batgrbproduct Analysis for Trigger=590310
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 Mar 5 10:38:51 EST 2014
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger590310/GCN5_download_cron
======================================================================
Trigger: 00590310 Segment: 000
BAT Trigger Time: 415647198.016 [s; MET]
Trigger Stop: 415647199.04 [s; MET]
UTC: 2014-03-04T17:33:06.297660 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 266.123211618556 Dec: -28.7383746169961 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 24.3
Image Trigger?: NO
Rate S/N Ratio: 110.417389934738 [ if not an image trigger ]
Image S/N Ratio: 24.3
Flight Position: [ source = BAT ]
RA: 266.123211618556 Dec: -28.7383746169961 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 266.125400783808 Dec: -28.7373352152276 [deg; J2000]
{ 17h 44m 30.1s , -28d 44' 14.4" }
+/- 0.70724879823291 [arcmin] (estimated 90% radius based on SNR)
+/- 0.243054136759021 [arcmin] (formal 1-sigma fit error)
SNR: 49.8901961203935
Angular difference between Flight and Ground position is 0.130972 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 8.7039999961853 +/- 1.30789602398356
Measured from: -1.61599987745285
to: 7.08800011873245 [s; relative to TRIGTIME]
T50: 3.07199996709824 +/- 0.329387257333806
Measured from: -0.0439998507499695
to: 3.02800011634827 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.0879999995231628
to: 0.912000000476837 [s; relative to TRIGTIME]
Total Fluence
Measured from: -2.35199999809265
to: 12.6000000238419 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.971769 0.786240 0.047831 -0.001702
0.028492 0.022954 0.016462 0.013410 [error]
Peak 0.490211 0.209043 0.007967 0.001192
0.010518 0.007692 0.004315 0.003562 [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 6.78e-07 2.90e-07 7.36e-08 2.30e-08 1.06e-06 1.06e-06 erg/cm2
Error 4.04e-08 1.43e-08 8.60e-09 4.87e-09 4.55e-08 4.54e-08 erg/cm2
Peak flux Power-law 5.66e+00 1.41e+00 1.83e-01 2.66e-02 7.26e+00 7.27e+00 ph/cm2/s
Error 3.81e-01 8.00e-02 2.34e-02 5.98e-03 4.10e-01 4.09e-01 ph/cm2/s
Fluence Cutoff-PL 5.93e-07 3.07e-07 1.87e-08 4.21e-11 9.18e-07 9.18e-07 erg/cm2
Error 4.83e-08 1.66e-08 8.07e-09 1.10e-10 5.37e-08 5.37e-08 erg/cm2
Peak flux Cutoff-PL 4.84e+00 1.59e+00 4.88e-02 3.87e-05 6.48e+00 6.48e+00 ph/cm2/s
Error 4.50e-01 9.84e-02 2.15e-02 1.11e-04 4.60e-01 4.60e-01 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 3.977 0.120 - - 3.26e-03 2.84e-04 99.990 57
CPL 1.000 0.000 50.0 0.0 1.45e-02 0.00e+00 884.290 56
The chi2 of BB fit is 55.36 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 3.945 0.131 - - 1.24e-02 1.24e-03 109.930 57
CPL 1.000 0.000 50.0 0.0 4.95e-02 0.00e+00 730.580 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 14.952 -2.352 12.600
T90 8.704 -1.616 7.088
T50 3.072 -0.044 3.028
Peak 1.000 -0.088 0.912
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
266.1254 -28.7373 0.0039 5.1 155.2 2.4313 49.9 TRIG_00590310
------------------------------------------
Foreground time interval of the image:
-2.352 12.600 (delta_t = 14.952 [sec])
Background time interval of the image:
-119.016 -2.352 (delta_t = 116.664 [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 -2.352 sec. to 12.600 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.97679 ( -0.11903 0.121271 )
Norm@50keV : 3.25837E-03 ( -0.000280197 0.000288467 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 99.99 using 59 PHA bins.
# Reduced chi-squared = 1.754 for 57 degrees of freedom
# Null hypothesis probability = 3.775131e-04
Photon flux (15-150 keV) in 14.95 sec: 1.96921 ( -0.0986635 0.0996182 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.05514e-06 ( -4.54375e-08 4.55504e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -2.352 sec. to 12.600 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 1.45247E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 884.29 using 59 PHA bins.
# Reduced chi-squared = 15.791 for 56 degrees of freedom
# Null hypothesis probability = 2.514207e-149
Photon flux (15-150 keV) in 14.95 sec: 1.73478 ( -0.11697 0.11708 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.18435e-07 ( -5.35838e-08 5.37662e-08 ) ergs/cm2
Band function
Time interval is from -2.352 sec. to 12.600 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.764076 ( -1.6041 2.10349 )
beta : -5.29982 ( -1.24082 0.522219 )
Epeak [keV] : 15.9722 ( -6.00875 0.885172 )
Norm@50keV : 7.72603 ( -7.72771 486.977 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.75 using 59 PHA bins.
# Reduced chi-squared = 0.8137 for 55 degrees of freedom
# Null hypothesis probability = 8.366598e-01
Photon flux (15-150 keV) in 14.95 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] : 4.71236 (-0.17728 0.184887)
R^2/D10^2 : 19.0427 (-3.83299 4.83292)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.36 using 59 PHA bins.
# Reduced chi-squared = 0.9712 for 57 degrees of freedom
# Null hypothesis probability = 5.369435e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.429e-07 3.902e-08
25- 50 3.055e-07 1.772e-08
50-150 9.246e-09 1.932e-09
15-150 8.577e-07 4.679e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 11.0836 (-0.685922 0.75041)
Norm : 52.0587 (-7.48246 8.79893)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.60 using 59 PHA bins.
# Reduced chi-squared = 0.8878 for 57 degrees of freedom
# Null hypothesis probability = 7.122363e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.213e-07 4.037e-08
25- 50 3.054e-07 1.742e-08
50-150 2.742e-08 4.799e-09
15-150 9.541e-07 4.485e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.20800 (-0.995162 0.422745)
R1^2/D10^2 : 31.6150 (-11.3272 43.282)
kT2 [keV] : 9.04939 (-5.83382 12.9321)
R2^2/D10^2 : 0.147845 (-0.145975 5.69417)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.30 using 59 PHA bins.
# Reduced chi-squared = 0.8236 for 55 degrees of freedom
# Null hypothesis probability = 8.215357e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.820e-07 1.153e-07
25- 50 3.033e-07 8.510e-08
50-150 3.311e-08 1.755e-08
15-150 9.184e-07 2.208e-07
Peak spectrum fit
Power-law model
Time interval is from -0.088 sec. to 0.912 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.94452 ( -0.129191 0.133137 )
Norm@50keV : 1.23613E-02 ( -0.0012246 0.00125858 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 109.93 using 59 PHA bins.
# Reduced chi-squared = 1.9285 for 57 degrees of freedom
# Null hypothesis probability = 3.240798e-05
Photon flux (15-150 keV) in 1 sec: 7.26374 ( -0.408791 0.411332 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.61601e-07 ( -1.31673e-08 1.31773e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.088 sec. to 0.912 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 4.94850E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 730.58 using 59 PHA bins.
# Reduced chi-squared = 13.046 for 56 degrees of freedom
# Null hypothesis probability = 3.504209e-118
Photon flux (15-150 keV) in 1 sec: 6.48448 ( -0.45923 0.4603 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.31414e-07 ( -1.427e-08 1.4298e-08 ) ergs/cm2
Band function
Time interval is from -0.088 sec. to 0.912 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.166185 ( -0.625355 2.98216 )
beta : -8.54434 ( 8.53969 3.63112 )
Epeak [keV] : 15.0484 ( -4.89679 0.809032 )
Norm@50keV : 9.33626 ( -5.03938 1702.63 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.34 using 59 PHA bins.
# Reduced chi-squared = 0.9880 for 55 degrees of freedom
# Null hypothesis probability = 4.997376e-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] : 4.77275 (-0.201814 0.21038)
R^2/D10^2 : 68.6411 (-14.9782 19.3569)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.67 using 59 PHA bins.
# Reduced chi-squared = 1.029 for 57 degrees of freedom
# Null hypothesis probability = 4.139856e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.381e-07 1.040e-08
25- 50 8.025e-08 5.750e-09
50-150 2.592e-09 6.845e-10
15-150 2.209e-07 1.310e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 11.3416 (-0.776157 0.85032)
Norm : 188.359 (-28.7337 34.2349)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.91 using 59 PHA bins.
# Reduced chi-squared = 1.051 for 57 degrees of freedom
# Null hypothesis probability = 3.705397e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.559e-07 1.120e-08
25- 50 7.881e-08 4.795e-09
50-150 7.493e-09 1.641e-09
15-150 2.422e-07 1.340e-08
Double BB
R1^2/D10^2 : 141.993 (-71.1314 64984.1)
kT2 [keV] : 5.98510 ( )
R2^2/D10^2 : 10.8450 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.20 using 59 PHA bins.
#Fit statistic : Chi-Squared = 54.14 using 59 PHA bins.
#Fit statistic : Chi-Squared = 54.12 using 59 PHA bins.
# Reduced chi-squared = 0.9854 for 55 degrees of freedom
# Reduced chi-squared = 0.9844 for 55 degrees of freedom
# Reduced chi-squared = 0.9840 for 55 degrees of freedom
# Null hypothesis probability = 5.052729e-01
# Null hypothesis probability = 5.074366e-01
# Null hypothesis probability = 5.083204e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.459e-07 8.396e-08
25- 50 7.969e-08 4.974e-08
50-150 5.447e-09 3.432e-09
15-150 2.311e-07 1.354e-07
Plot creation:
Wed Mar 5 10:49:13 EST 2014