Using clustering for disperse objects fields segmentation in MIRADAS instrument

Josep Sabater; Santiago Torres; Francisco Garzón; José María Gómez

doi:10.1117/12.2312528

6 July 2018 Using clustering for disperse objects fields segmentation in MIRADAS instrument

Josep Sabater, Santiago Torres, Francisco Garzón, José María Gómez

Proceedings Volume 10707, Software and Cyberinfrastructure for Astronomy V; 107070N (2018) https://doi.org/10.1117/12.2312528
Event: SPIE Astronomical Telescopes + Instrumentation, 2018, Austin, Texas, United States

Abstract

Mid-resolution InfRAreD Astronomical Spectrograph (MIRADAS), a near-infrared multi-object spectrograph for Gran Telescopio Canarias (GTC), has 12 deployable optomechanical Integral Field Units (IFU). Based on a robotic probe arm with a pick-off mirror, each of these units can observe a different user-defined sky object. MIRADAS can work with target sets where their components are spread over such a wide area so that all of them do not fit in the field-of-view of the instrument. Therefore, data sets of that kind require, prior to capturing them, some arrangement that groups its elements in different subsets where the distance between the two most remote elements is inferior to the field-of-view diameter. This field segmentation is achieved using a hierarchical clustering technique. Our method relies on determining mutual nearest-neighbors, which will be merged if they show a given degree of similarity known beforehand. Moreover, we also compute a geometric center for these clusters, information to be delivered to the telescope’s pointing process. This step is formulated as the minimum bounding disk problem, which founds the center of the smallest radius circle enclosing all points of a cluster. Finally, we consider several real science cases and analyze the performance of the proposed solution.

Conference Presentation

Citation Download Citation

Josep Sabater, Santiago Torres, Francisco Garzón, and José María Gómez "Using clustering for disperse objects fields segmentation in MIRADAS instrument", Proc. SPIE 10707, Software and Cyberinfrastructure for Astronomy V, 107070N (6 July 2018); https://doi.org/10.1117/12.2312528

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available