AAVSO Alert Notice 734 announces an observing campaign on the symbiotic system HM Sge beginning immediately. Please see the notice for details and observing instructions.
There are threads for this campaign under the following forums:
Please subscribe to these threads if you are participating in the campaign so you can be updated by the astronomer and by HQ. Join in the discussion or ask questions there!
Many thanks, and Good observing,
Elizabeth O. Waagen, AAVSO HQ
I have been observing HM Sge since March 16 at the remote telescopes of Burke Gaffney Obs and Abbey Ridge Observatory. On March 21, during COS observations, I observed this with BGO (in filters V, B, R), and after the end of the planned time of COS observations, I observed this with ARO (filters V and B). In general, the brightness stays roughly the same all days.
I will wait for the announcement of the final time for the WFC3 observations.
With best regards, Filipp.
Thank you for your interest and for responding to the call! The WFC3 observations are scheduled for April 1st https://www.stsci.edu/sites/www/home/hst/observing/program-information.html?id=16492 (see Visit Status Information).
Dear Dr. Steven Goldman,
I made a few more observations with ARO and BGO when the weather allowed. Today I planned to observe HM Sge on the remote telescope of iTelescope (with V, B and U filters) during the WFC3 observations, but the observatory roof was closed. Will SOFIA's observation time be announced?
With best regards,
The SOFIA observations are a bit uncertain, but they are planned for June/July for one instrument (FORCAST) and November/December for the other (EXES). I will post an update when the flight schedule has been posted. Thank you again for your passion and enthusiasm. On behalf of the team, we really appreciate this work.
Dear Dr. Steven Goldman, thanks for your answer! I'll be waiting for this update here. So far, as recommended in the Alert Notice, I measured the brightness of this star until April 14, when the weather was clear at these observatories. I will try to continue observing this star with remote telescopes.
Our FORCAST observations are scheduled for June 29th and July 30th. It would be great to have some observations before, during, and after the SOFIA ones. Thank you all again for your previous efforts, and your dedication and commitment to this science.
I continue to observe this on a regular basis and upload it in parts to the AAVSO database. If the weather is clear at remote observatories, I will definitely observe on these dates too.
Good day, Dr. Goldman.
HM Sge is now situated low (<30deg) in the sky from our location (Abu Dhabi, UAE) when the night sets in here. I've submitted all V and B measurements to AAVSO Webobs under the code OAAA. I think that's it for this season.
Aldrin B. Gabuya (OAAA)
We are seeing some dramatic and unexpected changes in the near-IR, and would urgently request imaging in the I-band. If not, we may also be able to use other near-IR bands.
Thank you all for your contributions to this project. With each observations, the system gets more interesting. The SOFIA and Hubble observations are complete, but we would like to continue to monitor this system as we are seeing these changes.
Dr. Steven R. Goldman