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Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
238.3071 -46.6186 0.0375 18.4 18.1 0.5544 5.2 TRIG_00642453
------------------------------------------
Foreground time interval of the image:
0.000 64.000 (delta_t = 64.000 [sec])
Background time interval of the image:
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 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.48558 ( -0.528219 0.643544 )
Norm@50keV : 3.48729E-04 ( -0.000160692 0.000170427 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.38 using 59 PHA bins.
# Reduced chi-squared = 0.9014 for 57 degrees of freedom
# Null hypothesis probability = 6.849826e-01
Photon flux (15-150 keV) in 64 sec: 6.78954E-02 ( -0.0192892 0.01939 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.22186e-07 ( -7.74886e-08 8.74899e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -3.89983 ( 2.5504 3.94275 )
Epeak [keV] : 26.0602 ( -10.667 6.04821 )
Norm@50keV : 12.6844 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.42 using 59 PHA bins.
# Reduced chi-squared = 0.8290 for 56 degrees of freedom
# Null hypothesis probability = 8.154916e-01
Photon flux (15-150 keV) in 64 sec: 6.55220E-02 ( -0.0179706 0.0180879 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.71847e-07 ( -4.98131e-08 5.87155e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.23314 ( -4.82306 -4.23309 )
beta : -4.92522 ( 4.88556 2.29881 )
Epeak [keV] : 25.7915 ( -6.6069 5.38399 )
Norm@50keV : 23.5883 ( -23.6944 15.2498 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.29 using 59 PHA bins.
# Reduced chi-squared = 0.8417 for 55 degrees of freedom
# Null hypothesis probability = 7.921983e-01
Photon flux (15-150 keV) in 64 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] : 6.53075 (-1.40346 1.78279)
R^2/D10^2 : 0.187778 (-0.187778 0.332999)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.80 using 59 PHA bins.
# Reduced chi-squared = 0.8211 for 57 degrees of freedom
# Null hypothesis probability = 8.303121e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.618e-08 4.474e-08
25- 50 9.085e-08 5.510e-08
50-150 1.163e-08 9.760e-09
15-150 1.787e-07 1.059e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 26.7121 (-11.4498 26.4842)
Norm : 0.621503 (-0.273372 0.52985)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.19 using 59 PHA bins.
# Reduced chi-squared = 0.8630 for 57 degrees of freedom
# Null hypothesis probability = 7.595172e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.591e-08 3.579e-08
25- 50 8.110e-08 4.456e-08
50-150 3.793e-08 3.193e-08
15-150 1.949e-07 1.048e-07
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.49832 (-6.5767 193.331)
R1^2/D10^2 : 0.190992 (-0.144823 -0.144823)
kT2 [keV] : 199.990 ( )
R2^2/D10^2 : 6.11680E-07 (-6.1168e-07 -6.1168e-07)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.80 using 59 PHA bins.
#Fit statistic : Chi-Squared = 46.78 using 59 PHA bins.
# Reduced chi-squared = 0.8510 for 55 degrees of freedom
# Reduced chi-squared = 0.8506 for 55 degrees of freedom
# Null hypothesis probability = 7.762740e-01
# Null hypothesis probability = 7.769276e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.603e-08 7.011e-02
25- 50 9.108e-08 6.243e-01
50-150 1.178e-08 1.517e+01
15-150 1.789e-07 1.627e+01
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.48558 ( -0.528219 0.643544 )
Norm@50keV : 3.48729E-04 ( -0.000160692 0.000170427 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.38 using 59 PHA bins.
# Reduced chi-squared = 0.9014 for 57 degrees of freedom
# Null hypothesis probability = 6.849826e-01
Photon flux (15-150 keV) in 64 sec: 6.78954E-02 ( -0.0192892 0.01939 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.22186e-07 ( -7.74886e-08 8.74899e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -3.89983 ( 2.5504 3.94275 )
Epeak [keV] : 26.0602 ( -10.667 6.04821 )
Norm@50keV : 12.6844 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.42 using 59 PHA bins.
# Reduced chi-squared = 0.8290 for 56 degrees of freedom
# Null hypothesis probability = 8.154916e-01
Photon flux (15-150 keV) in 64 sec: 6.55220E-02 ( -0.0179706 0.0180879 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.71847e-07 ( -4.98131e-08 5.87155e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.23314 ( -4.82306 -4.23309 )
beta : -4.92522 ( 4.88556 2.29881 )
Epeak [keV] : 25.7915 ( -6.6069 5.38399 )
Norm@50keV : 23.5883 ( -23.6944 15.2498 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.29 using 59 PHA bins.
# Reduced chi-squared = 0.8417 for 55 degrees of freedom
# Null hypothesis probability = 7.921983e-01
Photon flux (15-150 keV) in 64 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] : 6.53075 (-1.40346 1.78279)
R^2/D10^2 : 0.187778 (-0.187778 0.332999)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.80 using 59 PHA bins.
# Reduced chi-squared = 0.8211 for 57 degrees of freedom
# Null hypothesis probability = 8.303121e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.618e-08 4.162e-08
25- 50 9.085e-08 5.659e-08
50-150 1.163e-08 9.792e-09
15-150 1.787e-07 1.064e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 26.7121 (-11.4498 26.4842)
Norm : 0.621503 (-0.273372 0.52985)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.19 using 59 PHA bins.
# Reduced chi-squared = 0.8630 for 57 degrees of freedom
# Null hypothesis probability = 7.595172e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.591e-08 3.919e-08
25- 50 8.110e-08 4.601e-08
50-150 3.793e-08 3.016e-08
15-150 1.949e-07 1.122e-07
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.49832 (-6.5767 193.331)
R1^2/D10^2 : 0.190992 (-0.144823 -0.144823)
kT2 [keV] : 199.990 ( )
R2^2/D10^2 : 6.11680E-07 (-6.1168e-07 -6.1168e-07)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.80 using 59 PHA bins.
#Fit statistic : Chi-Squared = 46.78 using 59 PHA bins.
# Reduced chi-squared = 0.8510 for 55 degrees of freedom
# Reduced chi-squared = 0.8506 for 55 degrees of freedom
# Null hypothesis probability = 7.762740e-01
# Null hypothesis probability = 7.769276e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.603e-08 7.472e-02
25- 50 9.108e-08 6.294e-01
50-150 1.178e-08 1.346e+01
15-150 1.789e-07 1.513e+01
Pre-slew spectrum (Pre-slew PHA with pre-slew DRM)
Power-law model
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.48558 ( -0.528219 0.643544 )
Norm@50keV : 3.48729E-04 ( -0.000160692 0.000170427 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.38 using 59 PHA bins.
# Reduced chi-squared = 0.9014 for 57 degrees of freedom
# Null hypothesis probability = 6.849826e-01
Photon flux (15-150 keV) in 64 sec: 6.78954E-02 ( -0.0192892 0.01939 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.22186e-07 ( -7.74886e-08 8.74899e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -3.89983 ( 2.5504 3.94275 )
Epeak [keV] : 26.0602 ( -10.667 6.04821 )
Norm@50keV : 12.6844 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.42 using 59 PHA bins.
# Reduced chi-squared = 0.8290 for 56 degrees of freedom
# Null hypothesis probability = 8.154916e-01
Photon flux (15-150 keV) in 64 sec: 6.55220E-02 ( -0.0179706 0.0180879 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.71847e-07 ( -4.98131e-08 5.87155e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.23314 ( -4.82306 -4.23309 )
beta : -4.92522 ( 4.88556 2.29881 )
Epeak [keV] : 25.7915 ( -6.6069 5.38399 )
Norm@50keV : 23.5883 ( -23.6944 15.2498 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.29 using 59 PHA bins.
# Reduced chi-squared = 0.8417 for 55 degrees of freedom
# Null hypothesis probability = 7.921983e-01
Photon flux (15-150 keV) in 64 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 7.36e-08
S(50-100 keV) = 5.25e-08
T90 vs. Hardness ratio plot
T90 = 64 sec.
Hardness ratio (energy fluence ratio) = 0.713315
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.745414
Count Ratio (50-100 keV) / (15-25 keV) = 0.145825
Mask shadow pattern
IMX = 3.162695103570443E-01, IMY = -1.036662040063631E-01
TIME vs. PHA plot around the trigger time
TIME vs. DetID plot around the trigger time
100 us light curve (15-350 keV)
Spacecraft aspect plot
Bright source in the pre-burst/pre-slew/post-slew images
Pre-burst image of 15-350 keV band
Time interval of the image:
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
0.000000 64.000000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.4365 -60.5058 23.7 48.9 -36.8 -0.1725 -0.5 7.9 Cen X-3
186.7008 -62.6541 6.1 41.1 -34.2 0.3480 1.9 7.1 GX 301-2
245.1090 -15.5816 4.1 39.7 70.8 1.3436 2.8 8.3 Sco X-1
255.8233 -37.9906 19.3 15.4 72.5 -0.0762 -0.6 11.7 4U 1700-377
256.3796 -36.5790 4.8 16.6 75.9 0.3141 2.4 9.7 GX 349+2
263.1662 -24.8720 5.8 27.0 97.8 0.3404 2.0 11.4 GX 1+4
264.7562 -44.2947 5.1 7.5 98.3 0.2458 2.3 9.3 4U 1735-44
270.2197 -25.1896 4.7 26.9 112.0 0.4201 2.5 7.5 GX 5-1
270.4693 -25.7627 13.3 26.3 112.7 -0.1461 -0.9 9.1 GRS 1758-258
274.0054 -14.0288 20.0 38.4 115.9 0.2117 0.6 0.5 GX 17+2
275.9758 -30.3478 7.0 22.8 126.4 0.2252 1.7 2.9 H1820-303
284.9480 -24.8045 9.1 30.8 138.7 0.2172 1.3 8.5 HT1900.1-2455
263.1461 -33.7960 30.6 18.1 96.2 0.0491 0.4 8.2 GX 354-0
215.6930 -26.9298 2.8 44.6 26.7 1.1007 4.1 ------ UNKNOWN
213.3088 -26.6175 2.4 46.3 24.8 1.3629 4.8 ------ UNKNOWN
218.9669 -49.1436 2.3 29.3 -0.9 0.6463 5.0 ------ UNKNOWN
167.3390 -47.3709 2.3 58.8 -25.8 3.7556 4.9 ------ UNKNOWN
162.6485 -61.3523 2.7 51.4 -40.7 2.4836 4.3 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
121.700600 238.100580
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.2070 -60.7492 23.1 40.6 -74.4 0.3373 0.5 8.2 Cen X-3
186.6604 -62.7695 137.8 32.7 -77.0 0.0254 0.1 0.1 GX 301-2
245.0035 -15.6281 0.9 31.5 73.8 4.0447 12.6 1.6 Sco X-1
255.8611 -37.6569 0.0 15.7 123.0 0.2145 1.2 12.7 4U 1700-377
256.5758 -36.3705 4.1 17.0 120.9 0.5022 2.8 7.5 GX 349+2
262.8537 -24.8578 7.9 29.2 111.9 -0.4206 -1.5 10.8 GX 1+4
264.7382 -44.3800 6.5 18.6 154.2 0.2987 1.8 4.2 4U 1735-44
270.2904 -25.0550 5.6 33.3 122.3 0.6680 2.0 1.5 GX 5-1
270.1870 -25.6412 6.0 32.8 122.8 -0.6138 -1.9 8.7 GRS 1758-258
275.8352 -30.3568 3.7 33.1 135.5 0.9673 3.1 4.7 H1820-303
285.0751 -25.0570 2.9 42.8 137.8 2.1674 3.9 8.5 HT1900.1-2455
262.9818 -33.8137 5.5 22.6 125.8 0.4303 2.1 1.3 GX 354-0
283.2026 -30.4673 2.4 38.0 142.5 1.6618 4.8 ------ UNKNOWN
337.6379 -59.5618 2.5 55.2 -156.1 2.8127 4.5 ------ UNKNOWN
172.6715 -20.4318 2.8 58.7 -25.8 5.0986 4.1 ------ UNKNOWN
168.9609 -37.4407 4.1 50.7 -44.7 2.7096 2.8 ------ UNKNOWN
Plot creation:
Thu Jun 4 23:42:32 EDT 2015