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X-ray Polarization Observations of BL Lacertae
Riccardo Middei, Ioannis Liodakis, Matteo Perri +143
Blazars are a class of jet-dominated active galactic nuclei with a typical double-humped spectral energy distribution. It is of common consensus the Synchrotron emission to be resp…
On the dust of tailless Oort-cloud comet C/2020 T2 (Palomar)
Yuna Grace Kwon, Joseph R. Masiero, Johannes Markkanen
We report our new analysis of Oort-cloud comet C/2020 T2 (Palomar) (T2) observed at 2.06 au from the Sun (phase angle of 28.5 deg) about two weeks before perihelion. T2 lacks a sig…
WISE/NEOWISE Multi-Epoch Imaging of the Potentially Geminid-related Asteroids: (3200) Phaethon, 2005 UD and 1999 YC
Toshihiro Kasuga, Joseph R. Masiero
We present space-based thermal infrared observations of the presumably Geminid-associated asteroids: (3200)Phaethon, 2005 UD and 1999 YC using WISE/NEOWISE. The images were taken a…
NEOWISE Observations Of The Potentially Hazardous Asteroid (99942) Apophis
Akash Satpathy, Amy Mainzer, Joseph R. Masiero +6
Large potentially hazardous asteroids (PHAs) are capable of causing a global catastrophe in the event of a planetary collision. Thus, rapid assessment of such an object's physical…
Asteroid Polarimetric-Phase Behavior in the Near-Infrared: S- and C-Complex Objects
Joseph R. Masiero, S. Tinyanont, Maxwell A. Millar-Blanchaer
We present the first results of our survey of asteroid polarization-phase curves in the near-infrared J and H bands using the WIRC+Pol instrument on the Palomar 200-inch telescope.…
Thermal Properties of 1847 WISE-observed Asteroids
Denise Hung, Josef Hanuš, Joseph R. Masiero +1
We present new thermophysical model (TPM) fits of 1,847 asteroids, deriving thermal inertia, diameter, and Bond and visible geometric albedo. We use thermal flux measurements obtai…