batgrbproduct Analysis for Trigger=701182
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): Fri Jun 24 08:51:34 EDT 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger701182/batgroup_hand_proc
======================================================================
Trigger: 00701182 Segment: 000
BAT Trigger Time: 488402696.52 [s; MET]
Trigger Stop: 488402696.536 [s; MET]
UTC: 2016-06-23T19:24:40.060740 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 293.71550324118 Dec: 21.8936538877306 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 21.52
Image Trigger?: NO
Rate S/N Ratio: 255.998046867549 [ if not an image trigger ]
Image S/N Ratio: 21.52
Flight Position: [ source = BAT ]
RA: 293.71550324118 Dec: 21.8936538877306 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 293.76300094675 Dec: 21.8629927963324 [deg; J2000]
{ 19h 35m 03.1s , +21d 51' 46.8" }
+/- 1.76979113447417 [arcmin] (estimated 90% radius based on SNR)
+/- 0.749771407015898 [arcmin] (formal 1-sigma fit error)
SNR: 13.4568704827552
Angular difference between Flight and Ground position is 3.221540 arcmin
Partial Coding Fraction: 0.4609375 [ including projection effects ]
Duration
T90: 400.035999953747 +/- 889.815056121522
Measured from: -0.00400000810623169
to: 400.031999945641 [s; relative to TRIGTIME]
T50: 63.9119999408722 +/- 612.607502577749
Measured from: 336.068000018597
to: 399.979999959469 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.0259999632835388
to: 0.974000036716461 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.00400000810623169
to: 800.068000018597 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.236714 0.067885 -0.044511 0.173291
0.154323 0.150860 0.129864 0.109144 [error]
Peak 0.304071 0.299215 0.042232 0.003234
0.013323 0.012898 0.007964 0.005515 [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 6.00e-08 3.60e-08 1.38e-08 7.05e-09 1.13e-07 1.17e-07 erg/cm2
Error 6.44e-08 5.60e-08 6.32e-08 1.23e-06 1.85e-07 1.24e-06 erg/cm2
Peak flux Power-law 3.71e+00 1.80e+00 5.31e-01 1.98e-01 6.15e+00 6.23e+00 ph/cm2/s
Error -------- -------- -------- -------- -------- -------- ph/cm2/s
Fluence Cutoff-PL 6.00e-08 3.80e-08 1.25e-08 2.47e-09 1.13e-07 1.13e-07 erg/cm2
Error 6.55e-08 7.24e-08 6.49e-08 -------- 1.84e-07 -------- erg/cm2
Peak flux Cutoff-PL 2.98e+00 2.45e+00 3.15e-01 2.45e-03 5.75e+00 5.75e+00 ph/cm2/s
Error 3.33e-01 1.74e-01 7.97e-02 3.59e-03 3.86e-01 3.86e-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 3.384 0.000 - - 9.65e-06 2.52e-05 46.940 57
CPL 1.733 0.000 5.1 0.0 1.29e-04 0.00e+00 46.970 56
The chi2 of BB fit is 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 2.759 0.000 - - 2.65e-02 0.00e+00 130.410 57
CPL -1.074 1.002 27.9 2.1 7.14e+00 1.80e+01 48.460 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 800.072 -0.004 800.068
T90 400.036 -0.004 400.032
T50 63.912 336.068 399.980
Peak 1.000 -0.026 0.974
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
293.7630 21.8630 0.0143 27.5464 -86.3202 0.6114071 13.457 TRIG_00701182
Foreground time interval of the image:
-0.004 9.781 (delta_t = 9.785 [sec])
Background time interval of the image:
-107.619 -0.004 (delta_t = 107.615 [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 -0.004 sec. to 800.068 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.38409 ( -3.38409 -3.38409 )
Norm@50keV : 9.65296E-06 ( -9.65298e-06 4.0684e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.94 using 59 PHA bins.
# Reduced chi-squared = 0.8235 for 57 degrees of freedom
# Null hypothesis probability = 8.266567e-01
Photon flux (15-150 keV) in 800.1 sec: 3.55717E-03 ( -0.00355717 0.00450113 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.1341e-07 ( -1.1341e-07 2.57291e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.004 sec. to 800.068 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.73330 ( )
Epeak [keV] : 5.11670 ( )
Norm@50keV : 1.29469E-04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.97 using 59 PHA bins.
# Reduced chi-squared = 0.8387 for 56 degrees of freedom
# Null hypothesis probability = 7.996511e-01
Photon flux (15-150 keV) in 800.1 sec: 3.58629E-03 ( -0.00358629 0.00446015 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.12729e-07 ( -1.12729e-07 2.5623e-07 ) ergs/cm2
Band function
Time interval is from -0.004 sec. to 800.068 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.67702 ( 1.85176 1.85176 )
beta : -3.38422 ( 9.37167 9.37167 )
Epeak [keV] : 0.893264 ( -2.84515 -2.84515 )
Norm@50keV : 2.99030E-03 ( -0.00299019 94626.2 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.94 using 59 PHA bins.
# Reduced chi-squared = 0.8534 for 55 degrees of freedom
# Null hypothesis probability = 7.720211e-01
Photon flux (15-150 keV) in 800.1 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] : 4.10498 (-4.10498 -4.10498)
R^2/D10^2 : 7.74876E-02 (-0.0774876 -0.0774876)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.06 using 59 PHA bins.
# Reduced chi-squared = 0.8257 for 57 degrees of freedom
# Null hypothesis probability = 8.231913e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.384e-08 4.485e-08
25- 50 2.480e-08 1.785e-08
50-150 3.518e-10 4.157e-10
15-150 8.899e-08 6.529e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 13.5179 (-13.8351 -13.8351)
Norm : 7.18644E-02 (-0.0660436 -0.0660436)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.99 using 59 PHA bins.
# Reduced chi-squared = 0.8243 for 57 degrees of freedom
# Null hypothesis probability = 8.252785e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.095e-08 4.489e-08
25- 50 3.761e-08 3.664e-08
50-150 5.371e-09 7.661e-09
15-150 1.039e-07 8.601e-08
Double BB
# Reduced chi-squared = 0.8417 for 55 degrees of freedom
# Reduced chi-squared = 0.8399 for 55 degrees of freedom
# Reduced chi-squared = 0.8390 for 55 degrees of freedom
# Reduced chi-squared = 0.8387 for 55 degrees of freedom
# Reduced chi-squared = 0.8385 for 55 degrees of freedom
# Null hypothesis probability = 7.732072e-01
# Null hypothesis probability = 7.738764e-01
# Null hypothesis probability = 7.866941e-01
# Null hypothesis probability = 7.922256e-01
# Null hypothesis probability = 7.952769e-01
# Null hypothesis probability = 7.966360e-01
# Null hypothesis probability = 7.972086e-01
# Null hypothesis probability = 7.975208e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.044e-08 6.189e-08
25- 50 4.216e-08 6.169e-08
50-150 2.028e-08 1.009e-08
15-150 1.229e-07 9.893e-08
Peak spectrum fit
Power-law model
Time interval is from -0.026 sec. to 0.974 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.75871 ( )
Norm@50keV : 2.64919E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 130.41 using 59 PHA bins.
# Reduced chi-squared = 2.2879 for 57 degrees of freedom
# Null hypothesis probability = 1.112205e-07
Photon flux (15-150 keV) in 1 sec: 6.14936 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.87866e-07 ( 0 0 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.026 sec. to 0.974 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.07378 ( -1.083 0.920897 )
Epeak [keV] : 27.9274 ( -2.31133 1.80106 )
Norm@50keV : 7.13818 ( -7.32313 28.6451 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.46 using 59 PHA bins.
# Reduced chi-squared = 0.8653 for 56 degrees of freedom
# Null hypothesis probability = 7.528935e-01
Photon flux (15-150 keV) in 1 sec: 5.74970 ( -0.3851 0.38678 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.56328e-07 ( -1.6639e-08 1.6891e-08 ) ergs/cm2
Band function
Time interval is from -0.026 sec. to 0.974 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.08491 ( -0.915198 0.790672 )
beta : -9.37167 ( 9.37167 19.2996 )
Epeak [keV] : 27.9348 ( -1.47356 1.82869 )
Norm@50keV : 7.31962 ( -7.31928 76.2236 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.41 using 59 PHA bins.
# Reduced chi-squared = 0.8802 for 55 degrees of freedom
# Null hypothesis probability = 7.226788e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.56028e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 7.34896 (-0.359361 0.373083)
R^2/D10^2 : 9.87634 (-1.95636 2.45237)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.47 using 59 PHA bins.
# Reduced chi-squared = 0.8679 for 57 degrees of freedom
# Null hypothesis probability = 7.503408e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.988e-08 8.150e-09
25- 50 1.350e-07 9.050e-09
50-150 2.659e-08 5.195e-09
15-150 2.515e-07 1.525e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 26.1523 (-2.53512 2.87336)
Norm : 57.4463 (-6.68716 7.59019)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.74 using 59 PHA bins.
# Reduced chi-squared = 1.276 for 57 degrees of freedom
# Null hypothesis probability = 7.809823e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.082e-07 8.265e-09
25- 50 1.141e-07 7.600e-09
50-150 5.180e-08 9.515e-09
15-150 2.742e-07 1.865e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.22855 (-6.25458 -6.25458)
R1^2/D10^2 : 11.7977 (-11.8549 9.17804)
kT2 [keV] : 9.07562 (-9.20926 -9.20926)
R2^2/D10^2 : 1.80424 (-1.54315 10.1125)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.28 using 59 PHA bins.
# Reduced chi-squared = 0.8778 for 55 degrees of freedom
# Null hypothesis probability = 7.272744e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.310e-08 2.450e-07
25- 50 1.318e-07 8.240e-07
50-150 3.186e-08 5.130e-07
15-150 2.567e-07 1.301e-06
Plot creation:
Fri Jun 24 09:02:04 EDT 2016