JADES Dark Horse: demonstrating high-multiplex observations with JWST/NIRSpec dense-shutter spectroscopy in the JADES Origins Field
Authors
Francesco D'Eugenio
Erica J. Nelson
Daniel J. Eisenstein
Roberto Maiolino
Stefano Carniani
Jan Scholtz
Mirko Curti
Christopher N. A. Willmer
Andrew J. Bunker
Jakob M. Helton
Ignas Juodžbalis
Fengwu Sun
Sandro Tacchella
Santiago Arribas
Alex J. Cameron
Stéphane Charlot
Emma Curtis-Lake
Kevin Hainline
Benjamin D. Johnson
Brant Robertson
Christina C. Williams
Chris Willott
William M. Baker
Jacopo Chevallard
A. Lola Danhaive
Yuki Isobe
Xihan Ji
Zhiyuan Ji
Gareth C. Jones
Nimisha Kumari
Tobias J. Looser
Jianwei Lyu
Eleonora Parlanti
Michele Perna
Dávid Puskás
Pierluigi Rinaldi
Charlotte Simmonds
Yang Sun
Giacomo Venturi
Joris Witstok
Zihao Wu
Yongda Zhu
Abstract
We present JWST/NIRSpec dense-shutter spectroscopy (DSS). This novel observing strategy with the NIRSpec micro-shutter assembly (MSA) deliberately permits a high number of controlled spectral overlaps to reach extreme multiplex while retaining the low background of slit spectroscopy. In a single configuration over the JADES Origins Field we opened shutters on all faint (F444W<30 mag) z$_{\rm phot}$>3 candidates in the MSA, prioritising emission-line science and rejecting only bright continuum sources. Using 33.6 and 35.8 ks on-source in G235M and G395M, we observed a single mask with ~850 sources, obtaining secure spectroscopic redshifts for ~540 galaxies over 2.5
