English: Hereford Arizona Observatory photometry observations of KIC 8462852 between 2 May and 4 October 2017.
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KIC8462852 Hereford Arizona Observatory Photometry Observations Bruce Gary, Last updated: Last updated: 2017.10.04, 19 UT
NOTE: (Drbogdan (discussió) 15:58, 4 October 2017 (UTC)) =>
Also see newly created "Hereford Arizona Observatory (HAO)" article - as well as - the
original HAO WebSite.
"The current 0.3 % dip has completely recovered."[1]
"The [earlier] September fade event has recovered. It lasted from Sep 5.5 UT to Sep 16 UT, and reaching a depth of ~ 2.3 %."[2] - as/of 16 September 2017, a "2.3%"[2] (or a "3%")[3] dimming.
Light curve for "May to now [4 October 2017]" for HAO V-band and g'-band observations, with an adjustment for an "Inverse Gaussian" model for the medium-term (month timescale) variation of OOT brightness (described below). Starting Sep 21, when g'-band replaced V-band observations, an empirical adjustment was made to all previous V-mag's (adding 0.179 mag).[1]
Note: g'-band and r'-band dip depths (and shapes) may differ, with g'-band being more sensitive to dust cloud scattering due to its shorter wavelength (0.47 vs. 0.62 micron). For a reasonable particle size distribution (e.g., Hanson, 0.2 micron) the extinction cross section ratio would produce a depth at r'-band that is 0.57 x depth at g'-band. If g'-band depth is 0.3 %, for example, depth at r'-band could be 0.17 %. The "Tabby Team" measurements (Fig. 3) at r'-band are compatible with that small dip depth. Incidentally, none of these shapes resemble exo-comet tail transits (as described by Rappaport et al, 2017 link); so the mystery of what's producing these week-timescale dips continues! Actually, long oval shapes are known to produce V-shaped dips (think of rings with a high inclination).[1]
NOTE (Drbogdan (discussió) 12:47, 28 October 2017 (UTC)): => Please see newly updated webpage for the very latest light curves at => http://www.brucegary.net/ts4/ (archived copy)
Older webpages at =>