batgrbproduct Analysis for Trigger=569992
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): Mon Sep 9 11:23:47 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger569992/batgroup_hand_proc
======================================================================
Trigger: 00569992 Segment: 000
BAT Trigger Time: 400282884.092 [s; MET]
Trigger Stop: 400282884.156 [s; MET]
UTC: 2013-09-07T21:41:13.086760 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 215.877573298739 Dec: 45.6161784400488 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.91
Image Trigger?: NO
Rate S/N Ratio: 18.8414436814168 [ if not an image trigger ]
Image S/N Ratio: 9.91
Flight Position: [ source = BAT ]
RA: 215.877573298739 Dec: 45.6161784400488 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 215.897785625475 Dec: 45.6022358745828 [deg; J2000]
{ 14h 23m 35.5s , +45d 36' 08.0" }
+/- 0.356716823559881 [arcmin] (estimated 90% radius based on SNR)
+/- 0.0839705567005145 [arcmin] (formal 1-sigma fit error)
SNR: 132.634378142227
Angular difference between Flight and Ground position is 1.191451 arcmin
Partial Coding Fraction: 1.03125 [ including projection effects ]
Duration
T90: 364.291999936104 +/- 5.22398471448131
Measured from: -41.0999999046326
to: 323.192000031471 [s; relative to TRIGTIME]
T50: 59.6959999203682 +/- 0.327438541184249
Measured from: 2.79200011491776
to: 62.4880000352859 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 57.6639999747276
to: 58.6639999747276 [s; relative to TRIGTIME]
Total Fluence
Measured from: -73.7360000014305
to: 767.388000011444 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 46.609256 70.415999 66.307184 20.899639
0.165875 0.182019 0.173063 0.145294 [error]
Peak 0.634256 1.119254 1.251257 0.408220
0.011279 0.014783 0.016300 0.012519 [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 1.24e-05 2.80e-05 4.99e-05 2.09e-04 1.36e-04 2.99e-04 erg/cm2
Error 3.34e-07 4.62e-07 4.90e-07 4.62e-06 1.36e-06 4.53e-06 erg/cm2
Peak flux Power-law 5.44e+00 7.59e+00 7.83e+00 1.48e+01 2.56e+01 3.57e+01 ph/cm2/s
Error 2.26e-01 1.86e-01 1.46e-01 6.41e-01 4.78e-01 6.94e-01 ph/cm2/s
Fluence Cutoff-PL 1.24e-05 2.80e-05 4.99e-05 2.08e-04 1.36e-04 2.98e-04 erg/cm2
Error 3.95e-07 4.11e-07 4.91e-07 5.56e-06 1.36e-06 5.21e-06 erg/cm2
Peak flux Cutoff-PL 5.39e+00 7.59e+00 7.86e+00 1.43e+01 2.55e+01 3.51e+01 ph/cm2/s
Error 2.75e-01 1.61e-01 1.91e-01 1.55e+00 3.54e-01 1.55e+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 1.167 0.019 - - 1.59e-02 1.95e-04 15.990 57
CPL 1.161 0.019 9999.4 0.0 1.60e-02 5.91e-04 15.980 56
The chi2 of BB fit is Chi-Squared Chi-Squared which shows a significant improvement in the fit over a PL.
Check the BB fit.
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.953 0.034 - - 2.22e-01 4.09e-03 62.880 57
CPL 0.885 0.108 1008.3 0.0 2.37e-01 1.95e-02 62.150 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: 280.448000 sec.
T50 in the 50-300 keV band: 56.704000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 841.124 -73.736 767.388
T90 364.292 -41.100 323.192
T50 59.696 2.792 62.488
Peak 1.000 57.664 58.664
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
215.8978 45.6022 0.0015 9.2407 -156.9223 61.5902499 132.634 TRIG_00569992
Foreground time interval of the image:
-14.691 17.109 (delta_t = 31.800 [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
-73.736000 -17.612000
-16.092000 572.128000
572.908000 630.138000
630.908000 658.608000
659.908000 678.088000
678.908000 679.468000
680.908000 767.388000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.16702 ( -0.0190477 0.0189539 )
Norm@50keV : 1.59088E-02 ( -0.000195471 0.000194685 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 15.99 using 59 PHA bins.
# Reduced chi-squared = 0.2805 for 57 degrees of freedom
# Null hypothesis probability = 1.000000e+00
Photon flux (15-150 keV) in 834.5 sec: 1.85916 ( -0.0256588 0.0257841 ) ph/cm2/s
Energy fluence (15-150 keV) : 0.000135977 ( -1.35619e-06 1.35643e-06 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-73.736000 -17.612000
-16.092000 572.128000
572.908000 630.138000
630.908000 658.608000
659.908000 678.088000
678.908000 679.468000
680.908000 767.388000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.16110 ( -0.0192884 0.0190378 )
Epeak [keV] : 9999.35 ( -9999.36 -9999.36 )
Norm@50keV : 1.59860E-02 ( -0.000184372 0.000996727 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 15.98 using 59 PHA bins.
# Reduced chi-squared = 0.2854 for 56 degrees of freedom
# Null hypothesis probability = 1.000000e+00
Photon flux (15-150 keV) in 834.5 sec: 1.85816 ( -0.02607 0.02529 ) ph/cm2/s
Energy fluence (15-150 keV) : 0.000136041 ( -1.3569e-06 1.36024e-06 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-73.736000 -17.612000
-16.092000 572.128000
572.908000 630.138000
630.908000 658.608000
659.908000 678.088000
678.908000 679.468000
680.908000 767.388000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.775493 ( 0.775478 5.73303 )
beta : -1.16751 ( -0.0196907 0.0193306 )
Epeak [keV] : 72.9232 ( -72.7976 -72.7976 )
Norm@50keV : 3.17452E-02 ( -0.0167945 613548 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 15.94 using 59 PHA bins.
# Reduced chi-squared = 0.2898 for 55 degrees of freedom
# Null hypothesis probability = 9.999999e-01
Photon flux (15-150 keV) in 834.5 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] : 26.8826 ( )
R^2/D10^2 : 3.26204E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 1711.69 using 59 PHA bins.
# Reduced chi-squared = 30.0296 for 57 degrees of freedom
# Null hypothesis probability = 1.613618e-320
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.284e-06 7.594e-08
25- 50 1.930e-05 3.714e-07
50-150 1.020e-04 1.127e-06
15-150 1.246e-04 1.293e-06
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 8.89772 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 1916.61 using 59 PHA bins.
# Reduced chi-squared = 33.6247 for 57 degrees of freedom
# Null hypothesis probability = 0.000000e+00
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.849e-05 2.420e-07
25- 50 3.557e-05 4.256e-07
50-150 7.800e-05 1.018e-06
15-150 1.321e-04 1.711e-06
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.93208 (-0.423247 0.441933)
R1^2/D10^2 : 0.690341 (-0.105639 0.128697)
kT2 [keV] : 38.1310 (-1.28203 1.44173)
R2^2/D10^2 : 9.17585E-03 (-0.0010612 0.00111388)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 35.69 using 59 PHA bins.
# Reduced chi-squared = 0.6490 for 55 degrees of freedom
# Null hypothesis probability = 9.797914e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.040e-05 5.132e-07
25- 50 2.871e-05 6.008e-07
50-150 9.689e-05 1.252e-06
15-150 1.360e-04 1.669e-06
Peak spectrum fit
Power-law model
Time interval is from 57.664 sec. to 58.664 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.953357 ( -0.03407 0.0339716 )
Norm@50keV : 0.222426 ( -0.00409114 0.00408067 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.88 using 59 PHA bins.
# Reduced chi-squared = 1.103 for 57 degrees of freedom
# Null hypothesis probability = 2.759938e-01
Photon flux (15-150 keV) in 1 sec: 25.5572 ( -0.477808 0.47827 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.44622e-06 ( -4.62475e-08 4.62379e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 57.664 sec. to 58.664 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.885379 ( -0.138714 0.0782432 )
Epeak [keV] : 1008.27 ( -1012.99 -1012.99 )
Norm@50keV : 0.237351 ( -0.00791386 0.0310485 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.15 using 59 PHA bins.
# Reduced chi-squared = 1.110 for 56 degrees of freedom
# Null hypothesis probability = 2.664302e-01
Photon flux (15-150 keV) in 1 sec: 25.5166 ( -0.4614 0.2465 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.44171e-06 ( 0 0 ) ergs/cm2
Band function
Time interval is from 57.664 sec. to 58.664 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.811625 ( 0.811616 0.811616 )
beta : -0.953357 ( -0.0339671 0.0340767 )
Epeak [keV] : 41.9111 ( )
Norm@50keV : 0.355214 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.88 using 59 PHA bins.
# Reduced chi-squared = 1.143 for 55 degrees of freedom
# Null hypothesis probability = 2.173886e-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] : 24.6429 ( )
R^2/D10^2 : 0.646596 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 519.36 using 59 PHA bins.
# Reduced chi-squared = 9.1116 for 57 degrees of freedom
# Null hypothesis probability = 8.099829e-76
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.873e-08 2.570e-09
25- 50 3.871e-07 9.500e-09
50-150 1.746e-06 4.800e-08
15-150 2.202e-06 4.650e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 107.348 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 952.01 using 59 PHA bins.
# Reduced chi-squared = 16.702 for 57 degrees of freedom
# Null hypothesis probability = 1.495512e-162
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.673e-07 5.200e-09
25- 50 5.142e-07 9.350e-09
50-150 1.128e-06 2.050e-08
15-150 1.909e-06 3.550e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.25947 (-0.770066 0.852444)
R1^2/D10^2 : 9.93627 (-2.6441 3.83171)
kT2 [keV] : 36.7808 (-2.40239 3.02222)
R2^2/D10^2 : 0.169927 (-0.0366091 0.0399775)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.45 using 59 PHA bins.
# Reduced chi-squared = 1.226 for 55 degrees of freedom
# Null hypothesis probability = 1.208747e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.569e-07 1.190e-08
25- 50 4.409e-07 1.810e-08
50-150 1.863e-06 7.250e-08
15-150 2.460e-06 8.000e-08
Plot creation:
Mon Sep 9 12:16:51 EDT 2013