Dec 5th - long planetary transit HAT-P-15 campaign

[Lukasz Wyrzykowski]

Dear All,

Thank you to all who attempted to observe the planetary transit on November 30th! We got some beautiful data! 

Let's try another one coming soon, on December 5th, starting 19:30 UT:

HAT-P-15: 

https://bh-tom2.astrolabs.pl/targets/HAT-P-15/

The exact ephemeris for this transit is provided under the link below, computed for central Poland, but should be applicable for most of Europe:

https://astro.swarthmore.edu/transits/print_transits.cgi?observatory_string=53.062%3B17.681%3BEurope%2FWarsaw%3BObserwatorium%20Astronomiczne%20Nied%C5%BAwiady&use_utc=0&single_object=3&observatory_latitude=53.062&observatory_longitude=17.681&timezone=Europe/Warsaw&days_to_print=90&days_in_past=0&target_string=HAT-P-15%20b&minimum_start_elevation=30&and_vs_or=or&minimum_end_elevation=30&minimum_ha=-12&maximum_ha=12&baseline_hrs=1.4&show_unc=&minimum_priority=0&minimum_depth=0&print_html=1&twilight=-18

The details on the planet are provided on the ExoClock page: 

https://www.exoclock.space/database/planets/HAT-P-15b/

The duration of the transit is more than 5h. Please try to catch at least some part of the transit during the night of Dec 5th.  The host star is about 12 mag in V, but the transit depth is just 13mmag, hence we need very high quality data - make sure your exposure times are long enough. Also, the cadence of observations should be as dense as possible, so we can extract this faint signal. 

Use red bands or no filter. And start observing the target at least 1h before the start of the transit and/or 1h after the transit.

This is yet another test of BHTOM capabilities in planetary transit observations with a heterogeneous network of telescopes. I strongly encourage as many of you as possible to join this campaign. 

Clear skies,

Lukasz

on behalf of BHTOM.space team