924 citations · 3.6k across the 44 of their papers we have counts for
7 papers · 1 filter
A novel variability-based method for quasar selection: evidence for a rest frame ~54 day characteristic timescale
Matthew J. Graham, S. G. Djorgovski, Andrew J. Drake +5
We compare quasar selection techniques based on their optical variability using data from the Catalina Real-time Transient Survey (CRTS). We introduce a new technique based on Slep…
Feature Selection Strategies for Classifying High Dimensional Astronomical Data Sets
Ciro Donalek, Arun Kumar A., S. G. Djorgovski +7
The amount of collected data in many scientific fields is increasing, all of them requiring a common task: extract knowledge from massive, multi parametric data sets, as rapidly an…
A comparison of period finding algorithms
Matthew J. Graham, Andrew J. Drake, S. G. Djorgovski +4
This paper presents a comparison of popular period finding algorithms applied to the light curves of variable stars from the Catalina Real-time Transient Survey (CRTS), MACHO and A…
Using conditional entropy to identify periodicity
Matthew J. Graham, Andrew J. Drake, S. G. Djorgovski +2
This paper presents a new period finding method based on conditional entropy that is both efficient and accurate. We demonstrate its applicability on simulated and real data. We fi…
Machine-assisted discovery of relationships in astronomy
Matthew J. Graham, S. G. Djorgovski, Ashish A. Mahabal +2
High-volume feature-rich data sets are becoming the bread-and-butter of 21st century astronomy but present significant challenges to scientific discovery. In particular, identifyin…
The MICA Experiment: Astrophysics in Virtual Worlds
S. G. Djorgovski, Piet Hut, Rob Knop +9
We describe the work of the Meta-Institute for Computational Astrophysics (MICA), the first professional scientific organization based in virtual worlds. MICA was an experiment in…
Evidence for a Milky Way Tidal Stream Reaching Beyond 100 kpc
A. J. Drake, M. Catelan, S. G. Djorgovski +9
We present the analysis of 1,207 RR Lyrae found in photometry taken by the Catalina Survey's Mount Lemmon telescope. By combining accurate distances for these stars with measuremen…