J/AJ/111/936 J/AJ/111/936 ICCD Speckle obs. of binary stars. XIII W I Hartkopf B D Mason H A McAlister N H Turner D J Barry O G Franz C M Prieto Astron. J. 111 936 1996 1996AJ....111..936H I/107 : Washington Double Star Catalog (WDS) (Worley+ 1984) J/AJ/106/352 : ICCD speckle obs. of binary stars. VIII (Hartkopf+ 1993) J/AJ/106/637 : ICCD speckle obs. of binary stars. IX (Mason+, 1993) J/AJ/106/1639 : ICCD speckle obs. of binary stars. X (McAlister+ 1993) J/AJ/108/2299 : ICCD speckle obs. of binary stars. XI (Hartkopf+ 1994) J/AJ/111/393 : ICCD speckle obs. of binary stars. XII (Al-Shukri+ 1996) ftp://ftp.chara.gsu.edu/ : results from CHARA project Interferometry Stars, double and multiple Nine hundred eighty-nine observations of 694 binary star systems, observed by means of speckle interferometry with the 4m telescope on Cerro Tololo, are presented. Included in these observations are three new interferometric binaries and new interferometric companions to four visual binaries. These measurements, made during the period 1989-1994, comprise the 13th installment of digital results stemming from our speckle program at several major observatories, and the 23rd list since the program's inception in 1975.

NameJ Epoch 2000 RA & Dec in manner of WDS --- DM Durchmusterung (BD, CD, or CP) number --- HD Henry Draper number --- CHARA Binary star discoverer (CHARA) designation --- Vmag Combined V magnitude mag dVmag V magnitude difference mag Sp Spectral type --- Epoch Discovery date, as fractional Besselian yr yr Sep Binary star separation, at discovery arcsec Period Estimated orbital period Estimated orbital period, assuming circular, face-on orbits with both components of equal brightness and mass yr WDS WDS number <I/107>, equinox 2000.0 The coordinates, which serve as the Washington Double Star Catalog (WDS) number, are for equinox 2000.0, but position angles have not been corrected for precession and are thus based upon the equinox for the epoch of observation (field Date). --- Disc Discoverer designation --- HD/DM Henry Draper or Durchmusterung number DM designations are BD numbers for declinations north of -21 deg, CPD numbers for stars further south. --- Date Observation date (-1900) yr Theta Position angle Accuracies are a function of stellar magnitude, magnitude difference, separation, and observing conditions; typical values for these observations are 1-3 mas in Rho and 0.1-0.2 deg in Theta. Colons following Theta or Rho values indicate measurements of somewhat reduced accuracy, usually the result of observing fainter systems or systems of larger magnitude difference. deg u_Theta Uncertainty flag for Theta --- Rho Angular separation arcsec u_Rho Uncertainty flag for Rho --- Lambda Filter effective wavelength and FWHM nm CDS 1996Sep05AAS CD-ROM series, Volume 6, 1996 Lee Brotzman [ADS] 10-Mar-1996 J_AJ_111_936.xml