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Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
276.2223 -24.8743 0.0268 0.1 -98.2 0.7645 7.1 TRIG_00552369
------------------------------------------
Foreground time interval of the image:
-15.896 53.744 (delta_t = 69.640 [sec])
Background time interval of the image:
-239.000 -15.896 (delta_t = 223.104 [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
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)
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 -15.896 sec. to 53.744 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.99259 ( -0.304993 0.327885 )
Norm@50keV : 7.52038E-04 ( -0.000153162 0.000146534 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 35.41 using 59 PHA bins.
# Reduced chi-squared = 0.6212 for 57 degrees of freedom
# Null hypothesis probability = 9.890023e-01
Photon flux (15-150 keV) in 69.64 sec: 0.112423 ( -0.0170652 0.017077 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.82778e-07 ( -8.95591e-08 9.28984e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -15.896 sec. to 53.744 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.42158 ( )
Epeak [keV] : 153.791 ( )
Norm@50keV : 4.60468E-04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 35.01 using 59 PHA bins.
# Reduced chi-squared = 0.6251 for 56 degrees of freedom
# Null hypothesis probability = 9.874663e-01
Photon flux (15-150 keV) in 69.64 sec: 0.112486 ( -0.0171516 0.017005 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.79689e-07 ( -8.88001e-08 9.29478e-08 ) ergs/cm2
Band function
Time interval is from -15.896 sec. to 53.744 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.665124 ( 1.41962 1.41962 )
beta : -2.03457 ( 2.01178 0.321372 )
Epeak [keV] : 20.8670 ( -22.8606 -22.8606 )
Norm@50keV : 0.113929 ( -0.11374 259.577 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 35.30 using 59 PHA bins.
# Reduced chi-squared = 0.6419 for 55 degrees of freedom
# Null hypothesis probability = 9.821003e-01
Photon flux (15-150 keV) in 69.64 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] : 9.00513 (-1.91102 2.56883)
R^2/D10^2 : 7.30258E-02 (-0.0724082 0.114105)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.66 using 59 PHA bins.
# Reduced chi-squared = 0.9238 for 57 degrees of freedom
# Null hypothesis probability = 6.385356e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.032e-08 2.477e-08
25- 50 1.709e-07 4.286e-08
50-150 6.529e-08 3.144e-08
15-150 3.165e-07 7.970e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 70.8582 (-29.816 77.1028)
Norm : 0.540489 (-0.124973 0.184163)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.79 using 59 PHA bins.
# Reduced chi-squared = 0.6629 for 57 degrees of freedom
# Null hypothesis probability = 9.766776e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.669e-08 2.177e-08
25- 50 1.543e-07 2.956e-08
50-150 2.000e-07 1.072e-07
15-150 4.511e-07 1.379e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.14409 (-1.48293 1.95796)
R1^2/D10^2 : 0.549437 (-0.391287 1.83525)
kT2 [keV] : 24.4231 (-9.31253 35.3841)
R2^2/D10^2 : 1.39821E-03 (-0.00128421 0.00409991)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 34.73 using 59 PHA bins.
# Reduced chi-squared = 0.6314 for 55 degrees of freedom
# Null hypothesis probability = 9.851360e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.143e-07 6.209e-08
25- 50 1.301e-07 6.232e-08
50-150 2.574e-07 1.477e-07
15-150 5.018e-07 2.534e-07
Peak spectrum fit
Power-law model
Time interval is from 36.944 sec. to 37.944 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.50848 ( -0.935765 0.867965 )
Norm@50keV : 2.26709E-03 ( -0.00112803 0.00109656 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.69 using 59 PHA bins.
# Reduced chi-squared = 1.012 for 57 degrees of freedom
# Null hypothesis probability = 4.494364e-01
Photon flux (15-150 keV) in 1 sec: 0.283672 ( -0.136539 0.137669 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.14772e-08 ( -1.09797e-08 1.16465e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 36.944 sec. to 37.944 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.605233 ( 0.674318 4.67493 )
Epeak [keV] : 50.2516 ( -49.7266 -49.7266 )
Norm@50keV : 3.80478E-02 ( -0.0477786 4831.14 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.31 using 59 PHA bins.
# Reduced chi-squared = 1.023 for 56 degrees of freedom
# Null hypothesis probability = 4.264781e-01
Photon flux (15-150 keV) in 1 sec: 0.256752 ( -0.13813 0.153585 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.62874e-08 ( -8.46259e-09 1.58487e-08 ) ergs/cm2
Band function
Time interval is from 36.944 sec. to 37.944 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -5 -5 )
beta : -1.80197 ( 1.80396 1.04699 )
Epeak [keV] : 26.8856 ( -26.915 58.6598 )
Norm@50keV : 177.104 ( -79.6176 2.72831e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.85 using 59 PHA bins.
# Reduced chi-squared = 1.034 for 55 degrees of freedom
# Null hypothesis probability = 4.058566e-01
Photon flux (15-150 keV) in 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] : 12.3299 (-4.64534 8.65114)
R^2/D10^2 : 6.71263E-02 (-0.0671263 0.304198)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.31 using 59 PHA bins.
# Reduced chi-squared = 1.005 for 57 degrees of freedom
# Null hypothesis probability = 4.637519e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.162e-09 1.407e-09
25- 50 7.022e-09 4.754e-09
50-150 6.534e-09 4.770e-09
15-150 1.572e-08 1.083e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 187.378 (-188.336 -188.336)
Norm : 1.16738 (-0.552388 1.06743)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.62 using 59 PHA bins.
# Reduced chi-squared = 1.011 for 57 degrees of freedom
# Null hypothesis probability = 4.520078e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.930e-09 1.932e-09
25- 50 5.594e-09 3.725e-09
50-150 1.201e-08 7.955e-09
15-150 2.054e-08 1.320e-08
Double BB
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.26 using 59 PHA bins.
#Fit statistic : Chi-Squared = 56.07 using 59 PHA bins.
#Fit statistic : Chi-Squared = 56.02 using 59 PHA bins.
#Fit statistic : Chi-Squared = 56.00 using 59 PHA bins.
# Reduced chi-squared = 1.041 for 55 degrees of freedom
# Reduced chi-squared = 1.019 for 55 degrees of freedom
# Reduced chi-squared = 1.018 for 55 degrees of freedom
# Reduced chi-squared = 1.018 for 55 degrees of freedom
# Null hypothesis probability = 3.912199e-01
# Null hypothesis probability = 4.346818e-01
# Null hypothesis probability = 4.364632e-01
# Null hypothesis probability = 4.370622e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.457e-09 3.485e-09
25- 50 6.756e-09 7.995e-09
50-150 7.081e-09 6.840e-09
15-150 1.629e-08 1.300e-08
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: 1.99259 ( -0.304993 0.327885 )
Norm@50keV : 7.52038E-04 ( -0.000153162 0.000146534 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 35.41 using 59 PHA bins.
# Reduced chi-squared = 0.6212 for 57 degrees of freedom
# Null hypothesis probability = 9.890023e-01
Photon flux (15-150 keV) in 69.64 sec: 0.112423 ( -0.0170652 0.017077 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.82778e-07 ( -8.95591e-08 9.28984e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.42158 ( )
Epeak [keV] : 153.791 ( )
Norm@50keV : 4.60468E-04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 35.01 using 59 PHA bins.
# Reduced chi-squared = 0.6251 for 56 degrees of freedom
# Null hypothesis probability = 9.874663e-01
Photon flux (15-150 keV) in 69.64 sec: 0.112486 ( -0.0171516 0.017005 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.79689e-07 ( -8.88001e-08 9.29478e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.665124 ( 1.41962 1.41962 )
beta : -2.03457 ( 2.01178 0.321372 )
Epeak [keV] : 20.8670 ( -22.8606 -22.8606 )
Norm@50keV : 0.113929 ( -0.11374 261.642 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 35.30 using 59 PHA bins.
# Reduced chi-squared = 0.6419 for 55 degrees of freedom
# Null hypothesis probability = 9.821003e-01
Photon flux (15-150 keV) in 69.64 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) = 1.45014e-07
S(50-100 keV) = 1.45761e-07
T90 vs. Hardness ratio plot
T90 = 55.2359999418259 sec.
Hardness ratio (energy fluence ratio) = 1.00515
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.768735
Count Ratio (50-100 keV) / (15-25 keV) = 0.452953
Mask shadow pattern
IMX = -2.398844059729363E-04, IMY = 1.658506732097355E-03
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:
-239.000000 -15.896000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9826 -15.6435 0.4 30.5 94.1 12.2555 26.9 0.3 Sco X-1
256.1989 -37.7820 8.2 21.3 40.4 0.3210 1.4 10.7 4U 1700-377
256.5839 -36.5339 5.1 20.4 43.0 0.5122 2.2 9.8 GX 349+2
262.9050 -24.5725 8.5 12.0 81.2 0.3017 1.4 11.8 GX 1+4
264.5659 -44.4308 16.8 21.7 15.3 -0.1647 -0.7 7.7 4U 1735-44
268.4143 -1.3679 5.4 24.7 153.8 0.5223 2.2 5.8 SW J1753.5-0127
270.2145 -24.9164 11.8 5.4 80.8 0.2267 1.0 10.5 GX 5-1
270.1547 -25.6757 69.3 5.4 72.8 -0.0389 -0.2 9.0 GRS 1758-258
274.0162 -14.0839 3.1 11.0 161.7 0.9217 3.7 2.9 GX 17+2
275.7559 -30.4415 5.3 5.6 -4.3 0.5166 2.2 9.8 H1820-303
285.0834 -25.0721 21.6 8.1 -94.2 -0.1304 -0.5 9.5 HT1900.1-2455
288.7978 10.9179 1.4 37.9 -166.9 2.4991 8.4 1.7 GRS 1915+105
263.0045 -33.8428 3.6 14.5 41.3 0.7614 3.3 0.9 GX 354-0
255.9214 -8.0098 2.6 25.6 120.2 1.3743 4.5 ------ UNKNOWN
265.8655 15.5862 3.3 41.7 157.6 1.5635 3.5 ------ UNKNOWN
307.7993 -32.7648 2.1 28.7 -74.2 1.6165 5.5 ------ UNKNOWN
308.9121 -2.9431 3.2 38.4 -127.0 1.3575 3.6 ------ UNKNOWN
312.1856 17.8840 5.0 55.3 -144.6 3.4781 2.3 ------ UNKNOWN
311.5532 21.2251 3.9 57.5 -147.7 5.4237 3.0 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-15.896000 53.744000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9772 -15.6634 1.2 30.5 94.0 1.8289 9.5 1.4 Sco X-1
255.7758 -37.9380 1359.6 21.6 40.5 -0.0009 -0.0 11.5 4U 1700-377
256.5891 -36.5192 5.6 20.4 43.0 -0.2453 -2.0 9.4 GX 349+2
262.8843 -24.5681 0.0 12.0 81.2 -0.1792 -1.6 12.6 GX 1+4
264.5081 -44.5523 78.2 21.8 15.2 -0.0174 -0.1 11.8 4U 1735-44
268.2959 -1.4324 5.6 24.6 153.5 -0.2499 -2.1 4.5 SW J1753.5-0127
270.0984 -25.1701 7.1 5.5 78.1 0.1718 1.6 11.5 GX 5-1
270.1829 -25.8756 5.2 5.5 70.7 0.2339 2.2 10.2 GRS 1758-258
273.8560 -14.0107 8.5 11.1 161.0 0.1399 1.3 8.9 GX 17+2
276.0737 -30.5352 0.0 5.7 -7.1 0.0896 0.8 12.7 H1820-303
284.9112 -25.0618 4.8 8.0 -94.3 0.2609 2.4 10.9 HT1900.1-2455
288.9162 10.8406 6.4 37.8 -166.7 -0.2470 -1.8 9.4 GRS 1915+105
263.1572 -33.8849 6.2 14.4 40.9 0.1980 1.9 8.9 GX 354-0
276.2224 -24.8743 1.6 0.1 -98.3 0.7643 7.1 ------ UNKNOWN
289.5791 -18.3283 2.5 14.1 -122.5 0.4754 4.6 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
-239.000000 363.084000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9871 -15.6418 0.6 30.5 94.1 19.6671 17.8 0.5 Sco X-1
256.1853 -37.8195 12.8 21.3 40.3 0.4819 0.9 9.5 4U 1700-377
256.5087 -36.5984 5.0 20.5 42.9 1.2575 2.3 11.1 GX 349+2
263.1146 -24.6293 11.7 11.8 81.0 0.4683 1.0 9.0 GX 1+4
264.5385 -44.4592 191.6 21.7 15.3 -0.0332 -0.1 8.8 4U 1735-44
268.2284 -1.5835 22.9 24.5 153.2 0.2887 0.5 11.5 SW J1753.5-0127
270.2508 -24.9222 3.9 5.3 80.8 1.6208 3.0 9.6 GX 5-1
270.1583 -25.6163 15.3 5.4 73.4 0.4267 0.8 10.9 GRS 1758-258
273.9828 -14.1230 4.5 10.9 161.5 1.5739 2.6 5.4 GX 17+2
275.7972 -30.4089 6.5 5.5 -4.6 1.0244 1.8 7.1 H1820-303
285.0369 -24.9207 17.2 8.1 -95.3 -0.3755 -0.7 0.0 HT1900.1-2455
288.7797 10.9377 2.8 37.9 -167.0 2.6695 4.1 1.2 GRS 1915+105
263.0765 -33.8105 4.0 14.4 41.3 1.5720 2.9 4.6 GX 354-0
247.2778 -11.1058 0.5 30.6 104.0 25.2723 23.3 ------ UNKNOWN
284.5334 -74.1101 3.2 49.4 -10.5 3.5174 3.6 ------ UNKNOWN
307.7874 -32.7954 2.5 28.7 -74.2 3.1194 4.5 ------ UNKNOWN
303.2222 27.7529 3.5 58.7 -159.4 12.2578 3.3 ------ UNKNOWN
337.0410 -74.9668 3.4 58.6 -22.9 10.2345 3.4 ------ UNKNOWN
312.1192 17.9599 6.7 55.4 -144.7 6.1399 1.8 ------ UNKNOWN
Plot creation:
Tue Apr 23 13:48:50 EDT 2013