J/A+A/470/281 WFI optical photometry in Cha II dark cloud (Spezzi+, 2007)
A WFI survey in the Chamaeleon II dark cloud.
Spezzi L., Alcala J.M., Frasca A., Covino E., Gandolfi D.
<Astron. Astrophys. 470, 281 (2007)>
=2007A&A...470..281S 2007A&A...470..281S
ADC_Keywords: Molecular clouds ; Stars, pre-main sequence ; Photometry
Keywords: stars: low-mass, brown dwarfs - stars: formation -
stars: pre-main sequence - ISM: clouds -
ISM: individual objects: Chamaeleon II
Abstract:
We present the results of an optical multi-band survey for low-mass
pre-main sequence (PMS) stars and young brown dwarfs (BDs) in the
Chamaeleon II (Cha II) dark cloud. This survey constitutes the
complementary optical data to the c2d Spitzer Legacy survey in Cha II.
Description:
Table 7 reports the optical photometry of 73 objects in the Chamaeleon
II (Cha II) dark cloud.
These data are part of an optical multi-band survey for low-mass
pre-main sequence stars and young brown dwarfs in Cha II, performed
using the wide-field imager (WFI) at the ESO 2.2m telescope.
As clarified in the last column, the table contains the confirmed
members of Cha II, the candidates selected by previous surveys, and
the new candidates selected in this work, as well as other sources
identified as possible candidates in previous studies but that were
rejected by our selection criteria.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table7.dat 149 74 Optical photometry of objects in the ChaII dark cloud
refs.dat 81 13 References
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See also:
J/A+A/319/184 : New WTTS in the Chamaeleon complex (Alcala+ 1997)
J/A+A/399/995 : SOFI and ISOCAM observations of Cha II (Persi+, 2003)
Byte-by-byte Description of file: table7.dat
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Bytes Format Units Label Explanations
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1- 21 A21 --- Name Object name
23- 24 I2 h RAh Right ascension (J2000) (1)
26- 27 I2 min RAm Right ascension (J2000) (1)
29- 33 F5.2 s RAs Right ascension (J2000) (1)
35 A1 --- DE- Declination sign (J2000) (1)
36- 37 I2 deg DEd Declination (J2000) (1)
39- 40 I2 arcmin DEm Declination (J2000) (1)
42- 46 F5.2 arcsec DEs Declination (J2000) (1)
48- 52 F5.2 mag Rcmag ? Cousins R magnitude
54- 57 F4.2 mag e_Rcmag ? rms uncertainty on Rcmag
58 A1 --- n_Rcmag [*] * when magnitude from literature (2)
59- 60 A2 --- f_Rcmag [S ] Flag when no value (3)
62- 66 F5.2 mag Icmag ? Cousins I magnitude
68- 71 F4.2 mag e_Icmag ? rms uncertainty on Icmag
72 A1 --- n_Icmag [*] * when magnitude from literature (2)
73- 74 A2 --- f_Icmag [S ] Flag when no value (3)
76- 80 F5.2 mag zmag ? z magnitude in the WFI z+/61 filter
(central wavelength at 964.819nm)
82- 85 F4.2 mag e_zmag ? rms uncertainty on zmag
86- 87 A2 --- f_zmag [S ND] Flag when no value (3)
89- 93 F5.2 mag Ha7mag ? Halpha7 magnitude in the WFI Halpha/7 filter
(central wavelength at 658.827nm)
95- 98 F4.2 mag e_Ha7mag ? rms uncertainty on Ha7mag
99-100 A2 --- f_Ha7mag [ND NO] Flag when no value (3)
102-106 F5.2 mag Ha12mag ? Halpha12 magnitude in the WFI 665/12 filter
(central wavelength at 665nm)
108-111 F4.2 mag e_Ha12mag ? rms uncertainty on Ha12mag
112-113 A2 --- f_Ha12mag [ND NO] Flag when no value (3)
115-119 F5.2 mag m856mag ? m856 magnitude in the WFI 856/12 filter
(central wavelength at 856nm)
121-124 F4.2 mag e_m856mag ? rms uncertainty on m856mag
125-126 A2 --- f_m856mag [S NO] Flag when no value (3)
128-132 F5.2 mag m914mag ? m914 magnitude in the WFI 914/12 filter
(central wavelength at 914nm)
134-137 F4.2 mag e_m914mag ? rms uncertainty on m914mag
138-139 A2 --- n_m914mag [S NO] Flag when no value (3)
141-143 A3 --- Refs [a-m ,] Reference for the object, in refs.dat
145-149 A5 --- Notes Note for the object (4)
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Note (1): The positions for most objects are from the R-band images.
For saturated objects in the R-band the positions are from the
Hα12 images; the coordinates of Sz 62, not observed in
Hα, are from the z-band image.
Note (2): Magnitudes marked with an asterisk are taken from the the
literature (see the relative references) and correspond to
objects saturated in our images. Comments about some of
these objects are given in Appendix C.
Note (3): Flag as follows:
S = Saturated object
ND = Object not detected
NO = Object not observed
Note (4): Notes as follows:
* = Confirmed member
o = Previously known candidate
a = Object recovered by our selection criteria
N = Member candidate firstly identified in this work
b = Object rejected on the basis of our selection criteria
c = Veiled object
d = Embedded object
e = Component of a visual binary or multiple system
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1 A1 --- Ref Reference code
3- 21 A19 --- BibCode BibCode
23- 56 A34 --- Aut Author's name
61- 81 A21 --- Com Comments
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Acknowledgements:
Loredana Spezzi, lspezzi(at)oact.inaf.it
(End) Loredana Spezzi [INAF-OA Capodimonte], Patricia Vannier [CDS] 07-Jun-2007