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Serendipitous Nebular-phase JWST Imaging of SN Ia 2021aefx: Testing the Confinement of 56-Co Decay Energy
Ness Mayker Chen, Michael A. Tucker, Nils Hoyer +29
We present new 0.3-21 micron photometry of SN 2021aefx in the spiral galaxy NGC 1566 at +357 days after B-band maximum, including the first detection of any SN Ia at >15 micron. Th…
The Pan-STARRS1 z>5.6 quasar survey II: Discovery of 55 Quasars at 5.6<z<6.5
Eduardo Banados, Jan-Torge Schindler, Bram P. Venemans +20
The identification of bright quasars at z>6 enables detailed studies of supermassive black holes, massive galaxies, structure formation, and the state of the intergalactic medium w…
Examining the Properties of Low-Luminosity Hosts of Type Ia Supernovae from ASAS-SN
Thomas W. -S. Holoien, Vera L. Berger, Jason T. Hinkle +14
We present a spectroscopic analysis of 44 low-luminosity host galaxies of Type Ia supernovae (SNe Ia) detected by the All-Sky Automated Survey for Supernovae (ASAS-SN), using the e…
Discovery of two quasars at from the OGLE Survey
Szymon Kozłowski, Eduardo Bañados, A. Udalski +16
We have used deep Optical Gravitational Lensing Experiment (OGLE-IV) images ( mag, mag at ) of the Magellanic System, encompassing an area of $\s…
Reverberation Mapping of Luminous Quasars at High-z
Paulina Lira, Shai Kaspi, Hagai Netzer +6
We present Reverberation Mapping (RM) results for 17 high-redshift, high-luminosity quasars with good quality R-band and emission line light curves. We are able to measure statisti…
The Old Host-Galaxy Environment of SSS17a, the First Electromagnetic Counterpart to a Gravitational Wave Source
Y. -C. Pan, C. D. Kilpatrick, J. D. Simon +16
We present an analysis of the host-galaxy environment of Swope Supernova Survey 2017a (SSS17a), the discovery of an electromagnetic counterpart to a gravitational wave source, GW17…
A Comprehensive Archival Search for Counterparts to Ultra-Compact High Velocity Clouds: Five Local Volume Dwarf Galaxies
D. J. Sand, D. Crnojević, P. Bennet +17
We report five Local Volume dwarf galaxies (two of which are presented here for the first time) uncovered during a comprehensive archival search for optical counterparts to ultra-c…
Discovery of Dramatic Optical Variability in SDSS J1100+4421: A Peculiar Radio-Loud Narrow-Line Seyfert 1 Galaxy?
Masaomi Tanaka, Tomoki Morokuma, Ryosuke Itoh +55
We present our discovery of dramatic variability in SDSS J1100+4421 by the high-cadence transient survey Kiso Supernova Survey (KISS). The source brightened in the optical by at le…
The Galactic O-Star Spectroscopic Survey (GOSSS). II. Bright Southern Stars
A. Sota, J. Maíz Apellániz, N. I. Morrell +5
We present the second installment of GOSSS, a massive spectroscopic survey of Galactic O stars, based on new homogeneous, high signal-to-noise ratio, R ~ 2500 digital observations…
The Absolute Magnitude of RRc Variables From Statistical Parallax
Juna A. Kollmeier, Dorota M. Szczygiel, Christopher R. Burns +12
We present the first definitive measurement of the absolute magnitude of RR Lyrae c-type variable stars (RRc) determined purely from statistical parallax. We use a sample of 247 RR…
Bibliographic compilation of NIR spectroscopy for stars in the Galactic O-Star Catalog
Simón Torres Robledo, Rodolfo Barbá, Julia Arias +1
We are carrying out a bibliographic compilation of near-infrared (NIR)(0.7-5.0 um) spectroscopic studies available for stars in the Galactic O Star Catalog (GOSC, Maíz Apellániz et…
Two O2 If*/WN6 stars possibly ejected from the massive young Galactic cluster Westerlund 2
A. Roman-Lopes, R. H. Barba, N. I. Morrell
In this paper we report the identification of two new Galactic O2 If*/WN6 stars (WR20aa and WR20c), in the outskirt of the massive young stellar cluster Westerlund 2. The morpholog…
Science with the Galactic O-Star Spectroscopic Survey (GOSSS) : The relationship between DIBs, ISM, and extinction
Miguel Penadés Ordaz, Jesús Maíz Apellániz, Alfredo Sota Ballano +6
In this poster we show our preliminary analysis of DIBs (Diffuse Interstellar Bands) and other interstellar absorption lines with the purpose of understanding their origin and thei…