CDROM/AJ/V111/P0936 Binary Stars. XIII (Hartkopf+ 1996) ================================================================================ ICCD Speckle Observations of Binary Stars. XIII. Measurements During 1989-1994 From the Cerro Tololo 4 m Telescope William I. Hartkopf, Brian D. Mason, Harold A. McAlister, Nils H. Turner, Donald J. Barry, Otto G. Franz, and Cristina M. Prieto <1996, AJ, 111, 936> =1996AJ....111..936H ================================================================================ Abstract: Nine hundred eighty-nine observations of 694 binary star systems, observed by means of speckle interferometry with the 4 m 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. File Summary: -------------------------------------------------------------------------------- File Name Lrecl Records Explanations -------------------------------------------------------------------------------- table1.dat 83 7 New interferometric components table2.dat 72 987 Binary star speckle measurements -------------------------------------------------------------------------------- Byte-by-byte Description of file: table1.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1-10 A10 --- EQ Epoch 2000 RA & Dec in manner of WDS 11-12 2X --- --- Blank 13-24 A12 --- DM Durchmusterung (BD, CD, or CP) number 25-31 A7 --- HD Henry Draper number 32-33 2X --- --- Blank 34-39 A6 --- CHARA Binary star discoverer (CHARA) designation 40-44 F5.1 mag V Combined V magnitude 45-49 F5.1 mag dV V magnitude difference 50-51 2X --- --- Blank 52-61 A10 --- Sp Spectral type 62-70 D9.4 BY Epoch Discovery date, as fractional Besselian yr 71-77 F7.3 arcsec Sep Binary star separation, at discovery 78-83 I6 yr Period *Estimated orbital period -------------------------------------------------------------------------------- Notes for file: table1.dat -------------------------------------------------------------------------------- Period: Estimated orbital period, assuming circular, face-on orbits with both components of equal brightness and mass -------------------------------------------------------------------------------- Byte-by-byte Description of file: table2.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1-10 A10 --- WDS *WDS number, equinox 2000.0 11-12 2X --- --- Blank 13-24 A12 --- Disc Discoverer designation 25-26 2X --- --- Blank 27-34 A8 --- HDDM *Henry Draper or Durchmusterung number 35-44 F10.4 BY Date Observation date (-1900) 45-52 F8.1 deg Theta *Position angle 53 A1 --- u_Theta Uncertainty flag for Theta 54-61 F8.3 arcsec Rho *Angular separation 62 A1 --- u_Rho Uncertainty flag for Rho 63-64 2X --- --- Blank 65-72 A8 nm Lambda Filter effective wavelength and FWHM -------------------------------------------------------------------------------- Notes for file: table1.dat -------------------------------------------------------------------------------- WDS: 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). If this field is blank, the data in fields Date, Theta, Rho, and Lambda are continuations of the previous record. HDDM: DM designations are BD numbers for declinations north of -21 deg, CPD numbers for stars further south. Theta, Rho: 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. -------------------------------------------------------------------------------- ================================================================================ (End) Lee Brotzman [ADS] 10-Mar-1996