The Dark Energy Bedrock All-Sky Supernova Program: Motivation, Design, Implementation, and Preliminary Data Release
Year: 2025
Type: preprint
Abstract: Precise measurements of Type Ia supernovae (SNe Ia) at low redshifts ($z$) serve as one of the most viable keys to unlocking our understanding of cosmic expansion, isotropy, and growth of structure. The Dark Energy Bedrock All-Sky Supernovae (DEBASS) program will deliver the largest uniformly calibrated low-$z$ SN Ia data set in the southern hemisphere to date. DEBASS utilizes the Dark Energy Camera to image supernovae in conjunction with the Wide-Field Spectrograph (WiFeS) to gather comprehensive host galaxy information. By using the same photometric instrument as both the Dark Energy Survey (DES) and the DECam Local Volume Exploration Survey, DEBASS not only benefits from a robust photometric pipeline and well-calibrated images across the southern sky, but can replace the historic and external low-$z$ samples that were used in the final DES supernova analysis. DEBASS has accumulated more than 400 spectroscopically confirmed SNe Ia in the redshift range of $0.01
Source: arXiv (Cornell University)
Authors: Sherman, Nora F., Acevedo, Maria, Brout, Dillon, Martin, Bailey, Scolnic, Daniel, Cao, Dingyuan, Lidman, Christopher, Ali, Noor, Armstrong, Patrick, Auchett, K., Chen, Rebecca C., Drlica-Wagner, Alex, Ferguson, Peter S., Herner, Kenneth, Narayan, Gautham, Peterson, Erik R., Rauf, Liana, Rest, Armin, Riess, Adam G., Sako, Masao, Schmidt, Brian, Tang, Xianzhe TZ, Tucker, Brad E.
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W6910742008
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