batgrbproduct Analysis for Trigger=586680
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): Sat Feb 15 16:30:37 EST 2014
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger586680/GCN5_download_cron
======================================================================
Trigger: 00586680 Segment: 000
BAT Trigger Time: 414130041.92 [s; MET]
Trigger Stop: 414130042.944 [s; MET]
UTC: 2014-02-15T04:07:10.273340 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 104.135942727015 Dec: 41.7803604777544 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 12.63
Image Trigger?: NO
Rate S/N Ratio: 58.6344608570762 [ if not an image trigger ]
Image S/N Ratio: 12.63
Flight Position: [ source = BAT ]
RA: 104.135942727015 Dec: 41.7803604777544 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 104.128306954348 Dec: 41.7869932625591 [deg; J2000]
{ 06h 56m 30.8s , +41d 47' 13.2" }
+/- 1.12303265028592 [arcmin] (estimated 90% radius based on SNR)
+/- 0.503182725053649 [arcmin] (formal 1-sigma fit error)
SNR: 25.7708807699441
Angular difference between Flight and Ground position is 0.524485 arcmin
Partial Coding Fraction: 0.1542969 [ including projection effects ]
Duration
T90: 743.271999955177 +/- 48.2402315851806
Measured from: 0.192000091075897
to: 743.464000046253 [s; relative to TRIGTIME]
T50: 431.635999917984 +/- 46.4323559934496
Measured from: 5.15200012922287
to: 436.788000047207 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.188000023365021
to: 0.811999976634979 [s; relative to TRIGTIME]
Total Fluence
Measured from: -1.10000002384186
to: 826.611999988556 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.984118 3.331106 2.944454 1.639856
0.215473 0.233970 0.210720 0.198471 [error]
Peak 0.151920 0.305028 0.385125 0.146991
0.020880 0.027319 0.030153 0.023442 [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 6.71e-07 1.49e-06 2.60e-06 1.06e-05 7.10e-06 1.53e-05 erg/cm2
Error 1.02e-07 1.33e-07 2.06e-07 1.97e-06 5.29e-07 2.05e-06 erg/cm2
Peak flux Power-law 1.62e+00 2.33e+00 2.49e+00 4.94e+00 7.96e+00 1.14e+01 ph/cm2/s
Error 2.89e-01 2.59e-01 2.25e-01 9.37e-01 7.09e-01 1.09e+00 ph/cm2/s
Fluence Cutoff-PL 6.83e-07 1.50e-06 2.59e-06 1.04e-05 7.07e-06 1.51e-05 erg/cm2
Error 1.03e-07 1.32e-07 2.06e-07 2.09e-06 5.27e-07 2.46e-06 erg/cm2
Peak flux Cutoff-PL 1.53e+00 2.36e+00 2.57e+00 4.01e+00 7.94e+00 1.05e+01 ph/cm2/s
Error 3.43e-01 2.77e-01 2.94e-01 1.56e+00 7.11e-01 1.77e+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 1.196 0.131 - - 8.46e-04 6.10e-05 93.940 57
CPL 1.193 0.139 9999.3 0.0 8.50e-04 1.34e-04 93.990 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.903 0.144 - - 6.94e-02 6.16e-03 51.760 57
CPL 0.686 0.432 361.2 0.0 8.64e-02 4.30e-02 51.260 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: 644.992000 sec.
T50 in the 50-300 keV band: 155.648000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 827.712 -1.100 826.612
T90 743.272 0.192 743.464
T50 431.636 5.152 436.788
Peak 1.000 -0.188 0.812
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
104.1283 +41.7870 0.0074 46.6 155.7 7.7165 25.8 TRIG_00586680
------------------------------------------
Foreground time interval of the image:
-1.100 12.781 (delta_t = 13.881 [sec])
Background time interval of the image:
-239.920 -1.100 (delta_t = 238.820 [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
Multiple GTIs in the spectrum
tstart tstop
-1.100000 824.490000
826.080000 826.612000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.19574 ( -0.132294 0.129109 )
Norm@50keV : 8.45834E-04 ( -6.11078e-05 6.09113e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 93.94 using 59 PHA bins.
# Reduced chi-squared = 1.648 for 57 degrees of freedom
# Null hypothesis probability = 1.496464e-03
Photon flux (15-150 keV) in 826.1 sec: 9.92245E-02 ( -0.00768822 0.00771355 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.09756e-06 ( -5.27856e-07 5.29751e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-1.100000 824.490000
826.080000 826.612000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.19303 ( -0.149041 0.128448 )
Epeak [keV] : 9999.33 ( -9999.36 -9999.36 )
Norm@50keV : 8.50021E-04 ( -6.04771e-05 0.00020732 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 93.99 using 59 PHA bins.
# Reduced chi-squared = 1.678 for 56 degrees of freedom
# Null hypothesis probability = 1.112582e-03
Photon flux (15-150 keV) in 826.1 sec: 9.95284E-02 ( -0.0079377 0.0074126 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.07297e-06 ( -5.08192e-07 5.45953e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-1.100000 824.490000
826.080000 826.612000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.95260 ( -4.9526 -4.9526 )
beta : -1.24560 ( -0.144099 0.142858 )
Epeak [keV] : 25.6690 ( -25.669 5.08007 )
Norm@50keV : 53.8083 ( -3.80319 205069 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 92.21 using 59 PHA bins.
# Reduced chi-squared = 1.677 for 55 degrees of freedom
# Null hypothesis probability = 1.242021e-03
Photon flux (15-150 keV) in 826.1 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] : 20.4299 ( )
R^2/D10^2 : 4.11061E-03 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 158.95 using 59 PHA bins.
# Reduced chi-squared = 2.7887 for 57 degrees of freedom
# Null hypothesis probability = 1.451932e-11
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.709e-07 4.308e-08
25- 50 1.368e-06 1.660e-07
50-150 4.245e-06 5.258e-07
15-150 5.884e-06 5.283e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 0.423655 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 120.17 using 59 PHA bins.
# Reduced chi-squared = 2.1082 for 57 degrees of freedom
# Null hypothesis probability = 2.083694e-06
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.715e-07 7.889e-08
25- 50 1.676e-06 1.574e-07
50-150 3.677e-06 1.103e-06
15-150 6.225e-06 1.214e-06
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.50308 (-1.7111 1.89969)
R1^2/D10^2 : 3.93376E-02 (-0.0170851 0.0341806)
kT2 [keV] : 63.1508 (-24.2158 -65.3746)
R2^2/D10^2 : 1.28890E-04 (-7.7267e-05 0.000268796)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 87.12 using 59 PHA bins.
# Reduced chi-squared = 1.584 for 55 degrees of freedom
# Null hypothesis probability = 3.759666e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.246e-07 1.760e-07
25- 50 1.645e-06 3.845e-07
50-150 4.958e-06 2.324e-06
15-150 7.228e-06 2.609e-06
Peak spectrum fit
Power-law model
Time interval is from -0.188 sec. to 0.812 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.903295 ( -0.14556 0.141614 )
Norm@50keV : 6.93610E-02 ( -0.00617272 0.00613904 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.76 using 59 PHA bins.
# Reduced chi-squared = 0.9081 for 57 degrees of freedom
# Null hypothesis probability = 6.712261e-01
Photon flux (15-150 keV) in 1 sec: 7.96134 ( -0.708749 0.709417 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.77434e-07 ( -7.16478e-08 7.17531e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.188 sec. to 0.812 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.685704 ( -0.5759 0.287658 )
Epeak [keV] : 361.183 ( -361.175 -361.175 )
Norm@50keV : 8.64385E-02 ( -0.0220141 0.0640076 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.26 using 59 PHA bins.
# Reduced chi-squared = 0.9153 for 56 degrees of freedom
# Null hypothesis probability = 6.546342e-01
Photon flux (15-150 keV) in 1 sec: 7.93635 ( -0.7106 0.7115 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.7571e-07 ( -7.2704e-08 7.2491e-08 ) ergs/cm2
Band function
Time interval is from -0.188 sec. to 0.812 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -5 -5 )
beta : -1.01646 ( -0.170897 0.166786 )
Epeak [keV] : 30.9206 ( -6.96794 5.07084 )
Norm@50keV : 1341.33 ( -120.219 4402.47 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.53 using 59 PHA bins.
# Reduced chi-squared = 0.8459 for 55 degrees of freedom
# Null hypothesis probability = 7.849873e-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] : 24.6392 (-2.80366 3.34973)
R^2/D10^2 : 0.211278 (-0.0683655 0.0958045)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.05 using 59 PHA bins.
# Reduced chi-squared = 1.317 for 57 degrees of freedom
# Null hypothesis probability = 5.477462e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.245e-08 4.070e-09
25- 50 1.264e-07 1.690e-08
50-150 5.703e-07 7.275e-08
15-150 7.192e-07 8.275e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 31.0149 (-2.93695 2.93827)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 105.18 using 59 PHA bins.
# Reduced chi-squared = 1.8453 for 57 degrees of freedom
# Null hypothesis probability = 1.075781e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.804e-08 1.493e-08
25- 50 1.501e-07 7.003e-08
50-150 3.293e-07 1.699e-07
15-150 5.574e-07 2.748e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.24071 (-2.15698 3.39809)
R1^2/D10^2 : 3.26157 (-2.06712 5.56977)
kT2 [keV] : 38.2012 (-8.1336 20.0495)
R2^2/D10^2 : 4.89028E-02 (-0.0339493 0.0537524)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.53 using 59 PHA bins.
# Reduced chi-squared = 0.8824 for 55 degrees of freedom
# Null hypothesis probability = 7.184904e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.042e-08 2.252e-08
25- 50 1.393e-07 4.989e-08
50-150 5.991e-07 2.338e-07
15-150 7.889e-07 3.259e-07
Plot creation:
Sat Feb 15 17:07:06 EST 2014