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Notes for object NGC 6503

15 note(s) found in NED.


1. 2008MNRAS.388..500E
Re:UGC 11012
UGC 11012 (NGC 6503). This galaxy has a strong H{alpha} emission all over its
disc, with a faint extended feature on the western edge (~2 arcmin from the
centre). This faint extension cannot be seen in the H{alpha} map from Strickland
et al. (2004). Our rotation curve clearly reaches a plateau around 80 arcsec,
well before the optical limit. Several optical rotation curves are found in the
literature but none of them takes this extension into account and their
extension is limited to ~80 arcsec, whereas ours extends up to 150 arcsec (for
the receding side, owing to the mentioned H{alpha} extension). Nevertheless,
these rotation curves (de Vaucouleurs & Caulet 1982; Karachentsev & Petit 1990)
are in very good agreement with our H{alpha} rotation curve. H{beta}
observations made by Bottema (1989) also show a rotation curve in good agreement
with ours. The H I map obtained by Begeman (1987) is more extended than our
H{alpha} map otherwise both velocity fields are in good agreement, as well as
the derived rot ation curves. The parameters computed in H I with a tilted ring
model (PA = -59.4^deg^, i = 73.8^deg^) are in very good agreement with our own
parameters.

2. 2008ApJS..174..337M
Re:NGC 6503
NGC 6503 (Fig. 5o).-The elliptically shaped ring contains 84 resolved H II
regions in this unbarred spiral. No gradients are evident.

3. 2007MNRAS.382.1552L
Re:NGC 6503
NGC 6503: Fig. 2 shows a bright central nucleus. The nuclear spectrum shows
prominent LINER emission lines and a red continuum with strong absorption
features. Chandra observations show a very weak compact source coincident with
the galaxy nucleus (Appendix B).

4. 2004ApJS..151..193S
Re:NGC 6503
4.2.8. NGC 6503 NGC 6503 is a low-mass Sc galaxy, similar in size, mass,
blue luminosity, and infrared warmth to M33 (de Vaucouleurs & Caulet
1982; Rice et al. 1988). While otherwise an unremarkable galaxy, it has
a compact, low-velocity dispersion nucleus (Bottema & Gerritsen 1997),
best classified as a borderline starburst-LINER (Lira, Johnson, &
Lawrence 2002).
The moderate values of the IRAS f_60_/f_100_ flux ratio and star
formation rate given in Table 1 imply that NGC 6503 as a whole should
not be considered as a starburst galaxy.
Diffuse X-ray emission, first reported by Lira et al. (2002), is weak,
and confined exclusively within the optical confines of the disk of NGC
6503 (see Fig. 11). We can only place upper limits on diffuse X-ray
emission from the halo. The nucleus of the galaxy is marked by a very
weak X-ray point source (see Lira et al. 2002 for more discussion of the
point sources), and there is no obvious concentration of the diffuse
X-ray emission toward the nucleus.

5. 2003A&A...398..479K
Re:NGC 6503
NGC 6503. NGC 6503 is a Sc galaxy located at the edge of the Local
Void. The galaxy was resolved into stars for the first time by
Karachentsev & Sharina (1997), who derived its distance modulus to be
28.57m +/- 0.40m. Our HST observations were directed to the North-West
edge of NGC 6503, which is less contaminated by blue stars. The left CMD
in Fig. 2 corresponds to the entire WFPC2 field. The right one shows the
stellar population in the halo region only (outer parts of WF2 and
WF4). For the halo stars we determined the TRGB position at I(TRGB) =
24.62m +/- 0.21m, which yields a distance modulus of 28.61m +/- 0.23m.

6. 2002AJ....124..675C
Re:UGC 11012
The F17499+7009 identification is correct for this large galaxy
despite the large optical/FSC offset.

7. 2001ApJS..137..139S
Re:NGC 6503
NGC 6503. - We adopt the bright star distance from
Karachentsev & Sharina (1997).

8. 2000MNRAS.319...17L
Re:NGC 6503
NGC 6503: The nucleus of this galaxy has been classified as a combination
of a transition object and a Seyfert 2 nucleus by Ho et al. (1995). The
ROSAT HRI observations in Fig. 28 show extended and elongated emission
close to the central region of the galaxy. This diffuse emission can be
better appreciated in Fig. 38, where the X-ray image has been smoothed
using a Gaussians with {sigma} = 8 arcsec. The extended source lies
~10 arcsec away from the galactic nucleus. The astrometric solution of the
HRI observation has been confirmed using two bright X-ray sources in the
field with optical counterparts, and therefore the location of the diffuse
emission is probably off-nuclear. Notice, however, that the astrometric
checks carried out in Section 3.2.2 assumed a point-source distribution
of counts, while the source seen in NGC 6503 is clearly extended, implying
possible errors in the determination of the centroid of the emission. The
shape and energetics of the diffuse emission could be explained within the
superwind model for starburst galaxies. More detailed observations are
necessary to confirm this hypothesis.

9. 2000ApJS..129...93F
Re:NGC 6503
NGC 6503. - We do not detect radio emission from this galaxy on the
full-resolution or on the tapered maps. The 1.4 GHz data (NVSS and
Condon 1987) indicate a northwest-southeast extended ~ 40 mJy source,
which consequently must be diffuse.
We also detect a background source, about 6' to the southwest. Due
to the large distance from the phase center, which implies a large and
uncertain primary-beam correction, we cannot assess the flux density of
this source. The source appears as a 16.9 mag stellar-like object on the
POSS plates. We have identified this object with the BL Lacertae source
1749+701 at redshift 0.77 (Hughes, Aller, & Aller 1992). This object has
been extensively observed at other radio frequencies and is included in
the WENSS (Rengelink et al. 1997) as well as BWE91 and WB92. The only
other 8.5 GHz measurement of this source comes from Patnaik et al.
(1992). They measure 558 mJy with the VLA A configuration.
Table 3 summarizes the properties of the background sources,
including the previously identified, as well as the new,
identifications. Tabulated 8.4 GHz fluxes have been corrected for
primary-beam attenuation.

10. 1994CAG1..B...0000S
Re:NGC 6503
Sc(s)II.8
PH-7687-S
Sep 26/27, 1979
103aO
5 min
Racine wedge
The spiral pattern in NGC 6503 is similar
to the multiple-armed structure of NGC 488, but
is much later, and the arms are not as well
defined.
The well-determined redshift of NGC 6503
is small, at v_o = 303 km/s. Individual stars and
HII regions resolve out of the high-surface-brightness
background on a red-sensitive plate
taken with the Palomar 200-inch telescope, but
the resolution in the blue on the print here is not
nearly as prominent. Incipient resolution into
stars occurs in one of the outer arms that is not
silhouetted against the high-surface-brightness
disk, but the exposure on the original plate used
here is short, made to see the central regions
rather than the individual stars that begin to
resolve out at about B = 20.

11. 1976RC2...C...0000d
Re:NGC 6503
Photograph:
Ap. J., 139, 539, 1964.
Photometry:
Mem. S.A. Ital., 38, 189, 1967 = Cont. Asiago Obs. No. 194.
Photometry (5 Color):
A.J., 73, 313, 1968.
Spectrum:
Ap. J., 139, 539, 1964.
Spectrophotometry:
Sov. A.J., 16, 628, 1973.
Dynamics and Rotation Curve and Mass Determination:
Ap. J., 139, 539, 1964.
Mem. S.A. Ital., 38, 189, 1967.
Astr. Ap., 8, 364, 1970.
HII Regions:
Ap. J. Suppl., 27, No. 239, 1974.

12. 1973UGC...C...0000N
Re:UGC 11012
SA(s)cd (de Vaucouleurs), Sc- (Holmberg)

13. 1964RC1...C...0000d
Re:NGC 6503
Very small, very bright nucleus. Very many knotty, bright arms in a lens.
Very faint outer extensions.
Heidelberg Veroff. Vol. 9, 1926 and Lick 13 dimensions are for the bright part
only.
Spectrum:
Lick Obs. Bull., 497, 1939.
Ap. J., 135, 698, 1962.
Rotation:
Ap. J., 97, 117, 1943 = MWC 674.

14. 1956AJ.....61...97H
Re:NGC 6503
HMS Note No. 196
Auroral and dawn spectra confused with the nebular spectrum.

15. 1918PLicO..13....9C
Re:NGC 6503
A fine bright spiral 5' x 1' in p.a. 125^deg^. Rather faint, almost stellar
nucleus. Marked absorption effects on southwestern edge. Whorls are compact,
patchy, and indistinct. See Abs. Eff. 14 s.n.


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