An our preceding paper concerning the 3 domes
in Rima Birt has been publishe in ALPO Journal .
In our paper ( we showed the presence of 3 domes , two of them are bisected
by the Rima itself.
The ALPO catalog was update on 21 October 1999 with the introduction of the dome corresponding at -161-349 (Xi and Eta coordinate).
Furthermore the GLR group has classified the dome as DW/2a/6f/9j using the Westfall scheme.
We noticed that the UAI Lunar
Section does not report any reference about GLR research of the domes
field in the Rima Birt region in web site and in a short commuication published
on the italian magazine Astronomia UAI (1, 2000).
We believe that our researches have shown already the morphology
of these domes.
Furthermore the
Journal provide a clear encoded description of the dome located
at -161-349.
The confirmation of our study has been obtained by several
observers which submitted to GLR group new images. The extension of the
Rima Birt and the presence of the bisected domes is documented very well.
A next paper is in progress.
The new CCD images and drawings showed
the described Rima and the presence of three domes.
Inresting is the presence of the 2 rilles of Rima Birt complex. Amatorial
telescope can separate them.
Alessandro Bares, image made on Mewlon 250
mm - april 2, 2001 at 20:30 UT. Interesting image of the Rima Birt and its extension
. This is a detailed image of the region showing the two rilles.
Daniel Del Valle- Observation carried out on 28 september 2001 at 00:15 UT using a SCT 20 cm f/10 (339x). Seeing II Antoniadi.
Giancarlo Favero- Newton 355 mm f/5,6. The image shows the
3 domes of Birt.
Giorgio Mengoli (14 march 2000 at 17.49 U.T)
refractor 152-ED
Camera ccd: HX516 Starlight-Xpress (0.12 secs, Barlow 1.83x,
Meade #126)
Software: Pix_WIN 2.5 - AstroArt 1.5
Elaboration median filter 5x, adactive filter+filter
high contrast x2, average of 10
frames.
Massimo Cicognani - on 13 february
2000 at 19.30 UT- Cassegrain 41 cm f/17 at 284-460x
Rima Birt and domes.
Piergiovanni Salimbeni, SCT 20 cm f/10 250x,
Rima Birt and the norther dome.
Roberto Porta - on 14 March 2000 at 17.45 UT- SCT 8" (200mm
f/10) at 250x
FILTERS W8 (yellow). Rima Birt and domes.
Giorgio Mengoli Refractor 152 ED - Geometric deformation .
In this frame is visible Rupes Recta and Rima Birt.
Conclusion
The Rima Birt is irregulary and has an offset in its mid-section;
the our data show that the Rima could represent extension and faulting due to
dike intrusion.
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Rome January, 9, 2002