J/A+A/353/1044 ROSAT obs. of T Tauri stars in MBM 12 (Hearty+, 2000)
ROSAT PSPC observations of T Tauri stars in MBM 12
Hearty T., Neuhaeuser R., Stelzer B., Fernandez M., Alcala J.M.,
Covino E., Hambaryan V.
<Astron. Astrophys. 353, 1044 (2000)>
=2000A&A...353.1044H 2000A&A...353.1044H
ADC_Keywords: Stars, pre-main sequence ; X-ray sources ; Equivalent widths
Mission_Name: ROSAT
Keywords: stars: formation - ISM: clouds
Description:
We present the ROSAT PSPC pointed and ROSAT All-Sky Survey (RASS, Cat.
IX/10) observations and the results of our low and high spectral
resolution optical follow-up observations of the T Tauri stars (TTS)
and X-ray selected T Tauri star candidates in the region of the high
galactic latitude dark cloud MBM 12 (L1453-L1454, L1457, L1458). Table
4 lists all of the X-ray detected sources in the direction of the
molecular cloud MBM12 along with relevant X-ray and optical data.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 145 80 ROSAT detected X-ray sources in the direction
table4.tex 177 136 LaTeX version
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See also:
IX/10 : ROSAT All-Sky Bright Source Catalogue (1RXS) (Voges+ 1999)
IX/11 : ROSAT PSPC Source Catalog (Voges+ 1994)
Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Seq Sequential number of the X-ray source (1)
3 A1 --- m_Seq Multiplicity index when several possible
optical counterparts
5- 8 A4 --- Survey "RASS" (ROSAT All Sky Survey) or
"RPOS" (Pointed Observation sources)
10- 23 A14 --- Name Name (2)
27- 28 I2 h RAh X-ray right ascension (J2000)
30- 31 I2 min RAm X-ray right ascension (J2000)
33- 36 F4.1 s RAs X-ray right ascension (J2000)
39 A1 --- DE- X-ray declination sign (J2000)
40- 41 I2 deg DEd X-ray declination (J2000)
43- 44 I2 arcmin DEm X-ray declination (J2000)
46- 47 I2 arcsec DEs X-ray declination (J2000)
49- 54 F6.1 --- ML Maximum Likelihood for Existence
56- 61 F6.4 --- e_ML rms uncertainty on ML
63- 68 F6.4 ct/s CountRate X-ray count rate in the 0.1-2.0 keV band
70- 74 F5.2 --- HR1 X-ray hardness ratio 1
76- 79 F4.2 --- e_HR1 rms uncertainty on HR1
81- 85 F5.2 --- HR2 ? X-ray hardness ratio 2
87- 90 F4.2 --- e_HR2 ? rms uncertainty on HR2
93- 96 F4.1 mag Vmag ? Optical counterpart visual magnitude
97 A1 --- n_Vmag [:] Note on Vmag (3)
100-104 F5.2 --- log(fx/fv) ? X-ray to optical flux ratio
106-110 A5 --- SpT Optical counterpart spectral type
113-118 F6.2 0.1nm W(Ha) ? Hα equivalent width
119 A1 --- n_W(Ha) [f] f: filled
120-123 F4.2 0.1nm W(Li) ? Lithium equivalent width
125-144 A20 --- Comments Comments on individual sources
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Note (1): There are 49 X-ray sources in the ROSAT pointed observation and
28 X-ray sources in the RASS.
Note (2): Name of the possible optical counterpart or ROSAT source name.
S18 object is labelled EM* StHA 18 in Simbad, from Stephenson's
list (1986ApJ...300..779S 1986ApJ...300..779S)
Note (3): Those magnitudes marked with a ":" are estimated from the digital
sky survey.
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Acknowledgements: Thomas J. Hearty
(End) Patricia Bauer [CDS] 27-Jan-2000