Astroclimate at San Pedro Mártir – I. Seeing statistics between 2004 and 2008 from the Thirty Meter Telescope site-testing data

dc.creatorEsperanza Carrasco Licea
dc.creatorAlberto Carramiñana Alonso
dc.date2012
dc.date.accessioned2023-07-25T16:24:49Z
dc.date.available2023-07-25T16:24:49Z
dc.identifierhttp://inaoe.repositorioinstitucional.mx/jspui/handle/1009/2039
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/7807221
dc.descriptionWe present comprehensive seeing statistics for the San Pedro Mártir site derived from theThirty Meter Telescope site-selection data. The observations were obtained between 2004 and2008 with a Differential Image Motion Monitor (DIMM) and a Multi-Aperture ScintillationSensor (MASS) combined instrument (MASS–DIMM). The parameters that are statisticallyanalysed here are the whole atmosphere seeing (measured by the DIMM), the free atmosphereseeing (measured by the MASS) and the ground-layer (GL) seeing, which is the differencebetween the total seeing and the free atmosphere seeing.We have made a careful data coveragestudy, along with statistical distributions of simultaneousMASS–DIMMseeingmeasurements,in order to investigate the nightly, monthly, seasonal, annual and global behaviour, as wellas possible hourly seeing trends. Although this campaign covers five years, the sampling isuneven, with 2006 and 2007 being the best sampled years in terms of seasonal coverage.The overall results yield a median seeing of 0.78 arcsec (DIMM), 0.37 arcsec (MASS) and0.59 arcsec (GL). Therefore, the strongest contribution to the whole atmosphere seeing comesfrom a strong ground layer. We find that the best season is summer, while the worst season iswinter, in accordance with previous studies. It is worth noting that the best yearly results arecorrelated with the best sampled years. The hourly analysis shows that there is no statisticallysignificant tendency for seeing degradation towards dawn. The seeing values are slightly largerthan those reported previously, which might be the result of climate changes.
dc.formatapplication/pdf
dc.languageeng
dc.publisherMonthly notices of the royal astronomical society
dc.relationcitation:Sánchez, L. J., et al., (2012), Astroclimate at San Pedro Mártir – I. Seeing statistics between 2004 and 2008 from the Thirty Meter Telescope site-testing data, Monthly notices of the royal astronomical society, V. 426(1):635–646
dc.rightsinfo:eu-repo/semantics/openAccess
dc.rightshttp://creativecommons.org/licenses/by-nc-nd/4.0
dc.subjectinfo:eu-repo/classification/Inspec/Atmospheric effects
dc.subjectinfo:eu-repo/classification/Inspec/Site testing
dc.subjectinfo:eu-repo/classification/cti/1
dc.subjectinfo:eu-repo/classification/cti/21
dc.subjectinfo:eu-repo/classification/cti/21
dc.titleAstroclimate at San Pedro Mártir – I. Seeing statistics between 2004 and 2008 from the Thirty Meter Telescope site-testing data
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:eu-repo/semantics/acceptedVersion
dc.audiencestudents
dc.audienceresearchers
dc.audiencegeneralPublic


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