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16 papers · 2 filters
Observing with NIKA2Pol from the IRAM 30m telescope. Early results on the commissioning phase
A. Ritacco, R. Adam, P. Ade +41
The NIKA2 polarization channel at 260 GHz (1.15 mm) has been proposed primarily to observe galactic star-forming regions and probe the critical scales between 0.01-0.05 pc at which…
Systematics and accuracy of VLBI astrometry: What can be learned from a comparison with Gaia Data Release 2
Niu Liu, Sebastien Lambert, Zi Zhu +1
We aim to investigate the overall properties of the ICRF3 with the help of the Gaia Data release 2 (Gaia DR2). This could serve as an external check of the quality of the ICRF3. Th…
NIKA2 mapping and cross-instrument SED extraction of extended sources with Scanamorphos
H. Roussel, N. Ponthieu, R. Adam +38
The steps taken to tailor to NIKA2 observations the Scanamorphos algorithm (initially developed to subtract low-frequency noise from Herschel on-the-fly observations) are described…
A pulsar-based timescale from the International Pulsar Timing Array
G. Hobbs, L. Guo, R. N. Caballero +56
We have constructed a new timescale, TT(IPTA16), based on observations of radio pulsars presented in the first data release from the International Pulsar Timing Array (IPTA). We us…
Searching for Planets Orbiting Alpha Centauri A with the James Webb Space Telescope
Charles Beichman, Marie Ygouf, Jorge Llop Sayson +18
Alpha Centauri A is the closest solar-type star to the Sun and offers an excellent opportunity to detect the thermal emission of a mature planet heated by its host star. The MIRI c…
Active minimization of non-common path aberrations in long-exposure imaging of exoplanetary systems
Garima Singh, Raphaël Galicher, Pierre Baudoz +5
Context. Spectroscopy of exoplanets is very challenging because of the high star-planet contrast. A technical difficulty in the design of imaging instruments is the noncommon path…