Table 1
Observational details and starfinder parameters used for the star detection and photometry for each filter.
| Date | Filter | Number of | ⟨ FWHM ⟩ | σFWHM | ⟨SR⟩ | σSR | Natural seeing | starfinder | starfinder |
| frames | (mas) | (mas) | (%) | (%) | (@ 0.55 μm) | Threshold | Correlation | ||
|
|
|||||||||
| 2014 Dec. 8 | J | 17 | 145 | 15 | 3 | 1 | 0.̋55 | [5, 2] | 0.7 |
| H | 14 | 100 | 20 | 9 | 2 | 0.̋60 | [5, 3] | 0.7 | |
| Ks | 17 | 105 | 15 | 14 | 3 | 0.̋55 | [5, 4, 2] | 0.75 | |
Notes. The quoted full width half maximum (FWHM) and Strehl ratio (SR) of the point-spread functions (and their corresponding standard deviations) are the means from measurements of over 200 stars uniformly distributed over the field, from all the individual frames. The exposure time for each image was 80 s. The two/three values given for the starfinder threshold mean that the algorithm does two/three iterations, with a relative threshold at N-sigma each.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.