The influence of spot saturation on DIMM seeing measurements

Bibcode
2004SPIE.5382..656V
DOI
10.1117/12.566376
Varela, Antonia M.; Munoz-Tunon, Casiana; Vernin, Jean
Bibliographical reference

Second Backaskog Workshop on Extremely Large Telescopes. Edited by Ardeberg, Arne L.; Andersen, Torben. Proceedings of the SPIE, Volume 5382, pp. 656-660 (2004).

Advertised on:
7
2004
Number of authors
3
IAC number of authors
2
Citations
3
Refereed citations
2
Description
The DIMM is a widely accepted and often used instrument for seeing measurements. Nevertheless, its incorrect use may give rise to errors in seeing values. A detailed analysis of the parameters involved in the seeing calculation is being undertaken and the effect of saturation of the spots in particular is analyzed in this contribution. Our results reveal that the saturation increases not only the photon noise but also the speckles, which will acquire a greater relative weight with respect to the stellar spot. The result is an increase in the variance of the centroids, which results in artifically higher seeing values.
Type
Non-refereed

It may interest you

  • Non-refereed
    The Multi Frequency Instrument 2 (MFI2): mechanical design, manufacture, integration, and commissioning of the MFI2 for the QUIJOTE facility in Tenerife (Canary Islands)
    The QUIJOTE (Q-U-I JOint TEnerife) experiment combines the operation of two radio-telescopes and three instruments working in the microwave bands from 10 to 47 GHz at the Teide Observatory, Tenerife, which has already been presented in previous SPIE meetings. The new Multi Frequency Instrument (MFI2) led by the Instituto de Astrofísica de Canarias
    Lorenzo-Hernández, Haroldo et al.

    Advertised on:

    7
    2024
    Bibcode
    2024SPIE13096E..33L
    Citations
    0
  • Non-refereed
    ANDES, the high-resolution spectrograph for the ELT: RIZ & UBV spectrographs' preliminary design, analysis, and integration of the vacuum vessel and thermal enclosure
    The RIZ & UBV visible spectrographs of the ANDES instrument, which are foreseen to be installed at the Extremely Large Telescope, require to be under a very stable high vacuum and at an extremely stable temperature of 1mK to reach the radial velocity goal of 10cm/s RMS over a 10-year period. The baseline design, integration and first analyses of
    Santos Diaz, P. et al.

    Advertised on:

    7
    2024
    Bibcode
    2024SPIE13096E..4KS
    Citations
    0
  • Non-refereed
    joshspeagle/dynesty: v2.1.4
    This is bug-fix release. The main user-visible changes is that npdim= option of dynesty is removed. Also because of the code change, you will not be able to resume previous dynesty runs from earlier (
    Koposov, Sergey et al.

    Advertised on:

    6
    2024
    Bibcode
    2024zndo..12537467K
    Citations
    1