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J/AJ/117/206        LMC far-ultraviolet imaging              (Brosch+, 1999)

Far-ultraviolet imaging of the field star population in the Large Magellanic Cloud with the Hubble Space Telescope. Brosch N., Shara M., Mackenty J., Zurek D., McLean B. <Astron. J. 117, 206 (1999)> =1999AJ....117..206B
ADC_Keywords: Magellanic Clouds ; Photometry, ultraviolet Mission_Name: HST Keywords: galaxies: individual (Large Magellanic Cloud) - galaxies: irregular - galaxies: stellar content - stars: formation Abstract: We present an analysis of the deepest pure UV observations with the highest angular resolution ever performed, a set of 12 exposures with the Hubble Space Telescope (HST) Wide Field Planetary Camera 2 and F160BW filter obtained in parallel observing mode, which covers ∼12arcmin2 in the Large Magellanic Cloud (LMC), north of the bar, and in the "general field" regime of the LMC. The 341 independent measurements of 198 objects represent an accumulated exposure of ≥2x104s and reveal stars as faint as mUV~=22mag. The observations show that about two-thirds of the UV emission from the LMC is emitted by our HST-detected UV stars in the field, that is, not in clusters or associations. We identified optical counterparts in the Royal Observatory Edinburgh/Naval Research Laboratory photometric catalog for about one-third of the objects. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 46 12 WFPC2 data sets analyzed in this paper table2.dat 69 341 Far-UV raw photometry of field stars in the LMC table3.dat 42 198 Far-UV photometry of field stars in the LMC table4.dat 31 65 LMC UV objects with UIT counterparts table5.dat 26 58 LMC UV objects with ROE/NRL counterparts
Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1 A1 --- Set DataSet 3- 11 A9 --- Name Name of the image 13- 14 I2 h RAh Right ascension (J2000.0) 16- 17 I2 min RAm Right ascension (J2000.0) 19- 22 F4.1 s RAs Right ascension (J2000.0) 24 A1 --- DE- Declination sign (J2000.0) 25- 26 I2 deg DEd Declination (J2000.0) 28- 29 I2 arcmin DEm Declination (J2000.0) 31- 32 I2 arcsec DEs Declination (J2000.0) 34- 37 I4 s Exp Exposure time 39- 46 A8 "DD/MM/YY" Date Observation date
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 3 I3 --- [BSM99] Source number 4 A1 --- m_[BSM99] [ab] Multiplicity index on [BSM99] 6- 12 F7.3 pix Xpos X position 14- 20 F7.3 pix Ypos Y position 22- 23 I2 h RAh Right ascension (J2000.0) 25- 26 I2 min RAm Right ascension (J2000.0) 28- 33 F6.3 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 A1 --- Set Set designation 49 A1 --- --- [,] 51- 53 A3 --- Chip Chip (pc, wf2, wf3, wf4) 55 A1 --- F160BW [V] V: F160BW magnitude in FUV value 57- 62 F6.3 mag FUV ? FUV (1491Å) magnitude 64- 68 F5.3 mag e_FUV ? rms uncertainty on FUV 69 A1 --- n_FUV [I] I: Indefinite
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 3 I3 --- [BSM99] Sequential number 4 A1 --- m_[BSM99] [ab] Multiplicity index on [BSM99] 6 I1 --- nObs Number of observations 8- 9 I2 h RAh Right ascension (J2000.0) 11- 12 I2 min RAm Right ascension (J2000.0) 14- 18 F5.2 s RAs Right ascension (J2000.0) 20 A1 --- DE- Declination sign (J2000.0) 21- 22 I2 deg DEd Declination (J2000.0) 24- 25 I2 arcmin DEm Declination (J2000.0) 27- 31 F5.2 arcsec DEs Declination (J2000.0) 33- 37 F5.2 mag FUV Mean FUV (1491Å) magnitude 39- 42 F4.2 mag e_FUV rms uncertainty on FUV
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 5 I5 --- [PHC98] UIT identification number, Parker et al., 1998, Cat. J/AJ/116/180 7- 11 F5.2 mag B1mag UIT B1 (1521Å) magnitude 13- 16 F4.2 mag e_B1mag rms uncertainty on B1mag 18- 20 I3 --- [BSM99] HST counterpart 22- 26 F5.2 mag UVmag HST UV magnitude 28- 31 F4.2 mag e_UVmag rms uncertainty on UVmag
Byte-by-byte Description of file: table5.dat
Bytes Format Units Label Explanations
1- 4 I4 --- ROE/NRL ROE/NRL sequential number, (Yentis et al., 1992, Digitized Optical Sky Surveys, p.67, Wallin et al., 1994BAAS...84.2704W) 6- 10 F5.2 mag UVmag UV magnitude 12- 15 F4.2 mag e_UVmag rms uncertainty on UVmag 17- 21 F5.2 mag UV-V UV-V colour index 23- 26 F4.2 mag e_UV-V rms uncertainty on UV-V
History: From AJ electronic version
(End) James Marcout, Patricia Bauer [CDS] 26-Feb-1999
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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