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NGC 1097
Bennett 10
Arp 77, ESO416-G020
RA 02:46:18
Dec -30°16.4'
Galaxy 
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H V-048: vB, E 76 degrees np-sf, 8' long. A
very bright nucleus, confined to a small part, or about 1' diameter.
h: B, L, vmE, pspmbM, 3' long; pos = 151.1
degrees; B, L, vmE, psvmbM to a pL, R nucleus; 4' long, 40" broad.
William P. Clarke (San Diego, California, USA)
writes in the The Webb Society Nebulae and Clusters Section Report No. 10, July
1992: "Highly elongated galaxy with a bright nucleus and a second bright
region to one side, probably the small companion galaxy. (21-inch f/20, x140)."
Tom Lorenzin: “10.6M; 9'x 5' extent;
barred spiral with very bright nucleus”
Steve Coe: “pF, pL, somewhat elongated
and somewhat brighter in the middle at 135X in my old 17.5 inch Dobsonian. Using
my 13" f/5.6 at 135X it was pB, pL, mE 3 X 1 in PA 135 and mbM.”
Steve Gottlieb, 17.5-inch: “vB, vL, very
elongated NW-SE, very bright core. A companion galaxy N1097A is attached at the
NW end.”; 8-inch: “bright, elongated NW-SE, bright core.”
Green, M. R. & Dixon, K. L. (1978) “Photoelectric
photometry of bright southern galaxies”, Vol 98, August, p 167-169. They
find the V magnitude through a 28’’ aperture = 11.6, and through a 80’’
aperture = 11.0.
Listed as No. 77 in Arp's "Atlas of
Peculiar Galaxies" (Astrophysical Journal Supplement, vol. 14, 1966.) He
remarks "material of arm seems to flow 'around' companion. Similar to Arp
26. [NGC 5457]."
Tom Polakis, sci.astro.amateur posting (27 Jan
1998): “While processing the latest batch of CCD images, I was impressed by
the inner structure of NGC 1097, a barred spiral galaxy in Fornax. The Digital
Sky Survey image shows the classic form, with a bar about 5' long leading to
curved arms. My backyard CCD image barely shows these arms over the noise of the
city sky. Much more interesting, though, is the 'spiral within a spiral' in the
40-arcsecond disc of the core. The image may be seen at
http://www.psiaz.com/polakis/ccd/gx/n1097.jpg.
My impression before going
out into the field to observe it was that the outer arms would be difficult, and
the inner structure spectacular. The object yielded the opposite result. Using a
20-inch at a dark desert site, the outer arms were quite visible even to a
novice observer. The bright inner spiral was only a bright, mottled disc. This
detail may be more seeing dependent than anything -- sort of like looking for
detail on Jupiter. Despite great transparency, the seeing was no better than 3
or 4 arcseconds on the night of my observation.
Luginbuhl and Skiff mention
a faint stellar nucleus surrounded by a small oval core, 35" across. They
saw this detail in 6-inch and 10-inch telescopes. I'm looking forward to another
look at NGC 1097 on a steadier night. I'd be interested to hear about any other
observations of the inner region of this galaxy.”
11x80: “Just visible
with averted vision as a round haze.” (exburban skies, seeing 3,
transparency 3, sky darkness 4, lim.mag. at south pole 6.0 (naked eye) Strong SE
wind) [AS] |
