학술논문
Trans-Neptunian objects found in the first four years of the Dark Energy Survey
Document Type
Working Paper
Author
Bernardinelli, Pedro H.; Bernstein, Gary M.; Sako, Masao; Liu, Tongtian; Saunders, William R.; Khain, Tali; Lin, Hsing Wen; Gerdes, David W.; Brout, Dillon; Adams, Fred C.; Belyakov, Matthew; Somasundaram, Aditya Inada; Sharma, Lakshay; Locke, Jennifer; Franson, Kyle; Becker, Juliette C.; Napier, Kevin; Markwardt, Larissa; Annis, James; Abbott, T. M. C.; Avila, S.; Brooks, D.; Burke, D. L.; Rosell, A. Carnero; Kind, M. Carrasco; Castander, F. J.; da Costa, L. N.; De Vicente, J.; Desai, S.; Diehl, H. T.; Doel, P.; Everett, S.; Flaugher, B.; García-Bellido, J.; Gruen, D.; Gruendl, R. A.; Gschwend, J.; Gutierrez, G.; Hollowood, D. L.; James, D. J.; Johnson, M. W. G.; Johnson, M. D.; Krause, E.; Kuropatkin, N.; Maia, M. A. G.; March, M.; Miquel, R.; Paz-Chinchón, F.; Plazas, A. A.; Romer, A. K.; Rykoff, E. S.; Sánchez, C.; Sanchez, E.; Scarpine, V.; Serrano, S.; Sevilla-Noarbe, I.; Smith, M.; Sobreira, F.; Suchyta, E.; Swanson, M. E. C.; Tarle, G.; Walker, A. R.; Wester, W.; Zhang, Y.
Source
Subject
Language
Abstract
We present a catalog of 316 trans-Neptunian bodies detected by the Dark Energy Survey (DES). These objects include 245 discoveries by DES (139 not previously published) detected in $\approx 60,000$ exposures from the first four seasons of the survey ("Y4" data). The survey covers a contiguous 5000 deg$^2$ of the southern sky in the $grizY$ optical/NIR filter set, with a typical TNO in this part of the sky being targeted by $25-30$ Y4 exposures. We describe the processes for detection of transient sources and the linkage into TNO orbits, which are made challenging by the absence of the few-hour repeat observations employed by TNO-optimized surveys. We also describe the procedures for determining detection efficiencies vs. magnitude and estimating rates of false-positive linkages. This work presents all TNOs which were detected on $\ge 6$ unique nights in the Y4 data and pass a "sub-threshold confirmation" test wherein we demand the the object be detectable in a stack of the individual images in which the orbit indicates an object should be present, but was not detected. This eliminates false positives and yields TNO detections complete to $r\lesssim 23.3$ mag with virtually no dependence on orbital properties for bound TNOs at distance $30\,{\rm AU}0.3$ mag more depth, and arcs of $>4$ years for nearly all detections.
Comment: 33 pages, accepted to ApJS, table of objects found in the ancillary files
Comment: 33 pages, accepted to ApJS, table of objects found in the ancillary files