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Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
280.3250 -4.9416 0.0104 16.4 -22.7 0.0780 18.5 TRIG_00649113
------------------------------------------
Foreground time interval of the image:
0.000 0.044 (delta_t = 0.044 [sec])
Background time interval of the image:
-143.635 0.000 (delta_t = 143.635 [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 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 0.000 sec. to 0.044 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.45462 ( -0.14921 0.164124 )
Norm@50keV : 7.08663E-02 ( -0.00938762 0.00919275 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 83.95 using 59 PHA bins.
# Reduced chi-squared = 1.473 for 57 degrees of freedom
# Null hypothesis probability = 1.161310e-02
Photon flux (15-150 keV) in 0.044 sec: 13.5438 ( -1.37632 1.37674 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.08124e-08 ( -3.39405e-09 3.40914e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.044 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.135225 ( -1.05977 0.854474 )
Epeak [keV] : 38.4054 ( -5.14182 4.32669 )
Norm@50keV : 1.86522 ( -1.86534 5.4461 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.25 using 59 PHA bins.
# Reduced chi-squared = 0.8616 for 56 degrees of freedom
# Null hypothesis probability = 7.596526e-01
Photon flux (15-150 keV) in 0.044 sec: 13.5757 ( -1.3801 1.3822 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.25463e-08 ( -3.45906e-09 3.50033e-09 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.044 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.130671 ( -0.899235 1.03468 )
beta : -10.0000 ( 10 7.10543e-15 )
Epeak [keV] : 38.4294 ( -5.17365 4.1249 )
Norm@50keV : 1.85097 ( -1.851 5.46617 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.25 using 59 PHA bins.
# Reduced chi-squared = 0.8773 for 55 degrees of freedom
# Null hypothesis probability = 7.281790e-01
Photon flux (15-150 keV) in 0.044 sec: 13.6972 ( -6.6972 -2.1124 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.25688e-08 ( -3.25685e-08 -3.45479e-09 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 10.2275 (-0.867156 0.907515)
R^2/D10^2 : 6.57367 (-1.88676 2.68563)
(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 = 6.386508e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.207e-09 1.019e-09
25- 50 1.593e-08 1.624e-09
50-150 8.868e-09 1.998e-09
15-150 3.100e-08 3.458e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 43.8895 (-7.11011 8.47144)
Norm : 88.3387 (-12.4614 14.304)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.44 using 59 PHA bins.
# Reduced chi-squared = 1.008 for 57 degrees of freedom
# Null hypothesis probability = 4.586840e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.189e-09 1.170e-09
25- 50 1.256e-08 1.254e-09
50-150 1.073e-08 2.484e-09
15-150 3.248e-08 3.568e-09
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.09896 (-0.976351 1.58964)
R1^2/D10^2 : 4438.44 (-4309.51 1.74075e+06)
kT2 [keV] : 11.0362 (-1.05695 1.25359)
R2^2/D10^2 : 4.57332 (-1.75628 1.89482)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.33 using 59 PHA bins.
# Reduced chi-squared = 0.7696 for 55 degrees of freedom
# Null hypothesis probability = 8.945772e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.845e-09 2.342e-09
25- 50 1.464e-08 2.248e-09
50-150 1.004e-08 2.222e-09
15-150 3.253e-08 5.722e-09
Peak spectrum fit
Power-law model
Time interval is from -0.476 sec. to 0.524 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.77248 ( -0.286996 0.302036 )
Norm@50keV : 5.64067E-03 ( -0.00113739 0.00111585 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.51 using 59 PHA bins.
# Reduced chi-squared = 1.149 for 57 degrees of freedom
# Null hypothesis probability = 2.055657e-01
Photon flux (15-150 keV) in 1 sec: 0.769118 ( -0.137604 0.137723 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.19946e-08 ( -1.05515e-08 1.08339e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.476 sec. to 0.524 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.72653 ( -3.55568 2.23412 )
Epeak [keV] : 44.0429 ( -6.01772 6.90206 )
Norm@50keV : 0.550766 ( -0.748994 57.1967 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.66 using 59 PHA bins.
# Reduced chi-squared = 1.012 for 56 degrees of freedom
# Null hypothesis probability = 4.501204e-01
Photon flux (15-150 keV) in 1 sec: 0.689531 ( -0.139574 0.142578 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.09585e-08 ( -8.4201e-09 1.01177e-08 ) ergs/cm2
Band function
Time interval is from -0.476 sec. to 0.524 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.55514 ( -1.95455 -1.63414 )
beta : -4.19398 ( 4.155 1.85731 )
Epeak [keV] : 44.3699 ( -8.10724 8.56344 )
Norm@50keV : 0.436396 ( -0.622932 25.6387 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.35 using 59 PHA bins.
# Reduced chi-squared = 1.024 for 55 degrees of freedom
# Null hypothesis probability = 4.242934e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 4.27738e-08 ( -4.27668e-08 -9.6467e-09 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 11.3399 (-1.61656 1.92191)
R^2/D10^2 : 0.251323 (-0.113538 0.19532)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.62 using 59 PHA bins.
# Reduced chi-squared = 0.9933 for 57 degrees of freedom
# Null hypothesis probability = 4.893674e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.789e-09 2.060e-09
25- 50 1.995e-08 4.890e-09
50-150 1.483e-08 5.570e-09
15-150 4.157e-08 1.047e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 89.4880 (-36.9576 104.026)
Norm : 3.57475 (-0.794567 1.03447)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.66 using 59 PHA bins.
# Reduced chi-squared = 1.099 for 57 degrees of freedom
# Null hypothesis probability = 2.825430e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.326e-09 2.128e-09
25- 50 1.575e-08 3.880e-09
50-150 2.390e-08 1.617e-08
15-150 4.898e-08 2.203e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 0.708839 (-0.704299 2.70117)
R1^2/D10^2 : 4.60630E+07 (-5.81642e+07 7.65134e+13)
kT2 [keV] : 11.5012 (-1.66667 2.00346)
R2^2/D10^2 : 0.235858 (-0.109356 0.175816)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.91 using 59 PHA bins.
# Reduced chi-squared = 1.016 for 55 degrees of freedom
# Null hypothesis probability = 4.406206e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.708e-09 2.117e-09
25- 50 1.964e-08 6.104e-09
50-150 1.517e-08 6.427e-09
15-150 4.152e-08 1.007e-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: 2.45462 ( -0.14921 0.164124 )
Norm@50keV : 7.08663E-02 ( -0.00938762 0.00919275 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 83.95 using 59 PHA bins.
# Reduced chi-squared = 1.473 for 57 degrees of freedom
# Null hypothesis probability = 1.161310e-02
Photon flux (15-150 keV) in 0.044 sec: 13.5438 ( -1.37632 1.37674 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.08124e-08 ( -3.39405e-09 3.40914e-09 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.135225 ( -1.05977 0.854474 )
Epeak [keV] : 38.4054 ( -5.14182 4.32669 )
Norm@50keV : 1.86522 ( -1.86534 5.4461 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.25 using 59 PHA bins.
# Reduced chi-squared = 0.8616 for 56 degrees of freedom
# Null hypothesis probability = 7.596526e-01
Photon flux (15-150 keV) in 0.044 sec: 13.5757 ( -1.3801 1.3822 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.25463e-08 ( -3.45906e-09 3.50033e-09 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.130671 ( -0.899235 1.03468 )
beta : -10.0000 ( 10 3.55271e-15 )
Epeak [keV] : 38.4294 ( -5.17365 4.1249 )
Norm@50keV : 1.85097 ( -1.851 5.46617 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.25 using 59 PHA bins.
# Reduced chi-squared = 0.8773 for 55 degrees of freedom
# Null hypothesis probability = 7.281790e-01
Photon flux (15-150 keV) in 0.044 sec: 13.6972 ( -6.6972 -2.1124 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.25688e-08 ( -3.25685e-08 -3.45479e-09 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 1.02e-08
S(50-100 keV) = 7.42e-09
T90 vs. Hardness ratio plot
T90 = 0.0399999618530273 sec.
Hardness ratio (energy fluence ratio) = 0.727451
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.27464
Count Ratio (50-100 keV) / (15-25 keV) = 0.43198
Mask shadow pattern
IMX = 2.713691546840722E-01, IMY = 1.136009187271291E-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:
-143.635400 0.000000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9885 -15.6767 1.1 38.0 -95.9 4.6677 10.9 2.2 Sco X-1
256.0309 -37.8566 1.9 30.1 -137.7 1.0985 6.1 2.2 4U 1700-377
256.4896 -36.4780 4.1 29.2 -135.5 0.5097 2.8 4.2 GX 349+2
262.9370 -24.5779 17.0 20.5 -111.7 0.1006 0.7 10.8 GX 1+4
264.8765 -44.6142 7.7 29.0 -156.8 0.2422 1.5 11.4 4U 1735-44
268.4510 -1.5391 4.2 25.0 -48.6 0.4514 2.7 7.2 SW J1753.5-0127
270.3483 -25.2432 7.3 14.0 -118.2 0.2246 1.6 10.4 GX 5-1
270.4328 -25.7835 4.0 14.1 -120.4 0.4616 3.3 7.4 GRS 1758-258
273.8851 -14.0639 4.2 12.4 -65.8 0.3779 2.8 7.2 GX 17+2
275.9351 -30.2168 4.3 12.4 -148.5 0.3727 2.7 9.0 H1820-303
285.0522 -25.0732 4.5 4.3 169.9 0.3571 2.6 9.2 HT1900.1-2455
288.7910 11.0974 17.6 32.1 0.6 -0.1145 -0.7 9.1 GRS 1915+105
262.9679 -33.9080 2.9 23.3 -135.7 0.6111 4.0 4.5 GX 354-0
246.2171 -60.2839 2.7 47.9 -162.2 1.2836 4.3 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
0.000000 0.044000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9169 -15.5940 9.8 38.1 -95.8 -0.0162 -1.2 4.6 Sco X-1
256.0945 -38.0409 0.0 30.2 -138.0 0.0113 2.0 12.9 4U 1700-377
256.3566 -36.5072 6.0 29.3 -135.4 0.0104 1.9 6.3 GX 349+2
262.9912 -24.6902 5.5 20.5 -112.0 -0.0102 -2.1 3.5 GX 1+4
264.7835 -44.4474 4.4 28.9 -156.5 0.0121 2.6 1.7 4U 1735-44
268.2954 -1.3841 3.3 25.2 -48.6 0.0179 3.5 6.0 SW J1753.5-0127
270.1608 -24.9744 8.1 14.1 -117.0 -0.0062 -1.4 9.2 GX 5-1
270.1539 -25.6558 27.6 14.3 -119.6 -0.0018 -0.4 9.6 GRS 1758-258
273.8677 -14.0166 4.4 12.4 -65.6 0.0112 2.6 8.1 GX 17+2
275.9104 -30.3941 151.8 12.5 -148.9 0.0003 0.1 1.8 H1820-303
284.9283 -24.7580 9.0 4.0 171.3 -0.0052 -1.3 11.4 HT1900.1-2455
288.7265 10.8027 5.7 31.8 0.6 -0.0106 -2.0 9.6 GRS 1915+105
263.1199 -33.7200 7.6 23.1 -135.4 0.0073 1.5 9.5 GX 354-0
282.2395 -74.6184 2.0 53.9 174.0 0.0960 5.9 ------ UNKNOWN
279.7957 -35.1063 2.4 15.0 -170.9 0.0199 4.9 ------ UNKNOWN
280.3250 -4.9416 0.6 16.4 -22.7 0.0780 18.5 ------ UNKNOWN
265.3138 -45.0525 2.3 29.1 -157.9 0.0227 5.0 ------ UNKNOWN
258.2925 -18.3230 2.2 25.1 -95.8 0.0289 5.3 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
77.364590 553.943000
555.064000 962.104000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9767 -15.6390 0.2 36.4 -160.7 40.9672 50.9 0.2 Sco X-1
256.0671 -37.9472 4.2 39.7 159.6 3.4299 2.7 7.3 4U 1700-377
256.4611 -36.3924 13.0 38.4 160.8 1.0234 0.9 2.2 GX 349+2
262.9452 -24.8205 3.9 26.0 167.4 2.1978 2.9 5.7 GX 1+4
264.6487 -44.5872 6.8 42.0 145.9 2.8240 1.7 9.2 4U 1735-44
268.4312 -1.4900 5.8 12.4 -125.2 1.2907 2.0 4.4 SW J1753.5-0127
270.2591 -24.9235 6.0 22.2 154.0 1.3274 1.9 9.4 GX 5-1
270.3772 -25.7406 2.8 22.9 152.8 2.9019 4.1 4.0 GRS 1758-258
274.0640 -14.0153 2.2 11.0 163.0 3.1583 5.3 3.6 GX 17+2
275.8526 -30.2715 3.9 25.7 138.1 2.3657 2.9 6.8 H1820-303
285.0364 -24.9544 17.0 20.5 116.9 -0.4826 -0.7 2.0 HT1900.1-2455
288.7717 10.7438 0.0 17.8 -22.9 -0.7565 -1.2 12.2 GRS 1915+105
299.5930 35.2026 0.7 44.0 -28.1 20.0028 17.0 0.1 Cyg X-1
308.1927 40.9295 3.9 52.5 -24.5 5.3643 2.9 4.0 Cyg X-3
262.9597 -33.6995 11.7 33.0 156.3 -1.0633 -1.0 8.2 GX 354-0
317.3312 -23.8407 3.3 40.3 70.8 8.8452 3.6 ------ UNKNOWN
Plot creation:
Sat Aug 8 01:29:10 EDT 2015