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Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
280.3412 -4.9121 0.0195 33.4 -27.5 0.0338 9.8 TRIG_00421262
------------------------------------------
Foreground time interval of the image:
-0.008 0.020 (delta_t = 0.028 [sec])
Background time interval of the image:
-239.672 -0.008 (delta_t = 239.664 [sec])
Lightcurves
Notes:
- 1) All plots contain as much data as has been downloaded to date.
- 2) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
- 3) 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.
- 4) 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.
- 5) 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 0.016000
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 0.016000
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 0.016000
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 -0.008 sec. to 0.020 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 4.20576 ( -0.576049 0.921598 )
Norm@50keV : 4.53860E-03 ( -0.00453841 0.00337698 )
------------------------------------------------------------
# Chi-Squared = 111.02 using 59 PHA bins.
# Reduced chi-squared = 1.9478 for 57 degrees of freedom
# Null hypothesis probability = 2.438620e-05
Photon flux (15-150 keV) in 0.028 sec: 3.35608 ( -1.24693 1.24738 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.26371e-09 ( -1.24742e-09 1.26534e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.008 sec. to 0.020 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 3.46090E-03 ( )
------------------------------------------------------------
# Chi-Squared = 130.23 using 59 PHA bins.
# Reduced chi-squared = 2.3254 for 56 degrees of freedom
# Null hypothesis probability = 7.570894e-08
Photon flux (15-150 keV) in 0.028 sec: 5.59550 ( -1.4671 1.46606 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.26525e-09 ( -1.25522e-09 1.26608e-09 ) ergs/cm2
Band function
Time interval is from -0.008 sec. to 0.020 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.66010 ( )
beta : -2.48856 ( )
Epeak [keV] : 40.3208 ( )
Norm@50keV : 1.42077E-03 ( )
------------------------------------------------------------
# Chi-Squared = 130.02 using 59 PHA bins.
# Reduced chi-squared = 2.3640 for 55 degrees of freedom
# Null hypothesis probability = 5.142648e-08
Photon flux (15-150 keV) in 0.028 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] : 5.67628 (-0.757404 0.586846)
R^2/D10^2 : 27.6944 (-12.7869 22.0099)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 92.84 using 59 PHA bins.
# Reduced chi-squared = 1.629 for 57 degrees of freedom
# Null hypothesis probability = 1.899629e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.052e-09 1.023e-09
25- 50 2.691e-09 1.163e-09
50-150 1.952e-10 1.495e-10
15-150 5.938e-09 2.476e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 12.4744 (-2.73574 3.3959)
Norm : 104.368 (-40.5662 82.1447)
------------------------------------------------------------
# Chi-Squared = 102.60 using 59 PHA bins.
# Reduced chi-squared = 1.8000 for 57 degrees of freedom
# Null hypothesis probability = 2.023134e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.781e-09 1.359e-09
25- 50 1.572e-09 7.185e-10
50-150 1.876e-10 1.487e-10
15-150 4.541e-09 2.076e-09
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.73101 (-0.726181 0.616684)
R1^2/D10^2 : 26.6066 (-11.8679 22.8604)
kT2 [keV] : 0.118238 (13.1599 -0.118238)
R2^2/D10^2 : 0.105999 (-0.106055 -0.106055)
------------------------------------------------------------
# Chi-Squared = 92.83 using 59 PHA bins.
# Reduced chi-squared = 1.688 for 55 degrees of freedom
# Null hypothesis probability = 1.079017e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Peak spectrum fit
Power-law model
Time interval is from -0.492 sec. to 0.508 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.95834 ( -1.21279 2.37746 )
Norm@50keV : 1.06210E-03 ( -0.00106311 0.0015088 )
------------------------------------------------------------
# Chi-Squared = 66.86 using 59 PHA bins.
# Reduced chi-squared = 1.173 for 57 degrees of freedom
# Null hypothesis probability = 1.744674e-01
Photon flux (15-150 keV) in 1 sec: 0.284173 ( -0.176498 0.180199 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.25489e-08 ( -8.54205e-09 1.15884e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.492 sec. to 0.508 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -4.91200 ( )
Epeak [keV] : 22.5325 ( -8.0293 9.74445 )
Norm@50keV : 844.771 ( -844.707 560.609 )
------------------------------------------------------------
# Chi-Squared = 65.79 using 59 PHA bins.
# Reduced chi-squared = 1.175 for 56 degrees of freedom
# Null hypothesis probability = 1.740017e-01
Photon flux (15-150 keV) in 1 sec: 0.287567 ( -0.165479 0.165849 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from -0.492 sec. to 0.508 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.96850 ( 1.57865 1.57865 )
beta : -6.70725 ( 10 20 )
Epeak [keV] : 21.3596 ( -8.34008 -8.34008 )
Norm@50keV : 209.282 ( -209.286 5059.99 )
------------------------------------------------------------
# Chi-Squared = 65.80 using 59 PHA bins.
# Reduced chi-squared = 1.196 for 55 degrees of freedom
# Null hypothesis probability = 1.510060e-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] : 5.27131 (-2.3446 4.31747)
R^2/D10^2 : 2.02604 (-2.02619 32.264)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 66.02 using 59 PHA bins.
# Reduced chi-squared = 1.158 for 57 degrees of freedom
# Null hypothesis probability = 1.933374e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.059e-09 4.080e-09
25- 50 4.498e-09 3.259e-09
50-150 2.347e-10 2.684e-10
15-150 1.079e-08 7.910e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 18.2208 (-12.7764 71.3511)
Norm : 4.01306 (-4.01719 29.1817)
------------------------------------------------------------
# Chi-Squared = 66.39 using 59 PHA bins.
# Reduced chi-squared = 1.165 for 57 degrees of freedom
# Null hypothesis probability = 1.849349e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.726e-09 3.786e-09
25- 50 4.654e-09 3.645e-09
50-150 1.186e-09 1.549e-09
15-150 1.157e-08 8.040e-09
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.08261 (-5.08269 -5.08269)
R1^2/D10^2 : 2.24922 (-2.25244 -2.25244)
kT2 [keV] : 12.4616 (-12.9857 -12.9857)
R2^2/D10^2 : 5.73823E-03 (-0.0046908 -0.0046908)
------------------------------------------------------------
# Chi-Squared = 66.00 using 59 PHA bins.
# Reduced chi-squared = 1.200 for 55 degrees of freedom
# Null hypothesis probability = 1.470740e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.027e-09 5.510e-09
25- 50 4.590e-09 5.965e-09
50-150 7.687e-10 2.532e-09
15-150 1.139e-08 1.892e-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: 4.20576 ( -0.576049 0.921598 )
Norm@50keV : 4.53860E-03 ( -0.00453841 0.00337698 )
------------------------------------------------------------
# Chi-Squared = 111.02 using 59 PHA bins.
# Reduced chi-squared = 1.9478 for 57 degrees of freedom
# Null hypothesis probability = 2.438620e-05
Photon flux (15-150 keV) in 0.028 sec: 3.35608 ( -1.24693 1.24738 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.26371e-09 ( -1.24742e-09 1.26534e-09 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 3.46090E-03 ( )
------------------------------------------------------------
# Chi-Squared = 130.23 using 59 PHA bins.
# Reduced chi-squared = 2.3254 for 56 degrees of freedom
# Null hypothesis probability = 7.570894e-08
Photon flux (15-150 keV) in 0.028 sec: 5.59550 ( -1.4671 1.46606 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.26525e-09 ( -1.25522e-09 1.26608e-09 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.66010 ( )
beta : -2.48856 ( )
Epeak [keV] : 40.3208 ( )
Norm@50keV : 1.42077E-03 ( )
------------------------------------------------------------
# Chi-Squared = 130.02 using 59 PHA bins.
# Reduced chi-squared = 2.3640 for 55 degrees of freedom
# Null hypothesis probability = 5.142648e-08
Photon flux (15-150 keV) in 0.028 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) = 8.31068e-10
S(50-100 keV) = 1.80022e-10
T90 vs. Hardness ratio plot
T90 = 0.0239999890327454 sec.
Hardness ratio (energy fluence ratio) = 0.216615
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 2.12087
Count Ratio (50-100 keV) / (15-25 keV) = 1.27698
Mask shadow pattern
IMX = 5.860139337316449E-01, IMY = 3.049267773306944E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.016000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.016000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.016000
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:
-239.672000 -0.008000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9791 -15.6314 0.4 29.7 45.3 8.2738 25.7 0.5 Sco X-1
254.4570 35.3491 0.9 22.2 -143.3 2.7827 12.5 0.4 Her X-1
256.0114 -37.8623 1.1 51.2 27.5 11.4722 10.3 1.6 4U 1700-377
256.5411 -36.3533 29.9 49.8 26.7 0.3723 0.4 6.6 GX 349+2
263.0073 -24.7204 5.3 39.4 15.7 0.8064 2.2 1.5 GX 1+4
268.4575 -1.3657 3.2 21.9 -17.8 0.8091 3.6 7.5 SW J1753.5-0127
270.2436 -25.0670 3.6 42.2 6.6 1.1149 3.3 2.3 GX 5-1
270.3144 -25.7297 2.9 42.8 6.9 1.4009 4.0 1.0 GRS 1758-258
274.0162 -14.0302 88.0 34.9 -7.9 0.0373 0.1 0.7 GX 17+2
275.9753 -30.2622 6.5 49.2 3.9 0.9109 1.8 6.8 H1820-303
285.0009 -24.9875 52.4 49.9 -8.6 -0.1145 -0.2 4.5 HT1900.1-2455
288.7658 10.8449 3.3 36.0 -58.8 1.4219 3.4 6.3 GRS 1915+105
204.1775 51.5829 3.0 54.2 176.8 3.7123 3.9 ------ UNKNOWN
231.8292 62.5924 2.4 51.4 -160.3 2.6611 4.7 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-0.008000 0.020000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
245.0487 -15.6284 7.5 29.7 45.2 0.0057 1.5 4.1 Sco X-1
254.2492 35.3430 7.5 22.2 -143.8 -0.0045 -1.5 10.2 Her X-1
255.9505 -37.9694 5.6 51.3 27.5 -0.0233 -2.1 7.7 4U 1700-377
256.2192 -36.3609 3.9 49.8 27.1 -0.0291 -3.0 11.1 GX 349+2
263.1965 -24.7750 9.6 39.5 15.5 0.0050 1.2 10.4 GX 1+4
268.1803 -1.3913 4.7 21.7 -17.3 0.0063 2.5 11.8 SW J1753.5-0127
270.3109 -25.1782 3.8 42.3 6.6 0.0136 3.0 6.1 GX 5-1
270.2770 -25.8992 4.7 43.0 7.1 0.0115 2.5 9.5 GRS 1758-258
274.1896 -14.0988 0.0 35.0 -8.1 0.0036 1.1 11.3 GX 17+2
275.9784 -30.2657 3.2 49.2 3.9 0.0224 3.6 6.7 H1820-303
285.0530 -24.8636 3.9 49.9 -8.8 0.0168 3.0 3.5 HT1900.1-2455
288.7115 10.7496 0.0 35.9 -58.6 -0.0068 -1.4 12.8 GRS 1915+105
280.3411 -4.9121 1.2 33.4 -27.5 0.0339 9.8 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
Plot creation:
Thu May 6 17:06:23 EDT 2010