J/A+A/399/995 SOFI and ISOCAM observations of Cha II (Persi+, 2003)
Near-infrared and ISOCAM observations of Chamaeleon dark cloud.
Persi P., Marenzi A.R., Gomez M., Olofsson G.
<Astron. Astrophys. 399, 995 (2003)>
=2003A&A...399..995P 2003A&A...399..995P
ADC_Keywords: Molecular clouds ; Photometry, infrared
Keywords: stars: formation - stars: low-mass, brown dwarfs -
stars: pre-main sequence - infrared: stars
Abstract:
An infrared study including ISOCAM images at 6.75 and 14.3µm of a
large portion (28'x26') of the Chamaeleon II dark cloud and sub-arcsec
resolution JHKs images of the central (4.9'x4.9') area is presented.
Combining the ISOCAM observations with J and Ks photometry obtained
with DENIS, we have found 12 young stars, of which 8 are previously
identified sources.
Description:
A region of approximately 28'x26' of Cha II, centered at
RA = 13h 00min 47s, DE = -77° 06' 09" (2000), was surveyed with
ISOCAM in raster mode at LW2(5-8.5µm) (TDT N.11500619) and
LW3(12-18µm)(TDT N.11500620). All the frames were observed with a
pixel field of view (PFOV) of 6", intrinsic integration time
Tint=2.1s and ∼15s integration time per sky position. The total
integration time was of 4472 s and 4474 s for LW2 and LW3,
respectively.
We obtained J, H, and Ks images of the central part of Cha II covering
an area of4.9'x4.9' with the SOFI near-IR camera at the ESO 3.58m New
Technology Telescope (NTT) on the night of April 28, 2000 under very
good seeing conditions (∼0.3") SOFI uses a 1024x1024 pixel HgCdTe
array and provides a field of view of 299"x299" with a scale of
0.292"/pix.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 64 115 Coordinates and flux densities of the ISOCAM
sources in Cha II
table2.dat 69 197 Coordinates and near-IR photometry of the SOFI
sources in the central part of Cha II
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See also:
J/A+A/350/883 : R CrA ISOCAM observations (Olofsson+, 1999)
J/A+A/357/219 : ISOCAM observations in Cha I. (Persi+, 2000)
J/A+A/372/173 : ISOCAM observations of the rho Ophiuchi cloud (Bontemps+, 2001)
J/A+A/376/907 : Near-IR Sources in the Cederblad 110 region (Persi+ 2001)
J/A+A/319/184 : New WTTS in the Chamaeleon complex (Alcala+ 1997)
J/A+A/341/L79 : Proper motions of faint ROSAT WTT stars (Terranegra+ 1999)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- SeqISO Sequential number of ISOCAM source
6- 7 I2 h RAh Right Ascension J2000 (hours)
9- 10 I2 min RAm Right Ascension J2000 (minutes)
12- 15 F4.1 s RAs Righ Ascension J2000 (seconds)
17 A1 --- DE- Declination J2000 (sign)
18- 19 I2 deg DEd Declination J2000 (degrees)
21- 22 I2 arcmin DEm Declination J2000 (minutes)
24- 25 I2 arcsec DEs Declination J2000 (seconds)
27- 32 F6.2 mJy F(LW2) ? Flux in mJy at 6.75µm
34- 38 F5.2 mJy e_F(LW2) ? Statistical flux error at 6.75µm
40- 46 F7.2 mJy F(LW3) ? Flux in mJy at 14.3µm
48- 52 F5.2 mJy e_F(LW3) ? Statistical flux error at 14.3µm
54- 64 A11 -- Name Identification
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 3 I3 ---- SeqSOFI Sequential number of SOFI source
5- 6 I2 h RAh Right Ascension J2000 (hours)
8- 9 I2 min RAm Right Ascension J2000 (minutes)
11- 15 F5.2 s RAs Righ Ascension J2000 (seconds)
17 A1 --- DE- Declination J2000 (sign)
18- 19 I2 deg DEd Declination J2000 (degrees)
21- 22 I2 arcmin DEm Declination J2000 (minutes)
24- 27 F4.1 arcsec DEs Declination J2000 (seconds)
30- 34 F5.2 mag Jmag ? J magnitude
38- 41 F4.2 mag e_Jmag ? Statistical error in Jmag
44- 48 F5.2 mag Hmag ? H magnitude
52- 55 F4.2 mag e_Hmag ? Statistical error in Hmag
58- 62 F5.2 mag Ksmag Ks magnitude
66- 69 F4.2 mag e_Ksmag Statistical error in Ksmag
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Acknowledgements: Paolo Persi
(End) Patricia Bauer [CDS] 24-Jan-2003