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: Fri Jan 17 19:10:09 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger419404
======================================================================
Trigger: 00419404 Segment: 000
BAT Trigger Time: 292872814.08 [s; MET]
Trigger Stop: 292872830.464 [s; MET]
UTC: 2010-04-13T17:33:28.376380 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 266.217404254234 Dec: 15.8373523553948 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.59
Image Trigger?: NO
Rate S/N Ratio: 10.9544511501033 [ if not an image trigger ]
Image S/N Ratio: 10.59
Analysis Position: [ source = BAT ]
RA: 266.217404254234 Dec: 15.8373523553948 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 266.219946729964 Dec: 15.8356017757855 [deg; J2000]
{ 17h 44m 52.8s , +15d 50' 08.2" }
+/- 1.49140926157679 [arcmin] (estimated 90% radius based on SNR)
+/- 0.57964780762635 [arcmin] (formal 1-sigma fit error)
SNR: 17.1839460449435
Angular difference between the analysis and refined position is 0.180473 arcmin
Partial Coding Fraction: 0.4882812 [ including projection effects ]
Duration
T90: 192.63999992609 +/- 12.0942903797611
Measured from: 6.48400002717972
to: 199.12399995327 [s; relative to TRIGTIME]
T50: 99.323999941349 +/- 6.44662828120599
Measured from: 50.6480000019073
to: 149.971999943256 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 116.780000030994
to: 117.780000030994 [s; relative to TRIGTIME]
Total Fluence
Measured from: -3.40799999237061
to: 223.068000018597 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.946568 2.825665 3.104903 1.065553
0.113113 0.104492 0.090560 0.076540 [error]
Peak 0.015291 0.023675 0.036008 0.027097
0.005752 0.005700 0.005262 0.004405 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 226.476 -3.408 223.068
T90 192.640 6.484 199.124
T50 99.324 50.648 149.972
Peak 1.000 116.780 117.780
====== 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 -1.097 -0.069 0.070 - - - 2.61e-03 -9.60e-05 9.56e-05 54.970 57
CPL -1.094 -0.068 0.072 9999.360 -9999.360 -9999.360 2.62e-03 -4.91e-05 4.21e-04 55.030 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 -0.672 -0.354 0.401 - - - 5.54e-03 -1.21e-03 1.14e-03 54.830 57
CPL -0.587 -0.443 1.049 997.308 -997.308 -997.308 6.02e-03 -1.65e-03 -6.02e-03 55.000 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 5.18e-07 1.22e-06 2.28e-06 1.03e-05 6.18e-06 1.43e-05 erg/cm2
90%_error_low -4.23e-08 -5.84e-08 -8.75e-08 -9.44e-07 -2.27e-07 -9.72e-07 erg/cm2
90%_error_hi 4.38e-08 5.81e-08 8.72e-08 1.01e-06 2.27e-07 1.03e-06 erg/cm2
Peak flux PL 1.04e-01 1.72e-01 2.16e-01 5.38e-01 6.42e-01 1.03e+00 ph/cm2/s
90%_error_low -4.54e-02 -5.07e-02 -3.91e-02 -1.99e-01 -1.24e-01 -2.13e-01 ph/cm2/s
90%_error_hi 5.56e-02 4.96e-02 3.90e-02 2.82e-01 1.25e-01 2.49e-01 ph/cm2/s
Fluence CPL 5.17e-07 1.22e-06 2.28e-06 1.06e-05 6.22e-06 1.42e-05 erg/cm2
90%_error_low N/A N/A N/A -2.56e-06 -2.65e-07 -1.87e-06 erg/cm2
90%_error_hi N/A N/A N/A 1.89e-07 1.90e-07 5.03e-07 erg/cm2
Peak flux CPL 1.04e-01 1.72e-01 2.16e-01 5.34e-01 6.42e-01 1.12e+00 ph/cm2/s
90%_error_low N/A N/A N/A N/A -1.24e-01 -4.43e-01 ph/cm2/s
90%_error_hi N/A N/A N/A N/A 1.25e-01 1.35e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 266.2199 15.8356 0.0111 38.2124 166.0697 2.7812294 17.184 TRIG_00419404 Foreground time interval of the image: -3.408 64.021 (delta_t = 67.429 [sec]) Background time interval of the image: -239.080 -3.408 (delta_t = 235.672 [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 -3.408 sec. to 223.068 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.09722 ( -0.0690107 0.0697919 ) Norm@50keV : 2.60687E-03 ( -9.59708e-05 9.56086e-05 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 54.97 using 59 PHA bins. # Reduced chi-squared = 0.9644 for 57 degrees of freedom # Null hypothesis probability = 5.516766e-01 Photon flux (15-150 keV) in 226.5 sec: 0.302297 ( -0.01184 0.011885 ) ph/cm2/s Energy fluence (15-150 keV) : 6.17958e-06 ( -2.27229e-07 2.27474e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -3.408 sec. to 223.068 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.09371 ( -0.0677126 0.0722991 ) Epeak [keV] : 9999.36 ( -9999.36 -9999.36 ) Norm@50keV : 2.62150E-03 ( -4.8928e-05 0.000421013 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 55.03 using 59 PHA bins. # Reduced chi-squared = 0.9827 for 56 degrees of freedom # Null hypothesis probability = 5.115706e-01 Photon flux (15-150 keV) in 226.5 sec: 0.302184 ( ) ph/cm2/s Energy fluence (15-150 keV) : 6.21539e-06 ( -2.64822e-07 1.896e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 116.780 sec. to 117.780 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.672348 ( -0.353862 0.400736 ) Norm@50keV : 5.53998E-03 ( -0.00120543 0.00113633 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 54.83 using 59 PHA bins. # Reduced chi-squared = 0.9620 for 57 degrees of freedom # Null hypothesis probability = 5.568173e-01 Photon flux (15-150 keV) in 1 sec: 0.641865 ( -0.124077 0.125298 ) ph/cm2/s Energy fluence (15-150 keV) : 6.84857e-08 ( -1.29528e-08 1.30091e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 116.780 sec. to 117.780 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.664205 ( -0.442888 1.04929 ) Epeak [keV] : 1.00000E+04 ( -10000 -10000 ) Norm@50keV : 5.58288E-03 ( -0.00120733 -0.00558338 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 54.85 using 59 PHA bins. # Reduced chi-squared = 0.9794 for 56 degrees of freedom # Null hypothesis probability = 5.185142e-01 Photon flux (15-150 keV) in 1 sec: 0.641750 ( -0.124105 0.125188 ) ph/cm2/s Energy fluence (15-150 keV) : 6.87053e-08 ( -1.50861e-08 9.65029e-09 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 192.64 sec. Hardness ratio (energy fluence ratio) = 1.86969117039
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 1.7362122e-06 S(50-150 keV) = 4.443288e-06
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 = -7.641177845530357E-01, IMY = -1.895293253531387E-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: -239.080000 -3.408000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9843 -15.6378 0.3 22.8 92.0 12.8548 43.4 0.3 Sco X-1 256.0664 -37.7453 3.0 18.5 20.1 0.8745 3.9 7.0 4U 1700-377 256.3747 -36.4705 3.8 17.4 22.0 0.6832 3.1 4.1 GX 349+2 263.1683 -24.7845 11.8 5.1 49.3 0.1982 1.0 9.0 GX 1+4 264.6151 -44.3079 8.5 22.2 -4.5 -0.3151 -1.4 10.1 4U 1735-44 268.3279 -1.4303 10.9 20.9 169.7 0.2423 1.1 2.8 SW J1753.5-0127 270.2620 -25.0644 1.9 3.4 -47.0 1.4424 6.1 1.5 GX 5-1 270.3016 -25.6859 5.5 3.9 -42.0 0.5316 2.3 3.4 GRS 1758-258 273.9199 -14.0709 2.9 10.0 -156.1 0.9580 3.9 5.4 GX 17+2 275.7293 -30.4955 0.0 10.7 -49.5 0.4229 1.8 12.7 H1820-303 284.9803 -24.8146 18.7 15.7 -88.6 0.1424 0.6 7.0 HT1900.1-2455 288.8278 10.9117 2.0 39.0 -157.5 2.2155 5.7 2.7 GRS 1915+105 262.9330 -33.7513 29.3 12.3 9.4 -0.0936 -0.4 5.7 GX 354-0 231.5467 -63.2112 2.3 47.6 10.2 2.3781 5.0 ------ UNKNOWN 255.6974 -48.7611 1.0 28.2 6.3 2.9702 11.2 ------ UNKNOWN 312.0093 -32.4634 3.0 40.0 -76.7 3.6974 4.0 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -3.408000 64.020610 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 245.0681 -15.5815 14.6 22.7 92.2 -0.1129 -0.8 6.2 Sco X-1 255.8344 -37.7454 3.5 18.7 20.5 0.3328 3.3 9.3 4U 1700-377 256.4863 -36.5436 11.6 17.4 21.6 -0.1016 -1.0 7.6 GX 349+2 262.8632 -24.7528 4.1 5.3 51.0 0.2716 2.8 8.0 GX 1+4 264.7779 -44.4243 9.0 22.3 -4.9 0.1312 1.3 2.1 4U 1735-44 268.2665 -1.5863 38.2 20.7 169.5 -0.0297 -0.3 10.1 SW J1753.5-0127 270.3805 -25.2428 5.9 3.6 -46.7 0.2813 2.9 11.1 GX 5-1 270.2058 -25.5802 5.5 3.8 -41.7 0.3398 3.5 11.1 GRS 1758-258 274.0102 -13.8854 5.3 10.2 -156.3 0.2040 2.2 9.1 GX 17+2 275.9259 -30.3391 45.7 10.7 -50.7 0.0254 0.3 1.7 H1820-303 284.8831 -24.7655 0.0 15.6 -88.8 -0.1843 -1.7 12.5 HT1900.1-2455 288.8372 11.0492 13.6 39.1 -157.6 -0.1159 -0.9 6.6 GRS 1915+105 263.1055 -34.0124 8.6 12.5 8.3 -0.1262 -1.3 12.1 GX 354-0 234.0814 -46.5065 2.4 36.5 29.2 0.7977 4.8 ------ UNKNOWN 266.2199 15.8356 0.7 38.2 166.1 2.7808 17.2 ------ UNKNOWN 278.9668 23.5301 2.5 47.1 -177.4 0.9642 4.6 ------ UNKNOWN 295.3630 -9.5797 2.1 29.1 -122.7 0.6990 5.4 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 128.820600 963.007800 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9916 -15.6474 0.4 37.8 51.8 30.6731 28.7 0.8 Sco X-1 254.6561 35.3116 5.6 22.1 171.3 1.1151 2.1 9.9 Her X-1 263.0144 -24.7138 4.9 40.7 21.6 2.0007 2.4 1.9 GX 1+4 268.2858 -1.5061 3.8 17.4 10.3 1.5486 3.0 5.9 SW J1753.5-0127 270.2843 -25.0790 2.6 41.1 11.5 3.7834 4.5 0.0 GX 5-1 270.3032 -25.7406 76.0 41.8 11.6 0.1324 0.2 0.2 GRS 1758-258 274.0243 -14.0540 1.6 30.9 2.3 4.1933 7.3 1.5 GX 17+2 275.9245 -30.4335 14.5 47.2 5.7 -0.8092 -0.8 4.0 H1820-303 285.1920 -25.0263 0.0 44.8 -7.5 -1.2510 -1.4 10.6 HT1900.1-2455 288.8019 10.9463 0.5 22.5 -63.1 12.7760 22.4 0.2 GRS 1915+105 299.5856 35.2104 0.4 35.5 -112.2 31.0656 31.5 0.6 Cyg X-1 308.1567 40.8736 2.4 44.0 -116.2 10.5864 4.8 5.2 Cyg X-3 262.9071 -33.8328 10.3 49.8 20.8 1.7397 1.1 4.1 GX 354-0 220.4891 48.2250 3.0 49.4 158.2 7.1779 3.8 ------ UNKNOWN 240.5718 21.1704 2.5 24.9 123.5 2.8901 4.6 ------ UNKNOWN 245.9394 13.7884 2.7 19.7 103.9 2.4877 4.3 ------ UNKNOWN 266.2195 15.8682 1.8 0.0 -172.8 3.8639 6.3 ------ UNKNOWN 237.7679 70.2878 3.8 57.2 -173.9 10.0554 3.1 ------ UNKNOWN 287.2001 -13.9407 3.5 36.3 -18.8 1.9586 3.3 ------ UNKNOWN 310.0166 -10.4425 3.8 50.7 -44.5 8.9572 3.0 ------ UNKNOWN 307.9718 44.7094 2.3 45.4 -121.2 9.8880 4.9 ------ UNKNOWN