XRCF Source Spectral Analysis

• return to HETG at XRCF page

June 17, '99 Final Version Automated analysis results of HSI-grating data sets. HRMA, Grating, HSI calibration files are from CALDB-Cal area, specific file names are given in the source code. The HSI data are corrected for the HSI QE depression and "tile plots" are made to show this effect. MARX-compatible modeled source-spectra files are available The source model is via dd's kludgy IDL routines: xss_sim.pro. ( Jan.2 '98 version of these analyses is still available for comparison here .)

• Carbon continuum analysis and XSPEC fitting
• Some manual analysis of EIPS Targets
  • Ag La
  • Al Ka
  • B Ka
  • Be Ka
  • C Ka
  • Cr Ka
  • Cu Ka,La
  • Fe Ka,La
  • Mg Ka
  • Mo La
  • Nb La
  • Ni La
  • O Ka
  • Si Ka
  • Sn La
  • Ti Ka,La
• Other Source info
  • Stability
• Other Source Pages
  • Bearden Catalog from Project Science
  • Project Science: EIPS Spot Images
  • XRCF Beam Uniformity Tests Analysis by Everett, Jerius, Pease, Drake, and Freeman (on an ASC local web page).
  • Project Science Catalog of EIPS Spectra
  • Project Science (Martin Sulkanen) First-order Y Beam Uniformity Variations
  • Project Science (Ron Elsner) Beam Uniformity figures
  • Pete Ratzlaff's dispersion histograms for all LETG-HSI data sets!

Al Anode

The Al anode produces Al K-alpha, "satellite lines", Al-K beta as well as contaminating C and O lines.

• MEG-HSI +3rd order Al image and spectrum, from D-HXH-FC-28.003, 970109, hsi108034i0.fits. Centered in the image is the 3rd order Al K-alpha line with the satellite line blend just to its left and K-beta further to left. The source here has an Alx2 filter in place and the filter cutoff is seen as well.

Be Anode

The Be anode produces a big broad Be K-alpha line, and probably contaminating C and O lines.

• LETG-HSI spectrum D-LXH-3D-12.004 of the Be anode with Bex2 filter agrees pretty well (see comparison in automated analysis) with a single line having an E/dE_FWHM of 12.

C Anode

The C anode produces a big broad C K-alpha line, and probably contaminating O line.

• LETG-HSI spectrum D-LXH-3D-11.047 of the C anode with C8H8x2 filter agrees pretty well (see comparison in automated analysis) with a line which is made up of two gaussian components: one at 1.002 times the C-K energy (with E/dE_FWHM = 30), and one at 0.965 times the C-K energy (with E/dE_FWHM = 25) and 0.085 times the area of the first.

Cu Anode

• Cu-L

  The Cu anode run at low voltage produces Cu-L alpha and beta lines, a slightly longer wavelength Cu? line and probably O-K and C-K lines as well. The Cu-L lines have an intrinsic E/dE of ~ 220 as measured with the HEG.

  Name	Energy	Wavelength	Relative Intensity
  Cu L-a	0.9297	13.336	1.0
  Cu L-b	0.9498	13.054	0.253
  Cu ?	0.8086	15.33	0.095
  continuum	~0.9 keV		0.154 / 0.1 keV

  • Cu-L no filter LEG HSI image and spectrum
  • Cu-L no filter LEG HSI histogram with model, note that the observed line width here has a contribution from the LEG resolving power (line and LEG are both around E/dE 200.) [Model/data bins are not matched so continuum levels are not expected to agree.]
  • Cu-L no filter MEG HSI image and spectrum
  • Cu-L no filter HEG HSI image and spectrum

• Cu-K

Fe Anode

• Fe-L

  Data in table below is from Peter Predehl. Fe-L lines look to have E/dE around 200 (to be better measured.)

  Name	Energy	Wavelength	Relative Intensity
  Fe L alpha	0.7053	17.58	1.00
  Fe L beta1	0.7183	17.26	0.20
  Fe L beta3,4	0.7922	15.65	0.005
  Fe L ?	0.6612	18.75	0.02
  Fe L ?	0.6153	20.15	0.08

  • Fe-L LEG-HSI image/spectrum (and data file ) from D-LXH-3D-11.030, 970110, hsi108157i0.fits.
  • Fe-L MEG-HSI image/spectrum (and data file ) from D-HXH-3D-11.031, 970110, hsi108158i0.fits.

• Fe-K

  Name	Energy	Wavelength	Relative Intensity
  Fe K alpha	6.40		1.0000
  Fe K beta	7.06		0.002 guess

Mg Anode

The Mg anode produces Mg K-alpha, "satellite lines", Mg-K beta as well as contaminating C and O lines.

• LEG-HSI +5th order Mg(+C+O) image and histogram, from D-LXH-dF-16.001, 970116, hsi109001i2.fits. Centered in the image is the 5th order Mg K-alpha line with the satellite lines blended just to its left. The 1st order C-K line, broad one at left, has E/dE ~ 30, the 2nd order O-K line has E/dE ~ 120 in its core (see O-K below, however.)
• HEG-HSI +2nd order Mg histogram, from D-HXH-dF-16.003, 970116, hsi109003i2.fits. The two satellite lines are resolved (at energies 1.0065 and 1.0077 from the K-alpha) and the as-observed E/dE of the K-alpha line is ~1080.

Mo Anode

The Mo anode produces Mo L-alpha, beta, Mo M line, as well as contaminating C and O lines. The HEG-HSI spectrum below suggests an E/dE of ~300 for the L lines. Two weak lines (2.45 keV and 1.98 keV) are seen also.

• Mo-Mox2 MEG HSI image and spectrum from D-HXH-3D-23.034, 970125/hsi110151i0.fits.
• Mo-Mox2 HEG HSI image and spectrum from D-HXH-3D-23.035, 970125/hsi110154i0.fits.
• Mo-Mox2 HEG HSI histogram with source model over plotted. Additional lines around 2.45 keV (bin 406) and 1.98 keV (bin 650) are visible above the continuum.
• X-GEF SSD data gives for Mo La/(La+Lb) ~ 0.72, compared with 1.0/1.444 = 0.693 measured here - pretty good agreement actually!

O Anode (SiO)

The SiO anode, run at ~1.7 keV, produces the O-K line, continuum, and possibly contaminating C line. The LEG-HSI spectrum and HEG-HSI spectrum show identical line shape that is well modeled by two broad, E/dE = ~120, lines: one at 0.5249 keV and one at 0.991*0.5249 keV with relative intensity 1.0:0.3 . By "O-K" line we mean this whole/combined line profile.

• OK,CrLx2 LEG HSI image and spectrum from D-LXH-3D-11.042, 970118/hsi109293i0.fits.
• OK,CrLx2 HEG HSI image and spectrum fromD D-HXH-3D-11.044, 970119/hsi109295i0.fits. The O-K line here is no broader than as observed with the LEG, indicating that this is the intrinsic line shape.
• Two-gaussian approximation to the O-K line shape (LEG data).

Ti Anode

The Ti anode, run at high voltage, produces Ti K-alpha, Ti-K beta, Ti-L lines continuum and contaminating C and O lines. Used with a TiKx2 filter the continuum may be hard to separate from the K-a K-b lines in FPC spectra.

• HEG-HSI +1st order Ti-K lines image and spectrum, from E-HXH-3D-10.007, 970203, hsi111121i0.fits. Centered in the image is the 1st order Ti K-alpha line, K-beta is to left. Measured K-b/K-a ratio here is 0.171 +/- 0.005; the HRMA-HEG-HSI response at 4.9 relative to 4.5 keV is ~ 0.944 so the source K-b/K-a ratio is ~0.181. THe BND-FPC relative response K-b/K-a ~0.935 so BND-FPC ratio is ~0.169.
• Modeled Ti w/TiKx2 spectrum and what it looks like to a BND-FPC.

Source Stability