batgrbproduct Analysis for Trigger=584136
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 Jan 18 21:05:23 EST 2014
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger584136/GCN5_download_cron
======================================================================
Trigger: 00584136 Segment: 000
BAT Trigger Time: 411701534.272 [s; MET]
Trigger Stop: 411701538.368 [s; MET]
UTC: 2014-01-18T01:32:02.739660 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 331.002867245394 Dec: -17.9476181313747 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.36
Image Trigger?: NO
Rate S/N Ratio: 13.2664991614216 [ if not an image trigger ]
Image S/N Ratio: 10.36
Flight Position: [ source = BAT ]
RA: 331.002867245394 Dec: -17.9476181313747 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 330.999099415549 Dec: -17.9372443791183 [deg; J2000]
{ 22h 03m 59.8s , -17d 56' 14.1" }
+/- 1.48470822110367 [arcmin] (estimated 90% radius based on SNR)
+/- 0.722729069267398 [arcmin] (formal 1-sigma fit error)
SNR: 17.2948495963091
Angular difference between Flight and Ground position is 0.658537 arcmin
Partial Coding Fraction: 0.4101562 [ including projection effects ]
Duration
T90: 84.1519999504089 +/- 10.7906191056356
Measured from: -61.0759999155998
to: 23.0760000348091 [s; relative to TRIGTIME]
T50: 23.2919999361038 +/- 16.0835047376911
Measured from: -15.3879998922348
to: 7.90400004386902 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 2.98399996757507
to: 3.98399996757507 [s; relative to TRIGTIME]
Total Fluence
Measured from: -73.6080000400543
to: 30.8679999709129 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.409085 1.729051 0.982040 0.244648
0.100050 0.103507 0.091150 0.083992 [error]
Peak 0.070147 0.084041 0.055037 0.014842
0.010753 0.011165 0.009981 0.008534 [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 5.04e-07 7.42e-07 8.13e-07 1.67e-06 2.57e-06 3.73e-06 erg/cm2
Error 5.54e-08 5.27e-08 9.08e-08 3.81e-07 2.10e-07 4.69e-07 erg/cm2
Peak flux Power-law 7.24e-01 6.45e-01 3.95e-01 3.67e-01 1.92e+00 2.13e+00 ph/cm2/s
Error 1.68e-01 9.62e-02 8.24e-02 1.52e-01 2.84e-01 3.16e-01 ph/cm2/s
Fluence Cutoff-PL 4.73e-07 7.87e-07 8.10e-07 7.10e-07 2.44e-06 2.78e-06 erg/cm2
Error 6.44e-08 7.06e-08 9.95e-08 4.75e-07 2.46e-07 7.27e-07 erg/cm2
Peak flux Cutoff-PL 7.19e-01 6.49e-01 3.97e-01 3.45e-01 1.92e+00 2.11e+00 ph/cm2/s
Error 1.40e-01 1.08e-01 8.65e-02 2.22e-01 2.87e-01 3.62e-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 2.05e+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 1.867 0.132 - - 2.68e-03 2.18e-04 42.030 57
CPL 1.326 0.592 55.5 280.0 5.30e-03 4.54e-03 39.200 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.707 0.261 - - 1.44e-02 2.32e-03 50.960 57
CPL 1.674 1.070 477.4 0.0 1.50e-02 0.00e+00 50.950 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: 68.288000 sec.
T50 in the 50-300 keV band: 54.912000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 104.476 -73.608 30.868
T90 84.152 -61.076 23.076
T50 23.292 -15.388 7.904
Peak 1.000 2.984 3.984
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
330.9991 -17.9372 0.0111 36.3 -127.1 4.4656 17.3 TRIG_00584136
------------------------------------------
Foreground time interval of the image:
-73.608 30.868 (delta_t = 104.476 [sec])
Background time interval of the image:
-239.272 -73.608 (delta_t = 165.664 [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 -73.608 sec. to 30.868 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.86713 ( -0.130047 0.133546 )
Norm@50keV : 2.67555E-03 ( -0.000219498 0.000216691 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.03 using 59 PHA bins.
# Reduced chi-squared = 0.7374 for 57 degrees of freedom
# Null hypothesis probability = 9.310790e-01
Photon flux (15-150 keV) in 104.5 sec: 0.378722 ( -0.0273424 0.0273718 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.57041e-06 ( -2.09271e-07 2.11458e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -73.608 sec. to 30.868 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.32626 ( -0.636146 0.547104 )
Epeak [keV] : 55.5076 ( -12.6043 547.382 )
Norm@50keV : 5.30300E-03 ( -0.00260249 0.00647771 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.20 using 59 PHA bins.
# Reduced chi-squared = 0.7000 for 56 degrees of freedom
# Null hypothesis probability = 9.569636e-01
Photon flux (15-150 keV) in 104.5 sec: 0.369037 ( -0.029088 0.028998 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.44107e-06 ( -2.43464e-07 2.47717e-07 ) ergs/cm2
Band function
Time interval is from -73.608 sec. to 30.868 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.32492 ( 1.1737 0.336599 )
beta : -10.00000 ( 10 2.51672e-10 )
Epeak [keV] : 55.4505 ( -12.5066 19.8854 )
Norm@50keV : 5.31211E-03 ( -0.0026127 0.00321595 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.20 using 59 PHA bins.
# Reduced chi-squared = 0.7128 for 55 degrees of freedom
# Null hypothesis probability = 9.469084e-01
Photon flux (15-150 keV) in 104.5 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] : 11.3273 (-0.922856 1.01077)
R^2/D10^2 : 0.110306 (-0.0304924 0.0418448)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.73 using 59 PHA bins.
# Reduced chi-squared = 1.276 for 57 degrees of freedom
# Null hypothesis probability = 7.820680e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.106e-07 3.893e-08
25- 50 9.117e-07 8.203e-08
50-150 6.755e-07 1.283e-07
15-150 1.898e-06 1.646e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 86.8639 (-19.1421 29.0451)
Norm : 1.72794 (-0.18061 0.209864)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.18 using 59 PHA bins.
# Reduced chi-squared = 0.6873 for 57 degrees of freedom
# Null hypothesis probability = 9.656221e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.706e-07 5.314e-08
25- 50 7.896e-07 5.612e-08
50-150 1.176e-06 4.175e-07
15-150 2.436e-06 4.159e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.79838 (-1.83634 2.62285)
R1^2/D10^2 : 0.828576 (-0.551847 1.46708)
kT2 [keV] : 18.2048 (-4.12891 14.9784)
R2^2/D10^2 : 1.37662E-02 (-0.0119802 0.0266939)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.38 using 59 PHA bins.
# Reduced chi-squared = 0.7705 for 55 degrees of freedom
# Null hypothesis probability = 8.935093e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.628e-07 1.688e-07
25- 50 7.836e-07 2.532e-07
50-150 1.097e-06 5.282e-07
15-150 2.343e-06 7.620e-07
Peak spectrum fit
Power-law model
Time interval is from 2.984 sec. to 3.984 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.70698 ( -0.255151 0.266679 )
Norm@50keV : 1.44207E-02 ( -0.00235305 0.00229619 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.96 using 59 PHA bins.
# Reduced chi-squared = 0.8940 for 57 degrees of freedom
# Null hypothesis probability = 6.999235e-01
Photon flux (15-150 keV) in 1 sec: 1.91992 ( -0.284192 0.28444 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.33446e-07 ( -2.24989e-08 2.28012e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 2.984 sec. to 3.984 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.67401 ( -0.94256 1.19658 )
Epeak [keV] : 477.394 ( )
Norm@50keV : 1.50136E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.95 using 59 PHA bins.
# Reduced chi-squared = 0.9099 for 56 degrees of freedom
# Null hypothesis probability = 6.658477e-01
Photon flux (15-150 keV) in 1 sec: 1.91660 ( -0.2869 0.2869 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.33018e-07 ( -2.3472e-08 2.3193e-08 ) ergs/cm2
Band function
Time interval is from 2.984 sec. to 3.984 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.67392 ( -0.297584 0.723505 )
beta : -9.37165 ( 5.95179 9.37165 )
Epeak [keV] : 476.105 ( -426.552 -476.153 )
Norm@50keV : 1.50121E-02 ( -0.00293607 0.0307099 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.95 using 59 PHA bins.
# Reduced chi-squared = 0.9264 for 55 degrees of freedom
# Null hypothesis probability = 6.299520e-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] : 13.3496 (-2.86531 3.47841)
R^2/D10^2 : 0.311485 (-0.308773 0.429625)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.14 using 59 PHA bins.
# Reduced chi-squared = 1.213 for 57 degrees of freedom
# Null hypothesis probability = 1.299979e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.176e-08 3.756e-09
25- 50 4.168e-08 9.500e-09
50-150 4.768e-08 1.616e-08
15-150 1.011e-07 2.242e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 144.633 (-67.2059 -142.898)
Norm : 7.91096 (-1.28951 1.77503)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.53 using 59 PHA bins.
# Reduced chi-squared = 0.9041 for 57 degrees of freedom
# Null hypothesis probability = 6.795132e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.038e-08 1.149e-08
25- 50 3.757e-08 2.024e-08
50-150 7.304e-08 4.410e-08
15-150 1.310e-07 7.540e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.51451 (-1.77534 2.30274)
R1^2/D10^2 : 5.76068 (-4.20304 15.3186)
kT2 [keV] : 24.2839 (-6.83524 14.7673)
R2^2/D10^2 : 2.96196E-02 (-0.0236853 0.0411889)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.92 using 59 PHA bins.
# Reduced chi-squared = 0.9077 for 55 degrees of freedom
# Null hypothesis probability = 6.684568e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.349e-08 1.302e-08
25- 50 3.406e-08 1.640e-08
50-150 7.663e-08 4.409e-08
15-150 1.342e-07 7.000e-08
Plot creation:
Sat Jan 18 21:20:32 EST 2014