batgrbproduct Analysis for Trigger=594286
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 Apr 2 04:13:41 EDT 2014
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger594286/GCN5_download_cron
======================================================================
Trigger: 00594286 Segment: 000
BAT Trigger Time: 418069328 [s; MET]
Trigger Stop: 418069648 [s; MET]
UTC: 2014-04-01T18:21:56.166920 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 59.6402611501549 Dec: -44.4530102886671 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 5.92
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 5.92
Flight Position: [ source = BAT ]
RA: 59.6402611501549 Dec: -44.4530102886671 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 59.6094900917446 Dec: -44.5592628691114 [deg; J2000]
{ 03h 58m 26.3s , -44d 33' 33.3" }
+/- 10.0647014800209 [arcmin] (estimated 90% radius based on SNR)
+/- 8.88706234582273 [arcmin] (formal 1-sigma fit error)
SNR: 1.1234290977395
Angular difference between Flight and Ground position is 6.509710 arcmin
Partial Coding Fraction: 0.8828125 [ including projection effects ]
Duration
T90: 320 +/-
Measured from: 0
to: 320 [s; relative to TRIGTIME]
T50: 320 +/-
Measured from: 0
to: 320 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 320 second)
Measured from: 0
to: 320 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 320 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.134526 0.114671 -0.000038 -0.112817
0.069163 0.070995 0.062428 0.055702 [error]
Peak 0.134526 0.114671 -0.000038 -0.112817
0.069163 0.070995 0.062428 0.055702 [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 3.93e-08 3.38e-08 1.99e-08 1.75e-08 1.01e-07 1.09e-07 erg/cm2
Error 2.90e-08 3.25e-08 3.09e-08 6.89e-08 1.03e-07 1.42e-07 erg/cm2
Peak flux Power-law 7.15e-03 3.45e-03 1.01e-03 3.77e-04 1.18e-02 1.20e-02 ph/cm2/s
Error 5.34e-03 3.19e-03 1.52e-03 1.30e-03 8.75e-03 8.99e-03 ph/cm2/s
Fluence Cutoff-PL 3.92e-08 5.80e-08 3.18e-09 3.26e-13 1.00e-07 1.00e-07 erg/cm2
Error 3.33e-08 5.10e-08 2.31e-08 1.38e-08 6.87e-08 6.68e-08 erg/cm2
Peak flux Cutoff-PL 6.70e-03 6.13e-03 1.96e-04 1.07e-08 1.30e-02 1.30e-02 ph/cm2/s
Error 5.96e-03 5.11e-03 1.21e-03 2.52e-04 8.25e-03 8.25e-03 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 2.765 1.725 - - 5.07e-05 6.07e-05 70.360 57
CPL -3.236 0.000 27.2 0.0 6.66e-01 0.00e+00 68.190 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.765 1.725 - - 5.07e-05 6.07e-05 70.360 57
CPL -3.236 0.000 27.2 0.0 6.66e-01 0.00e+00 68.190 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 320.000 0.000 320.000
T90 320.000 0.000 320.000
T50 320.000 0.000 320.000
Peak 320.000 0.000 320.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
59.6095 -44.5593 0.1712 22.7 -35.2 0.1792 1.1 TRIG_00594286
------------------------------------------
Foreground time interval of the image:
0.000 19.100 (delta_t = 19.100 [sec])
20.000 60.750 (delta_t = 40.750 [sec])
61.000 183.135 (delta_t = 122.135 [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
0.000000 19.100000
20.000000 60.750000
61.000000 183.135000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.76540 ( -1.18323 2.2667 )
Norm@50keV : 5.07089E-05 ( -5.07105e-05 7.07753e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.36 using 59 PHA bins.
# Reduced chi-squared = 1.234 for 57 degrees of freedom
# Null hypothesis probability = 1.100153e-01
Photon flux (15-150 keV) in 182 sec: 1.18224E-02 ( -0.00862191 0.00887276 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.00505e-07 ( -1.00505e-07 1.04776e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
0.000000 19.100000
20.000000 60.750000
61.000000 183.135000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -3.23564 ( )
Epeak [keV] : 27.1840 ( )
Norm@50keV : 0.665717 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.19 using 59 PHA bins.
# Reduced chi-squared = 1.218 for 56 degrees of freedom
# Null hypothesis probability = 1.271945e-01
Photon flux (15-150 keV) in 182 sec: 1.30321E-02 ( -0.00814077 0.0083677 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.00193e-07 ( -6.24622e-08 7.49289e-08 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
0.000000 19.100000
20.000000 60.750000
61.000000 183.135000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.84547 ( -13.7994 -4.84547 )
beta : -9.37167 ( 9.37167 19.3465 )
Epeak [keV] : 27.3949 ( -10.3187 13.0073 )
Norm@50keV : 9.08860 ( -5.49668 428829 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.14 using 59 PHA bins.
# Reduced chi-squared = 1.239 for 55 degrees of freedom
# Null hypothesis probability = 1.097804e-01
Photon flux (15-150 keV) in 182 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] : 6.73260 (-3.04163 4.52106)
R^2/D10^2 : 3.32949E-02 (-0.0335432 0.388579)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.36 using 59 PHA bins.
# Reduced chi-squared = 1.199 for 57 degrees of freedom
# Null hypothesis probability = 1.441421e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.230e-08 2.877e-08
25- 50 5.365e-08 3.628e-08
50-150 7.707e-09 7.594e-09
15-150 1.037e-07 7.055e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 22.7445 (-22.8046 79.9728)
Norm : 0.137118 (-0.13747 0.560986)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.33 using 59 PHA bins.
# Reduced chi-squared = 1.216 for 57 degrees of freedom
# Null hypothesis probability = 1.267065e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.283e-08 2.877e-08
25- 50 4.121e-08 3.095e-08
50-150 1.519e-08 1.976e-08
15-150 9.923e-08 7.985e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.68147 (-3.03936 4.52237)
R1^2/D10^2 : 3.41469E-02 (-0.0302613 0.390115)
kT2 [keV] : 0.196015 (-0.196015 -0.196015)
R2^2/D10^2 : 3.57616E-06 (-3.59708e-06 -3.59708e-06)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.36 using 59 PHA bins.
# Reduced chi-squared = 1.243 for 55 degrees of freedom
# Null hypothesis probability = 1.064643e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Peak spectrum fit
Power-law model
Time interval is from 61.000 sec. to 183.135 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.76540 ( -1.18323 2.2667 )
Norm@50keV : 5.07089E-05 ( -5.07105e-05 7.07753e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.36 using 59 PHA bins.
# Reduced chi-squared = 1.234 for 57 degrees of freedom
# Null hypothesis probability = 1.100153e-01
Photon flux (15-150 keV) in 182 sec: 1.18224E-02 ( -0.00862191 0.00887276 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.00505e-07 ( -1.00505e-07 1.04776e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 61.000 sec. to 183.135 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -3.23564 ( )
Epeak [keV] : 27.1840 ( )
Norm@50keV : 0.665717 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.19 using 59 PHA bins.
# Reduced chi-squared = 1.218 for 56 degrees of freedom
# Null hypothesis probability = 1.271945e-01
Photon flux (15-150 keV) in 182 sec: 1.30321E-02 ( -0.00814077 0.0083677 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.00193e-07 ( -6.24622e-08 7.49289e-08 ) ergs/cm2
Band function
Time interval is from 61.000 sec. to 183.135 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.84547 ( -14.3861 -4.84547 )
beta : -9.37167 ( 9.37167 19.3465 )
Epeak [keV] : 27.3949 ( -10.3187 13.0073 )
Norm@50keV : 9.08860 ( -5.49668 428829 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.14 using 59 PHA bins.
# Reduced chi-squared = 1.239 for 55 degrees of freedom
# Null hypothesis probability = 1.097804e-01
Photon flux (15-150 keV) in 182 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] : 6.73260 (-3.04163 4.52106)
R^2/D10^2 : 3.32949E-02 (-0.0335432 0.388579)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.36 using 59 PHA bins.
# Reduced chi-squared = 1.199 for 57 degrees of freedom
# Null hypothesis probability = 1.441421e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.230e-08 2.946e-08
25- 50 5.365e-08 3.531e-08
50-150 7.707e-09 9.044e-09
15-150 1.037e-07 6.950e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 22.7445 (-22.8046 79.9728)
Norm : 0.137118 (-0.13747 0.560986)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.33 using 59 PHA bins.
# Reduced chi-squared = 1.216 for 57 degrees of freedom
# Null hypothesis probability = 1.267065e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.283e-08 2.748e-08
25- 50 4.121e-08 3.392e-08
50-150 1.519e-08 1.841e-08
15-150 9.923e-08 8.033e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.68147 (-3.03936 4.52237)
R1^2/D10^2 : 3.41469E-02 (-0.0302613 0.390115)
kT2 [keV] : 0.196015 (-0.196015 -0.196015)
R2^2/D10^2 : 3.57616E-06 (-3.59708e-06 -3.59708e-06)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.36 using 59 PHA bins.
# Reduced chi-squared = 1.243 for 55 degrees of freedom
# Null hypothesis probability = 1.064643e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Plot creation:
Wed Apr 2 04:20:48 EDT 2014