J/A+A/326/211 T Tau Stars (Wichmann+, 1997)
T Tauri stars and the Gould Belt near Lupus.
Wichmann R., Sterzik M., Krautter J., Metanomski A., Voges W.
<Astron. Astrophys., 326, 211-217 (1997)>
=1997A&A...326..211W 1997A&A...326..211W
ADC_Keywords: Stars, pre-main sequence ; X-ray sources ; Equivalent widths
Keywords: stars: formation - stars: late-type - stars: pre-main sequence -
X-rays: stars
Abstract:
We present results of a study to investigate the spatial distribution
of X-ray active young stellar objects near the Lupus star forming
region (SFR). In this SFR, a recent study has led to the discovery of
some 130 new weak-line T Tauri stars (WTTS) dispersed over a large
area of some 230 square degrees. However, the true extent of the
spatial distribution of these stars could not be determined in this
study.
Description:
The 2MASS, 2UCAC, and Tycho2 counterparts were added to original table.
Data for RXJ1455.8-3944 were corrected (as confirmed by R. Wichmann via
personal communication).
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 117 48 WTTS identified with RASS X-ray sources within
the region surveyed in this work.
--------------------------------------------------------------------------------
See also:
IX/10 : ROSAT All-Sky Bright Source Catalogue (1RXS) (Voges+ 1996)
IX/11 : ROSAT Source Catalog (Voges+ 1994)
I/289 : UCAC2 Catalogue (Zacharias+ 2004)
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
I/259 : The Tycho-2 Catalogue (Hog+ 2000)
J/A+AS/123/329 : New weak-line T Tauri stars in Lupus (Krautter+ 1997)
J/A+A/320/185 : T Tauri UBVRIcJHKL photometry (Wichmann+ 1997)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 --- Seq Sequential number
4- 5 A2 --- --- [RX]
6- 17 A12 --- RX RX designation (JHHMMSS.s-DDMMA)
18 A1 --- m_RX [AB] Multiplicity index on RX
19 A1 --- n_RX [K*] Note on RX (1)
21- 22 I2 h RAh Right ascension (J2000)
24- 25 I2 min RAm Right ascension (J2000)
27- 30 F4.1 s RAs Right ascension (J2000)
32 A1 --- DE- Declination sign (J2000)
33- 34 I2 deg DEd Declination (J2000)
36- 37 I2 arcmin DEm Declination (J2000)
39- 40 I2 arcsec DEs Declination (J2000)
42- 46 A5 --- SpType MK spectral type
48- 52 F5.2 km/s Vmag ?=* GCS V magnitude
54- 56 I3 pm EWLi Li (6708Å) equivalent width
58- 62 F5.3 s-1 CR RASS X-ray count rate
64- 67 F4.2 --- HR1 RASS harness ratio 1, HR1 (2)
69- 73 F5.2 --- HR2 RASS harness ratio 2, HR2 (2)
75- 78 F4.2 10-15W/m2 FX X-ray flux
80- 96 A17 ---- 2MASS 2MASS (II/246) designation (JHHMMSSss-DDMMSSs)
98-105 I8 --- UCAC2 ?=* UCAC2 (I/289 number
107-117 A11 ---- TYC2 Tycho2 (I/259) number (NNNN-NNNN-N)
--------------------------------------------------------------------------------
Note (1): Notes as follows:
K = For those WTTS that are common with Krautter et al.
(1997, Cat. J/A+AS/123/329)
* = position published in Wichmann et al. (1997A&A...326..211W 1997A&A...326..211W) for
RXJ1455.8-3944 is "14 55 51.4 -39 43 46" and magnitude is
"14.57". E. Mamajek found that this is most likely not the
correct optical counterpart. R. Wichmann (personal comm.)
agrees that the spectral information corresponds to the bright
star HD 131607 (= TYC 7824-2717-1). The listed optical position
is from Tycho-2, and the Vmag is from the GSC.
Note (2): Hardness ratios are defined as:
HR1 = (B-A)/(B+A) and HR2 = (D-C)/(D+C) where
A is the PHA 11-41 channel counts,
B is the PHA 52-201 channel counts,
C is the PHA 52-90 channel counts and
D is the PHA 91-201 channel counts.
--------------------------------------------------------------------------------
Acknowledgements: Eric Mamajek, emamajek(at)cfa.harvard.edu
(End) Patricia Vannier [CDS] 13-Sep-2005