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Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
266.6828 -32.1232 0.2454 24.6 124.5 0.8908 0.8 TRIG_00643078
------------------------------------------
Foreground time interval of the image:
0.000 107.460 (delta_t = 107.460 [sec])
109.000 808.000 (delta_t = 699.000 [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
Multiple GTIs in the spectrum
tstart tstop
0.000000 107.460000
109.000000 808.000000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.80614 ( -1.14732 2.4293 )
Norm@50keV : 7.05244E-05 ( -6.44904e-05 7.53409e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.79 using 59 PHA bins.
# Reduced chi-squared = 0.9262 for 57 degrees of freedom
# Null hypothesis probability = 6.335241e-01
Photon flux (15-150 keV) in 806.5 sec: 1.69043E-02 ( -0.0074337 0.00735671 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.28421e-07 ( -3.67934e-07 4.54972e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
0.000000 107.460000
109.000000 808.000000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.97365 ( )
Epeak [keV] : 1.60206 ( )
Norm@50keV : 1.94048E-04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.45 using 59 PHA bins.
# Reduced chi-squared = 0.9544 for 56 degrees of freedom
# Null hypothesis probability = 5.721410e-01
Photon flux (15-150 keV) in 806.5 sec: 1.65619E-02 ( -0.0071821 0.0077611 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.38556e-07 ( -3.77918e-07 4.44694e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
0.000000 107.460000
109.000000 808.000000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -9.92145 ( 9.92145 9.92145 )
beta : -2.80857 ( -2.43076 1.1488 )
Epeak [keV] : 3.17485 ( -3.17485 -3.17485 )
Norm@50keV : 9.56770E-03 ( -0.00876031 0.0102438 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.79 using 59 PHA bins.
# Reduced chi-squared = 0.9599 for 55 degrees of freedom
# Null hypothesis probability = 5.593846e-01
Photon flux (15-150 keV) in 806.5 sec: 2.20020E-02 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.06845e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 4.13076 (-2.16137 5.54508)
R^2/D10^2 : 0.320116 (-0.326368 31.1413)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.11 using 59 PHA bins.
# Reduced chi-squared = 0.9669 for 57 degrees of freedom
# Null hypothesis probability = 5.462472e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.738e-07 1.687e-07
25- 50 1.083e-07 8.158e-08
50-150 1.593e-09 2.167e-09
15-150 3.837e-07 2.605e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 19.6193 (-15.9332 -20.0481)
Norm : 0.199368 (-0.191379 4.98462)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.98 using 59 PHA bins.
# Reduced chi-squared = 0.9470 for 57 degrees of freedom
# Null hypothesis probability = 5.890395e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.453e-07 1.579e-07
25- 50 2.116e-07 1.486e-07
50-150 6.136e-08 5.738e-08
15-150 5.183e-07 3.389e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.98709 (-2.9862 3.0427)
R1^2/D10^2 : 1.60646 (-1.56489 -1.60646)
kT2 [keV] : 19.1514 (-19.0623 -19.1514)
R2^2/D10^2 : 4.29252E-04 (-0.000427104 0.00553365)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.85 using 59 PHA bins.
# Reduced chi-squared = 0.9427 for 55 degrees of freedom
# Null hypothesis probability = 5.958360e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.607e-07 1.459e-07
25- 50 1.542e-07 8.468e-08
50-150 3.250e-07 2.820e-07
15-150 7.399e-07 4.178e-07
Peak spectrum fit
Power-law model
Time interval is from 109.000 sec. to 808.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.80614 ( -1.14732 2.4293 )
Norm@50keV : 7.05244E-05 ( -6.44904e-05 7.53409e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.79 using 59 PHA bins.
# Reduced chi-squared = 0.9262 for 57 degrees of freedom
# Null hypothesis probability = 6.335241e-01
Photon flux (15-150 keV) in 806.5 sec: 1.69043E-02 ( -0.0074337 0.00735671 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.28421e-07 ( -3.67934e-07 4.54972e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 109.000 sec. to 808.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.97365 ( )
Epeak [keV] : 1.60206 ( )
Norm@50keV : 1.94048E-04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.45 using 59 PHA bins.
# Reduced chi-squared = 0.9544 for 56 degrees of freedom
# Null hypothesis probability = 5.721410e-01
Photon flux (15-150 keV) in 806.5 sec: 1.65619E-02 ( -0.0071821 0.0077611 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.38556e-07 ( -3.77918e-07 4.44694e-07 ) ergs/cm2
Band function
Time interval is from 109.000 sec. to 808.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -9.92145 ( 9.92145 9.92145 )
beta : -2.80857 ( -2.43076 1.1488 )
Epeak [keV] : 3.17485 ( -3.17485 -3.17485 )
Norm@50keV : 9.56770E-03 ( -0.00876031 0.0102438 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.79 using 59 PHA bins.
# Reduced chi-squared = 0.9599 for 55 degrees of freedom
# Null hypothesis probability = 5.593846e-01
Photon flux (15-150 keV) in 806.5 sec: 2.20020E-02 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.06845e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 4.13076 (-2.16137 5.54508)
R^2/D10^2 : 0.320116 (-0.326368 31.1413)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.11 using 59 PHA bins.
# Reduced chi-squared = 0.9669 for 57 degrees of freedom
# Null hypothesis probability = 5.462472e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.738e-07 1.786e-07
25- 50 1.083e-07 7.408e-08
50-150 1.593e-09 1.881e-09
15-150 3.837e-07 2.392e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 19.6193 (-15.9332 -20.0481)
Norm : 0.199368 (-0.191379 4.98462)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.98 using 59 PHA bins.
# Reduced chi-squared = 0.9470 for 57 degrees of freedom
# Null hypothesis probability = 5.890395e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.453e-07 1.560e-07
25- 50 2.116e-07 1.427e-07
50-150 6.136e-08 6.133e-08
15-150 5.183e-07 3.470e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.98709 (-2.03514 3.18423)
R1^2/D10^2 : 1.60646 (-1.56489 -1.60646)
kT2 [keV] : 19.1514 (-19.0623 -19.1514)
R2^2/D10^2 : 4.29252E-04 (-0.000427104 0.00579435)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.85 using 59 PHA bins.
# Reduced chi-squared = 0.9427 for 55 degrees of freedom
# Null hypothesis probability = 5.958360e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.607e-07 1.490e-07
25- 50 1.542e-07 9.275e-08
50-150 3.250e-07 2.482e-07
15-150 7.399e-07 3.997e-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: 2.80614 ( -1.14732 2.4293 )
Norm@50keV : 7.05244E-05 ( -6.44904e-05 7.53409e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.79 using 59 PHA bins.
# Reduced chi-squared = 0.9262 for 57 degrees of freedom
# Null hypothesis probability = 6.335241e-01
Photon flux (15-150 keV) in 806.5 sec: 1.69043E-02 ( -0.0074337 0.00735671 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.28421e-07 ( -3.67934e-07 4.54972e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.97365 ( )
Epeak [keV] : 1.60206 ( )
Norm@50keV : 1.94048E-04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.45 using 59 PHA bins.
# Reduced chi-squared = 0.9544 for 56 degrees of freedom
# Null hypothesis probability = 5.721410e-01
Photon flux (15-150 keV) in 806.5 sec: 1.65619E-02 ( -0.0071821 0.0077611 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.38556e-07 ( -3.77918e-07 4.44694e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -9.92145 ( 9.92145 9.92145 )
beta : -2.80857 ( -2.43076 1.1488 )
Epeak [keV] : 3.17485 ( -3.17485 -3.17485 )
Norm@50keV : 9.56770E-03 ( -0.00876031 0.0102438 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.79 using 59 PHA bins.
# Reduced chi-squared = 0.9599 for 55 degrees of freedom
# Null hypothesis probability = 5.593846e-01
Photon flux (15-150 keV) in 806.5 sec: 2.20020E-02 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.06845e-06 ( 0 0 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 2.11e-07
S(50-100 keV) = 1.20e-07
T90 vs. Hardness ratio plot
T90 = 808 sec.
Hardness ratio (energy fluence ratio) = 0.56872
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.576494
Count Ratio (50-100 keV) / (15-25 keV) = 0.302691
Mask shadow pattern
IMX = -2.596851311008535E-01, IMY = -3.777278491869774E-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 107.460000
109.000000 808.000000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.1300 -60.8088 42.2 41.1 -43.8 -0.3606 -0.3 12.4 Cen X-3
186.6968 -62.7544 1.3 33.1 -42.1 6.9877 8.6 1.5 GX 301-2
244.9843 -15.6368 0.6 38.3 81.2 88.8226 19.9 0.3 Sco X-1
256.1481 -37.7699 8.9 16.5 106.1 -1.1579 -1.3 8.9 4U 1700-377
256.2434 -36.2814 0.0 18.0 105.3 0.6040 0.6 12.6 GX 349+2
262.8436 -24.6645 6.9 30.6 112.3 3.0843 1.7 10.2 GX 1+4
264.7324 -44.3935 3.2 13.3 140.5 2.9076 3.6 3.4 4U 1735-44
270.3450 -25.0778 4.3 32.4 124.9 4.9855 2.7 3.3 GX 5-1
270.4704 -25.7733 7.9 31.8 125.6 2.4958 1.5 9.3 GRS 1758-258
275.9602 -30.2171 5.9 30.0 138.0 2.5866 1.9 9.2 H1820-303
284.8880 -24.9673 5.2 38.6 145.0 4.5015 2.2 8.5 HT1900.1-2455
262.8245 -33.8760 6.3 21.8 118.6 1.7794 1.8 8.6 GX 354-0
229.9642 -28.2436 2.3 29.5 51.0 6.3099 5.2 ------ UNKNOWN
201.7199 -32.8329 3.1 39.9 10.8 5.1667 3.7 ------ UNKNOWN
173.7123 -37.7953 4.4 52.9 -16.3 4.9439 2.6 ------ UNKNOWN
168.0331 -47.8256 3.3 49.3 -29.4 5.0581 3.5 ------ UNKNOWN
89.5462 -85.2088 3.7 40.8 -88.3 15.4966 3.1 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
953.400600 966.500600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9024 -15.6066 0.9 33.6 102.4 1.4157 13.5 4.9 Sco X-1
254.3238 35.2231 9.3 26.0 -19.1 0.0526 1.2 9.7 Her X-1
268.4576 -1.3213 4.8 38.1 55.6 -0.3013 -2.4 9.5 SW J1753.5-0127
229.9203 -15.3737 2.2 32.0 129.1 0.3981 5.2 ------ UNKNOWN
224.2349 -13.2302 2.0 31.2 140.2 0.3817 5.9 ------ UNKNOWN
265.4373 24.2191 1.9 30.2 11.0 0.2923 6.0 ------ UNKNOWN
175.7254 2.2335 2.4 59.2 -156.1 1.1614 4.9 ------ UNKNOWN
Plot creation:
Thu Jun 11 14:28:58 EDT 2015