activity
19982025
most citedThe Seventh Data Release of the Sloan Digital Sky Survey

5.4k citations · 30.7k across the 148 of their papers we have counts for

collaborators

151 papers

astro-ph.SR2025

Radio and Optical Flares on the dMe Flare Star EV Lac

Rachel A. Osten, Adam F. Kowalski, Suzanne Hawley +4

We present the results of a coordinated campaign to observe radio and optical stellar flares from the nearby M dwarf flare star EV~Lac. From a total of 27 hours of radio and 29 hou…

astro-ph.IM2025

Automated Spectroscopic Wavelength Calibration using Dynamic Time Warping

James R. A. Davenport, Francisca Chabour Barra, K. Azalee Bostroem +14

Here we present an automated method for obtaining wavelength calibrations for one-dimensional spectra, using Dynamic Time Warping (DTW). DTW is a flexible and well-understood algor…

astro-ph.SR2023★ 41 cited

APO & SMARTS flare star campaign observations I. Blue wing asymmetries in chromospheric lines during mid M dwarf flares from simultaneous spectroscopic and photometric observation data

Yuta Notsu, Adam F. Kowalski, Hiroyuki Maehara +12

We conducted the time-resolved simultaneous optical spectroscopic and photometric observations of mid M dwarf flare stars YZ CMi, EV Lac, and AD Leo. Spectroscopic observations wer…

astro-ph.EP2023

TOI-2015b: A Warm Neptune with Transit Timing Variations Orbiting an Active mid M Dwarf

Sinclaire E. Jones, Gudmundur Stefansson, Kento Masuda +29

We report the discovery of a close-in () warm Neptune with clear transit timing variations (TTVs) orbiting the nearby ($d=47.3\:\mathrm{pc}…

astro-ph.HE2023★ 90 cited

Early Spectroscopy and Dense Circumstellar Medium Interaction in SN 2023ixf

K. Azalee Bostroem, Jeniveve Pearson, Manisha Shrestha +53

We present the optical spectroscopic evolution of SN~2023ixf seen in sub-night cadence spectra from 1.18 to 14 days after explosion. We identify high-ionization emission features,…

astro-ph.EP2022★ 15 cited

NEID Reveals that The Young Warm Neptune TOI-2076 b Has a Low Obliquity

Robert C. Frazier, Gudmundur Stefansson, Suvrath Mahadevan +27

TOI-2076 b is a sub-Neptune-sized planet () that transits a young () bright () K-dwarf hosting a system of three transiting…