JPCam is a 14-CCD mosaic camera, using the new e2v 9k-by-9k 10
μm-pixel 16-channel detectors, to be deployed on a dedicated 2.55 m
wide-field telescope at the OAJ (Observatorio Astrofísico 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 ( 13.8 nm) filters
equi-spaced between 370 and 920 nm plus 3 broad-band filters to achieve
unprecedented photometric red-shift accuracies for faint galaxies over
8000 square degrees of sky. The cryostat, detector…
We analyse the rest-frame ultraviolet (UV) to near-infrared (near-IR)
spectral energy distribution (SED) of Lyman-break galaxies (LBGs),
star-forming (SF) BzK (sBzK) and UV-selected galaxies at 1.5 ≲ z
≲ 2.5 in the COSMOS, GOODS-N and GOODS-S fields. Additionally, we
complement the multiwavelength coverage of the galaxies located in the GOODS fields with deep far-infrared (FIR) data taken from the GOODS-Herschel project. According to their best-fitting SED-derived
properties we find that, because of their selection criterion involving
UV measurements, LBGs tend to be UV-brighter and bluer…
After the luminosity minimum of 2007-2008 (V=18.6, Polcaro et al. 2011,
AJ, 141, 18) and a moderate luminosity maximum at beginning 2011
(V=17.8), the Luminous Blue Variable GR290/Romano’s Star in M33 has
reached a new deep minimum with V=18.7 and R=18.4 in December 2013 which
appears to be the deepest so far recorded in its known light history.
Significant luminosity oscillations have been observed during the
2011-2013 declining phase.
La stella LBV (luminous blue variable) GR290 in M33, tenuta sotto controllo dalla nostra associazione, ha raggiunto un nuovo minimo di luminosità: rispetto al massimo avuto a Gennaio 2011, ora la stella è circa una magnitudine più debole su tutte le bande ottiche.
We study the characteristics of a narrow band type Ia supernova survey
through simulations based on the upcoming Javalambre Physics of the
accelerating universe Astrophysical Survey (J-PAS). This unique survey
has the capabilities of obtaining distances, redshifts, and the SN type
from a single experiment thereby circumventing the challenges faced by
the resource-intensive spectroscopic follow-up observations. We analyse
the flux measurements signal-to-noise ratio and bias, the supernova
typing performance, the ability to recover light curve parameters given
by the SALT2 model, the…
