batgrbproduct Analysis for Trigger=583105
Analysis Summary
Notes:
- 1) No attempt has been made to eliminate the non-significant decimal places.
- 2) This batgrbproduct analysis is done of the amount of data for this trigger downloaded to date.
- 3) This batgrbproduct analysis is using the flight position for the mask-weighting calculation.
- 4) This page will be updated for up to 10 downlinks after the trigger.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.46
Process Start Time (local time): Tue Jan 7 17:01:52 EST 2014
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger583105/GCN5_download_cron
======================================================================
Trigger: 00583105 Segment: 000
BAT Trigger Time: 410743280 [s; MET]
Trigger Stop: 410743984 [s; MET]
UTC: 2014-01-06T23:21:08.512700 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 297.350213168348 Dec: 30.2310817107992 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 6.02
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 6.02
Flight Position: [ source = BAT ]
RA: 297.350213168348 Dec: 30.2310817107992 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 297.314076250516 Dec: 30.2289543951339 [deg; J2000]
{ 19h 49m 15.4s , +30d 13' 44.2" }
+/- 3.33979320705116 [arcmin] (estimated 90% radius based on SNR)
+/- 2.00760112067598 [arcmin] (formal 1-sigma fit error)
SNR: 5.43184733840144
Angular difference between Flight and Ground position is 1.877705 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 679.143999993801 +/- 259.847023015542
Measured from: 55.4560000896454
to: 734.600000083447 [s; relative to TRIGTIME]
T50: 182.723999977112 +/- 303.451010913281
Measured from: 139.904000103474
to: 322.628000080585 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -80.4279999732971
to: -79.4279999732971 [s; relative to TRIGTIME]
Total Fluence
Measured from: -81.216000020504
to: 825.888000011444 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.232801 1.083810 0.121237 0.193586
0.176145 0.175460 0.147849 0.125304 [error]
Peak 0.017764 0.006581 0.028392 -0.011342
0.013669 0.012615 0.011098 0.009750 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
=== 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 Power-law 3.40e-07 3.44e-07 2.44e-07 2.77e-07 1.04e-06 1.21e-06 erg/cm2
Error 7.21e-08 7.84e-08 1.04e-07 2.16e-07 2.60e-07 3.88e-07 erg/cm2
Peak flux Power-law 7.39e-02 1.09e-01 1.20e-01 2.46e-01 3.78e-01 5.48e-01 ph/cm2/s
Error 1.05e-01 1.04e-01 9.86e-02 4.03e-01 2.63e-01 4.03e-01 ph/cm2/s
Fluence Cutoff-PL 3.47e-07 4.29e-07 7.00e-08 4.71e-10 8.46e-07 8.46e-07 erg/cm2
Error 8.26e-08 1.15e-07 1.13e-07 2.01e-08 2.05e-07 1.60e-07 erg/cm2
Peak flux Cutoff-PL 1.21e-03 6.16e-02 2.16e-01 2.09e-02 2.99e-01 3.00e-01 ph/cm2/s
Error 2.14e-02 8.96e-02 1.15e-01 9.29e-02 1.75e-01 1.81e-01 ph/cm2/s
Fluence Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Peak flux Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.490 0.381 - - 1.16e-04 3.72e-05 50.050 57
CPL -1.779 3.772 26.0 5.9 1.16e-01 0.00e+00 42.990 56
The chi2 of BB fit is 43.06 which shows a significant improvement in the fit over a PL.
Check the BB fit.
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.867 1.314 - - 3.29e-03 2.35e-03 44.690 57
CPL -9.953 0.000 74.0 60.5 1.58e+01 1.23e+02 41.500 56
Model : spectral model: simple power-law (PL) and cutoff power-law (CPL)
Ph_index : photon index: E^-{Ph_index} (minus sign is not included in the 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 PL model and at 1 keV in CPL model
Nomr_90err : 90% error of the normalization
chi2 : Chi-Squared
dof : degree of freedom
=== T90/T50 calculation in the 50-300 keV band (BATSE band) using 64 ms lc ===
T90 in the 50-300 keV band: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 907.104 -81.216 825.888
T90 679.144 55.456 734.600
T50 182.724 139.904 322.628
Peak 1.000 -80.428 -79.428
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
297.3141 +30.2290 0.0353 5.5 175.2 2.3533 5.4 TRIG_00583105
------------------------------------------
Foreground time interval of the image:
-17.599 179.500 (delta_t = 197.099 [sec])
181.000 271.880 (delta_t = 90.880 [sec])
273.000 320.840 (delta_t = 47.840 [sec])
322.000 495.880 (delta_t = 173.880 [sec])
497.000 735.940 (delta_t = 238.940 [sec])
737.000 760.101 (delta_t = 23.101 [sec])
Background time interval of the image:
Lightcurves
Notes:
- 1) All plots contain as much data as has been downloaded to date.
- 2) The mask-weighted light curves are using the flight position.
- 3) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
- 4) For all the mask-weighted lightcurves, the y-axis units are counts/sec/det where a det is 0.4 x 0.4 = 0.16 sq cm.
- 5) The verticle lines correspond to following: green dotted lines are T50 interval, black dotted lines are T90 interval, blue solid line(s) is a spacecraft slew start time, and orange solid line(s) is a spacecraft slew end time.
- 6) Time of each bin is in the middle of the bin.
1 s binning
From T0-310 s to T0+310 s
From T100_start - 20 s to T100_end + 30 s
Full time interval
64 ms binning
Full time interval
From T100_start to T100_end
From T0-5 sec to T0+5 sec
16 ms binning
From T100_start-5 s to T100_start+5 s
8 ms binning
From T100_start-3 s to T100_start+3 s
2 ms binning
From T100_start-1 s to T100_start+1 s
SN=5 or 10 sec. binning (whichever binning is satisfied first)
SN=5 or 10 sec. binning (T < 200 sec)
Spectra
Notes:
- 1) The fitting includes the systematic errors.
- 2) For long bursts, a spectral fit of 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.
- 4) For short bursts (T90<1sec), the specrtum is also fit with Blackbody, OTTB, and Double Blackbody.
Time averaged spectrum fit using the pre-slew DRM
Power-law model
Multiple GTIs in the spectrum
tstart tstop
-81.216000 -55.270000
-54.000000 179.500000
181.000000 271.880000
273.000000 320.840000
322.000000 495.880000
497.000000 735.940000
737.000000 825.888000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.49007 ( -0.353939 0.407826 )
Norm@50keV : 1.15610E-04 ( -3.66876e-05 3.7736e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.05 using 59 PHA bins.
# Reduced chi-squared = 0.8781 for 57 degrees of freedom
# Null hypothesis probability = 7.310553e-01
Photon flux (15-150 keV) in 899.9 sec: 2.25706E-02 ( -0.0043457 0.00435812 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.03688e-06 ( -2.49884e-07 2.69245e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-81.216000 -55.270000
-54.000000 179.500000
181.000000 271.880000
273.000000 320.840000
322.000000 495.880000
497.000000 735.940000
737.000000 825.888000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.77904 ( -5.31992 2.22485 )
Epeak [keV] : 25.9520 ( -6.06702 5.73177 )
Norm@50keV : 0.116209 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.99 using 59 PHA bins.
# Reduced chi-squared = 0.7677 for 56 degrees of freedom
# Null hypothesis probability = 8.989431e-01
Photon flux (15-150 keV) in 899.9 sec: 2.21239E-02 ( -0.0041244 0.0041566 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.45976e-07 ( -1.86646e-07 2.23906e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-81.216000 -55.270000
-54.000000 179.500000
181.000000 271.880000
273.000000 320.840000
322.000000 495.880000
497.000000 735.940000
737.000000 825.888000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.61257 ( -5.81025 -4.61257 )
beta : -3.63391 ( -6.10711 0.911637 )
Epeak [keV] : 24.1657 ( -3.65716 3.80586 )
Norm@50keV : 21.6077 ( -3.90594 190.23 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.41 using 59 PHA bins.
# Reduced chi-squared = 0.7712 for 55 degrees of freedom
# Null hypothesis probability = 8.927188e-01
Photon flux (15-150 keV) in 899.9 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 6.66504 (-1.09753 1.30703)
R^2/D10^2 : 5.67639E-02 (-0.0299238 0.0636884)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.06 using 59 PHA bins.
# Reduced chi-squared = 0.7554 for 57 degrees of freedom
# Null hypothesis probability = 9.141539e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.455e-07 1.169e-07
25- 50 4.294e-07 1.502e-07
50-150 5.939e-08 3.948e-08
15-150 8.343e-07 2.887e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 28.2894 (-9.23585 15.5986)
Norm : 0.197337 (-0.0619951 0.0968044)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.42 using 59 PHA bins.
# Reduced chi-squared = 0.7968 for 57 degrees of freedom
# Null hypothesis probability = 8.653731e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.503e-07 9.516e-08
25- 50 3.872e-07 1.441e-07
50-150 1.960e-07 1.367e-07
15-150 9.336e-07 2.726e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.91870 (-5.94703 -5.94703)
R1^2/D10^2 : 7.64043E-02 (-0.0754121 -0.0754121)
kT2 [keV] : 11.5755 (-12.1678 -12.1678)
R2^2/D10^2 : 1.47255E-03 (-0.00106897 0.113743)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.74 using 59 PHA bins.
# Reduced chi-squared = 0.7770 for 55 degrees of freedom
# Null hypothesis probability = 8.858535e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.511e-07 3.065e-07
25- 50 4.164e-07 4.738e-07
50-150 1.149e-07 2.241e-07
15-150 8.825e-07 9.795e-07
Peak spectrum fit
Power-law model
Time interval is from -80.428 sec. to -79.428 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.867448 ( -1.47968 1.14825 )
Norm@50keV : 3.29203E-03 ( -0.00240007 0.00229015 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.69 using 59 PHA bins.
# Reduced chi-squared = 0.7841 for 57 degrees of freedom
# Null hypothesis probability = 8.818513e-01
Photon flux (15-150 keV) in 1 sec: 0.377653 ( -0.254024 0.271822 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.74304e-08 ( -2.44546e-08 2.48296e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -80.428 sec. to -79.428 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -9.95315 ( )
Epeak [keV] : 73.9892 ( -16.4203 104.498 )
Norm@50keV : 15.7703 ( -16.2798 229.232 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.50 using 59 PHA bins.
# Reduced chi-squared = 0.7411 for 56 degrees of freedom
# Null hypothesis probability = 9.258644e-01
Photon flux (15-150 keV) in 1 sec: 0.299424 ( -0.158845 0.191579 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.23955e-08 ( -1.77199e-08 2.03036e-08 ) ergs/cm2
Band function
Time interval is from -80.428 sec. to -79.428 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -5.56886 -5 )
beta : -9.37167 ( 9.37167 19.3706 )
Epeak [keV] : 79.7764 ( -28.7758 35.1262 )
Norm@50keV : 0.390898 ( -0.21528 714218 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.26 using 59 PHA bins.
# Reduced chi-squared = 0.7683 for 55 degrees of freedom
# Null hypothesis probability = 8.959813e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 23.6004 (-9.66231 37.6894)
R^2/D10^2 : 1.25557E-02 (-0.0126233 0.0548324)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.34 using 59 PHA bins.
# Reduced chi-squared = 0.7604 for 57 degrees of freedom
# Null hypothesis probability = 9.090010e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.251e-09 8.810e-10
25- 50 6.887e-09 4.811e-09
50-150 2.862e-08 2.131e-08
15-150 3.676e-08 2.689e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-199.363 -199.363)
Norm : 1.60599 (-1.13859 1.13864)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.79 using 59 PHA bins.
# Reduced chi-squared = 0.8033 for 57 degrees of freedom
# Null hypothesis probability = 8.564276e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.999e-09 2.993e-09
25- 50 7.693e-09 5.660e-09
50-150 1.687e-08 1.265e-08
15-150 2.856e-08 2.107e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.28448 (-3.22136 60.0358)
R1^2/D10^2 : 1.61594 (-2.55963 -2.55963)
kT2 [keV] : 23.6633 (-18.6361 46.3184)
R2^2/D10^2 : 1.23523E-02 (-0.011661 0.0539771)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.30 using 59 PHA bins.
# Reduced chi-squared = 0.7873 for 55 degrees of freedom
# Null hypothesis probability = 8.731440e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.755e-09 1.019e-09
25- 50 6.915e-09 5.160e-09
50-150 2.845e-08 2.082e-08
15-150 3.712e-08 2.439e-08
Plot creation:
Tue Jan 7 17:32:30 EST 2014