batgrbproduct Analysis for Trigger=575707
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 Oct 24 21:26:21 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger575707/GCN5_download_cron
======================================================================
Trigger: 00575707 Segment: 000
BAT Trigger Time: 404310392 [s; MET]
Trigger Stop: 404310456 [s; MET]
UTC: 2013-10-24T12:26:20.810860 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 290.4635354555 Dec: -64.6025301330274 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.5
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 8.5
Flight Position: [ source = BAT ]
RA: 290.4635354555 Dec: -64.6025301330274 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 290.543228517844 Dec: -64.5987429548898 [deg; J2000]
{ 19h 22m 10.4s , -64d 35' 55.5" }
+/- 2.02122505879968 [arcmin] (estimated 90% radius based on SNR)
+/- 0.935010620778417 [arcmin] (formal 1-sigma fit error)
SNR: 11.1307899875869
Angular difference between Flight and Ground position is 2.063491 arcmin
Partial Coding Fraction: 0.7890625 [ including projection effects ]
Duration
T90: 112 +/- 35.7770876399966
Measured from: -110.999999880791
to: 1.00000011920929 [s; relative to TRIGTIME]
T50: 64 +/- 16
Measured from: -78.9999998807907
to: -14.9999998807907 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -55.5
to: -54.5 [s; relative to TRIGTIME]
Total Fluence
Measured from: -111
to: 17 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.707755 0.907605 0.484395 0.082855
0.076176 0.073533 0.062528 0.055148 [error]
Peak 0.000746 0.021001 0.008006 -0.000859
0.005696 0.005550 0.004715 0.004010 [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 2.37e-07 3.52e-07 3.90e-07 8.18e-07 1.23e-06 1.80e-06 erg/cm2
Error 3.46e-08 3.40e-08 6.12e-08 2.60e-07 1.41e-07 3.21e-07 erg/cm2
Peak flux Power-law 6.86e-02 8.22e-02 7.13e-02 1.06e-01 2.59e-01 3.28e-01 ph/cm2/s
Error 5.52e-02 4.44e-02 3.66e-02 1.26e-01 1.25e-01 1.59e-01 ph/cm2/s
Fluence Cutoff-PL 2.28e-07 3.68e-07 3.85e-07 4.07e-07 1.17e-06 1.39e-06 erg/cm2
Error 3.81e-08 4.58e-08 6.77e-08 4.88e-07 1.71e-07 5.09e-07 erg/cm2
Peak flux Cutoff-PL 2.79e-02 1.64e-01 3.14e-02 1.12e-05 2.23e-01 2.23e-01 ph/cm2/s
Error 3.03e-02 6.93e-02 4.79e-02 9.49e-03 8.99e-02 8.99e-02 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 1.849 0.181 - - 1.04e-03 1.19e-04 54.180 57
CPL 1.465 0.774 59.4 0.0 1.72e-03 0.00e+00 53.330 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.213 0.755 - - 2.21e-03 1.04e-03 61.290 57
CPL -9.958 0.000 41.2 14.7 7.23e+03 2.63e+04 56.240 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: 71.872000 sec.
T50 in the 50-300 keV band: 39.552000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 128.000 -111.000 17.000
T90 112.000 -111.000 1.000
T50 64.000 -79.000 -15.000
Peak 1.000 -55.500 -54.500
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
290.5432 -64.5987 0.0173 21.2 -58.6 0.6808 11.1 TRIG_00575707
------------------------------------------
Foreground time interval of the image:
-13.699 17.000 (delta_t = 30.699 [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
Time interval is from -111.000 sec. to 17.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.84939 ( -0.177846 0.183932 )
Norm@50keV : 1.04215E-03 ( -0.000119812 0.000117628 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.18 using 59 PHA bins.
# Reduced chi-squared = 0.9505 for 57 degrees of freedom
# Null hypothesis probability = 5.815636e-01
Photon flux (15-150 keV) in 128 sec: 0.146448 ( -0.0142588 0.0142675 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.22655e-06 ( -1.39889e-07 1.42451e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -111.000 sec. to 17.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.46516 ( -0.85369 0.693952 )
Epeak [keV] : 59.3523 ( )
Norm@50keV : 1.72478E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.33 using 59 PHA bins.
# Reduced chi-squared = 0.9523 for 56 degrees of freedom
# Null hypothesis probability = 5.765562e-01
Photon flux (15-150 keV) in 128 sec: 0.143939 ( -0.014996 0.014957 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.17312e-06 ( -1.69006e-07 1.72134e-07 ) ergs/cm2
Band function
Time interval is from -111.000 sec. to 17.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.87918 ( -2.97211 0.585721 )
beta : -2.05902 ( 9.37167 19.3717 )
Epeak [keV] : 28.3133 ( -35.867 34.5644 )
Norm@50keV : 0.479800 ( -0.471076 48.4937 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.28 using 59 PHA bins.
# Reduced chi-squared = 0.9324 for 55 degrees of freedom
# Null hypothesis probability = 6.173731e-01
Photon flux (15-150 keV) in 128 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] : 10.3052 (-1.14784 1.33763)
R^2/D10^2 : 6.08243E-02 (-0.0226433 0.0347827)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.64 using 59 PHA bins.
# Reduced chi-squared = 1.274 for 57 degrees of freedom
# Null hypothesis probability = 7.921539e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.700e-07 2.925e-08
25- 50 4.408e-07 5.299e-08
50-150 2.508e-07 6.176e-08
15-150 8.616e-07 1.155e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 86.2493 (-25.2837 46.3928)
Norm : 0.670646 (-0.0936784 0.115368)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.39 using 59 PHA bins.
# Reduced chi-squared = 0.9366 for 57 degrees of freedom
# Null hypothesis probability = 6.113663e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.236e-07 3.315e-08
25- 50 3.747e-07 3.923e-08
50-150 5.556e-07 2.301e-07
15-150 1.154e-06 2.588e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.31078 (-1.5811 1.53668)
R1^2/D10^2 : 0.176637 (-0.0849871 0.220905)
kT2 [keV] : 29.7540 (-11.1665 41.5766)
R2^2/D10^2 : 8.03397E-04 (-0.000729197 0.0030046)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.87 using 59 PHA bins.
# Reduced chi-squared = 0.9250 for 55 degrees of freedom
# Null hypothesis probability = 6.329732e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.169e-07 6.013e-08
25- 50 3.895e-07 1.295e-07
50-150 6.104e-07 3.200e-07
15-150 1.217e-06 4.426e-07
Peak spectrum fit
Power-law model
Time interval is from -55.500 sec. to -54.500 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.21300 ( -0.794264 0.715981 )
Norm@50keV : 2.20707E-03 ( -0.00104121 0.0010392 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.29 using 59 PHA bins.
# Reduced chi-squared = 1.075 for 57 degrees of freedom
# Null hypothesis probability = 3.249438e-01
Photon flux (15-150 keV) in 1 sec: 0.259236 ( -0.122339 0.126896 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.23438e-08 ( -1.09316e-08 1.13149e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -55.500 sec. to -54.500 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -9.95817 ( )
Epeak [keV] : 41.1927 ( -6.39087 23.0367 )
Norm@50keV : 7228.77 ( -7749.98 44819.9 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.24 using 59 PHA bins.
# Reduced chi-squared = 1.004 for 56 degrees of freedom
# Null hypothesis probability = 4.656914e-01
Photon flux (15-150 keV) in 1 sec: 0.223255 ( -0.089446 0.090323 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.34654e-08 ( -5.37943e-09 7.9056e-09 ) ergs/cm2
Band function
Time interval is from -55.500 sec. to -54.500 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -4.54718 -5 )
beta : -2.73691 ( 2.75552 1.50739 )
Epeak [keV] : 43.6713 ( -11.0901 14.3072 )
Norm@50keV : 10.3181 ( -4.10308 43.8551 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.51 using 59 PHA bins.
# Reduced chi-squared = 1.027 for 55 degrees of freedom
# Null hypothesis probability = 4.183624e-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] : 14.6330 (-4.90182 10.6046)
R^2/D10^2 : 3.81453E-02 (-0.0381453 0.12199)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.86 using 59 PHA bins.
# Reduced chi-squared = 1.033 for 57 degrees of freedom
# Null hypothesis probability = 4.073478e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.717e-09 1.145e-09
25- 50 6.664e-09 4.414e-09
50-150 9.602e-09 6.830e-09
15-150 1.798e-08 1.167e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-199.363 -199.363)
Norm : 1.09947 (-0.52141 0.521421)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.45 using 59 PHA bins.
# Reduced chi-squared = 1.078 for 57 degrees of freedom
# Null hypothesis probability = 3.198278e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.738e-09 1.858e-09
25- 50 5.267e-09 3.603e-09
50-150 1.155e-08 7.490e-09
15-150 1.955e-08 1.312e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.93797E-02 (0.822496 -0.0693797)
R1^2/D10^2 : 5.92296E+21 (-5.92296e+21 -5.92296e+21)
kT2 [keV] : 14.6330 (-4.90182 10.6046)
R2^2/D10^2 : 3.81454E-02 (-0.0381454 0.121993)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.86 using 59 PHA bins.
# Reduced chi-squared = 1.070 for 55 degrees of freedom
# Null hypothesis probability = 3.362480e-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:
Thu Oct 24 21:58:37 EDT 2013