batgrbproduct Analysis for Trigger=704155
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 Jul 13 18:09:28 EDT 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger704155/GCN5_download_cron
======================================================================
Trigger: 00704155 Segment: 000
BAT Trigger Time: 490046032.576 [s; MET]
Trigger Stop: 490046033.6 [s; MET]
UTC: 2016-07-12T19:53:36.025560 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 304.149318030523 Dec: -26.9813085140697 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.67
Image Trigger?: NO
Rate S/N Ratio: 39.560080889705 [ if not an image trigger ]
Image S/N Ratio: 7.67
Flight Position: [ source = BAT ]
RA: 304.149318030523 Dec: -26.9813085140697 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 304.166295431457 Dec: -26.9646631301557 [deg; J2000]
{ 20h 16m 39.9s , -26d 57' 52.8" }
+/- 1.31715480829849 [arcmin] (estimated 90% radius based on SNR)
+/- 0.596471577411054 [arcmin] (formal 1-sigma fit error)
SNR: 20.5214779271485
Angular difference between Flight and Ground position is 1.349672 arcmin
Partial Coding Fraction: 0.2402344 [ including projection effects ]
Duration
T90: 44.5600000023842 +/- 6.37439379528038
Measured from: -3.33599984645844
to: 41.2240001559258 [s; relative to TRIGTIME]
T50: 21.1360000371933 +/- 2.4899413504438
Measured from: 3.6560001373291
to: 24.7920001745224 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.0600000023841858
to: 1.06000000238419 [s; relative to TRIGTIME]
Total Fluence
Measured from: -8.59999996423721
to: 45.4640000462532 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.822888 1.239179 1.198082 0.500749
0.083963 0.088562 0.079506 0.066496 [error]
Peak 0.044363 0.086383 0.133958 0.063134
0.012804 0.014810 0.015715 0.013248 [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 2.42e-07 5.42e-07 9.55e-07 3.94e-06 2.61e-06 5.68e-06 erg/cm2
Error 3.52e-08 4.59e-08 7.55e-08 7.35e-07 1.93e-07 7.69e-07 erg/cm2
Peak flux Power-law 3.95e-01 6.41e-01 7.87e-01 1.90e+00 2.36e+00 3.73e+00 ph/cm2/s
Error 1.36e-01 1.34e-01 1.13e-01 6.27e-01 3.51e-01 6.39e-01 ph/cm2/s
Fluence Cutoff-PL 2.43e-07 5.43e-07 9.55e-07 3.90e-06 2.61e-06 5.64e-06 erg/cm2
Error 3.53e-08 4.51e-08 7.56e-08 1.01e-06 1.92e-07 1.01e-06 erg/cm2
Peak flux Cutoff-PL 3.94e-01 6.41e-01 7.87e-01 1.89e+00 2.36e+00 3.71e+00 ph/cm2/s
Error 1.64e-01 1.35e-01 1.35e-01 8.93e-01 3.53e-01 9.03e-01 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band -------- -------- -------- -------- -------- -------- ph/cm2/s
Error -------- -------- -------- -------- -------- -------- ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.182 0.128 - - 4.73e-03 3.28e-04 50.000 57
CPL 1.177 0.221 10000.0 0.0 4.75e-03 3.27e-04 50.040 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.704 0.268 - - 2.05e-02 3.20e-03 45.950 57
CPL 0.696 0.271 9997.8 0.0 2.06e-02 1.83e-02 45.950 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: 23.232000 sec.
T50 in the 50-300 keV band: 14.016000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 54.064 -8.600 45.464
T90 44.560 -3.336 41.224
T50 21.136 3.656 24.792
Peak 1.000 0.060 1.060
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
304.1663 -26.9647 0.0094 34.1 83.0 4.0437 20.5 TRIG_00704155
------------------------------------------
Foreground time interval of the image:
-8.600 45.464 (delta_t = 54.064 [sec])
Background time interval of the image:
-239.576 -8.600 (delta_t = 230.976 [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 -8.600 sec. to 45.464 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.18158 ( -0.129024 0.126849 )
Norm@50keV : 4.72945E-03 ( -0.000328688 0.000327739 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.00 using 59 PHA bins.
# Reduced chi-squared = 0.8772 for 57 degrees of freedom
# Null hypothesis probability = 7.328104e-01
Photon flux (15-150 keV) in 54.06 sec: 0.553744 ( -0.0406112 0.0408374 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.60763e-06 ( -1.92434e-07 1.93532e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -8.600 sec. to 45.464 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.17704 ( -0.287307 0.155313 )
Epeak [keV] : 1.00000E+04 ( -10000 -10000 )
Norm@50keV : 4.75245E-03 ( -0.000327066 0.000326549 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.04 using 59 PHA bins.
# Reduced chi-squared = 0.8935 for 56 degrees of freedom
# Null hypothesis probability = 6.989281e-01
Photon flux (15-150 keV) in 54.06 sec: 0.554158 ( -0.041144 0.040206 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.6066e-06 ( -1.9127e-07 1.92816e-07 ) ergs/cm2
Band function
Time interval is from -8.600 sec. to 45.464 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.921952 ( 0.922672 0.922672 )
beta : -1.18155 ( 1.18155 0.129042 )
Epeak [keV] : 56.5165 ( -55.7165 -55.7165 )
Norm@50keV : 8.59525E-03 ( -0.00359237 332282 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.00 using 59 PHA bins.
# Reduced chi-squared = 0.9091 for 55 degrees of freedom
# Null hypothesis probability = 6.656082e-01
Photon flux (15-150 keV) in 54.06 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] : 20.7738 (-2.0551 2.40792)
R^2/D10^2 : 2.20363E-02 (-0.00659431 0.00906134)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 107.42 using 59 PHA bins.
# Reduced chi-squared = 1.8846 for 57 degrees of freedom
# Null hypothesis probability = 6.138452e-05
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.757e-08 1.514e-08
25- 50 4.981e-07 5.625e-08
50-150 1.601e-06 1.843e-07
15-150 2.196e-06 2.054e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-13.6096 -200)
Norm : 2.33486 (-0.164542 0.164542)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 77.97 using 59 PHA bins.
# Reduced chi-squared = 1.368 for 57 degrees of freedom
# Null hypothesis probability = 3.398764e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.142e-07 2.419e-08
25- 50 6.044e-07 6.101e-08
50-150 1.326e-06 3.603e-07
15-150 2.244e-06 4.500e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.31250 (-2.19047 2.55135)
R1^2/D10^2 : 0.291468 (-0.162297 0.528726)
kT2 [keV] : 40.3173 (-10.4904 31.034)
R2^2/D10^2 : 2.37090E-03 (-0.00180937 0.0036703)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.75 using 59 PHA bins.
# Reduced chi-squared = 0.9590 for 55 degrees of freedom
# Null hypothesis probability = 5.612151e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.290e-07 7.158e-08
25- 50 5.607e-07 1.577e-07
50-150 1.876e-06 7.559e-07
15-150 2.666e-06 9.444e-07
Peak spectrum fit
Power-law model
Time interval is from 0.060 sec. to 1.060 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.704204 ( -0.277461 0.258766 )
Norm@50keV : 2.04546E-02 ( -0.00324659 0.00315682 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.95 using 59 PHA bins.
# Reduced chi-squared = 0.8062 for 57 degrees of freedom
# Null hypothesis probability = 8.524358e-01
Photon flux (15-150 keV) in 1 sec: 2.36359 ( -0.350229 0.352064 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.49203e-07 ( -3.7459e-08 3.762e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.060 sec. to 1.060 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.695993 ( -0.280186 0.2609 )
Epeak [keV] : 9997.76 ( -9997.46 -9997.46 )
Norm@50keV : 2.06155E-02 ( -0.00304594 0.0334694 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.95 using 59 PHA bins.
# Reduced chi-squared = 0.8205 for 56 degrees of freedom
# Null hypothesis probability = 8.287514e-01
Photon flux (15-150 keV) in 1 sec: 2.36300 ( -0.35477 0.35085 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.49085e-07 ( -3.7709e-08 1.8941e-08 ) ergs/cm2
Band function
Time interval is from 0.060 sec. to 1.060 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.875799 ( 0.875799 0.875799 )
beta : -0.704204 ( -0.258538 0.277463 )
Epeak [keV] : 14.2584 ( -14.2584 -14.2584 )
Norm@50keV : 3.01293E-02 ( -0.0127262 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.95 using 59 PHA bins.
# Reduced chi-squared = 0.8355 for 55 degrees of freedom
# Null hypothesis probability = 8.025458e-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] : 30.1079 (-5.7614 8.41747)
R^2/D10^2 : 3.59483E-02 (-0.0177494 0.0305566)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.33 using 59 PHA bins.
# Reduced chi-squared = 0.9181 for 57 degrees of freedom
# Null hypothesis probability = 6.504758e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.087e-09 1.510e-09
25- 50 3.142e-08 8.870e-09
50-150 2.009e-07 5.260e-08
15-150 2.374e-07 5.365e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-29.4261 -200)
Norm : 9.16323 (-1.45357 1.45357)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.22 using 59 PHA bins.
# Reduced chi-squared = 1.302 for 57 degrees of freedom
# Null hypothesis probability = 6.234846e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.281e-08 1.320e-08
25- 50 4.387e-08 2.487e-08
50-150 9.622e-08 5.390e-08
15-150 1.629e-07 9.250e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.64513 (-2.81785 6.50498)
R1^2/D10^2 : 1.64686 (-1.45713 12.5416)
kT2 [keV] : 39.3496 (-10.3678 34.4819)
R2^2/D10^2 : 1.58328E-02 (-0.0126058 0.0220726)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.64 using 59 PHA bins.
# Reduced chi-squared = 0.8117 for 55 degrees of freedom
# Null hypothesis probability = 8.395115e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.423e-08 7.985e-09
25- 50 3.536e-08 1.854e-08
50-150 2.053e-07 1.139e-07
15-150 2.549e-07 1.282e-07
Plot creation:
Wed Jul 13 18:18:40 EDT 2016