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.
Special note: Due to the low partial coding fraction, the refined position is found using the DETECTION mask. Therefore, the refined position and the mask shadow pattern shown here are from analyses with DETECTION mask, everything else uses the FLUX mask.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.46
Process Start Time: Sat May 9 18:44:18 EDT 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger456073
======================================================================
Trigger: 00456073 Segment: 000
BAT Trigger Time: 330728915.52 [s; MET]
Trigger Stop: 330728916.544 [s; MET]
UTC: 2011-06-25T21:08:28.426680 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 286.750429390696 Dec: 6.75284305356182 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.3
Image Trigger?: NO
Rate S/N Ratio: 144.274044789768 [ if not an image trigger ]
Image S/N Ratio: 10.3
Analysis Position: [ source = BAT ]
RA: 286.750429390696 Dec: 6.75284305356182 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: Dec: [deg; J2000]
{ 00h 00m 00.0s , +00d 00' 00.0" }
+/- -inf [arcmin] (estimated 90% radius based on SNR)
+/- 0 [arcmin] (formal 1-sigma fit error)
SNR:
Angular difference between the analysis and refined position is 4402.149900 arcmin
Partial Coding Fraction: 0.05566406 [ including projection effects ]
Duration
T90: 42.4999999403954 +/- 8.88972668448127
Measured from: -2.99199998378754
to: 39.5079999566078 [s; relative to TRIGTIME]
T50: 12.907999932766 +/- 1.25634387471193
Measured from: 4.01600003242493
to: 16.9239999651909 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 13.7400000095367
to: 14.7400000095367 [s; relative to TRIGTIME]
Total Fluence
Measured from: -6.18799996376038
to: 140.344000041485 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 9.752557 14.552656 12.728200 3.850147
0.261820 0.278943 0.262663 0.189523 [error]
Peak 1.055315 2.030570 2.197565 0.615871
0.070223 0.089850 0.095606 0.060650 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 146.532 -6.188 140.344
T90 42.500 -2.992 39.508
T50 12.908 4.016 16.924
Peak 1.000 13.740 14.740
====== 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 -1.432 -0.044 0.044 - - - 2.00e-02 -4.74e-04 4.73e-04 47.480 57
CPL -1.269 -0.082 0.179 260.481 -105.279 -260.481 2.36e-02 -3.15e-03 4.49e-03 44.860 56
=== 1-s peak spectral analysis ===
(Best model with acceptable fit: CPL)
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 -1.209 -0.077 0.077 - - - 4.21e-01 -2.00e-02 2.00e-02 59.330 57
CPL -0.540 -0.330 0.355 124.207 -24.778 63.959 8.50e-01 -2.43e-01 3.69e-01 46.520 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 3.51e-06 6.72e-06 9.97e-06 3.17e-05 2.81e-05 5.19e-05 erg/cm2
90%_error_low -1.71e-07 -1.93e-07 -2.73e-07 -1.97e-06 -6.85e-07 -2.10e-06 erg/cm2
90%_error_hi 1.74e-07 1.93e-07 2.72e-07 2.05e-06 6.85e-07 2.16e-06 erg/cm2
Peak flux PL 1.31e+01 1.57e+01 1.36e+01 2.01e+01 4.95e+01 6.25e+01 ph/cm2/s
90%_error_low -1.13e+00 -8.64e-01 -7.34e-01 -2.13e+00 -2.41e+00 -3.10e+00 ph/cm2/s
90%_error_hi 1.16e+00 8.60e-01 7.30e-01 2.26e+00 2.42e+00 3.11e+00 ph/cm2/s
Fluence CPL 3.36e-06 6.77e-06 1.01e-05 2.60e-05 2.79e-05 4.63e-05 erg/cm2
90%_error_low -2.28e-07 -2.02e-07 -3.27e-07 -4.82e-06 -7.23e-07 -4.82e-06 erg/cm2
90%_error_hi 2.33e-07 2.03e-07 3.30e-07 6.00e-06 7.21e-07 5.18e-06 erg/cm2
Peak flux CPL 1.12e+01 1.64e+01 1.48e+01 1.14e+01 4.86e+01 5.38e+01 ph/cm2/s
90%_error_low -1.41e+00 -9.71e-01 -9.56e-01 -2.63e+00 -2.45e+00 -3.63e+00 ph/cm2/s
90%_error_hi 1.45e+00 9.80e-01 9.69e-01 3.55e+00 2.45e+00 4.17e+00 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data; DETECTION mask)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 286.7457 6.7574 0.0083 41.8603 60.1205 13.2926606 23.198 TRIG_00456073 Foreground time interval of the image: -6.384 12.181 (delta_t = 18.565 [sec]) Background time interval of the image: -239.520 -6.384 (delta_t = 233.136 [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 -6.188 sec. to 140.344 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.43236 ( -0.0437445 0.0437598 ) Norm@50keV : 1.99948E-02 ( -0.000473491 0.000473325 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 47.48 using 59 PHA bins. # Reduced chi-squared = 0.8330 for 57 degrees of freedom # Null hypothesis probability = 8.114154e-01 Photon flux (15-150 keV) in 146.5 sec: 2.45354 ( -0.06566 0.06586 ) ph/cm2/s Energy fluence (15-150 keV) : 2.81273e-05 ( -6.84518e-07 6.85012e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -6.188 sec. to 140.344 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.26851 ( -0.0819677 0.178912 ) Epeak [keV] : 260.481 ( -105.284 -260.486 ) Norm@50keV : 2.35610E-02 ( -0.00315347 0.00449237 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 44.86 using 59 PHA bins. # Reduced chi-squared = 0.8011 for 56 degrees of freedom # Null hypothesis probability = 8.570990e-01 Photon flux (15-150 keV) in 146.5 sec: 2.42418 ( -0.0718 0.07206 ) ph/cm2/s Energy fluence (15-150 keV) : 2.79137e-05 ( -7.23143e-07 7.21359e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 13.740 sec. to 14.740 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.20922 ( -0.0767445 0.0766503 ) Norm@50keV : 0.421255 ( -0.0199733 0.0199733 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 59.33 using 59 PHA bins. # Reduced chi-squared = 1.041 for 57 degrees of freedom # Null hypothesis probability = 3.907679e-01 Photon flux (15-150 keV) in 1 sec: 49.5120 ( -2.4146 2.4165 ) ph/cm2/s Energy fluence (15-150 keV) : 4.26324e-06 ( -2.20647e-07 2.21115e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 13.740 sec. to 14.740 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.540157 ( -0.32962 0.354567 ) Epeak [keV] : 124.207 ( -24.7781 63.9589 ) Norm@50keV : 0.850392 ( -0.243235 0.368535 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 46.52 using 59 PHA bins. # Reduced chi-squared = 0.8307 for 56 degrees of freedom # Null hypothesis probability = 8.127402e-01 Photon flux (15-150 keV) in 1 sec: 48.6082 ( -2.4502 2.4537 ) ph/cm2/s Energy fluence (15-150 keV) : 4.19257e-06 ( -2.29698e-07 2.29036e-07 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 42.5 sec. Hardness ratio (energy fluence ratio) = 1.48214261279
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 1.0234031e-05 S(50-150 keV) = 1.7893081e-05
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 (with DETECTION mask)
IMX = 4.463664410743676E-01, IMY = -7.768972282570237E-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: -239.520000 -6.188000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9805 -15.6395 0.2 7.3 -72.6 11.7962 52.0 0.1 Sco X-1 254.4540 35.1928 4.8 52.8 5.0 1.9724 2.4 9.0 Her X-1 256.0279 -37.8845 3.1 20.5 174.3 0.8953 3.8 3.1 4U 1700-377 256.3941 -36.4333 2.8 19.2 172.6 0.9335 4.0 2.1 GX 349+2 263.0389 -24.7565 0.8 12.3 130.1 3.1821 13.7 1.8 GX 1+4 264.7964 -44.4464 6.9 28.8 164.0 0.4875 1.7 2.3 4U 1735-44 268.2819 -1.6012 3.8 22.4 49.0 0.9035 3.1 10.3 SW J1753.5-0127 270.2765 -25.0672 2.7 18.3 119.9 1.0442 4.2 0.8 GX 5-1 270.1577 -25.8766 104.4 18.5 122.4 0.0279 0.1 11.2 GRS 1758-258 274.0121 -13.9476 8.1 21.2 85.9 0.4544 1.4 5.3 GX 17+2 275.8047 -30.3438 4.7 24.9 127.9 0.7921 2.5 6.4 H1820-303 285.0184 -24.9310 470.2 31.3 112.0 0.0112 0.0 1.1 HT1900.1-2455 262.9865 -33.8807 41.1 18.9 154.3 -0.0707 -0.3 2.8 GX 354-0 239.4090 24.8920 2.8 44.3 -14.1 1.7415 4.2 ------ UNKNOWN 233.0255 38.6342 3.0 59.1 -14.7 6.3375 3.9 ------ UNKNOWN 223.7233 -38.1876 3.1 32.3 -132.6 1.1779 3.8 ------ UNKNOWN 223.0705 32.7307 4.6 57.6 -26.4 4.1475 2.5 ------ UNKNOWN 199.6315 -56.7778 4.0 55.3 -145.3 5.1508 3.0 ------ UNKNOWN 206.8042 -29.7510 3.3 43.1 -112.3 4.7098 3.5 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -6.188000 12.180600 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.8321 -15.7131 5.7 7.4 -73.5 0.1450 2.0 9.6 Sco X-1 254.4430 35.2747 3.8 52.9 5.0 -1.1421 -3.0 4.1 Her X-1 256.1681 -37.8765 4.4 20.6 174.0 -0.2204 -2.6 8.8 4U 1700-377 256.6095 -36.3945 7.2 19.2 172.1 0.1383 1.6 8.6 GX 349+2 263.0216 -24.7234 13.0 12.3 130.0 -0.0804 -0.9 1.5 GX 1+4 264.6679 -44.3114 28.2 28.7 164.1 -0.0417 -0.4 8.9 4U 1735-44 268.4940 -1.3020 0.0 22.8 48.8 -0.0144 -0.1 11.8 SW J1753.5-0127 270.4258 -24.9296 25.7 18.4 119.3 -0.0423 -0.4 11.8 GX 5-1 270.2380 -25.9012 12.6 18.6 122.3 -0.0815 -0.9 10.1 GRS 1758-258 274.0114 -14.0283 51.4 21.2 86.2 -0.0278 -0.2 0.6 GX 17+2 275.9499 -30.3378 8.0 25.0 127.7 -0.1789 -1.4 2.2 H1820-303 285.0610 -25.0514 9.9 31.3 112.2 -0.2602 -1.2 8.0 HT1900.1-2455 263.1406 -33.6652 0.0 18.8 153.6 0.0396 0.4 12.7 GX 354-0 286.7512 6.7540 0.5 41.9 60.1 14.7449 21.2 ------ UNKNOWN 295.3049 -37.4913 2.7 42.5 129.5 1.7505 4.3 ------ UNKNOWN 251.2791 18.3781 2.9 36.0 1.1 0.4306 4.0 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 126.980600 962.560000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 254.5166 35.2190 39.0 41.1 -152.9 -0.2403 -0.3 7.9 Her X-1 262.9541 -24.6342 3.5 39.0 104.3 6.5685 3.3 7.3 GX 1+4 268.3521 -1.3984 2.6 20.1 135.5 2.3465 4.4 3.4 SW J1753.5-0127 270.1617 -25.0278 3.7 35.6 95.0 4.6829 3.1 7.3 GX 5-1 270.2539 -25.6430 11.0 36.1 94.4 1.6917 1.1 6.6 GRS 1758-258 274.0038 -13.9818 3.2 24.3 100.1 2.7144 3.6 3.3 GX 17+2 275.7432 -30.4365 5.0 38.6 84.0 5.9570 2.3 10.3 H1820-303 285.0021 -25.0240 5.6 31.8 71.7 2.0473 2.1 6.5 HT1900.1-2455 288.7990 10.9440 0.5 4.7 -86.2 12.2535 22.5 0.1 GRS 1915+105 299.5999 35.1905 0.6 30.8 -90.6 16.7610 19.4 0.8 Cyg X-1 308.0817 41.0074 3.2 39.2 -85.7 9.2535 3.6 3.5 Cyg X-3 298.2752 -6.9729 3.3 17.9 28.4 1.6462 3.5 ------ UNKNOWN 295.3488 19.7561 2.7 15.5 -79.6 2.1164 4.3 ------ UNKNOWN 334.8487 7.8646 2.5 47.7 -25.9 4.8290 4.6 ------ UNKNOWN 342.2828 3.0334 4.5 55.4 -20.4 4.7726 2.5 ------ UNKNOWN 244.7149 42.6001 3.1 51.6 -150.4 5.7366 3.7 ------ UNKNOWN 275.5938 51.0875 3.6 45.3 -121.2 7.1125 3.2 ------ UNKNOWN