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6 papers · 2 filters
High-precision astrometry with VVV. I. An independent reduction pipeline for VIRCAM@VISTA
M. Libralato, A. Bellini, L. R. Bedin +6
We present a new reduction pipeline for the VIRCAM@VISTA detector and describe the method developed to obtain high-precision astrometry with the VISTA Variables in the Vía Láctea (…
Calibrating and Stabilizing Spectropolarimeters with Charge Shuffling and Daytime Sky Measurements
David Harrington, J. R. Kuhn, Rebecca Nevin
Well-calibrated spectropolarimetry studies at resolutions of 10,000 with signal-to-noise ratios (SNRs) better than 0.01\% across individual line profiles, are becoming common w…
Machine learning for transient discovery in Pan-STARRS1 difference imaging
D. E. Wright, S. J. Smartt, K. W. Smith +15
Efficient identification and follow-up of astronomical transients is hindered by the need for humans to manually select promising candidates from data streams that contain many fal…
Learning from FITS: Limitations in use in modern astronomical research
Brian Thomas, Tim Jenness, Frossie Economou +35
The Flexible Image Transport System (FITS) standard has been a great boon to astronomy, allowing observatories, scientists and the public to exchange astronomical information easil…
A Calibration of NICMOS Camera 2 for Low Count-Rates
D. Rubin, G. Aldering, R. Amanullah +20
NICMOS 2 observations are crucial for constraining distances to most of the existing sample of z > 1 SNe Ia. Unlike the conventional calibration programs, these observations involv…
Selection of Burst-like Transients and Stochastic Variables Using Multi-Band Image Differencing in the Pan-STARRS1 Medium-Deep Survey
S. Kumar, S. Gezari, S. Heinis +24
We present a novel method for the light-curve characterization of Pan-STARRS1 Medium Deep Survey (PS1 MDS) extragalactic sources into stochastic variables (SV) and burst-like (BL)…