batgrbproduct Analysis for Trigger=630714
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): Thu Feb 12 08:57:56 EST 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger630714/GCN5_download_cron
======================================================================
Trigger: 00630714 Segment: 000
BAT Trigger Time: 445348344.704 [s; MET]
Trigger Stop: 445348345.728 [s; MET]
UTC: 2015-02-11T11:52:11.531880 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 254.855542489134 Dec: 55.383164888961 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 18.82
Image Trigger?: NO
Rate S/N Ratio: 50.5272203866391 [ if not an image trigger ]
Image S/N Ratio: 18.82
Flight Position: [ source = BAT ]
RA: 254.855542489134 Dec: 55.383164888961 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 254.844904177627 Dec: 55.3892484480019 [deg; J2000]
{ 16h 59m 22.8s , +55d 23' 21.3" }
+/- 0.851079977037064 [arcmin] (estimated 90% radius based on SNR)
+/- 0.293644759238425 [arcmin] (formal 1-sigma fit error)
SNR: 38.2966427942539
Angular difference between Flight and Ground position is 0.514489 arcmin
Partial Coding Fraction: 0.1640625 [ including projection effects ]
Duration
T90: 13.62399995327 +/- 2.02180512559101
Measured from: -6.70799988508224
to: 6.91600006818771 [s; relative to TRIGTIME]
T50: 6.45999997854233 +/- 0.317918230814021
Measured from: -1.47599989175797
to: 4.98400008678436 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 4.36000001430511
to: 5.36000001430511 [s; relative to TRIGTIME]
Total Fluence
Measured from: -11.6240000128746
to: 9.18000000715256 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.457889 3.218141 3.148356 0.970620
0.076204 0.088591 0.085226 0.070803 [error]
Peak 0.265664 0.524167 0.514074 0.107671
0.022232 0.027331 0.027434 0.019495 [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 6.92e-07 1.45e-06 2.39e-06 8.86e-06 6.58e-06 1.34e-05 erg/cm2
Error 4.28e-08 5.45e-08 8.33e-08 6.84e-07 2.14e-07 7.27e-07 erg/cm2
Peak flux Power-law 3.70e+00 4.08e+00 3.22e+00 4.19e+00 1.26e+01 1.52e+01 ph/cm2/s
Error 3.77e-01 2.66e-01 2.12e-01 5.47e-01 7.51e-01 8.87e-01 ph/cm2/s
Fluence Cutoff-PL 5.89e-07 1.51e-06 2.56e-06 4.35e-06 6.44e-06 9.01e-06 erg/cm2
Error 5.32e-08 6.11e-08 1.04e-07 1.00e-06 2.24e-07 9.99e-07 erg/cm2
Peak flux Cutoff-PL 2.97e+00 4.40e+00 3.62e+00 1.91e+00 1.22e+01 1.29e+01 ph/cm2/s
Error 4.58e-01 3.14e-01 2.76e-01 6.01e-01 7.63e-01 9.63e-01 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 2.97e+00 4.40e+00 3.62e+00 2.11e+00 1.22e+01 1.31e+01 ph/cm2/s
Error -------- -------- -------- -------- -------- -------- ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.283 0.053 - - 3.19e-02 1.00e-03 105.860 57
CPL 0.639 0.233 121.5 26.5 6.17e-02 1.45e-02 80.420 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.343 0.090 - - 1.04e-01 6.01e-03 78.100 57
CPL 0.367 0.432 91.8 20.9 3.00e-01 1.43e-01 59.740 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: 13.568000 sec.
T50 in the 50-300 keV band: 6.592000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 20.804 -11.624 9.180
T90 13.624 -6.708 6.916
T50 6.460 -1.476 4.984
Peak 1.000 4.360 5.360
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
254.8449 +55.3892 0.0050 49.6 13.3 9.2239 38.3 TRIG_00630714
------------------------------------------
Foreground time interval of the image:
-11.624 9.180 (delta_t = 20.804 [sec])
Background time interval of the image:
-239.704 -11.624 (delta_t = 228.080 [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 -11.624 sec. to 9.180 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.28345 ( -0.0530176 0.0527859 )
Norm@50keV : 3.18986E-02 ( -0.00100322 0.00100274 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 105.86 using 59 PHA bins.
# Reduced chi-squared = 1.8572 for 57 degrees of freedom
# Null hypothesis probability = 9.082830e-05
Photon flux (15-150 keV) in 20.8 sec: 3.79424 ( -0.128668 0.128914 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.58339e-06 ( -2.13878e-07 2.1402e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -11.624 sec. to 9.180 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.639256 ( -0.239545 0.227233 )
Epeak [keV] : 121.519 ( -18.2251 34.7148 )
Norm@50keV : 6.16959E-02 ( -0.0124912 0.0165115 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 80.42 using 59 PHA bins.
# Reduced chi-squared = 1.436 for 56 degrees of freedom
# Null hypothesis probability = 1.792650e-02
Photon flux (15-150 keV) in 20.8 sec: 3.68066 ( -0.13331 0.13371 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.43716e-06 ( -2.24598e-07 2.23746e-07 ) ergs/cm2
Band function
Time interval is from -11.624 sec. to 9.180 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.639220 ( -0.184912 0.248893 )
beta : -10.0000 ( 10 1.77636e-15 )
Epeak [keV] : 121.499 ( -10.6227 34.7232 )
Norm@50keV : 6.16966E-02 ( -0.0125038 0.0164933 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 80.42 using 59 PHA bins.
# Reduced chi-squared = 1.462 for 55 degrees of freedom
# Null hypothesis probability = 1.433244e-02
Photon flux (15-150 keV) in 20.8 sec: 3.68816 ( ) 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] : 19.2618 ( )
R^2/D10^2 : 0.196823 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 219.56 using 59 PHA bins.
# Reduced chi-squared = 3.8519 for 57 degrees of freedom
# Null hypothesis probability = 6.342839e-21
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.971e-07 1.789e-08
25- 50 1.443e-06 6.458e-08
50-150 3.944e-06 1.903e-07
15-150 5.683e-06 2.059e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 16.2162 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 173.04 using 59 PHA bins.
# Reduced chi-squared = 3.0359 for 57 degrees of freedom
# Null hypothesis probability = 1.256195e-13
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.399e-07 2.954e-08
25- 50 1.616e-06 5.543e-08
50-150 3.543e-06 1.144e-07
15-150 5.999e-06 2.028e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.07413 (-1.11783 1.23119)
R1^2/D10^2 : 1.33438 (-0.402525 0.63913)
kT2 [keV] : 30.4764 (-3.23698 4.70598)
R2^2/D10^2 : 3.28358E-02 (-0.0132472 0.0170657)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.38 using 59 PHA bins.
# Reduced chi-squared = 1.334 for 55 degrees of freedom
# Null hypothesis probability = 4.943542e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.451e-07 7.176e-08
25- 50 1.572e-06 1.334e-07
50-150 4.354e-06 5.002e-07
15-150 6.472e-06 6.646e-07
Peak spectrum fit
Power-law model
Time interval is from 4.360 sec. to 5.360 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.34269 ( -0.0904256 0.090571 )
Norm@50keV : 0.104394 ( -0.00600564 0.00600516 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 78.10 using 59 PHA bins.
# Reduced chi-squared = 1.370 for 57 degrees of freedom
# Null hypothesis probability = 3.322883e-02
Photon flux (15-150 keV) in 1 sec: 12.5577 ( -0.750218 0.751193 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.02127e-06 ( -6.29614e-08 6.30888e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 4.360 sec. to 5.360 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.367090 ( -0.452167 0.410965 )
Epeak [keV] : 91.8164 ( -13.7414 28.0406 )
Norm@50keV : 0.300305 ( -0.105438 0.180951 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.74 using 59 PHA bins.
# Reduced chi-squared = 1.067 for 56 degrees of freedom
# Null hypothesis probability = 3.415443e-01
Photon flux (15-150 keV) in 1 sec: 12.2134 ( -0.7625 0.7636 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.92118e-07 ( -6.6174e-08 6.5942e-08 ) ergs/cm2
Band function
Time interval is from 4.360 sec. to 5.360 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.321050 ( -0.435777 1.02187 )
beta : -2.38139 ( 2.38139 0.743924 )
Epeak [keV] : 88.9147 ( -32.963 30.7377 )
Norm@50keV : 0.318510 ( -0.119759 1.0171 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.74 using 59 PHA bins.
# Reduced chi-squared = 1.086 for 55 degrees of freedom
# Null hypothesis probability = 3.077260e-01
Photon flux (15-150 keV) in 1 sec: 12.2029 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 9.88493e-07 ( -9.88486e-07 -6.5473e-08 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 17.6813 (-1.12861 1.21246)
R^2/D10^2 : 0.892059 (-0.182535 0.226574)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 92.56 using 59 PHA bins.
# Reduced chi-squared = 1.624 for 57 degrees of freedom
# Null hypothesis probability = 2.017580e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.615e-08 6.035e-09
25- 50 2.562e-07 2.080e-08
50-150 5.786e-07 5.470e-08
15-150 8.910e-07 5.835e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 52.7594 (-3.04728 3.04692)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 85.12 using 59 PHA bins.
# Reduced chi-squared = 1.493 for 57 degrees of freedom
# Null hypothesis probability = 9.274472e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.314e-07 8.700e-09
25- 50 2.528e-07 1.680e-08
50-150 5.544e-07 1.224e-07
15-150 9.386e-07 1.256e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.97569 (-2.05571 2.79444)
R1^2/D10^2 : 6.00698 (-3.27066 9.23076)
kT2 [keV] : 24.6480 (-3.54798 7.46021)
R2^2/D10^2 : 0.226854 (-0.14953 0.112506)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.83 using 59 PHA bins.
# Reduced chi-squared = 1.070 for 55 degrees of freedom
# Null hypothesis probability = 3.372222e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.306e-08 3.206e-08
25- 50 2.559e-07 7.875e-08
50-150 6.444e-07 1.805e-07
15-150 9.933e-07 2.572e-07
Plot creation:
Thu Feb 12 09:01:18 EST 2015