Variability of the solar luminosity during cycles 23 and 24

Luis Eduardo A Vieira, INPE National Institute for Space Research, Space Geophysics Division, Sao Jose dos Campos, Brazil, Alisson Dal Lago, INPE National Institute for Space Research, Sao Jose dos Campos, Brazil and Ligia Alves Da Silva, Inst Nac Pesquisas Espaciais, Sao José dos Campos, Brazil