photon flux (15-150 keV) in 1 sec: 4.10393 ( -0.76323 0.76797 ) ph/cm2/s Energy fluence (15-150 keV) : 3.88741e-07 ( -7.72037e-08 7.63094e-08 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 3.472 sec. Hardness ratio (energy fluence ratio) = 1.69480581596
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 3.427473e-07 S(50-150 keV) = 7.468337e-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 = -3.309004427122656E-02, IMY = -7.982866190425308E-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: -239.168000 0.192000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9892 -15.6381 0.4 49.9 -162.8 16.6248 31.0 0.6 Sco X-1 254.3189 35.1642 0.0 9.0 100.4 0.0828 0.4 12.7 Her X-1 268.4777 -1.3879 6.4 42.7 160.6 0.8857 1.8 7.6 SW J1753.5-0127
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: 0.192000 4.368000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 245.1482 -15.7529 687.9 50.1 -163.0 -0.0009 -0.0 11.9 Sco X-1 254.6015 35.5042 8.4 9.3 98.4 -0.0319 -1.4 12.0 Her X-1 268.2409 -1.3377 0.0 42.6 160.8 -0.1327 -2.3 10.3 SW J1753.5-0127 291.1060 36.0961 0.8 38.6 92.4 1.8193 14.1 ------ UNKNOWN 222.8521 -11.8585 2.0 50.1 -134.2 0.5777 5.7 ------ UNKNOWN 215.2227 -1.3371 2.1 44.4 -118.3 0.4908 5.5 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 77.332600 899.616800 900.832000 962.892000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 254.5052 35.3740 40.6 29.5 -82.4 0.2429 0.3 3.0 Her X-1 268.3660 -1.4407 5.3 43.1 -147.6 2.2682 2.2 0.7 SW J1753.5-0127 274.0664 -14.1017 6.2 52.7 -161.1 3.0350 1.8 5.3 GX 17+2 288.8039 10.9472 0.4 25.2 -176.7 17.4188 30.1 0.3 GRS 1915+105 299.5860 35.2325 1.0 7.0 92.5 5.6829 11.5 1.9 Cyg X-1 308.1221 40.9791 0.7 14.2 62.7 8.5847 15.8 1.7 Cyg X-3 326.1970 38.3356 5.2 27.9 72.7 1.7996 2.2 1.5 Cyg X-2 14.0206 72.4284 2.7 53.7 19.8 14.4514 4.2 ------ UNKNOWN 294.7598 -20.6231 2.1 56.8 173.9 16.7763 5.4 ------ UNKNOWN 300.5993 57.8555 2.9 22.7 11.2 2.0355 3.9 ------ UNKNOWN 188.5777 85.3869 3.0 55.0 -7.5 7.4476 3.8 ------ UNKNOWN 256.3401 27.5684 4.0 30.5 -98.2 2.3387 2.9 ------ UNKNOWN 192.0219 71.9408 2.9 58.6 -23.0 15.4285 3.9 ------ UNKNOWN 229.7887 48.0324 3.7 45.8 -56.9 9.7405 3.2 ------ UNKNOWN