J/A+AS/131/317 NGC 7331 HII regions catalogue (Petit 1998)
Catalogue of HII regions in NGC 7331 at the 6 meter telescope
Petit H.
<Astron. Astrophys. Suppl. Ser. 131, 317 (1998)>
=1998A&AS..131..317P 1998A&AS..131..317P (SIMBAD/NED BibCode)
ADC_Keywords: H II regions ; Positional data
Keywords: galaxies: ISM - HII regions - catalogues
Abstract:
A catalogue of HII regions in NGC 7331 is presented, with positions
relative to the center of the Galaxy and relative Hα fluxes.
Remarks:
In order to homogenize the presentation, we made approximations on
all data so that the catalogue is easily readable. If one needs more
accurate data one can look at the original publication.
For the galaxy NGC 7331, the photographic densities are converted into
arbitrary intensities using a relative photometric calibration.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
catalog.dat 81 252 NGC 7331 HII regions catalogue
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See also:
J/A+A/268/419 : HII Regions in NGC 4258 (Courtes+ 1993)
J/A+A/309/446 : HII Regions in M51 (Petit+, 1996)
J/A+AS/131/319 : HII Regions catalogue (Petit+ 1998)
Byte-by-byte Description of file: catalog.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- Galaxy Name of the galaxy (NGC 7331)
9- 14 A6 --- Object Object number (1)
15- 16 I2 h RAh Right ascension (1950) (2)
18- 19 I2 min RAm Right ascension (1950) (2)
21- 24 F4.1 s RAs Right ascension (1950) (2)
27 A1 --- DE- Declination sign
28- 29 I2 deg DEd Declination (1950) (2)
31- 32 I2 arcmin DEm Declination (1950) (2)
34- 35 I2 arcsec DEs ? Declination (1950) (2)
37- 40 I4 arcsec Xpos ? X value referred to galaxy centre (4) (3)
42- 45 I4 arcsec Ypos ? Y value referred to galaxy centre (4) (3)
47- 51 I5 10-19W/m2 FHa ? Hα flux value (4)
52 A1 --- n_FHa [*] *: FHa is not an absolute flux
56- 58 I3 arcsec DiamEff ? Effective diameter (4)
62- 64 I3 arcsec DiamGeo ? Geometric diameter (4)
68- 69 I2 [10-7W] logL ? Log Luminosity (4)
76- 77 I2 arcsec xdim ? x dimension of HII region (for M33 only)
79- 81 I3 arcsec ydim ? y dimension of HII region (for M33 only)
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Note (1): Origin of the HII regions numbers:
M33: Boulesteix et al., 1974A&A....37...33B 1974A&A....37...33B,
for number 1-1502 ()
Courtes et al., 1987A&A...174...28C 1987A&A...174...28C,
for number Z1-Z410 ()
M51: Petit et al., 1996, Cat. J/A+A/309/446 (<[PHB96] NNN>)
M81: Petit et al., 1988A&AS...74..475P 1988A&AS...74..475P ()
NGC 2403: Sivan et al., 1990A&A...237...23S 1990A&A...237...23S (<[SPC90] NNN>)
NGC 4258: Courtes et al., 1993, Cat. J/A+A/268/419 ([CPH93])
NGC 7331: This paper
Note (2): Position of the galaxy centre, expect for M33, where the position
is that of the HII region.
Note (3): Xpos and Ypos are axes ib the E-W and N-S directions respectively.
Note (4): No data for M 33.
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Acknowledgements: H. Petit, Observatoire de Marseille, F13248 Marseille Cedex 04
(End) Patricia Bauer [CDS] 23-Apr-1998