Re: BJD_TDM revisited re ACP
Posted by
karenacollins on
Nov 19, 2018; 12:03pm
URL: http://astroimagej.170.s1.nabble.com/BJD-TDM-revisited-re-ACP-tp1077p1078.html
The main difference for TDB is keeping track of the number of leap-seconds at the time of the observation, which is downloadable from here:
http://maia.usno.navy.mil/ser7/tai-utc.dat
Other than that, it is simple offset.
The code is available on the Eastman website here:
http://astroutils.astronomy.ohio-state.edu/time/index.html
Karen
On 11/19/2018 4:40 AM, gboyle [via AstroImageJ] wrote:
Hi Karen
we touched on this before. Bob Denny at ACP has added BJD to fits headers presumably in response to requests from science users but the implementation gives a value for BJD_OBS and therefore is UTC based as opposed to TDM .
I have posted a "new feature request" for BJD_TDM and pointed towards the 2010 Eastman paper - but if he were inclined to add the feature do you know where we might find a code or calculation that he can download so that I can point him towards that as otherwise
doing TDM from scratch might look like a lot of work...!
best
gavin