batgrbproduct Analysis for Trigger=589685
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): Mon Mar 3 05:13:45 EST 2014
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger589685/GCN5_download_cron
======================================================================
Trigger: 00589685 Segment: 000
BAT Trigger Time: 415440790.528 [s; MET]
Trigger Stop: 415440791.552 [s; MET]
UTC: 2014-03-02T08:12:58.819460 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 253.841655755428 Dec: -12.8649539240131 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 14.66
Image Trigger?: NO
Rate S/N Ratio: 32.2024843762092 [ if not an image trigger ]
Image S/N Ratio: 14.66
Flight Position: [ source = BAT ]
RA: 253.841655755428 Dec: -12.8649539240131 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 253.861095227846 Dec: -12.8749100700504 [deg; J2000]
{ 16h 55m 26.7s , -12d 52' 29.7" }
+/- 1.08153167371989 [arcmin] (estimated 90% radius based on SNR)
+/- 0.375934323285593 [arcmin] (formal 1-sigma fit error)
SNR: 27.1951144210707
Angular difference between Flight and Ground position is 1.284434 arcmin
Partial Coding Fraction: 0.8203125 [ including projection effects ]
Duration
T90: 87.9079999923706 +/- 10.8750836664086
Measured from: 0.640000104904175
to: 88.5480000972748 [s; relative to TRIGTIME]
T50: 40.6719999313354 +/- 6.45364766738417
Measured from: 12.2160001397133
to: 52.8880000710487 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.0979999899864197
to: 0.90200001001358 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.0879999995231628
to: 116.10799998045 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.922603 1.280260 1.336067 0.466741
0.071054 0.064913 0.054745 0.046890 [error]
Peak 0.028277 0.083457 0.089129 0.030350
0.007383 0.007455 0.007001 0.005571 [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 2.28e-07 5.43e-07 1.03e-06 4.70e-06 2.78e-06 6.50e-06 erg/cm2
Error 1.91e-08 3.43e-08 5.34e-08 6.10e-07 1.39e-07 6.27e-07 erg/cm2
Peak flux Power-law 3.53e-01 5.10e-01 5.47e-01 1.09e+00 1.75e+00 2.50e+00 ph/cm2/s
Error 7.09e-02 6.29e-02 5.37e-02 2.30e-01 1.70e-01 2.62e-01 ph/cm2/s
Fluence Cutoff-PL 2.30e-07 5.44e-07 1.02e-06 4.90e-06 2.78e-06 6.81e-06 erg/cm2
Error 2.68e-08 3.42e-08 4.22e-08 8.48e-07 1.38e-07 8.37e-07 erg/cm2
Peak flux Cutoff-PL 2.65e-01 5.35e-01 6.09e-01 4.34e-01 1.67e+00 1.84e+00 ph/cm2/s
Error 8.42e-02 7.26e-02 6.83e-02 2.61e-01 1.77e-01 3.10e-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 1.082 0.093 - - 2.27e-03 1.11e-04 53.260 57
CPL 1.079 0.094 9999.4 0.0 2.29e-03 3.69e-04 53.300 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.899 0.161 - - 1.52e-02 1.47e-03 51.940 57
CPL -0.186 0.798 114.6 68.5 4.61e-02 4.34e-02 44.690 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: 94.080000 sec.
T50 in the 50-300 keV band: 31.552000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 116.196 -0.088 116.108
T90 87.908 0.640 88.548
T50 40.672 12.216 52.888
Peak 1.000 -0.098 0.902
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
253.8611 -12.8749 0.0071 18.4 41.0 1.5145 27.2 TRIG_00589685
------------------------------------------
Foreground time interval of the image:
-0.088 18.573 (delta_t = 18.661 [sec])
Background time interval of the image:
-239.528 -219.398 (delta_t = 20.130 [sec])
-218.528 -143.148 (delta_t = 75.380 [sec])
-141.528 -0.088 (delta_t = 141.440 [sec])
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
Time interval is from -0.088 sec. to 116.108 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.08208 ( -0.0940131 0.0925794 )
Norm@50keV : 2.27332E-03 ( -0.000111307 0.000110852 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.26 using 59 PHA bins.
# Reduced chi-squared = 0.9345 for 57 degrees of freedom
# Null hypothesis probability = 6.159788e-01
Photon flux (15-150 keV) in 116.2 sec: 0.263251 ( -0.0135844 0.0136421 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.77785e-06 ( -1.38667e-07 1.3931e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.088 sec. to 116.108 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.07924 ( -0.0968613 0.0912112 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 2.28509E-03 ( -0.000110488 0.000628221 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.30 using 59 PHA bins.
# Reduced chi-squared = 0.9517 for 56 degrees of freedom
# Null hypothesis probability = 5.778607e-01
Photon flux (15-150 keV) in 116.2 sec: 0.263373 ( -0.01382 0.012967 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.77663e-06 ( -1.37046e-07 1.39556e-07 ) ergs/cm2
Band function
Time interval is from -0.088 sec. to 116.108 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.854138 ( 0.854138 0.854138 )
beta : -1.08209 ( -0.0925929 0.0940277 )
Epeak [keV] : 58.2340 ( -58.234 -58.234 )
Norm@50keV : 3.98496E-03 ( -0.00152919 120114 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.26 using 59 PHA bins.
# Reduced chi-squared = 0.9685 for 55 degrees of freedom
# Null hypothesis probability = 5.411865e-01
Photon flux (15-150 keV) in 116.2 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] : 23.2916 ( )
R^2/D10^2 : 7.43679E-03 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 135.85 using 59 PHA bins.
# Reduced chi-squared = 2.3833 for 57 degrees of freedom
# Null hypothesis probability = 2.195378e-08
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.444e-08 9.145e-09
25- 50 4.613e-07 3.724e-08
50-150 1.869e-06 1.371e-07
15-150 2.414e-06 1.418e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 1.13032 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 134.71 using 59 PHA bins.
# Reduced chi-squared = 2.3632 for 57 degrees of freedom
# Null hypothesis probability = 3.099306e-08
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.271e-07 1.784e-08
25- 50 6.291e-07 3.544e-08
50-150 1.380e-06 2.325e-07
15-150 2.336e-06 1.551e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.65841 (-1.296 1.59261)
R1^2/D10^2 : 0.251880 (-0.13362 0.330082)
kT2 [keV] : 32.6069 (-4.00945 6.03759)
R2^2/D10^2 : 2.37477E-03 (-0.000964509 0.00122805)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.66 using 59 PHA bins.
# Reduced chi-squared = 0.9575 for 55 degrees of freedom
# Null hypothesis probability = 5.645166e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.409e-07 6.443e-08
25- 50 5.223e-07 7.890e-08
50-150 2.042e-06 2.568e-07
15-150 2.805e-06 3.329e-07
Peak spectrum fit
Power-law model
Time interval is from -0.098 sec. to 0.902 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.899060 ( -0.164112 0.158384 )
Norm@50keV : 1.52256E-02 ( -0.00147873 0.00147063 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.94 using 59 PHA bins.
# Reduced chi-squared = 0.9113 for 57 degrees of freedom
# Null hypothesis probability = 6.647083e-01
Photon flux (15-150 keV) in 1 sec: 1.74754 ( -0.16951 0.170067 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.70933e-07 ( -1.70848e-08 1.71824e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.098 sec. to 0.902 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.186329 ( -0.876867 0.718479 )
Epeak [keV] : 114.565 ( -28.6446 108.32 )
Norm@50keV : 4.61358E-02 ( -0.0235837 0.0632305 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.69 using 59 PHA bins.
# Reduced chi-squared = 0.7981 for 56 degrees of freedom
# Null hypothesis probability = 8.612413e-01
Photon flux (15-150 keV) in 1 sec: 1.66945 ( -0.17673 0.17714 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.60488e-07 ( -1.9462e-08 1.9138e-08 ) ergs/cm2
Band function
Time interval is from -0.098 sec. to 0.902 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.856641 ( 0.856453 0.856453 )
beta : -0.899130 ( -0.15829 0.163814 )
Epeak [keV] : 13.7962 ( -13.7952 -13.7952 )
Norm@50keV : 2.28756E-02 ( -0.00921701 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.94 using 59 PHA bins.
# Reduced chi-squared = 0.9444 for 55 degrees of freedom
# Null hypothesis probability = 5.921346e-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] : 21.9168 (-2.57419 3.10907)
R^2/D10^2 : 6.54478E-02 (-0.0221548 0.0317597)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.03 using 59 PHA bins.
# Reduced chi-squared = 0.8776 for 57 degrees of freedom
# Null hypothesis probability = 7.319661e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.828e-09 1.145e-09
25- 50 3.075e-08 4.060e-09
50-150 1.103e-07 1.767e-08
15-150 1.469e-07 1.900e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 7.07973 (-0.70977 0.7097)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 93.12 using 59 PHA bins.
# Reduced chi-squared = 1.634 for 57 degrees of freedom
# Null hypothesis probability = 1.787961e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.763e-08 9.875e-09
25- 50 3.392e-08 1.833e-08
50-150 7.440e-08 3.790e-08
15-150 1.260e-07 6.829e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 14.4597 (-5.31108 4.80484)
R1^2/D10^2 : 0.162871 (-0.0811649 0.241549)
kT2 [keV] : 55.4743 (-37.3843 -55.4472)
R2^2/D10^2 : 2.68244E-03 (-0.00235908 0.0266805)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.86 using 59 PHA bins.
# Reduced chi-squared = 0.7611 for 55 degrees of freedom
# Null hypothesis probability = 9.039174e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.998e-09 4.168e-09
25- 50 3.365e-08 1.783e-08
50-150 1.210e-07 6.004e-08
15-150 1.627e-07 7.605e-08
Plot creation:
Mon Mar 3 05:52:46 EST 2014