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: Mon Jan 13 04:03:33 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger525068
======================================================================
Trigger: 00525068 Segment: 000
BAT Trigger Time: 362269182.016 [s; MET]
Trigger Stop: 362269183.04 [s; MET]
UTC: 2012-06-24T22:19:33.661820 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 170.941840070123 Dec: 8.93369375766324 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.74
Image Trigger?: NO
Rate S/N Ratio: 21.2602916254693 [ if not an image trigger ]
Image S/N Ratio: 7.74
Analysis Position: [ source = BAT ]
RA: 170.941840070123 Dec: 8.93369375766324 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 170.882824115002 Dec: 8.93146303341047 [deg; J2000]
{ 11h 23m 31.9s , +08d 55' 53.3" }
+/- 0.48399954807925 [arcmin] (estimated 90% radius based on SNR)
+/- 0.110939663549127 [arcmin] (formal 1-sigma fit error)
SNR: 85.7708810482761
Angular difference between the analysis and refined position is 3.500571 arcmin
Partial Coding Fraction: 0.8671875 [ including projection effects ]
Duration
T90: 179.663999915123 +/- 1.46002191717733
Measured from: 7.16400003433228
to: 186.827999949455 [s; relative to TRIGTIME]
T50: 128.143999934196 +/- 1.46369944835646
Measured from: 39.1080000400543
to: 167.251999974251 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 138.056000053883
to: 139.056000053883 [s; relative to TRIGTIME]
Total Fluence
Measured from: -15.12399995327
to: 192.772000014782 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 8.853346 14.344203 14.094987 4.862000
0.106657 0.119570 0.115880 0.096811 [error]
Peak 0.129778 0.237015 0.274322 0.083077
0.008267 0.010104 0.010501 0.008339 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 207.896 -15.124 192.772
T90 179.664 7.164 186.828
T50 128.144 39.108 167.252
Peak 1.000 138.056 139.056
====== 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 -1.116 -0.027 0.027 - - - 1.37e-02 -2.04e-04 2.03e-04 38.770 57
CPL -1.109 -0.028 0.054 9996.950 -9996.950 -9996.950 1.37e-02 -1.84e-04 1.90e-04 39.120 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 -0.966 -0.077 0.078 - - - 4.78e-02 -2.11e-03 2.11e-03 51.340 57
CPL -0.501 -0.316 0.342 185.881 -54.917 249.223 7.68e-02 -2.07e-02 3.07e-02 44.820 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 2.54e-06 5.90e-06 1.09e-05 4.82e-05 2.96e-05 6.75e-05 erg/cm2
90%_error_low -8.59e-08 -1.18e-07 -1.53e-07 -1.66e-06 -4.02e-07 -1.67e-06 erg/cm2
90%_error_hi 8.74e-08 1.18e-07 1.53e-07 1.70e-06 4.03e-07 1.71e-06 erg/cm2
Peak flux PL 5.92e-04 7.16e-03 6.02e-02 6.92e+00 2.66e-01 4.73e+00 ph/cm2/s
90%_error_low N/A N/A N/A N/A N/A N/A ph/cm2/s
90%_error_hi N/A N/A N/A N/A N/A N/A ph/cm2/s
Fluence CPL 2.53e-06 5.90e-06 1.09e-05 4.79e-05 2.96e-05 6.95e-05 erg/cm2
90%_error_low N/A -1.18e-07 -1.53e-07 N/A -4.02e-07 N/A erg/cm2
90%_error_hi N/A 1.18e-07 1.53e-07 N/A 3.99e-07 N/A erg/cm2
Peak flux CPL 1.04e+00 1.67e+00 1.77e+00 2.00e+00 5.39e+00 6.48e+00 ph/cm2/s
90%_error_low -1.34e-01 -9.57e-02 -1.04e-01 -4.96e-01 -2.55e-01 -5.62e-01 ph/cm2/s
90%_error_hi 1.38e-01 9.63e-02 1.05e-01 7.04e-01 2.54e-01 7.36e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 170.8828 8.9315 0.0022 15.6865 -108.9418 23.9560912 85.771 TRIG_00525068 Foreground time interval of the image: -15.124 139.885 (delta_t = 155.009 [sec]) Background time interval of the image: -239.016 -15.124 (delta_t = 223.892 [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 -15.124 sec. to 192.772 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.11617 ( -0.0268945 0.0270059 ) Norm@50keV : 1.36740E-02 ( -0.00020404 0.000203042 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 38.77 using 59 PHA bins. # Reduced chi-squared = 0.6801 for 57 degrees of freedom # Null hypothesis probability = 9.692294e-01 Photon flux (15-150 keV) in 207.9 sec: 1.58867 ( -0.02579 0.02594 ) ph/cm2/s Energy fluence (15-150 keV) : 2.95736e-05 ( -4.02353e-07 4.03178e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -15.124 sec. to 192.772 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.10939 ( -0.0280785 0.0540108 ) Epeak [keV] : 9996.95 ( -9997.82 -9997.82 ) Norm@50keV : 1.37407E-02 ( -0.000185058 0.00018889 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 39.12 using 59 PHA bins. # Reduced chi-squared = 0.6986 for 56 degrees of freedom # Null hypothesis probability = 9.578284e-01 Photon flux (15-150 keV) in 207.9 sec: 1.58793 ( -0.02582 0.02591 ) ph/cm2/s Energy fluence (15-150 keV) : 2.95675e-05 ( -4.0237e-07 3.98856e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 138.056 sec. to 139.056 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.966001 ( -0.0773949 0.0778721 ) Norm@50keV : 4.77714E-02 ( -0.00211306 0.00211202 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 51.34 using 59 PHA bins. # Reduced chi-squared = 0.9007 for 57 degrees of freedom # Null hypothesis probability = 6.864192e-01 Photon flux (15-150 keV) in 1 sec: 0.265536 ( ) ph/cm2/s Energy fluence (15-150 keV) : 5.22998e-07 ( -2.60969e-08 2.62013e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 138.056 sec. to 139.056 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.500761 ( -0.316328 0.342005 ) Epeak [keV] : 185.881 ( -54.9171 249.223 ) Norm@50keV : 7.67773E-02 ( -0.0207001 0.0307 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 44.82 using 59 PHA bins. # Reduced chi-squared = 0.8004 for 56 degrees of freedom # Null hypothesis probability = 8.581297e-01 Photon flux (15-150 keV) in 1 sec: 5.38895 ( -0.25483 0.25449 ) ph/cm2/s Energy fluence (15-150 keV) : 5.11246e-07 ( -2.78311e-08 2.77307e-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 = -9.116022833228478E-02, IMY = 2.656252137694277E-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: -239.016000 -15.124000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 227.7513 7.2905 3.0 40.6 71.4 2.9745 3.8 ------ UNKNOWN 231.5882 48.6514 2.2 54.2 16.7 5.4234 5.3 ------ UNKNOWN 212.4656 44.7032 2.4 41.7 9.3 1.4665 4.9 ------ UNKNOWN 148.8587 -22.8481 2.4 49.2 -149.9 2.1765 4.8 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -15.124000 139.884590 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 232.6529 42.9948 3.2 52.1 23.4 5.3529 3.6 ------ UNKNOWN 189.0461 -42.5255 2.7 52.0 159.5 5.5157 4.3 ------ UNKNOWN 215.3490 58.1905 3.1 53.4 -0.1 3.4395 3.7 ------ UNKNOWN 170.8828 8.9315 0.1 15.7 -108.9 23.9556 85.8 ------ UNKNOWN 192.3601 59.5283 2.6 50.3 -14.7 2.7196 4.4 ------ UNKNOWN 162.3136 15.4163 2.4 24.6 -91.9 1.6955 4.9 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 264.084590 439.784600 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 186.5878 -62.7182 2.7 40.8 -78.9 3.5913 4.2 3.7 GX 301-2 244.9791 -15.6383 0.6 31.7 41.4 5.2342 19.1 0.1 Sco X-1 255.9887 -37.8348 0.6 8.3 64.8 3.1737 18.8 0.6 4U 1700-377 256.6624 -36.3518 5.5 9.9 67.4 0.3761 2.1 11.8 GX 349+2 262.9888 -24.9014 5.5 22.2 79.4 0.4908 2.1 9.4 GX 1+4 264.8556 -44.6463 0.0 7.0 141.3 0.1301 0.7 12.7 4U 1735-44 270.3348 -25.1231 4.4 24.3 95.5 0.6435 2.7 3.8 GX 5-1 270.1825 -25.6387 5.5 23.8 95.8 0.5185 2.2 9.0 GRS 1758-258 273.9379 -14.1192 7.1 35.7 92.7 0.7865 1.6 6.3 GX 17+2 275.9968 -30.4327 4.3 22.5 113.4 0.6266 2.7 5.4 H1820-303 284.9686 -24.9414 42.8 31.9 118.9 -0.0870 -0.3 3.9 HT1900.1-2455 263.1042 -33.8160 3.9 13.7 89.2 0.5502 2.9 5.8 GX 354-0 6.4305 -70.8028 3.2 53.2 -142.1 3.9363 3.6 ------ UNKNOWN 6.6320 -67.5154 4.4 55.3 -145.3 3.9733 2.6 ------ UNKNOWN 186.7600 -36.5756 3.8 50.6 -44.6 2.8618 3.1 ------ UNKNOWN 13.4432 -82.0456 2.6 48.0 -129.1 3.5699 4.6 ------ UNKNOWN