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J/ApJS/130/177 Arecibo Dual-Beam Survey (Rosenberg+, 2000)
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The Arecibo Dual-Beam Survey: Arecibo and VLA observations.
Rosenberg J.L., Schneider S.E.
<Astrophys. J. Suppl. Ser. 130, 177 (2000)>
=2000ApJS..130..177R
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ADC_Keywords: Galaxies, radio ; H I data ; Radio lines ; Radial velocities
Keywords: galaxies: fundamental parameters - galaxies: ISM -
radio lines: galaxies - surveys
Abstract:
The Arecibo Dual-Beam Survey is a "blind" 21 cm search for galaxies
covering ~430deg^2^ of sky. We present the data from the detection
survey as well as from the follow-up observations to confirm
detections and improve positions and flux measurements. We find 265
galaxies, many of which are extremely low surface brightness. Some of
these previously uncatalogued galaxies lie within the zone of
avoidance, where they are obscured by the gas and dust in our Galaxy.
Eighty-one of these sources are not previously catalogued optically,
and there are 11 galaxies that have no associated optical counterpart
or are only tentatively associated with faint wisps of nebulosity on
the Digitized Sky Survey images. We discuss the properties of the
survey, and in particular we make direct determinations of the
completeness and reliability of the sample. The behavior of the
completeness and its dependencies is essential for determining the H I
mass function. We leave the discussion of the mass function for a
later paper, but do note that we find many low surface brightness
galaxies and seven sources with M_HI_<10^8^M_{sun}_.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 104 265 Galaxy Detection Data
table3.dat 83 265 Optical Source Information
table4.dat 88 22 Sources Without an Identified Optical Counterpart
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- ADBS Name (ADBS JHHMMSS+DDMM in Simbad)
12 A1 --- f_ADBS [*] Flag added at CDS, see "History" section below
13 I1 --- Nobs Number of ADBS detections
15- 16 I2 h RAh Right ascension (2000)
18- 19 I2 min RAm Right ascension (2000)
21- 24 F4.1 s RAs Right ascension (2000)
26 A1 --- DE- Declination sign (2000)
27- 28 I2 deg DEd Declination (2000)
30- 31 I2 arcmin DEm Declination (2000)
33- 36 F4.1 arcsec DEs Declination (2000)
38- 41 F4.2 mJy rms1 rms of first source's detection spectra
43- 46 F4.2 mJy rms2 ? rms of second source's detection spectra
48- 53 F6.3 Jy.km/s AFlx ? Arecibo flux (21cm)
54 A1 --- n_AFlx [j] Note on AFlx (2)
56- 62 F7.3 km/s ADV20 ? Arecibo measured velocity width at 20% of peak
64- 70 F7.3 km/s ADV50 ? Arecibo measured velocity width at 50% of peak
72- 79 F8.3 km/s AHV ? Arecibo heliocentric corrected center velocity
81- 87 F7.3 Jy.km/s VFlx ? VLA flux
89- 95 F7.3 km/s VDV50 ? VLA measured velocity width at 50% of peak
97-104 F8.3 km/s VHV ? VLA heliocentric corrected center velocity
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Note (2): Individual note:
j: NGC 4294 was not distinguished from NGC 4299 in the original detection
lists, although both were visible, so the "DECscan" position was between
the two. The flux, line width, and velocity values listed here are from
Helou, Hoffman, & Salpeter, 1984ApJS...55..433H.
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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- 11 A11 --- ADBS Name (ADBS JHHMMSS+DDMM in Simbad)
13- 34 A22 --- Names Optical names
35 A1 --- n_Names [bdefg] Note on Names (2)
37- 44 F8.4 deg GLON Galactic longitude
46- 53 F8.4 deg GLAT Galactic latitude
55- 60 F6.3 mag AV Reddening in V band
62- 68 F7.3 arcsec Diam ? Diameter (1)
69 A1 --- n_Diam [c] Note on Diam (2)
71- 75 F5.3 --- Ell ? Ellipticity (1)
77- 83 F7.3 deg PA [-90/90]? Position angle (1)
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Note (1): Diameter, ellipticity, and position angle determined by
SExtractor on DSS images.
Note (2): Individual notes:
b: Interacting galaxies for which we estimate the size of the whole system
by eye.
c: POSS I image used because POSS II image was not available.
d: This detection might be associated with UGC 3376, but it is not clear.
e: SExtractor was unable to fit this galaxy so the UGC value was used.
f: This H I detection is far from the center of M64, but it lies along the
major axis and the VLA map shows an elliptical structure aligned with
the major axis. This is is probably a detection of an extremely extended
H I envelope around M64. The M64 parameters given are the UGC values.
g: There is probably a second source slightly blended with this one at the
same right ascension, but at a higher declination. It is hard to
discern how much this other source contributed to the actual detection
and if it could have been detected independently.
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- ADBS Name (ADBS JHHMMSS+DDMM in Simbad)
13- 20 F8.4 deg GLAT Galactic longitude
22- 27 F6.3 mag AV Reddening in V band
29- 35 A7 --- Plate POSS plate (I or II) examined
37- 96 A60 --- Com Comments
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History:
From electronic version
* 05-May-2001: Modifications made at CDS (flagged by * in byte 12 of table2)
table3: "FGG 0436" corrected to "FGC 0436"
table2: ADBS name 020045+2809 was changed into 020044+2809
to be consistent with its name in tables 3 and 4.
In 3 cases, the optical sources reported are several arcminutes away
from the radio position:
070911+2038 vs 070920+2038: the radio position corresponds to NGC
2341, while the optical position corresponds to NGC 2342
153703+2009 vs 153713+2009: 2' away
184351+2011 vs 184335+2007: 4' away
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(End) James Marcout, Patricia Bauer [CDS] 05-Dec-2000