batgrbproduct Analysis for Trigger=585128
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): Wed Jan 29 17:29:12 EST 2014
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger585128/GCN5_download_cron
======================================================================
Trigger: 00585128 Segment: 000
BAT Trigger Time: 412658651.008 [s; MET]
Trigger Stop: 412658655.104 [s; MET]
UTC: 2014-01-29T03:23:59.430600 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 37.868986842113 Dec: -1.5867151917387 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.08
Image Trigger?: NO
Rate S/N Ratio: 8.48528137423857 [ if not an image trigger ]
Image S/N Ratio: 7.08
Flight Position: [ source = BAT ]
RA: 37.868986842113 Dec: -1.5867151917387 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 37.8508495907792 Dec: -1.59448319617304 [deg; J2000]
{ 02h 31m 24.2s , -01d 35' 40.1" }
+/- 2.20428566736224 [arcmin] (estimated 90% radius based on SNR)
+/- 0.965733548041824 [arcmin] (formal 1-sigma fit error)
SNR: 9.83412442486429
Angular difference between Flight and Ground position is 1.183458 arcmin
Partial Coding Fraction: 0.5703125 [ including projection effects ]
Duration
T90: 2.99200004339218 +/- 0.791838382571028
Measured from: 1.4080001115799
to: 4.40000015497208 [s; relative to TRIGTIME]
T50: 1.26400005817413 +/- 0.590050857938206
Measured from: 2.16000008583069
to: 3.42400014400482 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 1.90799999237061
to: 2.90799999237061 [s; relative to TRIGTIME]
Total Fluence
Measured from: 1.24799996614456
to: 4.6240000128746 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.091831 0.125207 0.021182 0.032888
0.015139 0.015534 0.013540 0.012094 [error]
Peak 0.031084 0.049502 0.022637 0.013326
0.008393 0.008821 0.007755 0.006570 [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 3.15e-08 4.08e-08 3.86e-08 6.46e-08 1.33e-07 1.75e-07 erg/cm2
Error 6.98e-09 7.15e-09 1.24e-08 4.04e-08 2.85e-08 5.54e-08 erg/cm2
Peak flux Power-law 3.51e-01 3.11e-01 1.90e-01 1.76e-01 9.27e-01 1.03e+00 ph/cm2/s
Error 1.25e-01 6.97e-02 6.58e-02 1.24e-01 2.06e-01 2.35e-01 ph/cm2/s
Fluence Cutoff-PL 2.94e-08 4.81e-08 2.93e-08 4.81e-09 1.11e-07 1.12e-07 erg/cm2
Error 8.57e-09 1.29e-08 2.44e-08 4.57e-08 3.51e-08 6.79e-08 erg/cm2
Peak flux Cutoff-PL 3.56e-01 3.12e-01 1.88e-01 1.70e-01 9.28e-01 1.02e+00 ph/cm2/s
Error 1.24e-01 5.33e-02 6.58e-02 1.75e-01 2.06e-01 2.44e-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 2.080 0.332 - - 4.23e-03 9.94e-04 52.820 57
CPL 0.498 2.555 34.5 0.0 4.13e-02 0.00e+00 51.790 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.712 0.443 - - 6.95e-03 1.81e-03 37.310 57
CPL 3.159 0.000 328.2 0.0 1.41e-03 0.00e+00 35.880 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 3.376 1.248 4.624
T90 2.992 1.408 4.400
T50 1.264 2.160 3.424
Peak 1.000 1.908 2.908
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
37.8508 -1.5945 0.0196 26.5 -79.8 0.2698 9.8 TRIG_00585128
------------------------------------------
Foreground time interval of the image:
1.248 4.624 (delta_t = 3.376 [sec])
Background time interval of the image:
-93.707 1.248 (delta_t = 94.955 [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 1.248 sec. to 4.624 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.08002 ( -0.314021 0.349589 )
Norm@50keV : 4.23334E-03 ( -0.00101181 0.000976508 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.82 using 59 PHA bins.
# Reduced chi-squared = 0.9267 for 57 degrees of freedom
# Null hypothesis probability = 6.324231e-01
Photon flux (15-150 keV) in 3.376 sec: 0.659520 ( -0.110509 0.110516 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.3254e-07 ( -2.78659e-08 2.91651e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.248 sec. to 4.624 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.498251 ( -3.48344 1.62606 )
Epeak [keV] : 34.4927 ( )
Norm@50keV : 4.13115E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.79 using 59 PHA bins.
# Reduced chi-squared = 0.9249 for 56 degrees of freedom
# Null hypothesis probability = 6.347062e-01
Photon flux (15-150 keV) in 3.376 sec: 0.625802 ( -0.117567 0.123344 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.11449e-07 ( -2.64061e-08 4.38694e-08 ) ergs/cm2
Band function
Time interval is from 1.248 sec. to 4.624 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -2.91150E-03 ( 0.995471 4.38724 )
beta : -3.01604 ( 2.65274 0.769691 )
Epeak [keV] : 34.0517 ( -33.5774 11.6861 )
Norm@50keV : 8.63242E-02 ( -0.0851169 6.39192 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.83 using 59 PHA bins.
# Reduced chi-squared = 0.9242 for 55 degrees of freedom
# Null hypothesis probability = 6.346584e-01
Photon flux (15-150 keV) in 3.376 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] : 8.96487 (-1.35513 1.58329)
R^2/D10^2 : 0.483048 (-0.228561 0.428533)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.70 using 59 PHA bins.
# Reduced chi-squared = 0.9245 for 57 degrees of freedom
# Null hypothesis probability = 6.371669e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.547e-08 7.858e-09
25- 50 5.380e-08 1.498e-08
50-150 2.028e-08 9.890e-09
15-150 9.954e-08 2.525e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 51.6676 (-19.2425 42.3498)
Norm : 3.69612 (-0.944874 1.36443)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.03 using 59 PHA bins.
# Reduced chi-squared = 0.9127 for 57 degrees of freedom
# Null hypothesis probability = 6.617138e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.073e-08 6.801e-09
25- 50 4.465e-08 1.095e-08
50-150 4.470e-08 2.388e-08
15-150 1.201e-07 3.302e-08
Double BB
R1^2/D10^2 : 0.619677 (-0.321964 0.396912)
kT2 [keV] : 200.000 ( )
R2^2/D10^2 : 4.95473E-05 (-3.62876e-05 0.000305811)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.69 using 59 PHA bins.
#Fit statistic : Chi-Squared = 48.48 using 59 PHA bins.
#Fit statistic : Chi-Squared = 48.28 using 59 PHA bins.
# Reduced chi-squared = 0.9035 for 55 degrees of freedom
# Reduced chi-squared = 0.8815 for 55 degrees of freedom
# Reduced chi-squared = 0.8779 for 55 degrees of freedom
# Null hypothesis probability = 6.769146e-01
# Null hypothesis probability = 7.202379e-01
# Null hypothesis probability = 7.271324e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.863e-08 1.396e-08
25- 50 5.038e-08 2.817e-08
50-150 2.499e-08 1.627e-08
15-150 1.040e-07 4.963e-08
Peak spectrum fit
Power-law model
Time interval is from 1.908 sec. to 2.908 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.71240 ( -0.420312 0.465783 )
Norm@50keV : 6.94808E-03 ( -0.00187275 0.00175002 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.31 using 59 PHA bins.
# Reduced chi-squared = 0.6546 for 57 degrees of freedom
# Null hypothesis probability = 9.797575e-01
Photon flux (15-150 keV) in 1 sec: 0.926815 ( -0.20616 0.206274 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.42692e-08 ( -1.73675e-08 1.79032e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.908 sec. to 2.908 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.15858 ( )
Epeak [keV] : 328.180 ( )
Norm@50keV : 1.40720E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 35.88 using 59 PHA bins.
# Reduced chi-squared = 0.6408 for 56 degrees of freedom
# Null hypothesis probability = 9.833121e-01
Photon flux (15-150 keV) in 1 sec: 0.927606 ( -0.206798 0.205554 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.31891e-08 ( -1.63785e-08 1.87289e-08 ) ergs/cm2
Band function
Time interval is from 1.908 sec. to 2.908 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.44847 ( 1.44865 1.44865 )
beta : -1.71148 ( 1.71239 0.421041 )
Epeak [keV] : 20.4517 ( -20.4872 -20.4872 )
Norm@50keV : 1.38986E-02 ( -0.00849184 1.16829 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.31 using 59 PHA bins.
# Reduced chi-squared = 0.6784 for 55 degrees of freedom
# Null hypothesis probability = 9.675533e-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] : 11.0140 (-2.95081 4.83668)
R^2/D10^2 : 0.296417 (-0.215901 0.631109)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.60 using 59 PHA bins.
# Reduced chi-squared = 0.8000 for 57 degrees of freedom
# Null hypothesis probability = 8.610685e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.515e-09 4.034e-09
25- 50 2.128e-08 9.896e-09
50-150 1.460e-08 9.097e-09
15-150 4.340e-08 1.855e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 147.125 ( )
Norm : 3.80554 (-0.908766 1.44759)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.15 using 59 PHA bins.
# Reduced chi-squared = 0.6693 for 57 degrees of freedom
# Null hypothesis probability = 9.741035e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.423e-09 5.425e-09
25- 50 1.787e-08 9.895e-09
50-150 3.765e-08 2.156e-08
15-150 6.494e-08 3.714e-08
Double BB
R1^2/D10^2 : 1.02494 ( )
kT2 [keV] : 43.3614 (-43.3705 -43.3707)
R2^2/D10^2 : 2.24136E-03 (-0.00210458 0.0611184)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.53 using 59 PHA bins.
#Fit statistic : Chi-Squared = 37.54 using 59 PHA bins.
#Fit statistic : Chi-Squared = 37.52 using 59 PHA bins.
# Reduced chi-squared = 0.7188 for 55 degrees of freedom
# Reduced chi-squared = 0.6825 for 55 degrees of freedom
# Reduced chi-squared = 0.6822 for 55 degrees of freedom
# Null hypothesis probability = 9.424942e-01
# Null hypothesis probability = 9.654509e-01
# Null hypothesis probability = 9.656331e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.739e-09 4.599e-09
25- 50 1.716e-08 1.015e-08
50-150 2.474e-08 1.644e-08
15-150 5.164e-08 2.896e-08
Plot creation:
Wed Jan 29 17:58:31 EST 2014