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Observation ID Observation Date Target Star Name Object Class Spectral Type B-V Magnitude RA (deg) DEC (deg) Exposure (s)
8319 2007-04-15 04:24:06 Capella HD 34029 Non-eclipsing spectroscopic binary G5IIIe+... 0.8000 79.172510 45.997140 59146.55

Chandra Configuration for the Observation

Zeroth-Order Image

Image File Missing: Snapshot of the Zeroth-Order Image
Zeroth-Order Events Zeroth-Order Count Rate (cts/s) Pileup
20654 0.3492 severe
The zeroth-order image for Capella

Hardness Ratios and Quantiles

Hardness ratios and quantiles are calculated from the predicted ACIS-S or ACIS-I aimpoint spectra, as indicated.
Hardness Ratios
Aimpoint HR1 = (H-M)/(H+M) HR2 = (M-S)/(M+S) HR3 = (H-S)/(H+S)
ACIS-S -0.772 -0.159 -0.829
ACIS-I -0.742 0.012 -0.737
S, M, and H represent the predicted total counts in the following passbands:
S: 0.3-0.9 keV
M: 0.9-1.5 keV
H: 1.5-8.0 keV
Quantiles
Aimpoint Quantiles 25 % 25 % Error 50 % 50 % Error 75 % 75 % Error
ACIS-S keV 0.767 7.234 0.883 7.117 1.029 0.000
Q-norm 0.061 0.939 0.076 0.924 0.095 0.000
ACIS-I keV 0.810 7.190 0.927 7.073 1.117 6.883
Q-norm 0.066 0.934 0.081 0.919 0.106 0.894
Normalized quantiles (Q-norm) are defined as:
Qx = (Ex - Elo)/(Ehi - Elo)
Where Elo = 0.3 keV and Ehi = 8.0 keV.
Hardness Ratio plots and Quantile-based Color-Color DiagramsX-Atlas Hardness Ratios and Quantiles Listing

Spectral Metrics

A series of line-line, line-continuum, and continuum-continuum ratios calculated from the high-resolution 1st order MEG or LEG spectrum.
Line-Line Ratios
Ne X / O VIII Ne2O Error O VII(i) / O VII(f) Oif Error O VII(r) / O VIII O78 Error O VIII / Fe XVII O8Fe Error Mg XII / Fe XVII Mg2Fe Error Si XIV / Fe XVII Si2Fe Error S XV / Fe XVII S2Fe Error
1.1636 0.5409 0.2786 0.1151 0.1938 0.1014 0.0556 0.0206 0.0284 0.0070 0.0117 0.0028 0.0044 0.0016

short line / cont
Line-Continuum & Continuum-Continuum Ratios
sl2c Error long line / cont ll2c Error line / cont l2c Error cont long / cont short cl2cs Error cont long / cont med cl2cm Error cont med / cont short cm2cs Error
0.0007 0.0000 0.0018 0.0001 0.0026 0.0001 0.0140 0.0000 0.0140 0.0000 2163.5535 3.9740
X-Atlas Spectral Metrics Listing

Spectral Fits

Aimpoint Model nH (1022/cm3) nH error kT (keV) kT error kT2 (keV) kT2 error Abundance (solar) Abundance error Flux (ergs/cm2/s) Flux Emission Ratio (kT2/kT1) Reduced Chi2 DoF
X-Atlas Spectral Fits Listing

LETG Light Curve

Image File Missing: LETG Light Curve
GLvary
Odds-2.151
Prob.0.007
Var. Index0
LETG light curve for Capella, constructed from all ±1st, ±2nd, and ±3rd order LETG events.

LETG LEG Spectrum

Image File Missing: High-Resolution 1st Order LEG spectrum of obsid 8319
High-Resolution 1st Order LEG Spectrum for Capella

X-Atlas Data Products

Spectral Data
PHA II LEG ±1st Order PHA LEG ±1st Order gARF [Counts/s/Å] FITS [Counts/s/Å] text [ph/s/Å/cm2] FITS [ph/s/Å/cm2] text
Standard Data Products (Cycle 06)
Aimpoint ARFAimpoint RMF
ACIS-SACIS-IACIS-SACIS-I
Retrieve observation data from the Chandra Data Archive: WebChaSeR
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