batgrbproduct Analysis for Trigger=586071
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): Sun Feb 9 21:53:37 EST 2014
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger586071/GCN5_download_cron
======================================================================
Trigger: 00586071 Segment: 000
BAT Trigger Time: 413623869.504 [s; MET]
Trigger Stop: 413623870.016 [s; MET]
UTC: 2014-02-09T07:30:57.881180 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 81.3347420112946 Dec: 32.477013277617 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.74
Image Trigger?: NO
Rate S/N Ratio: 15.7797338380595 [ if not an image trigger ]
Image S/N Ratio: 9.74
Flight Position: [ source = BAT ]
RA: 81.3347420112946 Dec: 32.477013277617 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 81.3278055735463 Dec: 32.4881473077939 [deg; J2000]
{ 05h 25m 18.7s , +32d 29' 17.3" }
+/- 0.812998086412076 [arcmin] (estimated 90% radius based on SNR)
+/- 0.258071839296472 [arcmin] (formal 1-sigma fit error)
SNR: 40.8848038036326
Angular difference between Flight and Ground position is 0.754675 arcmin
Partial Coding Fraction: 0.3828125 [ including projection effects ]
Duration
T90: 21.2480000257492 +/- 7.97875580224961
Measured from: 1.70400011539459
to: 22.9520001411438 [s; relative to TRIGTIME]
T50: 0.608000040054321 +/- 0.0659697080512886
Measured from: 1.96000009775162
to: 2.56800013780594 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 1.69199997186661
to: 2.69199997186661 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0.15200001001358
to: 29.2239999771118 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.363678 2.107036 1.909431 0.585176
0.064186 0.069252 0.062054 0.048818 [error]
Peak 0.768015 1.535531 1.566203 0.478885
0.025022 0.033717 0.034770 0.022468 [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 5.22e-07 9.96e-07 1.47e-06 4.63e-06 4.15e-06 7.62e-06 erg/cm2
Error 3.70e-08 4.18e-08 6.18e-08 4.38e-07 1.55e-07 4.71e-07 erg/cm2
Peak flux Power-law 1.02e+01 1.21e+01 1.04e+01 1.51e+01 3.81e+01 4.79e+01 ph/cm2/s
Error 5.32e-01 3.88e-01 2.87e-01 8.76e-01 1.05e+00 1.24e+00 ph/cm2/s
Fluence Cutoff-PL 4.89e-07 1.01e-06 1.51e-06 3.31e-06 4.10e-06 6.32e-06 erg/cm2
Error 4.73e-08 4.56e-08 7.35e-08 1.04e-06 1.63e-07 1.01e-06 erg/cm2
Peak flux Cutoff-PL 8.93e+00 1.24e+01 1.11e+01 1.01e+01 3.73e+01 4.25e+01 ph/cm2/s
Error 6.85e-01 4.16e-01 3.82e-01 1.48e+00 1.08e+00 1.87e+00 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 1.441 0.064 - - 1.49e-02 5.32e-04 39.980 57
CPL 1.170 0.260 173.0 568.3 1.97e-02 5.28e-03 36.620 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.226 0.043 - - 3.24e-01 8.35e-03 52.650 57
CPL 0.739 0.187 153.8 41.2 5.26e-01 9.60e-02 30.810 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: 0.832000 sec.
T50 in the 50-300 keV band: 0.320000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 29.072 0.152 29.224
T90 21.248 1.704 22.952
T50 0.608 1.960 2.568
Peak 1.000 1.692 2.692
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
81.3278 +32.4881 0.0047 44.9 -159.5 6.3661 40.9 TRIG_00586071
------------------------------------------
Foreground time interval of the image:
0.152 29.224 (delta_t = 29.072 [sec])
Background time interval of the image:
-60.504 0.152 (delta_t = 60.656 [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 0.152 sec. to 29.224 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.44057 ( -0.0639157 0.0638162 )
Norm@50keV : 1.48821E-02 ( -0.000532323 0.000532278 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.98 using 59 PHA bins.
# Reduced chi-squared = 0.7014 for 57 degrees of freedom
# Null hypothesis probability = 9.575841e-01
Photon flux (15-150 keV) in 29.07 sec: 1.82976 ( -0.0722164 0.0724266 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.14716e-06 ( -1.54648e-07 1.54805e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.152 sec. to 29.224 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.16966 ( -0.267295 0.252338 )
Epeak [keV] : 173.002 ( -58.7551 1077.83 )
Norm@50keV : 1.97333E-02 ( -0.00444311 0.00612149 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 36.62 using 59 PHA bins.
# Reduced chi-squared = 0.6540 for 56 degrees of freedom
# Null hypothesis probability = 9.790115e-01
Photon flux (15-150 keV) in 29.07 sec: 1.79995 ( -0.07682 0.0772 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.098e-06 ( -1.6317e-07 1.62589e-07 ) ergs/cm2
Band function
Time interval is from 0.152 sec. to 29.224 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.17093 ( -0.0994436 0.168637 )
beta : -9.28302 ( 9.283 19.283 )
Epeak [keV] : 173.732 ( -80.7598 287.7 )
Norm@50keV : 1.97004E-02 ( -0.00070354 0.00344515 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 36.62 using 59 PHA bins.
# Reduced chi-squared = 0.6659 for 55 degrees of freedom
# Null hypothesis probability = 9.733037e-01
Photon flux (15-150 keV) in 29.07 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] : 17.8667 ( )
R^2/D10^2 : 0.113720 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 193.23 using 59 PHA bins.
# Reduced chi-squared = 3.3899 for 57 degrees of freedom
# Null hypothesis probability = 1.033848e-16
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.118e-07 1.584e-08
25- 50 9.740e-07 5.160e-08
50-150 2.253e-06 1.371e-07
15-150 3.438e-06 1.410e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 7.64150 (-0.273941 0.273882)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.22 using 59 PHA bins.
# Reduced chi-squared = 0.8985 for 57 degrees of freedom
# Null hypothesis probability = 6.908245e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.533e-07 2.151e-08
25- 50 1.064e-06 4.099e-08
50-150 2.334e-06 9.084e-08
15-150 3.952e-06 1.570e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.29671 (-1.07307 1.23008)
R1^2/D10^2 : 1.47859 (-0.589003 1.1176)
kT2 [keV] : 27.5060 (-2.94964 4.26051)
R2^2/D10^2 : 2.10236E-02 (-0.00853692 0.0110398)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.76 using 59 PHA bins.
# Reduced chi-squared = 0.7593 for 55 degrees of freedom
# Null hypothesis probability = 9.058391e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.592e-07 8.459e-08
25- 50 1.020e-06 1.077e-07
50-150 2.598e-06 2.744e-07
15-150 4.078e-06 3.576e-07
Peak spectrum fit
Power-law model
Time interval is from 1.692 sec. to 2.692 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.22578 ( -0.0434836 0.0433647 )
Norm@50keV : 0.323644 ( -0.00835061 0.00834555 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.65 using 59 PHA bins.
# Reduced chi-squared = 0.9237 for 57 degrees of freedom
# Null hypothesis probability = 6.387733e-01
Photon flux (15-150 keV) in 1 sec: 38.1328 ( -1.05044 1.05186 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.2601e-06 ( -8.70376e-08 8.70986e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.692 sec. to 2.692 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.738921 ( -0.190312 0.18302 )
Epeak [keV] : 153.768 ( -27.0525 55.3927 )
Norm@50keV : 0.526052 ( -0.0856936 0.106324 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 30.81 using 59 PHA bins.
# Reduced chi-squared = 0.5502 for 56 degrees of freedom
# Null hypothesis probability = 9.975231e-01
Photon flux (15-150 keV) in 1 sec: 37.3101 ( -1.0833 1.086 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.22204e-06 ( 0 0 ) ergs/cm2
Band function
Time interval is from 1.692 sec. to 2.692 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.267536 ( -0.658648 1.43615 )
beta : -1.42366 ( 1.42197 0.107778 )
Epeak [keV] : 84.3959 ( -36.7312 123.529 )
Norm@50keV : 0.992412 ( -0.649418 8.02951 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 30.69 using 59 PHA bins.
# Reduced chi-squared = 0.5580 for 55 degrees of freedom
# Null hypothesis probability = 9.967561e-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] : 20.3372 ( )
R^2/D10^2 : 1.68915 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 263.73 using 59 PHA bins.
# Reduced chi-squared = 4.6269 for 57 degrees of freedom
# Null hypothesis probability = 2.380781e-28
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.338e-07 6.500e-09
25- 50 6.737e-07 2.600e-08
50-150 2.070e-06 8.050e-08
15-150 2.878e-06 8.450e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 162.582 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 216.75 using 59 PHA bins.
# Reduced chi-squared = 3.8026 for 57 degrees of freedom
# Null hypothesis probability = 1.823661e-20
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.048e-07 1.185e-08
25- 50 7.788e-07 2.190e-08
50-150 1.708e-06 4.600e-08
15-150 2.892e-06 8.500e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.10591 (-1.00086 1.08929)
R1^2/D10^2 : 12.8412 (-3.50702 5.33926)
kT2 [keV] : 32.2624 (-2.95914 4.09465)
R2^2/D10^2 : 0.292745 (-0.100434 0.121871)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 28.89 using 59 PHA bins.
# Reduced chi-squared = 0.5253 for 55 degrees of freedom
# Null hypothesis probability = 9.985729e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.541e-07 2.490e-08
25- 50 7.404e-07 5.135e-08
50-150 2.237e-06 1.765e-07
15-150 3.231e-06 2.085e-07
Plot creation:
Sun Feb 9 22:01:05 EST 2014