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J/AJ/121/861        BVI photometry of central part of M33   (Macri+, 2001)

The DIRECT project: catalogs of stellar objects in nearby galaxies. I. The central part of M33. Macri L.M., Stanek K.Z., Sasselov D.D., Krockenberger M., Kaluzny J. <Astron. J. 121, 861 (2001)> =2001AJ....121..861M
ADC_Keywords: Galaxies, nearby ; Photometry, UBVRI Keywords: galaxies: individual (M33) - galaxies: stellar content Abstract: The DIRECT project aims to determine direct distances to two important galaxies in the cosmological distance ladder - M31 and M33 - using detached eclipsing binaries (DEBs) and Cepheids. The search for these variables requires time-series photometry of large areas of the target galaxies and yields magnitudes and positions for tens of thousands of stellar objects, which may be of use to the astronomical community at large. During the first phase of the project, between 1996 September and 1997 October, we were awarded 95 nights on the F. L. Whipple Observatory 1.2 m telescope and 36 nights on the Michigan-Dartmouth-MIT 1.3 m telescope to search for DEBs and Cepheids in the M31 and M33 galaxies. This paper, the first in our series of stellar catalogs, lists the positions, three-color photometry, and variability indices of 57,581 stars with 14.4<V<23.6 in the central part of M33. The catalog is available from our FTP site. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 40 515 Log of Observations table3.dat 85 57581 Catalog of stars in the central part of M33
See also: : DIRECT Project homepage J/AJ/121/870 : Variables in the central part of M33 BVI phot. (Macri+, 2001) J/AJ/121/2032 : Direct variables in M33A field (Mochejska+, 2001) J/A+A/366/498 : HST VI photometry of M33 star clusters (Chandar+, 2001) J/AJ/110/1649 : HST VI photometry near the M33 nucleus (Mighell+ 1995) J/AJ/110/2715 : UBV photometry in NGC 6822, M31 and M33 (Massey+ 1995) J/ApJS/99/551 : BVI photometry of massive stars in M33 and M31 (Hunter+ 1995) J/AcA/48/455 : Globular Clusters in M31 and M33 (Mochejska+, 1998) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 10 A10 "YYYY/MM/DD" Date UT date of observation 12 A1 --- f_Date [d] Indicates a photometric night with standards observed 14- 25 F12.4 d JD Julian date of observation 27- 30 A4 --- Field Field observed 32 A1 --- Band Filter band used 34 A1 --- Tel Telescope used (1) 36- 39 F4.2 arcsec See Telescope seeing
Note (1): F = Fred L. Whipple Observatory; M = MDM observatory.
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 3 A3 --- --- [D33] 4- 21 A18 --- D33 Designation JHHMMSS.s+DDMMSS.s (1) 23- 24 I2 h RAh Right ascension (J2000.0) 26- 27 I2 min RAm Right ascension (J2000.0) 29- 33 F5.2 s RAs Right ascension (J2000.0) 35 A1 --- DE- Declination sign (J2000.0) 36- 37 I2 deg DEd Declination (J2000.0) 39- 40 I2 arcmin DEm Declination (J2000.0) 42- 46 F5.2 arcsec DEs Declination (J2000.0) 48- 52 F5.2 mag Vmag Johnson V magnitude 54- 58 F5.2 mag Imag ?=99.99 CCD Cousins I magnitude 60- 64 F5.2 mag Bmag ?=99.99 CCD Johnson B magnitude 66- 69 F4.2 mag e_Vmag rms uncertainty on Vmag 71- 74 F4.2 mag e_Imag ?=9.99 rms uncertainty on Imag 76- 79 F4.2 mag e_Bmag ?=9.99 rms uncertainty on Bmag 81- 85 F5.2 --- JS V-band J_S_ variability index (Stetson, 1987PASP...99..191S) (2)
Note (1): D33 JHHMMSS.s+DDMMSS.s in Simbad Note (2): Candidate variables are selectioned if they met two requirements: a JS index larger than 0.75 and a V-band magnitude uncertainty larger than 0.04mag. The second criterion was introduced to remove bright stars with small variability.
History: From electronic version of the journal and copied at
(End) Greg Schwarz [AAS], Patricia Bauer [CDS] 24-Apr-2001
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

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