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New chart for V475 Sct and some clarifications on GZ Sct I've made a deeper chart for V475 Sct based on Arne Henden's photometry and ASAS-3 data. http://ar.geocities.com/varsao/Carta_V475_Sct_tel2.htm While looking at Arne's photometry file, I've found that there is a bright star near the position of GZ Sct, listed in the GCVS as a mira with a photographic range 13.5 - <16.5 GCVS position is: 18 49 51.9 -09 39 24 The star is probably GZ Sct itself lying some arcseconds off from the published position. However, there is a 13th magnitude red star -that might even be constant according to ASAS-3 data- that better matches the position in the GCVS so it could e a matter of confussion.: 18 49 51.277 -09 39 22.55 (GSC2.2) GZ Scuti is actually GSC 5697 1462 at 18 49 51.248 -09 39 29.66 (GSC2.2). It's very interesting to note that this star has experienced a very fast bightening for a mira with a 570 days period, as can be seen from its ASAS-3 lightcurve: http://vsnet.astrouw.edu.pl/cgi-asas/asas_variable/184951-0940.0,asas3,0,500,0,0 During 900 days, the star was fainter than 14th magnitude and the only star of the pair that was measure was the 13.1 mag. star 8" North. On August 10, it became visible. Here is a table to show the facts: JD -2450000 V mag of blend V mag alone 2853.74969 13.11 ?? 2861.59687 12.57 13.65 2862.72411 12.49 13.42 2866.72476 11.90 12.34 2872.57130 11.45 11.73 and in Arne's file it is at V= 10.93 witha B-V of 2.02. It deserves further monitoring because no ASAS-3 data have been taken ever since. Maybe the previous maxima took place during Sun conjunction? Maybe a faint maximum a couple of years ago? Maybe a very large amplitude variable that shows rapid changes at the rising branch. Regards, Sebastian.
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