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SN 2018hna photometry & spectroscopy obs.
High-cadence ultraviolet, optical, and near-infrared photometric and low-resolution spectroscopic observations of the peculiar Type II supernova (SN) 2018hna are presented. The... -
UV-Opt LCs of ASASSN-19bt detected by TESS
We present the discovery and early evolution of ASASSN-19bt, a tidal disruption event (TDE) discovered by the All-Sky Automated Survey for Supernovae (ASAS-SN) at a distance of... -
HST UV/optical photometry in NGC 1978
Multiple stellar populations (MPs) with different chemical compositions are not exclusive features of old globular clusters (older than 10Gyr). Indeed, recent studies reveal... -
3C 454.3 FeII, MgII & 3000{AA} measurements
Over the years, the flat-spectrum radio quasar 3C454.3 has presented phases of very high activity (flares) in which the different wave bands increase their flux dramatically. In... -
Total/polarized extinction/emission PostPlanck Era
We present a synthesis of the astronomical observations constraining the wavelength-dependent extinction, emission, and polarization from interstellar dust from UV to microwave... -
Follow-up photometry of ASASSN-14ko
We present the discovery that ASASSN-14ko is a periodically flaring active galactic nucleus at the center of the galaxy ESO 253-G003. At the time of its discovery by the All-Sky... -
The GALEX-PTF experiment. II. Core-collapse SNe
The radius and surface composition of an exploding massive star, as well as the explosion energy per unit mass, can be measured using early ultraviolet (UV) observations of... -
UV and optical LCs of the TDE AT2021ehb
We present X-ray, UV, optical, and radio observations of the nearby (~78Mpc) tidal disruption event AT2021ehb/ZTF21aanxhjv during its first 430 days of evolution. AT2021ehb... -
Newly spectroscopically confirmed DB white dwarfs
Using a machine learning (ML) method, we mine DB white dwarfs (DBWDs) from the Sloan Digital Sky Survey (SDSS) Data Release (DR) 12 and DR14. The ML method consists of two... -
UV-NIR LCs of the energetic H-stripped SN2016coi
We present comprehensive observations and analysis of the energetic H-stripped SN 2016coi (a.k.a. ASASSN-16fp), spanning the {gamma}-ray through optical and radio wavelengths,... -
Cand. young OB stars from GALEX & Gaia DR2
We combine Galaxy Evolution Explorer and Gaia DR2 catalogs to track star formation in the outskirts of our Galaxy. Using photometry, proper motions, and parallaxes we identify a... -
Optical and UV follow-up of 1ES 1927+654
We study the sudden optical and ultraviolet (UV) brightening of 1ES1927+654, which until now was known as a narrow-line active galactic nucleus (AGN). 1ES 1927+654 was part of... -
Radio to UV observations of GRB 181201A
We present comprehensive multiwavelength radio to X-ray observations of GRB 181201A spanning from ~150s to ~163days after the burst, comprising the first joint ALMA-VLA-GMRT...
