Neil Pichay

SN 2021ukt: A Transitional Supernova with a Short Plateau and Persistent Interaction

Neil Pichay, Sergiy S. Vasylyev, Audrey M. Liddle, Alexei V. Filippenko et autres

We present spectroscopic and photometric observations of SN 2021ukt, a peculiar short-plateau object that was originally identified as a Type IIn supernovae (SN) and later underwent an unprecedented transition to a Type Ib (possibly Type IIb) SN. The early time light curves …

Transit Timing of the White Dwarf-cold Jupiter System WD 1856+534

Eli A. Gendreau-Distler, Kate B. Bostow, Kishore C. Patra, Efrain Alvarado et autres

Abstract We present new transit-timing measurements for the white dwarf-cold Jupiter system WD 1856+534, extending the baseline of observations from 311 epochs to 1498 epochs. The planet is unlikely to have survived the host star’s red-giant phase at its present location and …

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SN 2021ukt: A Transitional Supernova with a Short Plateau and Persistent Interaction

Neil Pichay, Sergiy S. Vasylyev, Audrey M. Liddle, Alexei V. Filippenko et autres

Abstract We present spectroscopic and photometric observations of SN 2021ukt, a peculiar short-plateau object that was originally identified as a Type IIn supernovae (SN) and later underwent an unprecedented transition to a Type Ib (possibly Type IIb) SN. The early time light …

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SN 2022joj optical and UV photometry follow-up

Chang Liu, Adam A. Miller, Samuel J. Boos, Ken J. Shen et autres

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SN 2023zcu: A Type IIP SN with Early Flash Features

Monalisa Dubey, Kuntal Misra, G. Csörnyei, Raya Dastidar et autres

Abstract We present a detailed photometric and spectroscopic analysis of the Type IIP supernova (SN) SN 2023zcu, which exploded in the galaxy NGC 2139 (redshift z = 0.006). SN 2023zcu exhibits a well-sampled light curve covering the rise, plateau, and nebular phases. …

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SN 2023zcu: A Type IIP SN with Early Flash Features

Monalisa Dubey, Kuntal Misra, G. Csörnyei, Raya Dastidar et autres

We present a detailed photometric and spectroscopic analysis of the Type IIP supernova SN~2023zcu, which exploded in the galaxy NGC~2139 (redshift $z$ = 0.006). SN~2023zcu exhibits a well-sampled light curve covering the rise, plateau, and nebular phases. It has an optically thick …

SN 2023zcu: A Type IIP SN with Early Flash Features

Monalisa Dubey, Kuntal Misra, G. Csörnyei, Raya Dastidar et autres

We present a detailed photometric and spectroscopic analysis of the Type IIP supernova SN~2023zcu, which exploded in the galaxy NGC~2139 (redshift $z$ = 0.006). SN~2023zcu exhibits a well-sampled light curve covering the rise, plateau, and nebular phases. It has an optically thick …

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SN 2023ixf in the Pinwheel Galaxy M101: From Shock Breakout to the Nebular Phase

WeiKang Zheng, Luc Dessart, A. V. Filippenko, Yi Yang et autres

Abstract We present photometric and spectroscopic observations of supernova SN 2023ixf covering from day 1 to 442 days after explosion. SN 2023ixf reached a peak V -band absolute magnitude of −18.2 ± 0.07, and light curves show that it has a relatively …

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Searching for Tidal Orbital Decay in Hot Jupiters

Efrain Alvarado, Kate B. Bostow, Kishore C. Patra, Cooper Jacobus et autres

We study transits of several ``hot Jupiter'' systems - including WASP-12 b, WASP-43 b, WASP-103 b, HAT-P-23 b, KELT-16 b, WD 1856+534 b, and WTS-2 b - with the goal of detecting tidal orbital decay and extending the baselines of transit times. …

Searching for tidal orbital decay in hot Jupiters

Efrain Alvarado, Kate B. Bostow, Kishore C. Patra, Cooper Jacobus et autres

ABSTRACT We study transits of several ‘hot Jupiter’ systems, including WASP-12 b, WASP-43 b, WASP-103 b, HAT-P-23 b, KELT-16 b, WD 1856+534 b, and WTS-2 b, with the goal of detecting tidal orbital decay and extending the baselines of transit times. We …

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SN 2022joj: A Peculiar Type Ia Supernova Possibly Driven by an Asymmetric Helium-shell Double Detonation

Chang Liu, Adam A. Miller, Samuel J. Boos, Ken J. Shen et autres

Abstract We present observations of SN 2022joj, a peculiar Type Ia supernova discovered by the Zwicky Transient Facility. SN 2022joj exhibits an unusually red g ZTF − r ZTF color at early times and a rapid blueward evolution afterward. Around maximum brightness, …

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Optical Observations of the Type Ia Supernova 2022hrs

Sophia Risin, Cooper Jacobus, Ivan Altunin, Thomas G. Brink et autres

Abstract We present optical photometry and spectra of supernova (SN) 2022hrs (distance ∼ 19 Mpc). It was classified as a Type Ia SN (SN Ia) based on its optical spectra, which exhibited high velocities in both Si ii and Ca ii absorption …

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