batgrbproduct Analysis for Trigger=633180
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 Mar 2 11:03:31 EST 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger633180/GCN5_download_cron
======================================================================
Trigger: 00633180 Segment: 000
BAT Trigger Time: 446931497.28 [s; MET]
Trigger Stop: 446931497.792 [s; MET]
UTC: 2015-03-01T19:38:04.027580 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 89.157317619222 Dec: -57.9771814195121 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.73
Image Trigger?: NO
Rate S/N Ratio: 17.8885438199983 [ if not an image trigger ]
Image S/N Ratio: 10.73
Flight Position: [ source = BAT ]
RA: 89.157317619222 Dec: -57.9771814195121 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 89.1618032330124 Dec: -57.9664592629417 [deg; J2000]
{ 05h 56m 38.8s , -57d 57' 59.3" }
+/- 0.754381887290061 [arcmin] (estimated 90% radius based on SNR)
+/- 0.185493541054654 [arcmin] (formal 1-sigma fit error)
SNR: 45.4975508813763
Angular difference between Flight and Ground position is 0.658973 arcmin
Partial Coding Fraction: 0.625 [ including projection effects ]
Duration
T90: 16.6560000181198 +/- 4.92139817334681
Measured from: 0.256000161170959
to: 16.9120001792908 [s; relative to TRIGTIME]
T50: 5.26400005817413 +/- 0.61240507282421
Measured from: 2.17600011825562
to: 7.44000017642975 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 3.65200001001358
to: 4.65200001001358 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.527999997138977
to: 24.0640000104904 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.748587 1.083024 0.845065 0.273771
0.037248 0.039244 0.034495 0.028261 [error]
Peak 0.084926 0.125006 0.118873 0.023979
0.008377 0.009511 0.008764 0.006601 [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 2.55e-07 4.77e-07 6.88e-07 2.11e-06 1.96e-06 3.53e-06 erg/cm2
Error 1.99e-08 2.19e-08 3.48e-08 2.39e-07 8.54e-08 2.60e-07 erg/cm2
Peak flux Power-law 9.05e-01 9.80e-01 7.54e-01 9.49e-01 3.00e+00 3.59e+00 ph/cm2/s
Error 1.27e-01 8.54e-02 7.06e-02 1.83e-01 2.41e-01 2.86e-01 ph/cm2/s
Fluence Cutoff-PL 2.52e-07 4.80e-07 6.93e-07 1.89e-06 1.95e-06 3.32e-06 erg/cm2
Error 2.35e-08 2.43e-08 3.82e-08 5.28e-07 9.19e-08 4.33e-07 erg/cm2
Peak flux Cutoff-PL 8.47e-01 1.01e+00 7.82e-01 6.85e-01 2.96e+00 3.32e+00 ph/cm2/s
Error 1.53e-01 9.67e-02 8.43e-02 3.17e-01 2.47e-01 4.20e-01 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 8.67e-01 1.00e+00 7.76e-01 7.51e-01 2.97e+00 3.40e+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 1.472 0.074 - - 8.35e-03 3.40e-04 79.480 57
CPL 1.400 0.199 444.9 0.0 9.03e-03 2.13e-03 79.280 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.378 0.132 - - 2.47e-02 1.94e-03 56.850 57
CPL 1.063 0.467 159.8 -44.7 3.50e-02 1.99e-02 55.700 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: 12.224000 sec.
T50 in the 50-300 keV band: 4.224000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 24.592 -0.528 24.064
T90 16.656 0.256 16.912
T50 5.264 2.176 7.440
Peak 1.000 3.652 4.652
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
89.1618 -57.9665 0.0042 35.8 -27.5 2.5551 45.5 TRIG_00633180
------------------------------------------
Foreground time interval of the image:
-0.528 10.121 (delta_t = 10.649 [sec])
Background time interval of the image:
-239.280 -236.380 (delta_t = 2.900 [sec])
-235.280 -117.220 (delta_t = 118.060 [sec])
-60.280 -0.528 (delta_t = 59.752 [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 -0.528 sec. to 24.064 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.47183 ( -0.0742635 0.0741895 )
Norm@50keV : 8.34667E-03 ( -0.000340367 0.000340245 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 79.48 using 59 PHA bins.
# Reduced chi-squared = 1.394 for 57 degrees of freedom
# Null hypothesis probability = 2.623230e-02
Photon flux (15-150 keV) in 24.59 sec: 1.03430 ( -0.0452175 0.0453282 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.95636e-06 ( -8.52988e-08 8.54859e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.528 sec. to 24.064 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.40008 ( -0.289567 0.109104 )
Epeak [keV] : 444.863 ( -444.875 -444.875 )
Norm@50keV : 9.03380E-03 ( -0.000974337 0.00328655 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 79.28 using 59 PHA bins.
# Reduced chi-squared = 1.416 for 56 degrees of freedom
# Null hypothesis probability = 2.201387e-02
Photon flux (15-150 keV) in 24.59 sec: 1.03000 ( -0.047852 0.04765 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.94821e-06 ( -9.25592e-08 9.12264e-08 ) ergs/cm2
Band function
Time interval is from -0.528 sec. to 24.064 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.31749 ( -4.31749 -4.31749 )
beta : -1.50124 ( -0.0797486 0.0788748 )
Epeak [keV] : 23.3316 ( -23.3315 105.5 )
Norm@50keV : 385.337 ( -385.368 692810 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 77.56 using 59 PHA bins.
# Reduced chi-squared = 1.410 for 55 degrees of freedom
# Null hypothesis probability = 2.421760e-02
Photon flux (15-150 keV) in 24.59 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] : 16.1773 ( )
R^2/D10^2 : 8.83631E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 226.28 using 59 PHA bins.
# Reduced chi-squared = 3.9698 for 57 degrees of freedom
# Null hypothesis probability = 4.999718e-22
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.173e-07 1.049e-08
25- 50 4.982e-07 3.049e-08
50-150 9.150e-07 6.627e-08
15-150 1.531e-06 7.205e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 4.24170 (-0.175398 0.175418)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 85.98 using 59 PHA bins.
# Reduced chi-squared = 1.508 for 57 degrees of freedom
# Null hypothesis probability = 7.845828e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.612e-07 1.180e-08
25- 50 5.024e-07 2.361e-08
50-150 1.102e-06 5.188e-08
15-150 1.865e-06 9.037e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.49071 (-1.08053 1.13103)
R1^2/D10^2 : 0.586952 (-0.191199 0.325435)
kT2 [keV] : 35.3197 (-6.30127 10.9429)
R2^2/D10^2 : 4.79275E-03 (-0.00267472 0.00451023)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 80.10 using 59 PHA bins.
# Reduced chi-squared = 1.456 for 55 degrees of freedom
# Null hypothesis probability = 1.521921e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.167e-07 2.427e-08
25- 50 5.150e-07 5.656e-08
50-150 1.223e-06 2.891e-07
15-150 1.954e-06 2.786e-07
Peak spectrum fit
Power-law model
Time interval is from 3.652 sec. to 4.652 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.37816 ( -0.132069 0.132367 )
Norm@50keV : 2.47218E-02 ( -0.00193797 0.00193457 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.85 using 59 PHA bins.
# Reduced chi-squared = 0.9974 for 57 degrees of freedom
# Null hypothesis probability = 4.807143e-01
Photon flux (15-150 keV) in 1 sec: 2.99607 ( -0.240662 0.240973 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.3997e-07 ( -2.05923e-08 2.068e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 3.652 sec. to 4.652 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.06327 ( -0.553305 0.37983 )
Epeak [keV] : 159.762 ( -70.2624 -159.762 )
Norm@50keV : 3.50318E-02 ( -0.0116505 0.0281672 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.70 using 59 PHA bins.
# Reduced chi-squared = 0.9946 for 56 degrees of freedom
# Null hypothesis probability = 4.862158e-01
Photon flux (15-150 keV) in 1 sec: 2.96172 ( -0.24708 0.24683 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.36611e-07 ( -2.157e-08 2.1496e-08 ) ergs/cm2
Band function
Time interval is from 3.652 sec. to 4.652 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.06458 ( -0.304393 0.550663 )
beta : -10.0000 ( 10 7.10543e-15 )
Epeak [keV] : 159.802 ( -50.5131 -159.865 )
Norm@50keV : 3.50121E-02 ( -0.0116675 0.0282014 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.70 using 59 PHA bins.
# Reduced chi-squared = 1.013 for 55 degrees of freedom
# Null hypothesis probability = 4.483207e-01
Photon flux (15-150 keV) in 1 sec: 2.97426 ( ) 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] : 17.4656 (-1.68652 1.89788)
R^2/D10^2 : 0.209863 (-0.0626193 0.0875032)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 91.14 using 59 PHA bins.
# Reduced chi-squared = 1.599 for 57 degrees of freedom
# Null hypothesis probability = 2.735167e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.294e-08 2.045e-09
25- 50 5.847e-08 6.730e-09
50-150 1.284e-07 1.910e-08
15-150 1.998e-07 2.075e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 12.4405 (-0.973082 0.973014)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.26 using 59 PHA bins.
# Reduced chi-squared = 1.075 for 57 degrees of freedom
# Null hypothesis probability = 3.257579e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.098e-08 2.860e-09
25- 50 5.959e-08 9.320e-09
50-150 1.307e-07 3.704e-08
15-150 2.212e-07 5.655e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.92115 (-1.56832 2.19348)
R1^2/D10^2 : 4.76004 (-3.15268 11.3872)
kT2 [keV] : 24.7370 (-3.8567 6.50007)
R2^2/D10^2 : 5.50778E-02 (-0.0313291 0.0469359)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.22 using 59 PHA bins.
# Reduced chi-squared = 1.004 for 55 degrees of freedom
# Null hypothesis probability = 4.664969e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.764e-08 1.242e-08
25- 50 5.429e-08 1.402e-08
50-150 1.528e-07 4.144e-08
15-150 2.347e-07 5.440e-08
Plot creation:
Mon Mar 2 11:08:04 EST 2015