J/ApJS/81/5 Green Bank neutral hydrogen survey (Schneider+, 1992)
Northern dwarf and low surface brightness galaxies.
II. The Green Bank neutral hydrogen survey.
Schneider S.E., Thuan T.X., Mangum J.G., Miller J.
<Astrophys. J. Suppl. Ser. 81, 5 (1992)>
=1992ApJS...81....5S 1992ApJS...81....5S
ADC_Keywords: Galaxy catalogs ; Surveys ; H I data
Keywords: galaxies: distances and redshifts - galaxies: irregular -
radio lines: atomic
Abstract:
Neutral hydrogen observations at 21cm, made at the Green Bank 91m
telescope in 1984, 1985 and 1986, of a large sample of dwarf and other
low surface brightness galaxies are presented. The majority of
galaxies classified in the Uppsala General Catalogue as dwarf,
irregular, Sdm, or later and with declinations north of the range of
the Arecibo telescope (δ>38°) have been observed, along with
a number of galaxies farther south for flux comparisons with Arecibo
observations (Schneider et al., 1990ApJS...72..245S 1990ApJS...72..245S, Paper I),
totaling over 600 galaxies. About half of these galaxies have no
previously published detections. In total, counting previous
detections, over 80% of these late-type systems are detected at Green
Bank. We have examined the galaxies for potential confusion with
nearby galaxies, and we also present substantially better
signal-to-noise measurements for many previously detected galaxies.
Some general results of the Green Bank survey are discussed here, but
the total data base of northern dwarf and low surface brightness
galaxies, including new measurements of the galaxies' photographic
magnitudes, will be examined in subsequent papers.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 112 443 Detections of dwarf and LSB galaxies
table2.dat 122 83 Uncertain and confused HI detections
table3.dat 47 111 Nondetections
notes.dat 80 286 Individual notes
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Byte-by-byte Description of file: table1.dat table2.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- UGC UGC name (UNNNNN or UANNNN)
7 A1 --- m_UGC Multiplicity index on UGC
9- 10 I2 h RAh Right ascension (1950)
12- 13 I2 min RAm Right ascension (1950)
15- 18 F4.1 s RAs Right ascension (1950)
20 A1 --- DE- Declination sign (1950)
21- 22 I2 deg DEd Declination (1950)
24- 25 I2 arcmin DEm Declination (1950)
27- 28 I2 arcsec DEs Declination (1950)
30- 32 F3.1 arcmin Sep ? Offset separation angle
34- 36 I3 deg PA ? Offset position angle
38- 40 F3.1 arcmin MajAxis Semi-major axis
42- 44 F3.1 arcmin MinAxis Semi-minor axis
46- 48 I3 deg PAd ? Dimension position angle
50- 59 A10 --- MType Morphological type
61- 64 I4 km/s HV Heliocentric velocity
66- 67 I2 km/s e_HV rms uncertainty on HV
69- 71 I3 km/s W50 Width of the HI profile at 50% of peak
73- 74 I2 km/s e_W50 rms uncertainty on W50
76- 78 I3 km/s W20 Width of the HI profile at 20% of peak
80- 81 I2 km/s e_W20 ? rms uncertainty on W20
83- 88 F6.2 Jy.km/s FluxObs Observed flux at 21cm (1.4GHz)
90- 93 F4.2 Jy.km/s e_FluxObs rms uncertainty on FluxObs
95-100 F6.2 Jy.km/s FluxCor ? Corrected 21cm flux
102-105 F4.2 Jy.km/s e_FluxCor ? rms uncertainty on FluxCor
107-108 I2 yr OBSyr Observing year (1900+)
110 A1 --- Fig [*] *: Spectrum shown in Fig. 1
112 A1 --- Note [N] N: note detailed in notes.dat file
114-122 A9 --- Notes Notes (in table2 only)
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Byte-by-byte Description of file: notes.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- UGC UGC name (UNNNNN)
8- 79 A72 --- Note Text of the note
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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- 6 A6 --- UGC UGC name (UNNNNN or UANNNN)
7 A1 --- m_UGC Multiplicity index on UGC
9- 10 I2 h RAh Right ascension (1950)
12- 13 I2 min RAm Right ascension (1950)
15- 18 F4.1 s RAs Right ascension (1950)
20 A1 --- DE- Declination sign (1950)
21- 22 I2 deg DEd Declination (1950)
24- 25 I2 arcmin DEm Declination (1950)
27- 28 I2 arcsec DEs Declination (1950)
30- 33 I4 km/s SRl Lower limit of the search range
35- 39 I5 km/s SRu Upper limit of the search range
41- 44 F4.1 mJy rms rms
46 A1 --- Note [N] Individual note in notes.dat file
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History: Prepared via OCR at CDS.
References:
Schneider et al., Paper I. 1990ApJS...72..245S 1990ApJS...72..245S
(End) James Marcout, Patricia Bauer [CDS] 20-Sep-1999