123 citations · 1.5k across the 40 of their papers we have counts for
14 papers · 1 filter
Observations of the luminous red nova AT 2021biy in the nearby galaxy NGC 4631
Y. -Z. Cai, A. Pastorello, M. Fraser +73
We present an observational study of the luminous red nova (LRN) AT\,2021biy in the nearby galaxy NGC\,4631. The field of the object was routinely imaged during the pre-eruptive st…
The "Giraffe": Discovery of a stripped red giant in an interacting binary with a lower giant
T. Jayasinghe, Todd A. Thompson, C. S. Kochanek +13
We report the discovery of a stripped giant + lower giant binary, 2M04123153+6738486 (2M0412), identified during a search for non-interacting compact object-star binaries. 2M0412 i…
Discovery of a Highly Eccentric, Chromospherically Active Binary: ASASSN-V J192114.84+624950.8
Zachary S. Way, T. Jayasinghe, C. S. Kochanek +5
As part of an All-Sky Automated Survey for SuperNovae (ASAS-SN) search for sources with large flux decrements, we discovered a transient where the quiescent, stellar source, ASASSN…
The 2019 outburst of the 2005 classical nova V1047 Cen: a record breaking dwarf nova outburst or a new phenomenon?
E. Aydi, K. V. Sokolovsky, J. S. Bright +28
We present a detailed study of the 2019 outburst of the cataclysmic variable V1047~Cen, which hosted a classical nova eruption in 2005. The peculiar outburst occurred 14 years afte…
The Loudest Stellar Heartbeat: Characterizing the most extreme amplitude heartbeat star system
T. Jayasinghe, C. S. Kochanek, J. Strader +16
We characterize the extreme heartbeat star system MACHO 80.7443.1718 in the LMC using TESS photometry and spectroscopic observations from the Magellan Inamori Kyocera Echelle (MIKE…
A Unicorn in Monoceros: the dark companion to the bright, nearby red giant V723 Mon is a non-interacting, mass-gap black hole candidate
T. Jayasinghe, K. Z. Stanek, Todd A. Thompson +18
We report the discovery of the closest known black hole candidate as a binary companion to V723 Mon. V723 Mon is a nearby (), bright (~mag), evolved (…
The ASAS-SN Catalog of Variable Stars VIII: "Dipper" Stars in the Lupus Star-Forming Region
J. W. Bredall, B. J. Shappee, E. Gaidos +9
Some young stellar objects such as T Tauri-like "dipper" stars vary due to transient partial occultation by circumstellar dust, and observations of this phenomenon inform us of con…
The shape of SN 1993J re-analyzed
H. F. Stevance, D. Baade, J. R. Bruten +8
SN 1993J is one of the best studied Type IIb supernovae. Spectropolarimetric data analyses were published over two decades ago at a time when the field of supernova spectropolarime…
The ASAS-SN Catalog of Variable Stars VI: An All-Sky Sample of Scuti Stars
T. Jayasinghe, K. Z. Stanek, C. S. Kochanek +10
We characterize an all-sky catalog of Scuti variables in ASAS-SN, which includes new discoveries. Using distances from \textit{Gaia} DR2, we deriv…
The New EXor Outburst of ESO-H-alpha~99 observed by Gaia ATLAS and TESS
Klaus W. Hodapp, Bo Reipurth, Bertil Pettersson +11
We report photometry and spectroscopy of the outburst of the young stellar object ESO-Halpha 99. The outburst was first noticed in Gaia alert Gaia18dvc and later by ATLAS. We have…
Early Time Light Curves of Type Ia Supernovae Observed with TESS
M. M. Fausnaugh, P. J. Vallely, C. S. Kochanek +18
We present early time light curves of Type Ia supernovae observed in the first six sectors of TESS data. Ten of these supernovae were discovered by ASAS-SN, seven by ATLAS, six by…
Photometric and Spectroscopic Properties of Type Ia Supernova 2018oh with Early Excess Emission from the 2 Observations
W. Li, X. Wang, J. Vinkó +160
Supernova (SN) 2018oh (ASASSN-18bt) is the first spectroscopically-confirmed type Ia supernova (SN Ia) observed in the field. The data revealed an excess emission…
Supernova 2014J at M82: II. Direct Analysis of Spectra Obtained with Isaac Newton and William Herschel Telescopes
Patrick Vallely, M. E. Moreno-Raya, E. Baron +19
We analyze a time series of optical spectra of SN~2014J from almost two weeks prior to maximum to nearly four months after maximum. We perform our analysis using the SYNOW code, wh…
SN 2014J at M82: I. A middle-class type Ia supernova by all spectroscopic metrics
L. Galbany, M. E. Moreno-Raya, P. Ruiz-Lapuente +20
We present the intensive spectroscopic follow up of the type Ia supernova (SN Ia) 2014J in the starburst galaxy M82. Twenty-seven optical spectra have been acquired from January 22…