batgrbproduct Analysis for Trigger=621229
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 Dec 13 03:37:30 EST 2014
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger621229/GCN5_download_cron
======================================================================
Trigger: 00621229 Segment: 000
BAT Trigger Time: 440079253.984 [s; MET]
Trigger Stop: 440079254.048 [s; MET]
UTC: 2014-12-12T12:14:01.076940 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 39.1608986244416 Dec: 18.1511958647858 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 11.02
Image Trigger?: NO
Rate S/N Ratio: 30.9838667696593 [ if not an image trigger ]
Image S/N Ratio: 11.02
Flight Position: [ source = BAT ]
RA: 39.1608986244416 Dec: 18.1511958647858 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 39.167131137304 Dec: 18.1632018317348 [deg; J2000]
{ 02h 36m 40.1s , +18d 09' 47.5" }
+/- 1.86589788940382 [arcmin] (estimated 90% radius based on SNR)
+/- 0.659843693911255 [arcmin] (formal 1-sigma fit error)
SNR: 12.4777334401566
Angular difference between Flight and Ground position is 0.803228 arcmin
Partial Coding Fraction: 0.5859375 [ including projection effects ]
Duration
T90: 0.295999944210052 +/- 0.0808949807674213
Measured from: 0.00400006771087646
to: 0.300000011920929 [s; relative to TRIGTIME]
T50: 0.0799999237060547 +/- 0.0486621400652921
Measured from: 0.0240001082420349
to: 0.10400003194809 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.330000042915344
to: 0.669999957084656 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 0.335999965667725 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.040736 0.044272 0.043589 0.007440
0.005845 0.006362 0.005732 0.003882 [error]
Peak 0.043547 0.057255 0.049555 0.003728
0.008480 0.008930 0.007807 0.006216 [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 1.09e-08 1.89e-08 2.48e-08 6.64e-08 7.26e-08 1.21e-07 erg/cm2
Error 2.30e-09 2.68e-09 4.78e-09 2.55e-08 1.16e-08 3.01e-08 erg/cm2
Peak flux Power-law 4.07e-01 4.11e-01 2.91e-01 3.29e-01 1.24e+00 1.44e+00 ph/cm2/s
Error 1.08e-01 7.03e-02 6.20e-02 1.39e-01 2.05e-01 2.43e-01 ph/cm2/s
Fluence Cutoff-PL 1.02e-08 2.01e-08 2.61e-08 3.59e-08 7.17e-08 9.23e-08 erg/cm2
Error 2.62e-09 3.40e-09 5.50e-09 4.02e-08 1.20e-08 3.25e-08 erg/cm2
Peak flux Cutoff-PL 3.42e-01 4.53e-01 3.16e-01 1.27e-01 1.20e+00 1.24e+00 ph/cm2/s
Error 1.29e-01 8.82e-02 7.37e-02 1.89e-01 2.10e-01 2.65e-01 ph/cm2/s
Fluence Band 1.01e-08 2.00e-08 2.60e-08 3.61e-08 7.17e-08 9.26e-08 erg/cm2
Error 2.59e-09 -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 3.61e-01 4.42e-01 3.12e-01 1.62e-01 1.22e+00 1.28e+00 ph/cm2/s
Error -------- -------- 7.20e-02 -------- -------- 2.61e-01 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.604 0.225 - - 2.31e-02 3.46e-03 59.260 57
CPL 1.140 0.686 94.3 -28.3 4.00e-02 4.59e-02 58.240 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.495 0.272 - - 9.94e-03 1.70e-03 58.940 57
CPL 0.488 1.292 74.7 -27.2 3.23e-02 8.73e-02 56.580 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: 0.064000 sec.
T50 in the 50-300 keV band: 0.064000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 0.336 0.000 0.336
T90 0.296 0.004 0.300
T50 0.080 0.024 0.104
Peak 1.000 -0.330 0.670
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
39.1671 +18.1632 0.0155 22.2 76.9 0.1459 12.5 TRIG_00621229
------------------------------------------
Foreground time interval of the image:
0.000 0.336 (delta_t = 0.336 [sec])
Background time interval of the image:
-239.984 0.000 (delta_t = 239.984 [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 0.000 sec. to 0.336 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.60391 ( -0.219324 0.230655 )
Norm@50keV : 2.31170E-02 ( -0.00348367 0.00343188 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.26 using 59 PHA bins.
# Reduced chi-squared = 1.040 for 57 degrees of freedom
# Null hypothesis probability = 3.932064e-01
Photon flux (15-150 keV) in 0.336 sec: 2.97424 ( -0.420321 0.420451 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.26069e-08 ( -1.16037e-08 1.16896e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.336 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.13964 ( -0.940129 0.432849 )
Epeak [keV] : 94.2620 ( -37.6989 -94.262 )
Norm@50keV : 4.00445E-02 ( -0.0128142 0.0790436 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.24 using 59 PHA bins.
# Reduced chi-squared = 1.040 for 56 degrees of freedom
# Null hypothesis probability = 3.929001e-01
Photon flux (15-150 keV) in 0.336 sec: 2.95787 ( -0.42199 0.42176 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.17293e-08 ( -1.20533e-08 1.19858e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.336 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.14137 ( -0.49899 0.770599 )
beta : -9.37166 ( 9.37167 19.3717 )
Epeak [keV] : 94.0940 ( -35.6436 -94.1631 )
Norm@50keV : 4.00224E-02 ( -0.0196069 0.0210631 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.24 using 59 PHA bins.
# Reduced chi-squared = 1.059 for 55 degrees of freedom
# Null hypothesis probability = 3.570313e-01
Photon flux (15-150 keV) in 0.336 sec: 2.95437 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 7.16873e-08 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 14.1687 (-2.40368 2.92794)
R^2/D10^2 : 0.422601 (-0.204765 0.386139)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.72 using 59 PHA bins.
# Reduced chi-squared = 1.258 for 57 degrees of freedom
# Null hypothesis probability = 9.065862e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.014e-09 1.584e-09
25- 50 2.263e-08 5.247e-09
50-150 3.010e-08 9.307e-09
15-150 5.875e-08 1.193e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 174.901 (-78.5044 -174.68)
Norm : 12.3160 (-1.79151 2.04404)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.31 using 59 PHA bins.
# Reduced chi-squared = 1.023 for 57 degrees of freedom
# Null hypothesis probability = 4.269073e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.047e-08 5.830e-09
25- 50 1.982e-08 1.094e-08
50-150 4.153e-08 2.334e-08
15-150 7.182e-08 4.002e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.69479 (-1.91862 2.98966)
R1^2/D10^2 : 6.64656 (-5.01503 27.5307)
kT2 [keV] : 22.8632 (-5.93167 10.8119)
R2^2/D10^2 : 6.25362E-02 (-0.0481362 0.131928)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.45 using 59 PHA bins.
# Reduced chi-squared = 1.045 for 55 degrees of freedom
# Null hypothesis probability = 3.845394e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.089e-08 6.105e-09
25- 50 1.869e-08 8.710e-09
50-150 4.274e-08 2.300e-08
15-150 7.232e-08 3.068e-08
Peak spectrum fit
Power-law model
Time interval is from -0.330 sec. to 0.670 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.49521 ( -0.268045 0.276157 )
Norm@50keV : 9.93670E-03 ( -0.00170863 0.0016901 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.94 using 59 PHA bins.
# Reduced chi-squared = 1.034 for 57 degrees of freedom
# Null hypothesis probability = 4.043940e-01
Photon flux (15-150 keV) in 1 sec: 1.23890 ( -0.20469 0.204893 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.43368e-08 ( -1.7591e-08 1.78996e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.330 sec. to 0.670 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.488410 ( -1.48834 1.09593 )
Epeak [keV] : 74.7439 ( -20.261 -74.7455 )
Norm@50keV : 3.23094E-02 ( -0.0323083 0.142257 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.58 using 59 PHA bins.
# Reduced chi-squared = 1.010 for 56 degrees of freedom
# Null hypothesis probability = 4.531710e-01
Photon flux (15-150 keV) in 1 sec: 1.19859 ( -0.210491 0.21014 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.88441e-08 ( -1.82225e-08 1.89419e-08 ) ergs/cm2
Band function
Time interval is from -0.330 sec. to 0.670 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.487644 ( -0.955907 1.56329 )
beta : -10.0000 ( 10 0 )
Epeak [keV] : 74.6994 ( -21.6109 425.61 )
Norm@50keV : 3.23439E-02 ( -0.0323439 0.142294 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.58 using 59 PHA bins.
# Reduced chi-squared = 1.029 for 55 degrees of freedom
# Null hypothesis probability = 4.157610e-01
Photon flux (15-150 keV) in 1 sec: 1.21528 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 9.196e-08 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 15.1091 (-2.57011 3.17331)
R^2/D10^2 : 0.144144 (-0.0706341 0.131647)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.77 using 59 PHA bins.
# Reduced chi-squared = 1.066 for 57 degrees of freedom
# Null hypothesis probability = 3.415907e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.881e-09 1.896e-09
25- 50 2.752e-08 7.020e-09
50-150 4.290e-08 1.613e-08
15-150 7.730e-08 1.874e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.330 (-98.5563 -199.35)
Norm : 5.10580 (-0.831196 0.831956)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.83 using 59 PHA bins.
# Reduced chi-squared = 1.015 for 57 degrees of freedom
# Null hypothesis probability = 4.442667e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.271e-08 7.410e-09
25- 50 2.446e-08 1.388e-08
50-150 5.364e-08 3.027e-08
15-150 9.081e-08 5.105e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.74487 (-2.79817 7.50416)
R1^2/D10^2 : 3.72979 (-3.52888 18.3821)
kT2 [keV] : 18.6138 (-4.34932 20.3009)
R2^2/D10^2 : 6.14483E-02 (-0.0587395 0.0873249)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.09 using 59 PHA bins.
# Reduced chi-squared = 1.020 for 55 degrees of freedom
# Null hypothesis probability = 4.336594e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.154e-08 6.725e-09
25- 50 2.417e-08 1.292e-08
50-150 5.079e-08 2.988e-08
15-150 8.650e-08 4.574e-08
Plot creation:
Sat Dec 13 03:41:06 EST 2014