Speckle Space–Time Covariance in High-contrast Imaging

Autor: Briley Lewis, Michael P. Fitzgerald, Rupert H. Dodkins, Kristina K. Davis, Jonathan Lin

Publikováno v: The Astronomical Journal, Vol 165, Iss 2, p 59 (2023)

We introduce a new framework for point-spread function subtraction based on the spatiotemporal variation of speckle noise in high-contrast imaging data where the sampling timescale is faster than the speckle evolution timescale. One way that space–

Externí odkaz: https://doaj.org/article/01c5efc99d864faca9478173f827145a

SCExAO and Keck Direct Imaging Discovery of a Low-Mass Companion Around the Accelerating F5 Star HIP 5319

Autor: Noah Swimmer, Thayne Currie, Sarah Steiger, G. Mirek Brandt, Timothy D. Brandt, Olivier Guyon, Masayuki Kuzuhara, Jeffrey Chilcote, Taylor Tobin, Tyler D. Groff, Julien Lozi, John I. III Bailey, Alexander B. Walter, Neelay Fruitwala, Nicholas Zobrist, Jennifer Pearl Smith, Gregoire Coiffard, Rupert Dodkins, Kristina K. Davis, Miguel Daal, Bruce Bumble, Sebastien Vievard, Nour Skaf, Vincent Deo, Nemanja Jovanovic, Frantz Martinache, Motohide Tamura, N. Jeremy Kasdin, Benjamin A. Mazin

We present the direct imaging discovery of a low-mass companion to the nearby accelerating F star, HIP 5319, using SCExAO coupled with the CHARIS, VAMPIRES, and MEC instruments in addition to Keck/NIRC2 imaging. CHARIS $JHK$ (1.1-2.4 $\mu$m) spectros

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::18f0c23da70e16c7cfe3a23d8f8d11b1
http://arxiv.org/abs/2208.00334

On-sky demonstration of stochastic speckle discrimination for companion detection with the MKID Exoplanet Camera (MEC)

Autor: Benjamin A. Mazin, Tyler D. Groff, Neelay Fruitwala, Jeffrey Chilcote, Olivier Guyon, Bruce Bumble, Vincent Deo, Isabel Lipartito, Nemanja Jovanovic, Sébastien Vievard, Jennifer Pearl Smith, Rupert Dodkins, Motohide Tamura, F. Martinache, Miguel Daal, Masayuki Kuzuhara, Sarah Steiger, Noah Swimmer, Thayne Currie, Paul Szypryt, Gregoire Coiffard, Timothy D. Brandt, John I. Bailey, Ananya Sahoo, Kristina K. Davis, Nicholas Zobrist, Seth R. Meeker, Julien Lozi, Alexander B. Walter, Clint Bockstiegel

Publikováno v: Techniques and Instrumentation for Detection of Exoplanets X.

We present an on-sky demonstration of a post-processing technique for companion detection called Stochastic Speckle Discrimination (SSD) and its ability to improve the detection of faint companions using SCExAO and the MKID Exoplanet Camera (MEC). Us

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9dcd75d1d6520f1a0057a0d1a6fe267e
https://doi.org/10.1117/12.2594872

Takotsubo Cardiomyopathy: An ST-Elevation Myocardial Infarction Mimic

Autor: Kristina A Davis

Publikováno v: Advanced emergency nursing journal. 43(1)

Takotsubo cardiomyopathy (TC), a rare syndrome often preceded by an emotional or physical trigger, which earned the nickname broken heart syndrome, was first diagnosed in 1990. Takotsubo cardiomyopathy can mimic an ST-elevation myocardial infarction

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ef2eb81001314ffb932e6f6040a01b6d
https://pubmed.ncbi.nlm.nih.gov/33952877

Status of the SCExAO instrument: recent technology upgrades and path to a system-level demonstrator for PSI

Autor: Tomoyuki Kudo, Julien Lozi, Christophe Clergeon, Olivier Guyon, Chrstian Schwab, Theodoros Anagnos, Jared R. Males, Naoshi Murakami, Motohide Tamura, B. Norris, Hideki Takami, Vincent Deo, Takayuki Kotani, Yoshito H. Ono, Ruslan Belikov, Ananya Sahoo, Eduardo Bendek, Yosuke Minowa, N. Jeremy Kasdin, Eugene Pluzhnik, Sébastien Vievard, Peter G. Tuthill, Nemanja Jovanovic, Kevin Barjot, Frantz Martinache, David S. Doelman, Sarah Steiger, Justin Knight, Nick Cvetojevic, Thayne Currie, Michael Ireland, Naruhisa Takato, Sylvestre Lacour, Romain Laugier, Taichi Uyama, Jeffrey Chilcote, Marc-Antoine Martinod, K. Miller, Frans Snik, Jun Hashimoto, Steven P. Bos, Jun Nishikawa, Hajime Kawahara, Alex B. Walter, Benjamin A. Mazin, Masayuki Kuzuhara, Tyler D. Groff, Mamadou N'Diaye, Elsa Huby, Kristina K. Davis, M. Hayashi, Neelay Fruitwala

Publikováno v: Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series, 114480N. SPIE
STARTPAGE=114480N;TITLE=Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series
Adaptive Optics Systems VII
Adaptive Optics Systems VII, Dec 2020, Online Only, United States. pp.22, ⟨10.1117/12.2562832⟩

The Subaru Coronagraphic Extreme Adaptive Optics (SCExAO) instrument is a high-contrast imaging system installed at the 8-m Subaru Telescope on Maunakea, Hawaii. Due to its unique evolving design, SCExAO is both an instrument open for use by the inte

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::333d4d9655a329ef8fb59316b9f67bfd
https://doi.org/10.1117/12.2562832