Access to Astronomical Catalogues

← Click to display the menu
J/ApJS/150/455      New HIP-based parallaxes for 424 faint stars  (Gould+, 2004)

New HIPPARCOS-based parallaxes for 424 faint stars. Gould A., Chaname J. <Astrophys. J. Suppl. Ser., 150, 455-464 (2004)> =2004ApJS..150..455G
ADC_Keywords: Stars, faint ; Parallaxes, trigonometric ; Proper motions ; Magnitudes, absolute Keywords: astrometry - catalogs - stars: fundamental parameters - stars: late-type - white dwarfs Abstract: We present a catalog of 424 common proper-motion companions to Hipparcos stars with good (>3σ) parallaxes, thereby effectively providing new parallaxes for these companions. Compared with typical stars in the Hipparcos catalog, these stars are substantially dimmer. The catalog includes 20 white dwarfs and an additional 29 stars with MV>14, the great majority of the latter being M dwarfs. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 157 424 New parallaxes for Hipparcos Companions table2.dat 85 84 Hipparcos doubles table3.dat 105 20 White Dwarf Companions to Hipparcos Stars table4.dat 105 29 MV>14 Companions to Hipparcos Stars
See also: I/239 : The Hipparcos and Tycho Catalogues (ESA 1997) I/98 : NLTT Catalogue (Luyten, 1979) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 5 I5 --- NLTT Companion NLTT (I/98) number 7- 15 F9.5 deg RAdeg Companion right Ascension in decimal degrees (J2000, Ep=J2000) (G1) 17- 25 F9.5 deg DEdeg Companion declination in decimal degrees (J2000, Ep=J2000) (G1) 27- 31 I5 mas/yr pmRA Companion east proper-motion component 33- 37 I5 mas/yr pmDE Companion north proper-motion component 39- 43 F5.2 mag Vmag Companion V band magnitude 45- 49 F5.2 mag (V-J) ?=-9.00 Companion (V-J) color index 51- 55 F5.2 mag VMAG Companion absolute V band magnitude 57- 59 I3 --- Code Companion source code (2) 61- 65 I5 --- NLTT1 Primary NLTT (I/98) number 67- 75 F9.5 deg RA1deg Primary Right Ascension in decimal degrees (2000) (G1) 77- 85 F9.5 deg DE1deg Primary Declination in decimal degrees (J2000) (G1) 87- 91 I5 mas/yr pmRA1 Primary East proper-motion component 93- 97 I5 mas/yr pmDE1 Primary North proper-motion component 99-103 F5.2 mag Vmag1 Primary V band magnitude 105-109 F5.2 mag (V-J)1 ?=-9.00 Primary (V-J) color index 111-115 F5.2 mag VMAG1 Primary absolute V band magnitude 117-119 I3 --- Code1 Primary source code (2) 121-125 F5.1 arcsec Sep Separation of the companion with respect to the primary 127-131 F5.1 deg PA Position angle of the companion with respect to the primary, north through east 133-138 I6 --- HIP1 Primary Hipparcos (I/239) number 140-145 F6.2 mas plx1 Primary Hipparcos parallax 147-151 F5.2 mas e_plx1 Error in plx 153-155 I3 --- Dpm Adopted proper-motion difference 157 I1 --- Bin [0/1] Binarity flag (3)
Note (2): The three-digit source code is an expanded version of the source code used in rNLTT, Cat. J/ApJ/582/1011. There, the three digits refer to the sources of the position, proper motion, and V photometry. 1 = Hipparcos, Cat. I/239 2 = Tycho-2, Cat. I/259 3 = TDSC, Cat. I/276 4 = Starnet, Cat. I/253 5 = USNO/2MASS, Cat. II/246 6 = NLTT, Cat. I/98 7 = USNO-A, Cat. I/252, (for position) or common proper motion companion (for proper motion). 8 = USNO-B, Cat. I/284 (position and proper motion) 9 = no actual detection in any catalog (position is inferred from the separation vector given in the NLTT Notes) More specifically, "555" means 2MASS based position, USNO-A based V photometry, and USNO/2MASS based proper motion. The "8" and "9" notes are an addition to the rNLTT codes. USNO-A photometry and NLTT photometry are transformed to V photometry using the prescriptions of Salim & Gould (2003, Cat. J/ApJ/582/1011). Note (3): Binary flag: 0 = binary certain 1 = binary "somewhat uncertain"-------------------------------------------------------------------------------- Byte-by-byte Description of file: table2.dat
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 6 I6 --- HIP1 Brighter component Hipparcos (I/239) number 8- 12 I5 --- NLTT1 Brighter component rNLTT (J/ApJ/582/1011) number 14- 19 F6.2 mas plx1 Brighter component parallax 21- 25 F5.2 mas e_plx1 Error in plx1 27- 31 F5.2 mag Vmag1 Brighter component V band magnitude 33- 36 F4.2 mag (V-J)1 Brighter component (V-J) color 38- 43 I6 --- HIP2 Fainter component Hipparcos number 45- 49 I5 --- NLTT2 Fainter component rNLTT number 51- 56 F6.2 mas plx2 Fainter component parallax 58- 62 F5.2 mas e_plx2 Error in plx2 64- 68 F5.2 mag Vmag2 Fainter component V band magnitude 70- 73 F4.2 mag (V-J)2 Fainter component (V-J) color 75- 79 F5.1 arcsec Sep Separation between fainter and brighter components 81- 85 F5.1 deg PA Position angle between fainter and brighter components
Byte-by-byte Description of file: table3.dat table4.dat
Bytes Format Units Label Explanations
1- 5 I5 --- NLTT Companion NLTT (I/98) number 7- 15 F9.5 deg RAdeg Right Ascension in decimal degrees (J2000) (G1) 17- 25 F9.5 deg DEdeg Declination in decimal degrees (J2000) (G1) 27- 31 F5.2 mag Vmag V band magnitude 33- 37 F5.2 mag V-J ?=-9.00 (V-J) color index 39- 43 F5.2 mag VMAG Absolute V band magnitude 45- 49 F5.1 arcsec Sep Separation relative to the primary star 51- 55 F5.1 deg PA Position angle relative to the primary star, north through east 57- 62 I6 --- HIP1 Primary Hipparcos (I/239) number 64- 69 F6.2 mas plx1 Hipparcos parallax of the primary 71- 74 F4.2 mas e_plx1 Error in plx 76- 81 F6.2 mas plxOld ? Previously tabulated parallax of the companion 83- 87 F5.2 mas e_plxOld ? Error in plxOld 89- 98 A10 --- Name Name of the companion 100-105 A6 --- SpType Spectral type of the companion
Global notes: Note (G1): 2000 epoch and equinox.
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 13-Feb-2004
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

catalogue service

© UDS/CNRS

Contact