Affiliation
American Association of Variable Star Observers (AAVSO)
Tue, 10/23/2012 - 13:37
Hello,
a newbie question about DY Vul: what does "p" magnitude code means?
I ask this because the chart (8643KO) says Magn. 8.4-9.7p , but my observations, and even the light curve from LPG, shows higher magnitudes than 8.4 so I wondered why. Maybe because these mags are not v ?
thanks
Massimo (BGMB)
Massimo - When a "p" follows the listed magnitude range of a variable on one of our charts (or in any catalog) it indicates the variable's range as photographic, which is decidedly bluer than in visual light. Thus, if the variable is a reddish star, like Mira types, SR, or many irregulars are, the visual range will be brighter than that indicated by the "p" range.
J.Bortle (BRJ)