J/AJ/128/224 VI photometry in M33 outer regions (Tiede+, 2004) ================================================================================ The stellar populations in the outer regions of M33. I. Metallicity distribution function. Tiede G.P., Sarajedini A., Barker M.K. =2004AJ....128..224T ================================================================================ ADC_Keywords: Galaxies, photometry ; Photometry, UBVRI ; Photometry, CCD Keywords: galaxies: halos - galaxies: individual (M33) - galaxies: spiral - galaxies: stellar content - galaxies: structure - Local Group Abstract: We present deep CCD photometry in the VI passbands using the WIYN 3.5m telescope of a field located approximately 20 southeast of the center of M33; this field includes the region studied by Mould & Kristian in 1986ApJ...305..591M. The color-magnitude diagram (CMD) extends to I~25 and shows a prominent red giant branch (RGB), along with significant numbers of asymptotic giant branch and young main-sequence stars. Description: Our data were obtained with the WIYN 3.5m telescope at Kitt Peak National Observatory on the night of 1999 March 10 UT. The night of 1999 March 10 UT was not perfectly photometric, so in order to photometrically calibrate the data we obtained a set of Landolt standards and short exposures of the same M33 fields on 2002 February 11 UT. These calibration data were taken with the WIYN 0.9m telescope on Kitt Peak using the same S2KB CCD imager mounted at the Cassegrain focus. File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file table4.dat 54 19350 Calibrated Stellar Photometry and Positions -------------------------------------------------------------------------------- See also: J/A+A/366/498 : VI photometry of M33 star clusters (Chandar+, 2001) J/AJ/110/1649 : VI photometry near the M33 nucleus (Mighell+ 1995) Byte-by-byte Description of file: table4.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 5 I5 --- [TSB2004] Identification number 7- 8 I2 h RAh Hour of right ascension (J2000) 10- 11 I2 min RAm Minute of right ascension (J2000) 13- 17 F5.2 s RAs Second of right ascension (J2000) 18 A1 --- DE- Sign of declination (J2000) 19- 20 I2 deg DEd Degree of declination (J2000) 22- 23 I2 arcmin DEm Arcminute of declination (J2000) 25- 28 F4.1 arcsec DEs Arcsecond of declination (J2000) 30- 35 F6.3 mag Imag The I-band (Harris) magnitude 37- 41 F5.3 mag e_Imag Error in Imag 43- 48 F6.3 mag V-I The (V-I) colour 50- 54 F5.3 mag e_V-I Error in V-I -------------------------------------------------------------------------------- History: From electronic version of the journal ================================================================================ (End) Greg Schwarz [AAS], Patricia Vannier [CDS] 17-Jan-2005