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Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
176.9066 -62.0213 0.0418 23.2 -6.3 0.4220 4.6 TRIG_00519850
------------------------------------------
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
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
8 ms binning
From T100_start-3 s to T100_start+3 s
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
2 ms binning
From T100_start-1 s to T100_start+1 s
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
SN=5 or 10 sec. binning (whichever binning is satisfied first)
SN=5 or 10 sec. binning (T < 200 sec)
The mask-weighted light curves based on cleaned DPHs
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: 2.15590 ( -0.448907 0.524065 )
Norm@50keV : 4.39408E-04 ( -0.000153972 0.000147878 )
------------------------------------------------------------
# Chi-Squared = 44.97 using 59 PHA bins.
# Reduced chi-squared = 0.7890 for 57 degrees of freedom
# Null hypothesis probability = 8.756923e-01
Photon flux (15-150 keV) in 64 sec: 7.11001E-02 ( -0.0169759 0.0169773 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.62886e-07 ( -7.74214e-08 8.26208e-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: 1.25149 ( -3.88027 0.853103 )
Epeak [keV] : 30.1062 ( )
Norm@50keV : 1.62970E-03 ( )
------------------------------------------------------------
# Chi-Squared = 44.61 using 59 PHA bins.
# Reduced chi-squared = 0.7967 for 56 degrees of freedom
# Null hypothesis probability = 8.632140e-01
Photon flux (15-150 keV) in 64 sec: 6.90604E-02 ( -0.0174188 0.0173196 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) 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 : -1.13802 ( 1.11445 1.11445 )
beta : -2.70481 ( 2.69541 0.940008 )
Epeak [keV] : 29.4627 ( -30.3716 43.7556 )
Norm@50keV : 1.97817E-03 ( -0.00139269 212.718 )
------------------------------------------------------------
# Chi-Squared = 44.41 using 59 PHA bins.
# Reduced chi-squared = 0.8075 for 55 degrees of freedom
# Null hypothesis probability = 8.456130e-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] : 8.47876 (-1.97509 2.52492)
R^2/D10^2 : 6.33193E-02 (-0.0409542 0.117765)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 46.27 using 59 PHA bins.
# Reduced chi-squared = 0.8118 for 57 degrees of freedom
# Null hypothesis probability = 8.442598e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.482e-08 2.462e-08
25- 50 1.059e-07 5.286e-08
50-150 3.354e-08 2.248e-08
15-150 1.942e-07 9.525e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 46.5519 (-21.7461 64.3207)
Norm : 0.421235 (-0.15093 0.262212)
------------------------------------------------------------
# Chi-Squared = 44.61 using 59 PHA bins.
# Reduced chi-squared = 0.7826 for 57 degrees of freedom
# Null hypothesis probability = 8.836639e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.477e-08 2.516e-08
25- 50 9.062e-08 3.532e-08
50-150 8.211e-08 6.078e-08
15-150 2.375e-07 1.054e-07
Double BB
------------------------------------------------------------
# Chi-Squared = 44.77 using 59 PHA bins.
# Chi-Squared = 44.48 using 59 PHA bins.
# Chi-Squared = 44.44 using 59 PHA bins.
# Chi-Squared = 44.43 using 59 PHA bins.
# Reduced chi-squared = 0.8141 for 55 degrees of freedom
# Reduced chi-squared = 0.8088 for 55 degrees of freedom
# Reduced chi-squared = 0.8080 for 55 degrees of freedom
# Reduced chi-squared = 0.8078 for 55 degrees of freedom
# Null hypothesis probability = 8.360685e-01
# Null hypothesis probability = 8.438456e-01
# Null hypothesis probability = 8.448982e-01
# Null hypothesis probability = 8.452480e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.243e-08 3.086e-08
25- 50 9.696e-08 5.843e-08
50-150 5.038e-08 3.571e-08
15-150 2.098e-07 1.179e-07
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: 2.15590 ( -0.448907 0.524065 )
Norm@50keV : 4.39408E-04 ( -0.000153972 0.000147878 )
------------------------------------------------------------
# Chi-Squared = 44.97 using 59 PHA bins.
# Reduced chi-squared = 0.7890 for 57 degrees of freedom
# Null hypothesis probability = 8.756923e-01
Photon flux (15-150 keV) in 64 sec: 7.11001E-02 ( -0.0169759 0.0169773 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.62886e-07 ( -7.74214e-08 8.26208e-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: 1.25149 ( -3.88027 0.855236 )
Epeak [keV] : 30.1062 ( )
Norm@50keV : 1.62970E-03 ( )
------------------------------------------------------------
# Chi-Squared = 44.61 using 59 PHA bins.
# Reduced chi-squared = 0.7967 for 56 degrees of freedom
# Null hypothesis probability = 8.632140e-01
Photon flux (15-150 keV) in 64 sec: 6.90604E-02 ( -0.0174188 0.017319 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) 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 : -1.13802 ( 1.11445 1.11445 )
beta : -2.70481 ( 2.69541 0.940008 )
Epeak [keV] : 29.4627 ( -30.3716 43.7549 )
Norm@50keV : 1.97817E-03 ( -0.00139269 212.718 )
------------------------------------------------------------
# Chi-Squared = 44.41 using 59 PHA bins.
# Reduced chi-squared = 0.8075 for 55 degrees of freedom
# Null hypothesis probability = 8.456130e-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] : 8.47876 (-1.97509 2.52492)
R^2/D10^2 : 6.33193E-02 (-0.0409542 0.117765)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 46.27 using 59 PHA bins.
# Reduced chi-squared = 0.8118 for 57 degrees of freedom
# Null hypothesis probability = 8.442598e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.482e-08 2.724e-08
25- 50 1.059e-07 4.813e-08
50-150 3.354e-08 2.335e-08
15-150 1.942e-07 9.717e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 46.5519 (-21.7461 64.3207)
Norm : 0.421235 (-0.15093 0.262212)
------------------------------------------------------------
# Chi-Squared = 44.61 using 59 PHA bins.
# Reduced chi-squared = 0.7826 for 57 degrees of freedom
# Null hypothesis probability = 8.836639e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.477e-08 2.352e-08
25- 50 9.062e-08 3.778e-08
50-150 8.211e-08 5.647e-08
15-150 2.375e-07 1.072e-07
Double BB
------------------------------------------------------------
# Chi-Squared = 44.77 using 59 PHA bins.
# Chi-Squared = 44.48 using 59 PHA bins.
# Chi-Squared = 44.44 using 59 PHA bins.
# Chi-Squared = 44.43 using 59 PHA bins.
# Reduced chi-squared = 0.8141 for 55 degrees of freedom
# Reduced chi-squared = 0.8088 for 55 degrees of freedom
# Reduced chi-squared = 0.8080 for 55 degrees of freedom
# Reduced chi-squared = 0.8078 for 55 degrees of freedom
# Null hypothesis probability = 8.360685e-01
# Null hypothesis probability = 8.438456e-01
# Null hypothesis probability = 8.448982e-01
# Null hypothesis probability = 8.452480e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.243e-08 2.759e-08
25- 50 9.696e-08 5.718e-08
50-150 5.038e-08 3.472e-08
15-150 2.098e-07 1.165e-07
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: 2.15590 ( -0.448907 0.524065 )
Norm@50keV : 4.39408E-04 ( -0.000153972 0.000147878 )
------------------------------------------------------------
# Chi-Squared = 44.97 using 59 PHA bins.
# Reduced chi-squared = 0.7890 for 57 degrees of freedom
# Null hypothesis probability = 8.756923e-01
Photon flux (15-150 keV) in 64 sec: 7.11001E-02 ( -0.0169759 0.0169773 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.62886e-07 ( -7.74214e-08 8.26208e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.25149 ( -3.88027 0.853103 )
Epeak [keV] : 30.1062 ( )
Norm@50keV : 1.62970E-03 ( )
------------------------------------------------------------
# Chi-Squared = 44.61 using 59 PHA bins.
# Reduced chi-squared = 0.7967 for 56 degrees of freedom
# Null hypothesis probability = 8.632140e-01
Photon flux (15-150 keV) in 64 sec: 6.90604E-02 ( -0.0174188 0.017319 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.13802 ( 1.11445 1.11445 )
beta : -2.70481 ( 2.69541 0.940008 )
Epeak [keV] : 29.4627 ( -30.3716 43.7551 )
Norm@50keV : 1.97817E-03 ( -0.00139269 212.718 )
------------------------------------------------------------
# Chi-Squared = 44.41 using 59 PHA bins.
# Reduced chi-squared = 0.8075 for 55 degrees of freedom
# Null hypothesis probability = 8.456130e-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) = 8.24422e-08
S(50-100 keV) = 7.39974e-08
T90 vs. Hardness ratio plot
T90 = 64 sec.
Hardness ratio (energy fluence ratio) = 0.897567
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.43986
Count Ratio (50-100 keV) / (15-25 keV) = 0.319952
Mask shadow pattern
IMX = 4.267302322829064E-01, IMY = 4.732413308434173E-02
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
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] [']
135.5872 -40.5335 3.2 55.7 -0.4 1.4750 3.6 3.0 Vela X-1
170.2174 -60.6154 3.6 26.7 -5.2 0.2976 3.2 2.9 Cen X-3
186.6638 -62.7459 11.0 18.7 -6.6 -0.0915 -1.1 1.5 GX 301-2
244.9651 -15.6552 1.0 45.4 141.4 3.6912 11.2 1.2 Sco X-1
255.9828 -37.8369 1.0 29.0 171.8 1.1072 11.3 0.5 4U 1700-377
256.4163 -36.6093 15.0 30.3 171.0 0.0786 0.8 11.2 GX 349+2
263.1805 -24.6762 4.8 43.5 169.0 -0.3999 -2.4 10.2 GX 1+4
264.7181 -44.2632 6.6 28.4 -169.1 0.1606 1.7 11.3 4U 1735-44
270.4207 -25.0842 11.0 46.4 177.3 -0.1933 -1.1 7.4 GX 5-1
270.1752 -25.7291 3.4 45.7 177.5 0.6234 3.4 6.9 GRS 1758-258
275.7636 -30.4313 88.9 44.6 -173.0 0.0201 0.1 9.2 H1820-303
285.1275 -24.9594 42.7 53.8 -168.2 0.0729 0.3 5.5 HT1900.1-2455
262.9791 -33.8702 14.1 35.5 176.3 0.0932 0.8 2.2 GX 354-0
176.9068 -62.0212 2.5 23.2 -6.3 0.4213 4.6 ------ UNKNOWN
288.1959 -26.3079 2.4 54.3 -164.4 1.2741 4.8 ------ UNKNOWN
358.1324 -77.6599 2.7 41.0 -80.8 1.6252 4.3 ------ UNKNOWN
335.3598 -72.5737 2.8 40.9 -92.5 1.6556 4.0 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
118.900580 893.840000
895.000000 963.031600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.5373 -40.5482 0.3 32.7 -5.7 29.7727 42.7 0.6 Vela X-1
170.3678 -60.6354 1.4 3.4 -7.2 4.6687 8.6 1.7 Cen X-3
186.9858 -62.7928 6.5 4.7 167.3 1.0340 1.8 9.1 GX 301-2
255.9203 -37.9096 3.0 52.2 164.2 9.3647 3.8 5.0 4U 1700-377
256.3487 -36.4444 5.8 53.6 163.5 5.7793 2.0 4.4 GX 349+2
264.7538 -44.5121 7.1 50.8 176.0 2.9789 1.6 3.8 4U 1735-44
176.8595 -61.9619 2.4 0.0 -21.1 2.8152 4.8 ------ UNKNOWN
136.5169 -36.7261 2.8 35.4 -0.8 3.0520 4.1 ------ UNKNOWN
121.9351 -20.8814 2.7 55.5 -5.4 8.0407 4.4 ------ UNKNOWN
117.9092 -87.4381 3.0 26.8 -112.3 3.0833 3.8 ------ UNKNOWN
Plot creation:
Wed Apr 11 14:36:05 EDT 2012