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J/AJ/131/3016       Low-mass objects in Upper Scorpius         (Slesnick+, 2006)

A large-area search for low-mass objects in Upper Scorpius. I. The photometric campaign and new brown dwarfs. Slesnick C.L., Carpenter J.M., Hillenbrand L.A. <Astron. J., 131, 3016-3027 (2006)> =2006AJ....131.3016S
ADC_Keywords: Clusters, open ; Stars, pre-main sequence ; Photometry ; Equivalent widths Keywords: open clusters and associations: individual (Upper Scorpius) - stars: low-mass, brown dwarfs - stars: pre-main sequence Abstract: We present a wide-field photometric survey covering ∼200°2 toward the Upper Scorpius OB association. Data taken in the R and I bands with the Quest-2 camera on the Palomar 48inch (1.2m) telescope were combined with the Two Micron All Sky Survey JHKS survey and used to select candidate pre-main-sequence stars. Follow-up spectroscopy with the Palomar 200inch (5.1m) telescope of 62 candidate late-type members identified 43 stars that have surface gravity signatures consistent with association membership. Description: Photometric observations were taken with the Quest-2 camera on the 48inch (1.2m) Samuel Oschin Schmidt Telescope at Palomar Observatory. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 82 65 Measured quantities for PMS candidates with observed spectra table2.dat 42 43 Derived quantities for new USco members
See also: II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003) J/AJ/120/479 : Low-mass stars in the Upper Sco association (Ardila+, 2000) J/A+A/333/619 : Upper Scorpius OB association Lithium survey (Preibisch+ 1998) J/AJ/121/1040 : PMS members of upper Scorpius OB association (Preibisch+ 2001) J/AJ/124/404 : Upper Scorpius OB association Lithium survey. II. (Preibisch, 2002) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 3 A3 --- --- [SCH] 5- 21 A17 --- [SCH2006] Object identification, HHMMSSss+DDMMSSss ([SCH2006] JHHMMSSss+DDMMSSss in Simbad) 23- 26 F4.1 mag Rmag Johnson R magnitude 28- 31 F4.1 mag Imag Johnson I magnitude 33- 37 F5.2 mag Jmag 2MASS J magnitude 39- 43 F5.2 mag Hmag 2MASS H magnitude 45- 49 F5.2 mag Ksmag 2MASS Ks magnitude 51- 54 F4.2 --- TiO.7 Strength of TiO λ7140 absorption compared to a continuum band at 7035Å 56- 59 F4.2 --- TiO.8 Strength of TiO λ8465 absorption compared to a continuum band at 8415Å 61- 64 F4.2 --- Na.8 Strength of the NaI doublet at 8189Å compared to a continuum band at 8150Å 65 A1 --- l_SpT [<] Upper limit flag on SpT 66- 69 A4 --- SpT MK spectral type 71- 76 F6.2 0.1nm EWHa ? Hα equivalent width 78- 82 A5 --- gType Surface gravity signature type (1)
Note (1): The surface gravity type is defined as follows: Dwarf = surface gravity signatures consistent with those measured for field dwarfs USco = surface gravity signatures consistent with those measured for known USco members Int = surface gravity signatures intermediate betweeb Swarf and USco
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 3 A3 --- --- [SCH] 5- 21 A17 --- [SCH2006] Object identification, HHMMSSss+DDMMSSss ([SCH2006] JHHMMSSss+DDMMSSss in Simbad) 23- 26 F4.2 --- JMAG Absolute J magnitude 28- 31 F4.2 --- AV V-band extinction 33- 36 F4.2 [K] log(Te) Log of the effective temperature 38- 42 F5.2 [solLum] log(L) Log of luminosity
History: From electronic version of the journal
(End) Marianne Brouty [CDS] 18-Jul-2008
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

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