F. Pajot

Evolution of dust properties in an interstellar filament

We present submillimetre observations obtained using the balloon-borne experiment PRONAOS/SPM, from 200 to 600xa0 μ m with an angular resolution of 2–3.5′, of a quiescent dense filament (typically

Planck pre-launch status: The HFI instrument, from specification to actual performance

A_{V} sim 4

Planck pre-launch status: High Frequency Instrument polarization calibration

) in the Taurus molecular complex. This filament, like many other molecular clouds, presents a deficit in its IRAS

Planck pre-launch status: The optical architecture of the HFI

I_{rm 60 ,mu m}/I_{rm 100 ,mu m}

Planck Pre-Launch Status: HFI Beam Expectations from the Optical Optimisation of the Focal Plane

flux ratio in comparison with the diffuse interstellar medium. We show, from the combination of the PRONAOS/SPM and IRAS data, that, inside the filament, there is no evidence for emission from the transiently heated small particles responsible for the 60xa0 μ m emission, and that the temperature of large grains in thermal equilibrium with the radiation field is reduced in the inner parts of the filament. The temperature is as low as 12.1

Calibration and first light of the Diabolo photometer at the Millimetre and Infrared Testa Grigia Observatory

^{+0.2}_{-0.1}

Image Quality Control and Alignment of a Submillimeter Balloon-Borne Segmented Telescope

xa0K with

PRONAOS submillimeter observations of the Orion clouds

beta=1.9pm 0.2

Observation of the diffuse galactic emission at 6.2 μm

(or 12.0

Submillimetric photometry of the integrated galactic emission

^{+0.2}_{-0.1}