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ExoMars Flush Air Data System: Entry Simulation and Atmospheric Reconstruction Method
Schleutker, Thorn; Gülhan, Ali; Karatekin, Özgür +1 more
Imaging and Analysis of Neon Nova V382 Vel Shell
Takeda, Larissa; Diaz, Marcos
We present the detection and imaging of the spatially resolved shell of nova V382 Vel with SOAR adaptive optics module (SAM). The shell was observed in narrow-band filters Hα and [O III] 5007 Å revealing different structures in each filter. The shell’s angular diameter obtained was 9.9 arcsec, equivalent to 2.8 × 1017 cm, using the dist…
Large-scale, sub-tropical cloud activity near Titan's 1995 equinox
Lorenz, R. D.; Caldwell, J. J.; Lemmon, M. T. +1 more
We report observations of Titan using 190 images from the Hubble Space Telescope WFPC2 and NICMOS over 4 oppositions of Titan 1994-1997. Analysis of these images yields maps of surface brightness at 0.67, 0.94, and 1.08 µm that compare well with Cassini data, plus some transient features that are interpreted as large cloud systems. These sys…
AREAcat: A Tool to Compute Area Coverage of GALEX UV GUVcat and BCScat, SDSS, PanSTARRS, and Gaia Source Catalogs in Chosen Sky Regions
de la Vega, Alexander; Bianchi, Luciana; Shiao, Bernie +1 more
We present AREAcat, an interactive online tool to compute the area mapped by recent catalogs that cover most of the sky, but not contiguously, such as the Galaxy Evolution Explorer (GALEX) ultraviolet (UV) source catalogs GUVcat_AIS. Constructed from ≲600 million measurements by removing duplicate measurements of the same source in repeated observ…
An orbit-based remote sensing geological assessment of the CanMars Mars Sample Return Analogue Deployment (MSRAD) landing site situated in the Henry Mountains Basin, near Hanksville, Utah
Tornabene, Livio L.; Battler, Melissa; Choe, Byung-Hun +1 more
Mars-analogous and relevant terrestrial- and orbit-based remote sensing datasets were gathered and used for both an in and out of simulation geological assessment of a pre-selected "landing site" for the CanMars, Mars Sample Return Analogue Deployment (MSRAD), and Mars Utah Rover Field Investigation (MURFI) analogue missions. The analogue mission …
AKARI and IRAS: From beam corrections to SEDs
Pearson, Chris; Clements, David L.; Wang, Lingyu +6 more
There is significant scientific value to be gained from combining AKARI fluxes with data at other far-infrared (IR) wavelengths from the Infrared Astronomical Satellite (IRAS) and Herschel missions. To be able to do this we must ensure that there are no systematic differences between the data sets that need to be corrected before the fluxes are co…
A catalog of spectroscopic binary candidate stars derived from a comparison of Gaia DR2 with other radial velocity catalogs
Jack, Dennis
Using the recently published Gaia second data release that includes measurements of the mean radial velocity of about 7.2 million stars, we performed a systematic comparison with other existing radial velocity catalogs to search for variations in the radial velocity measurements, with the goal that detected differences may indicate that these star…
High-resolution spectroscopy of Boyajian's star during optical dimming events
Simón-Díaz, S.; Collier Cameron, A.; González Hernández, J. I. +13 more
Boyajian's star is an apparently normal main-sequence F-type star with a very unusual light curve. The dipping activity of the star, discovered during the Kepler mission, presents deep, asymmetric, and aperiodic events. Here we present high-resolution spectroscopic follow-up during some dimming events recorded post-Kepler observations, from ground…
MegaPipe 2.0: 10000 Square Degrees of CFHT MegaCam Imaging
Gwyn, Stephen
MegaPipe, the MegaCam data processing pipeline at the CADC, has been upgraded to version 2.0 and has processed over 10000 square degrees of the sky. MegaPipe has been operating since 2008. It was originally intended to increase the usage of archival MegaCam data by calibrating and stacking the images as they became public. That focus expanded to i…
OGLE-2015-BLG-1649Lb: A Gas Giant Planet around a Low-mass Dwarf
Bennett, D. P.; Soszyński, I.; Udalski, A. +70 more
We report the discovery of an exoplanet from the analysis of the gravitational microlensing event OGLE-2015-BLG-1649 that challenges the core accretion model of planet formation and appears to support the disk instability model. The planet/host-star mass ratio is q = 7.2 × 10-3 and the projected separation normalized to the angular Eins…