SANEPIC: A Mapmaking Method for Time Stream Data from Large Arrays

doi:10.1086/588543

The Astrophysical Journal

Quick search Find article

Quick search

All journals This journal only

Find article
Volume number: Issue number (if known): Article or page number:

The Astrophysical Journal Volume 681 Number 1 Create an alert RSS this journal

G. Patanchon et al. 2008 ApJ 681 708 doi:10.1086/588543

SANEPIC: A Mapmaking Method for Time Stream Data from Large Arrays

FREE ISSUE

G. Patanchon^1,2, P. A. R. Ade³, J. J. Bock^4,5, E. L. Chapin¹, M. J. Devlin⁶, S. Dicker⁶, M. Griffin³, J. O. Gundersen⁷, M. Halpern¹, P. C. Hargrave³, D. H. Hughes⁸, J. Klein⁶, G. Marsden¹, P. G. Martin^9,10, P. Mauskopf³, C. B. Netterfield^10,11, L. Olmi^12,13, E. Pascale¹¹, M. Rex⁶, D. Scott¹, C. Semisch⁶, M. D. P. Truch¹⁴, C. Tucker³, G. S. Tucker¹⁴, M. P. Viero¹⁰ and D. V. Wiebe¹¹

Show affiliations

patanchon@apc.univ-paris7.fr

¹ Department of Physics and Astronomy, University of British Columbia, Vancouver, BC V6T 1Z1, Canada
² Laboratoire APC, 75205 Paris, France
³ Department of Physics and Astronomy, Cardiff University, Cardiff CF24 3AA, UK
⁴ Jet Propulsion Laboratory, Pasadena, CA 91109-8099
⁵ Observational Cosmology, MS 59-33, California Institute of Technology, Pasadena, CA 91125
⁶ Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA 19104
⁷ Department of Physics, University of Miami, Carol Gables, FL 33146
⁸ Instituto Nacional de Astrofísica Óptica y Electrónica (INAOE), 72000 Puebla, Mexico
⁹ Canadian Institute for Theoretical Astrophysics, University of Toronto, Toronto, ON M5S 3H8, Canada
¹⁰ Department of Astronomy and Astrophysics, University of Toronto, Toronto, ON M5S 3H4, Canada
¹¹ Department of Physics, University of Toronto, Toronto, ON M5S 1A7, Canada
¹² Istituto di Radioastronomia, I-50125 Florence, Italy
¹³ Physics Department, University of Puerto Rico, Rio Piedras Campus, San Juan, PR 00931
¹⁴ Department of Physics, Brown University, Providence, RI 02912

Tag this article Full text PDF (600 KB) View as HTML

Abstract References Cited By

We describe a mapmaking method that we have developed for the Balloon-borne Large Aperture Submillimeter Telescope (BLAST) experiment, but which should have general application to data from other submillimeter arrays. Our method uses a maximum likelihood-based approach, with several approximations, which allows images to be constructed using large amounts of data with fairly modest computer memory and processing requirements. This new approach, Signal and Noise Estimation Procedure Including Correlations (SANEPIC), builds on several previous methods but focuses specifically on the regime where there are a large number of detectors sampling the same map of the sky, and explicitly allowing for the possibility of strong correlations between the detector time streams. We provide real and simulated examples of how well this method performs compared with more simplistic mapmakers based on filtering. We discuss two separate implementations of SANEPIC: a brute-force approach, in which the inverse pixel-pixel covariance matrix is computed, and an iterative approach, which is much more efficient for large maps. SANEPIC has been successfully used to produce maps using data from the 2005 BLAST flight.

Your last 10 viewed

SANEPIC: A Mapmaking Method for Time Stream Data from Large Arrays
G. Patanchon et al. 2008 ApJ 681 708
Classical simulations of the properties of group-III nitrides
J A Chisholm et al 1999 J. Phys.: Condens. Matter 11 L235
A measure of data collapse for scaling
Somendra M Bhattacharjee and Flavio Seno 2001 J. Phys. A: Math. Gen. 34 6375
Chandra X-Ray Observation of the Orion Nebula Cluster. II. Relationship between X-Ray Activity Indicators and Stellar Parameters
E. Flaccomio et al. 2003 ApJ 582 398
Vanishing scalar invariant spacetimes in higher dimensions
A Coley et al 2004 Class. Quantum Grav. 21 5519
A crisis in the dissipative Fermi accelerator model
Edson D Leonel and P V E McClintock 2005 J. Phys. A: Math. Gen. 38 L425
Band gaps and asymptotic behaviour of continued fraction coefficients
P Turchi et al 1982 J. Phys. C: Solid State Phys. 15 2891
Submillimeter Array 12CO (J = 3-2) Interferometric Observations of the Central Region of M51
Satoki Matsushita et al 2004 ApJ 616 L55
Interactively variable isotropic resolution in computed tomography
Robert M Lapp et al 2008 Phys. Med. Biol. 53 2693
Isotopic quantum effects on the structure of low density amorphous ice
J Urquidi et al 2003 J. Phys.: Condens. Matter 15 3657

Users also read

What's this?

This innovative new feature generates a list of articles 'also read' by other users based on them reading the original article. Article abstracts citations and references are all considered and weighted accordingly. We hope that this will help you find relevant papers for your research.

IOPscience

The Astrophysical Journal

The Astrophysical Journal

SANEPIC: A Mapmaking Method for Time Stream Data from Large Arrays

Users also read

Share

View by subject

Export