Data from the precision solar photometric telescope (pspt) in hawaii from march 1998 to march 1999

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{{#vardefine:authoreditor|Oran R. White, Peter A. Fox, Randy Meisner, Mark P. Rast, Eric Yasukawa, Darryl Koon, Crystal Rice, Haosheng Lin, Jeff Kuhn and Roy Coulter}}

Reference: {{#vardefine:pagename|data from the precision solar photometric telescope (pspt) in hawaii from march 1998 to march 1999 }}

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{{#vardefine:pagename|Data from the precision solar photometric telescope (pspt) in hawaii from march 1998 to march 1999 }}{{#vardefine:key| }}

abstract: Two Precision Solar Photometric Telescopes (PSPT) designed and built at the U.S. National Solar Observatory (NSO) are in operation in Rome and Hawaii. A third PSPT is now in operation the NSO at Sunspot, NM. The PSPT system records full disk solar images at three wavelengths: K line at 393.3 nm and two continua at 409 nm and 607 nm throughout the observing day. We currently study properties of limb darkening, sunspots, and network in these images with particular emphasis on data taken in July and September 1998. During this period, the number of observations per month was high enough to show directional properties of the radiation field surrounding sunspots. We show examples of our PSPT images and describe our study of bright rings around sunspots.

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