Click here for the BAT GCN circular template
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
74.7542 -54.9953 0.0344 12.5 -133.9 0.0145 5.6 TRIG_00381434
------------------------------------------
Foreground time interval of the image:
0.000 0.064 (delta_t = 0.064 [sec])
Background time interval of the image:
-60.416 -5.416 (delta_t = 55.000 [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 0.064000
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 0.064000
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 0.064000
SN=5 or 10 sec. binning (whichever binning is satisfied first)
SN=5 or 10 sec. binning (T < 200 sec)
Flight mask-tagged light curves
Caution: Mask-weight map is always using the same on-axis map
Quad-rate summed light curves (from T0-300 to T0+1000)
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 0.064 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.21421 ( -1.51262 1.19628 )
Norm@50keV : 7.35405E-03 ( -0.00359414 0.00359353 )
------------------------------------------------------------
# Chi-Squared = 64.90 using 59 PHA bins.
# Reduced chi-squared = 1.139 for 57 degrees of freedom
# Null hypothesis probability = 2.205216e-01
Photon flux (15-150 keV) in 0.064 sec: 0.864797 ( -0.864812 0.439901 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.75804e-09 ( -4.75804e-09 2.75414e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.46956 ( )
Epeak [keV] : 154.955 ( )
Norm@50keV : 1.88304E-03 ( )
------------------------------------------------------------
# Chi-Squared = 64.66 using 59 PHA bins.
# Reduced chi-squared = 1.155 for 56 degrees of freedom
# Null hypothesis probability = 2.000546e-01
Photon flux (15-150 keV) in 0.064 sec: 0.864339 ( -0.864339 0.439801 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.7571e-09 ( -4.7571e-09 2.75618e-09 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.986906 ( 0.987095 0.987095 )
beta : -1.21307 ( 1.2128 1.51208 )
Epeak [keV] : 47.2155 ( -46.7293 -46.7293 )
Norm@50keV : 1.31120E-02 ( -0.0131235 12432.8 )
------------------------------------------------------------
# Chi-Squared = 64.90 using 59 PHA bins.
# Reduced chi-squared = 1.180 for 55 degrees of freedom
# Null hypothesis probability = 1.696149e-01
Photon flux (15-150 keV) in 0.064 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.23848 ( -1.4554 1.18229 )
Norm@50keV : 7.41772E-03 ( -0.00391826 0.00358653 )
------------------------------------------------------------
# Chi-Squared = 65.46 using 59 PHA bins.
# Reduced chi-squared = 1.148 for 57 degrees of freedom
# Null hypothesis probability = 2.065871e-01
Photon flux (15-150 keV) in 0.064 sec: 0.875520 ( -0.442543 0.438581 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.76751e-09 ( -4.76745e-09 2.7516e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.48614 ( )
Epeak [keV] : 159.912 ( )
Norm@50keV : 1.90828E-03 ( )
------------------------------------------------------------
# Chi-Squared = 65.20 using 59 PHA bins.
# Reduced chi-squared = 1.164 for 56 degrees of freedom
# Null hypothesis probability = 1.873416e-01
Photon flux (15-150 keV) in 0.064 sec: 0.875078 ( -0.44246 0.438452 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.76637e-09 ( -4.76637e-09 2.75363e-09 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.01283 ( 1.01293 1.01293 )
beta : -1.23683 ( 1.23717 1.45486 )
Epeak [keV] : 40.8275 ( -40.8525 -40.8525 )
Norm@50keV : 1.35385E-02 ( -0.0135419 0.477236 )
------------------------------------------------------------
# Chi-Squared = 65.46 using 59 PHA bins.
# Reduced chi-squared = 1.190 for 55 degrees of freedom
# Null hypothesis probability = 1.578571e-01
Photon flux (15-150 keV) in 0.064 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
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: 1.21421 ( -1.51262 1.19628 )
Norm@50keV : 7.35405E-03 ( -0.00359414 0.00359353 )
------------------------------------------------------------
# Chi-Squared = 64.90 using 59 PHA bins.
# Reduced chi-squared = 1.139 for 57 degrees of freedom
# Null hypothesis probability = 2.205216e-01
Photon flux (15-150 keV) in 0.064 sec: 0.864797 ( -0.864812 0.439901 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.75804e-09 ( -4.75804e-09 2.75414e-09 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.46956 ( )
Epeak [keV] : 154.955 ( )
Norm@50keV : 1.88304E-03 ( )
------------------------------------------------------------
# Chi-Squared = 64.66 using 59 PHA bins.
# Reduced chi-squared = 1.155 for 56 degrees of freedom
# Null hypothesis probability = 2.000546e-01
Photon flux (15-150 keV) in 0.064 sec: 0.864339 ( -0.864339 0.439801 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.7571e-09 ( -4.7571e-09 2.75618e-09 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.986906 ( 0.987095 0.987095 )
beta : -1.21307 ( 1.2128 1.51208 )
Epeak [keV] : 47.2155 ( -46.7293 -46.7293 )
Norm@50keV : 1.31120E-02 ( -0.0131235 12432.8 )
------------------------------------------------------------
# Chi-Squared = 64.90 using 59 PHA bins.
# Reduced chi-squared = 1.180 for 55 degrees of freedom
# Null hypothesis probability = 1.696149e-01
Photon flux (15-150 keV) in 0.064 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) = 1.00702e-09
S(50-100 keV) = 1.73793e-09
T90 vs. Hardness ratio plot
T90 = 0.0640000104904175 sec.
Hardness ratio (energy fluence ratio) = 1.72581
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.513854
Count Ratio (50-100 keV) / (15-25 keV) = 1.72607
Mask shadow pattern
IMX = 0, IMY = 0
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.064000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.064000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.064000
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:
-60.416000 -5.416000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.5143 -40.6664 3.8 49.3 177.7 0.5456 3.0 6.7 Vela X-1
160.8036 -52.5541 3.1 58.7 -159.2 1.7179 3.8 ------ UNKNOWN
163.4017 -54.6262 2.1 58.9 -156.2 2.7037 5.5 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
0.000000 0.064000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.7168 -40.5940 13.9 49.4 177.7 -0.0051 -0.8 8.9 Vela X-1
74.7535 -54.9963 2.1 12.5 -133.9 0.0145 5.6 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
43.784600 302.686400
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.4945 -40.4480 12.9 41.8 164.3 0.3155 0.9 6.6 Vela X-1
170.3351 -60.5559 14.2 46.7 -153.7 -0.3538 -0.8 4.1 Cen X-3
186.6283 -62.7582 3.9 50.9 -144.6 2.0705 3.0 1.1 GX 301-2
36.4312 -30.5215 2.8 36.6 4.7 1.0827 4.1 ------ UNKNOWN
57.3180 -59.3434 3.3 10.4 -53.1 0.6029 3.5 ------ UNKNOWN
165.5873 -41.8585 4.0 57.3 -173.7 2.4114 2.9 ------ UNKNOWN
24.6075 -38.2748 2.0 37.3 -16.1 1.4177 5.7 ------ UNKNOWN
9.7438 -40.6159 2.8 44.2 -30.6 1.4479 4.2 ------ UNKNOWN
181.7494 -50.9414 4.1 57.9 -156.8 3.4391 2.9 ------ UNKNOWN
325.2212 -76.8572 3.0 41.0 -92.4 3.4485 3.8 ------ UNKNOWN
Plot creation:
Mon Feb 15 14:53:37 EST 2010