batgrbproduct Analysis for Trigger=642620
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): Mon Jun 8 07:07:36 EDT 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger642620/GCN5_download_cron
======================================================================
Trigger: 00642620 Segment: 000
BAT Trigger Time: 455356523.264 [s; MET]
Trigger Stop: 455356523.776 [s; MET]
UTC: 2015-06-07T07:55:09.579340 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 140.023986719496 Dec: 68.4424007671775 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.81
Image Trigger?: NO
Rate S/N Ratio: 19.6214168703486 [ if not an image trigger ]
Image S/N Ratio: 10.81
Flight Position: [ source = BAT ]
RA: 140.023986719496 Dec: 68.4424007671775 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 140.014989440786 Dec: 68.436191417008 [deg; J2000]
{ 09h 20m 03.6s , +68d 26' 10.3" }
+/- 1.21334878410674 [arcmin] (estimated 90% radius based on SNR)
+/- 0.48497006599698 [arcmin] (formal 1-sigma fit error)
SNR: 23.0748489484564
Angular difference between Flight and Ground position is 0.422087 arcmin
Partial Coding Fraction: 0.3125 [ including projection effects ]
Duration
T90: 26.2599999308586 +/- 0.713257322255766
Measured from: 0.204000115394592
to: 26.4640000462532 [s; relative to TRIGTIME]
T50: 13.6999999284744 +/- 5.58122563115831
Measured from: 1.82000011205673
to: 15.5200000405312 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 7.28799998760223
to: 8.28799998760223 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.191999971866608
to: 27.5839999914169 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.846087 1.424228 1.024152 0.237677
0.064773 0.069046 0.060667 0.048037 [error]
Peak 0.139096 0.231255 0.163346 0.049705
0.015515 0.017612 0.015951 0.010630 [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 3.51e-07 6.10e-07 8.10e-07 2.19e-06 2.36e-06 3.96e-06 erg/cm2
Error 3.41e-08 3.67e-08 5.94e-08 3.39e-07 1.45e-07 3.85e-07 erg/cm2
Peak flux Power-law 1.56e+00 1.62e+00 1.19e+00 1.41e+00 4.92e+00 5.78e+00 ph/cm2/s
Error 2.32e-01 1.57e-01 1.25e-01 2.86e-01 4.50e-01 5.18e-01 ph/cm2/s
Fluence Cutoff-PL 3.17e-07 6.49e-07 8.44e-07 9.96e-07 2.28e-06 2.81e-06 erg/cm2
Error 4.02e-08 4.51e-08 6.67e-08 5.04e-07 1.57e-07 5.17e-07 erg/cm2
Peak flux Cutoff-PL 1.34e+00 1.77e+00 1.31e+00 6.36e-01 4.83e+00 5.06e+00 ph/cm2/s
Error 2.67e-01 1.94e-01 1.52e-01 3.41e-01 4.54e-01 5.50e-01 ph/cm2/s
Fluence Band 2.94e-07 6.77e-07 7.97e-07 1.75e-06 2.29e-06 3.53e-06 erg/cm2
Error 4.56e-08 5.28e-08 6.25e-08 -------- 1.50e-07 4.33e-07 erg/cm2
Peak flux Band 1.35e+00 1.77e+00 1.31e+00 6.48e-01 4.84e+00 5.07e+00 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 1.592 0.096 - - 9.09e-03 5.26e-04 48.090 57
CPL 0.994 0.410 84.9 40.1 1.81e-02 8.89e-03 40.900 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.446 0.137 - - 3.99e-02 3.57e-03 68.430 57
CPL 0.588 0.603 84.4 39.7 1.08e-01 8.36e-02 60.980 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: 26.048000 sec.
T50 in the 50-300 keV band: 13.696000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 27.776 -0.192 27.584
T90 26.260 0.204 26.464
T50 13.700 1.820 15.520
Peak 1.000 7.288 8.288
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
140.0150 +68.4362 0.0083 42.4 -137.5 3.5196 23.1 TRIG_00642620
------------------------------------------
Foreground time interval of the image:
-0.192 27.584 (delta_t = 27.776 [sec])
Background time interval of the image:
-239.264 -0.192 (delta_t = 239.072 [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 -0.192 sec. to 27.584 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.59246 ( -0.0960716 0.0966571 )
Norm@50keV : 9.08682E-03 ( -0.000526286 0.00052522 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.09 using 59 PHA bins.
# Reduced chi-squared = 0.8437 for 57 degrees of freedom
# Null hypothesis probability = 7.936762e-01
Photon flux (15-150 keV) in 27.78 sec: 1.16498 ( -0.0691869 0.0693206 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.36297e-06 ( -1.44815e-07 1.45302e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.192 sec. to 27.584 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.993671 ( -0.429977 0.390596 )
Epeak [keV] : 84.9428 ( -17.2774 62.839 )
Norm@50keV : 1.81411E-02 ( -0.00645538 0.0113316 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.90 using 59 PHA bins.
# Reduced chi-squared = 0.7304 for 56 degrees of freedom
# Null hypothesis probability = 9.351604e-01
Photon flux (15-150 keV) in 27.78 sec: 1.13482 ( -0.07173 0.07182 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.27854e-06 ( -1.56904e-07 1.56601e-07 ) ergs/cm2
Band function
Time interval is from -0.192 sec. to 27.584 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.993651 ( -0.335905 0.468238 )
beta : -10.0000 ( 10 7.10543e-15 )
Epeak [keV] : 84.9269 ( -13.6633 62.8242 )
Norm@50keV : 1.81403E-02 ( -0.0064531 0.011342 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.90 using 59 PHA bins.
# Reduced chi-squared = 0.7436 for 55 degrees of freedom
# Null hypothesis probability = 9.214872e-01
Photon flux (15-150 keV) in 27.78 sec: 1.13485 ( 5.86515 -0.07175 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.2928e-06 ( -2.29261e-06 -1.49579e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 14.4704 (-0.999304 1.07867)
R^2/D10^2 : 0.148310 (-0.0341877 0.0440002)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 98.56 using 59 PHA bins.
# Reduced chi-squared = 1.729 for 57 degrees of freedom
# Null hypothesis probability = 5.260739e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.816e-07 1.835e-08
25- 50 6.974e-07 5.320e-08
50-150 9.775e-07 1.158e-07
15-150 1.857e-06 1.251e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 178.351 (-43.3529 -177.678)
Norm : 4.77429 (-0.297794 0.327784)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.09 using 59 PHA bins.
# Reduced chi-squared = 0.7384 for 57 degrees of freedom
# Null hypothesis probability = 9.302080e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.348e-07 2.709e-08
25- 50 6.354e-07 1.140e-07
50-150 1.341e-06 4.996e-07
15-150 2.311e-06 6.220e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.90057 (-1.29816 1.41233)
R1^2/D10^2 : 0.835665 (-0.33392 0.651271)
kT2 [keV] : 26.7852 (-4.81228 8.20577)
R2^2/D10^2 : 1.18001E-02 (-0.00731858 0.0137053)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.34 using 59 PHA bins.
# Reduced chi-squared = 0.6790 for 55 degrees of freedom
# Null hypothesis probability = 9.672393e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.989e-07 6.444e-08
25- 50 6.754e-07 1.174e-07
50-150 1.324e-06 5.702e-07
15-150 2.299e-06 6.273e-07
Peak spectrum fit
Power-law model
Time interval is from 7.288 sec. to 8.288 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.44617 ( -0.13636 0.136738 )
Norm@50keV : 3.99300E-02 ( -0.00357226 0.0035684 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.43 using 59 PHA bins.
# Reduced chi-squared = 1.200 for 57 degrees of freedom
# Null hypothesis probability = 1.428869e-01
Photon flux (15-150 keV) in 1 sec: 4.91617 ( -0.449962 0.450563 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.82371e-07 ( -3.65607e-08 3.66921e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 7.288 sec. to 8.288 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.587897 ( -0.649025 0.557334 )
Epeak [keV] : 84.4160 ( -18.2239 61.174 )
Norm@50keV : 0.107853 ( -0.0503235 0.116965 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.98 using 59 PHA bins.
# Reduced chi-squared = 1.089 for 56 degrees of freedom
# Null hypothesis probability = 3.014523e-01
Photon flux (15-150 keV) in 1 sec: 4.83173 ( -0.45415 0.45458 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.69484e-07 ( -3.886e-08 3.8605e-08 ) ergs/cm2
Band function
Time interval is from 7.288 sec. to 8.288 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.587710 ( -0.514425 0.50774 )
beta : -10.0000 ( 10 0 )
Epeak [keV] : 84.4014 ( -14.7178 61.1632 )
Norm@50keV : 0.107868 ( -0.0502893 0.117034 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.98 using 59 PHA bins.
# Reduced chi-squared = 1.109 for 55 degrees of freedom
# Null hypothesis probability = 2.695732e-01
Photon flux (15-150 keV) in 1 sec: 4.83558 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.74336e-07 ( -3.74329e-07 -3.7196e-08 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 15.3970 (-1.61027 1.83203)
R^2/D10^2 : 0.542067 (-0.177865 0.25811)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 80.82 using 59 PHA bins.
# Reduced chi-squared = 1.418 for 57 degrees of freedom
# Null hypothesis probability = 2.068066e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.678e-08 4.295e-09
25- 50 1.090e-07 1.414e-08
50-150 1.778e-07 2.745e-08
15-150 3.135e-07 3.445e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 20.4628 (-1.81912 1.81913)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.78 using 59 PHA bins.
# Reduced chi-squared = 1.154 for 57 degrees of freedom
# Null hypothesis probability = 1.990080e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.118e-08 5.255e-09
25- 50 9.846e-08 1.621e-08
50-150 2.159e-07 7.996e-08
15-150 3.656e-07 8.115e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.12577 (-2.17498 1.25322)
R1^2/D10^2 : 2.19119 (-1.06085 2.64568)
kT2 [keV] : 30.1619 (-8.07149 22.3242)
R2^2/D10^2 : 3.48540E-02 (-0.0292677 0.0826102)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.37 using 59 PHA bins.
# Reduced chi-squared = 1.043 for 55 degrees of freedom
# Null hypothesis probability = 3.874790e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.072e-08 1.737e-08
25- 50 1.083e-07 4.004e-08
50-150 2.269e-07 1.053e-07
15-150 3.759e-07 1.372e-07
Plot creation:
Mon Jun 8 07:11:19 EDT 2015