J/A+A/406/593 Galaxies in Southern Bright Star Fields I. (Baker+, 2003)
Galaxies in Southern Bright Star Fields I. Near-infrared imaging
Baker A.J., Davies R.I., Lehnert M.D., Thatte N.A., Vacca W.D.,
Hainaut O.R., Jarvis, M.J., Miley G.K., Roettgering H.J.A.
<Astron. Astrophys. 406, 593 (2003)>
=2003A&A...406..593B 2003A&A...406..593B
ADC_Keywords: Galaxies, photometry ; Infrared sources ; Photometry, infrared
Keywords: instrumentation: adaptive optics - galaxies: photometry -
infrared: galaxies - infrared: stars
Abstract:
As a prerequisite for cosmological studies using adaptive optics
techniques, we have begun to identify and characterize faint sources
in the vicinity of bright stars at high Galactic latitudes. The
initial phase of this work has been a program of Ks imaging
conducted with SOFI at the ESO NTT. From observations of 42 southern
fields evenly divided between the spring and autumn skies, we have
identified 391 additional stars and 1589 galaxies lying at separations
<60" from candidate guide stars in the magnitude range 9.0<R<12.4.
When analyzed as a "discrete deep field" with 131-arcmin2 area, our
dataset gives galaxy number counts that agree with those derived
previously over the range 16<Ks<20.5. This consistency indicates
that in the aggregate, our fields should be suitable for future
statistical studies. We provide our source catalogue as a resource for
users of large telescopes in the southern hemisphere.
Description:
Ks parameters of 1980 sources lying within an arcminute of one of 42
bright stars. To facilitate future extragalactic studies with adaptive
optics, the stars were selected to have blue colors, high galactic
latitudes, and intermediate southern declinations. For each fainter
source, Table 3 lists a unique designation (indicating the bright star
field, and the position of the source relative to the star within the
field), the estimated J2000.0 coordinates, the angular separation from
the bright star, the integrated Ks magnitude, the major and minor
axes, the position angle of the major axis, and the stellarity index.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 84 42 Parameters of 42 bright southern stars
table3.dat 71 1980 Ks parameters of 1980 sources lying within
an arcminute of one of 42 bright stars
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- --- [SBSF]
6- 7 I2 --- Field Field identifier used in Table 3 designations
9- 20 A12 --- USNO-B1.0 USNO-B1.0 designation for star (1)
22- 23 I2 h RAh Right ascension (J2000.0) (1)
25- 26 I2 min RAm Right ascension (J2000.0) (1)
28- 32 F5.2 s RAs Right ascension (J2000.0) (1)
34 A1 --- DE- Declination sign (J2000.0) (1)
35- 36 I2 deg DEd Declination (J2000.0) (1)
38- 39 I2 arcmin DEm Declination (J2000.0) (1)
41- 44 F4.1 arcsec DEs Declination (J2000.0) (1)
46- 49 I4 mas/yr pmRA Star proper motion in R.A. (J2000.0) (1)
51- 54 I4 mas/yr pmDE Star proper motion in Dec. (J2000.0) (1)
56- 59 F4.1 mag Bmag Star B magnitude (1)
61- 64 F4.1 mag Rmag Star R magnitude (1)
66- 70 F5.2 mag Kmag Star Ks magnitude
72- 76 A5 --- Dates Dates of SOFI imaging (2)
78- 79 I2 min Time Total SOFI integration time
81- 84 A4 --- Note Falls in an EIS Patch or near an NVSS source?
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Note (1): Value taken from Monet et al. (2003AJ....125..984M 2003AJ....125..984M)
as tabulated in VizieR Online Data Catalog I/284.
Note (2): Log of observations:
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Night Date Conditions
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1 2001/Feb/15 photometric
2 2001/Feb/17 photometric
3 2001/Mar/07 thin cirrus
4 2001/Oct/06 thin cirrus
5 2001/Oct/07 photometric
6 2001/Oct/08 photometric
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- --- [SBSF]
6- 15 A10 --- SBSF Source name (1)
17- 18 I2 h RAh Right ascension (J2000.0)
20- 21 I2 min RAm Right ascension (J2000.0)
23- 27 F5.2 s RAs Right ascension (J2000.0)
29 A1 --- DE- Declination sign (J2000.0)
30- 31 I2 deg DEd Declination (J2000.0)
33- 34 I2 arcmin DEm Declination (J2000.0)
36- 39 F4.1 arcsec DEs Declination (J2000.0)
41- 44 F4.1 arcsec Offset Source separation from bright star
46- 50 F5.2 mag Ksmag Source Ks magnitude
52- 56 F5.2 arcsec MajAxis Source major axis
58- 62 F5.2 arcsec MinAxis Source minor axis
64- 66 I3 deg PA Source major axis position angle (E of N)
68- 71 F4.2 --- SSI Source stellarity index (1=star, 0=galaxy)
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Note (1): Within the source name,
- bytes 6- 7 give the bright star field, as listed in table1
- bytes 8-11 give the right ascension offset from the star, in units of 0.1"
- bytes 12-15 give the declination offset from the star, in units of 0.1"
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Acknowledgements: Andrew Baker
(End) Andrew Baker [MPE Garching, Germany] 26-May-2003