Access to Astronomical Catalogues

Search catalogue
in preparation
catalog without ftp or VizieR link
J/AJ/107/2120       JHK photometry of the OMC2 region (Jones+ 1994)

A near infrared survey of the OMC2 region Jones T.J., Mergen J., Odewahn S., Gehrz R.D., Gatley I., Merrill K.M., Probst R., Woodward C.E. <Astron. J. 107, 2120 (1994)> =1994AJ....107.2120J (SIMBAD/NED BibCode)
ADC_Keywords: Photometry, infrared Abstract: We present an unbiased survey at 1.25-2.2um of a 0.025sq.deg. region surrounding the core of Orion Molecular Cloud 2 (OMC-2). Analysis of the source counts and colors indicates that the majority of the sources brighter than K=+13 are not field stars. They must be members of a young association or associations within the survey area. The K band luminosity function (corrected for field star contamination using model calculations) exhibits a drop in counts at magnitudes fainter than K=+13 (∼0.15L). This is most easily explained by assuming that the association(s) are young. The lowest mass stars simply have not yet reached the main sequence. The distribution of colors across the region shows moderate correlation with molecular gas, but both reddened and unreddened stars are present along most lines of sight. Considerable reflection nebulosity is present in the region of the core cluster of OMC2 itself. Of particular interest are the thin streamers emanating from the star J9, which may be the remnant of a bipolar nebula produced by the star in the recent past. Objects: ---------------------------------------------------------- RA (2000) DE Designation(s) ---------------------------------------------------------- 05 35 27 -05 10.1 OMC 2 = GAL 208-19.2 ---------------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1 55 219 Source list
Byte-by-byte Description of file: table1
Bytes Format Units Label Explanations
1- 3 I3 --- ID Identitication number 5 I1 h RAh Right ascension (1950) 7- 8 I2 min RAm Right ascension (1950) 10- 13 F4.1 s RAs Right ascension (1950) 15 A1 --- DE- Declination sign 16 I1 deg DEd Declination (1950) 18- 19 I2 arcmin DEm Declination (1950) 21- 22 I2 arcsec DEs Declination (1950) 24- 28 F5.2 mag Jmag ? J magnitude (1.20 µm) 30- 33 F4.2 mag e_Jmag ? rms uncertainty on Jmag 35- 39 F5.2 mag Hmag ? H magnitude (1.62 µm) 41- 44 F4.2 mag e_Hmag ? rms uncertainty on Hmag 46- 50 F5.2 mag Kmag ? K magnitude (2.20 µm) 52- 55 F4.2 mag e_Kmag ? rms uncertainty on Kmag
History: Prepared via OCR at CDS.
(End) James Marcout, Patricia Bauer [CDS] 07-Mar-1997
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

catalogue service