Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.stsci.edu/ftp/instrument_news/GHRS/Ghrs_isr/ghrs_isr071/GHRS071_3.html
Дата изменения: Thu May 30 21:41:21 1996
Дата индексирования: Sun Dec 23 20:28:52 2007
Кодировка:
Поисковые слова: ultraviolet

Introduction

1. Introduction

As part of the Cycle 4 GHRS calibration plan a routine monitoring of the ultraviolet flux standard BD+28D4211 is performed in order to document any changes of the GHRS sensitivity. This star is one of the primary ultraviolet standards and has been monitored extensively since the beginning of Cycle 0. It is not known to be variable.

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