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Measuring Fiber Positioning Accuracy and Throughput with Fiber Dithering for the Dark Energy Spectroscopic Instrument

Fuente: arXiv

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Bibliographic Details
Main Authors:	Schlafly, E. F., Schlegel, D., BenZvi, S., Raichoor, A., Forero-Romero, J. E., Aguilar, J., Ahlen, S., Bailey, S., Bault, A., Brooks, D., Claybaugh, T., Dawson, K., de la Macorra, A., Dey, Arjun, Doel, P., Gaztañaga, E., Gontcho, S. Gontcho A, Guy, J., Hahn, C., Honscheid, K., Jimenez, J., Kent, S., Kirkby, D., Kisner, T., Kremin, A., Lambert, A., Landriau, M., Levi, M. E., Manera, M., Martini, P., Meisner, A., Miquel, R., Moustakas, J., Myers, A. D., Nie, J., Palanque-Delabrouille, N., Percival, W. J., Poppett, C., Prada, F., Rabinowitz, D., Rezaie, M., Rossi, G., Sanchez, E., Schubnell, M., Sharples, R., Silber, J., Tarlé, G., Weaver, B. A., Zhou, Z., Zou, H.
Format:	Preprint
Published:	2024
Subjects:	Instrumentation and Methods for Astrophysics
Online Access:	Acceder al recurso
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_version_	1866909133410664448
author	Schlafly, E. F. Schlegel, D. BenZvi, S. Raichoor, A. Forero-Romero, J. E. Aguilar, J. Ahlen, S. Bailey, S. Bault, A. Brooks, D. Claybaugh, T. Dawson, K. de la Macorra, A. Dey, Arjun Doel, P. Gaztañaga, E. Gontcho, S. Gontcho A Guy, J. Hahn, C. Honscheid, K. Jimenez, J. Kent, S. Kirkby, D. Kisner, T. Kremin, A. Lambert, A. Landriau, M. Levi, M. E. Manera, M. Martini, P. Meisner, A. Miquel, R. Moustakas, J. Myers, A. D. Nie, J. Palanque-Delabrouille, N. Percival, W. J. Poppett, C. Prada, F. Rabinowitz, D. Rezaie, M. Rossi, G. Sanchez, E. Schubnell, M. Sharples, R. Silber, J. Tarlé, G. Weaver, B. A. Zhou, Z. Zou, H.
author_facet	Schlafly, E. F. Schlegel, D. BenZvi, S. Raichoor, A. Forero-Romero, J. E. Aguilar, J. Ahlen, S. Bailey, S. Bault, A. Brooks, D. Claybaugh, T. Dawson, K. de la Macorra, A. Dey, Arjun Doel, P. Gaztañaga, E. Gontcho, S. Gontcho A Guy, J. Hahn, C. Honscheid, K. Jimenez, J. Kent, S. Kirkby, D. Kisner, T. Kremin, A. Lambert, A. Landriau, M. Levi, M. E. Manera, M. Martini, P. Meisner, A. Miquel, R. Moustakas, J. Myers, A. D. Nie, J. Palanque-Delabrouille, N. Percival, W. J. Poppett, C. Prada, F. Rabinowitz, D. Rezaie, M. Rossi, G. Sanchez, E. Schubnell, M. Sharples, R. Silber, J. Tarlé, G. Weaver, B. A. Zhou, Z. Zou, H.
contents	Highly multiplexed, fiber-fed spectroscopy is enabling surveys of millions of stars and galaxies. The performance of these surveys depends on accurately positioning fibers in the focal plane to capture target light. We describe a technique to measure the positioning accuracy of fibers by dithering fibers slightly around their ideal locations. This approach also enables measurement of the total system throughput and point spread function delivered to the focal plane. We then apply this technique to observations from the Dark Energy Survey Instrument (DESI), and demonstrate that DESI positions fibers to within 0.08" of their targets (5% of a fiber diameter) and achieves a system throughput within about 5% of expectations.
format	Preprint
id	arxiv_https___arxiv_org_abs_2403_05688
institution	arXiv
publishDate	2024
record_format	arxiv
spellingShingle	Measuring Fiber Positioning Accuracy and Throughput with Fiber Dithering for the Dark Energy Spectroscopic Instrument Schlafly, E. F. Schlegel, D. BenZvi, S. Raichoor, A. Forero-Romero, J. E. Aguilar, J. Ahlen, S. Bailey, S. Bault, A. Brooks, D. Claybaugh, T. Dawson, K. de la Macorra, A. Dey, Arjun Doel, P. Gaztañaga, E. Gontcho, S. Gontcho A Guy, J. Hahn, C. Honscheid, K. Jimenez, J. Kent, S. Kirkby, D. Kisner, T. Kremin, A. Lambert, A. Landriau, M. Levi, M. E. Manera, M. Martini, P. Meisner, A. Miquel, R. Moustakas, J. Myers, A. D. Nie, J. Palanque-Delabrouille, N. Percival, W. J. Poppett, C. Prada, F. Rabinowitz, D. Rezaie, M. Rossi, G. Sanchez, E. Schubnell, M. Sharples, R. Silber, J. Tarlé, G. Weaver, B. A. Zhou, Z. Zou, H. Instrumentation and Methods for Astrophysics Highly multiplexed, fiber-fed spectroscopy is enabling surveys of millions of stars and galaxies. The performance of these surveys depends on accurately positioning fibers in the focal plane to capture target light. We describe a technique to measure the positioning accuracy of fibers by dithering fibers slightly around their ideal locations. This approach also enables measurement of the total system throughput and point spread function delivered to the focal plane. We then apply this technique to observations from the Dark Energy Survey Instrument (DESI), and demonstrate that DESI positions fibers to within 0.08" of their targets (5% of a fiber diameter) and achieves a system throughput within about 5% of expectations.
title	Measuring Fiber Positioning Accuracy and Throughput with Fiber Dithering for the Dark Energy Spectroscopic Instrument
topic	Instrumentation and Methods for Astrophysics
url	https://arxiv.org/abs/2403.05688