We present our on-going project to unveil the post-nova population by
re-discovering old novae that have been lost after the initial outburst
and in which the binary itself is unobserved. We take UBVR photometry
for candidate selection, long-slit spectroscopy to confirm these
candidates, and time-resolved spectroscopy to measure the orbital period
of the newly confirmed post-novae. Some preliminary results are shown as
examples.
JPCam is a 14-CCD mosaic camera, using the new e2v 9k-by-9k
10microm-pixel 16-channel detectors, to be deployed on a dedicated 2.55m
wide-field telescope at the OAJ (Observatorio Astrofisico de Javalambre)
in Aragon, Spain. The camera is designed to perform a Baryon Acoustic
Oscillations (BAO) survey of the northern sky. The J-PAS survey strategy
will use 54 relatively narrow-band (~13.8nm) filters equi-spaced between
370 and 920nm plus 3 broad-band filters to achieve unprecedented
photometric red-shift accuracies for faint galaxies over ~8000 square
degrees of sky. The cryostat, detector…
Sabato 26 Gennaio p.v., il professor Polcaro terrà una conferenza all’osservatorio Virginio Cesarini a Frasso Sabino.
La conferenza esaminerà come si è evoluto il concetto di tempo dell’umanità, partendo da quello delle prime tribù di cacciatori-raccoglitori della Preistoria (come si è potuto ricavare da studi archeologici ed antropologici), per arrivare a quello della fisica moderna, discutendo brevemente l’evoluzione che questo concetto ha attraversato dalle prime civiltà urbane alla filosofia classica e successivamente dal Medioevo al Rinascimento ed alla fisica newtoniana.
The AGN unified scenario suggests that the Seyfert 2 galaxies are the
obscured counterparts of Seyfert 1 galaxies where the difference is
caused only by the orientation of the object. Optical microvariability
is supposed to arise from the regions which are closer to the
supermassive black hole at the center of the AGN. The search for
microvariability is an important test for the AGN unified scenario,
since we assume that the variability of obscured AGNs should be
happening on long time scales (compared to the unobscured AGNs). We
present first results from the microvariability campaign…
