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C C D V I E W S #335 ** This is a special edition of CCD Views ** Table of Contents -------------------------------------------------------------------------- The last of Dr. Steve Howell's observations of Var Her 04 with the Spitzer Space Telescope has been scheduled for the following time: May 05 2005 00:09:58 UT We would like to coordinate a short but intense multicolor campaign for 6 hours centered on this time. So please observe Var Her 04 in V and Ic during this window: May 04 21:00:00 UT - May 05 03:00:00 UT Time resolution is not as important for this campaign as for the earlier campaigns since we are not attempting any period analysis. So feel free to take long exposures and stack your images. Shoot for an SNR of 50 but, as always, do your best and adapt for your system and observing conditions. We prefer that you stick with one filter instead of alternating. So if you plan to observe please post to the AAVSO Photometry Discussion Group which filter you will use (or e-mail me). That way we can be sure we have at least one observer in each filter at all times. Here is a table of comp stars for those imaging in Ic. *** Note this table has changed since our posting on April 14. We found an error in the 2nd comp star value which has been fixed. (1) AAVSO Chart ID Ic Err
133 12.54 0.01
156 14.47 0.01
Recent obs of Var Her 04: MAY 02.3546 2453492.8546 14.72 BXS CCDI Err: 0.03 APR 29.3659 2453489.8659 14.75 BXS CCDI Err: Unknown APR 26.4076 2453486.9076 14.679 CTX CCDI Err: 0.008 APR 26.3296 2453486.82964 13.929 GFB CCDI Err: 0.11 APR 26.3944 2453486.8944 16.349 CTX CCDV Err: 0.009 APR 23.3701 2453483.8701 16.521 CTX CCDV Err: 0.01 APR 22.4491 2453482.94910 16.410 HUZ CCDV Err: 0.13 BXS Steve Brady, New Hampshire, USA CTX Tim Crawford, Oregon, USA GFB Bill Goff, California, USA HUZ Richard Huziak, Saskatchewan, Canada Additional observations are requested over the next observing season. The red field companion to Var Her 04 may be brightening and could be a semiregular star. In addition, we would like to keep an eye on Var Her 04 as we continue to gather more data during this season. One more campaign is expected in July to coincide with radial velocity measurements at a major observatory. So after this week's campaign we would like to ask all observers to get at least one data point in V or Ic (or Rc if you don't have Ic) every two weeks until the end of the season. Since these are single snapshot observations, aim for SNR=100. Don't be afraid to stack many images. Good luck! 1 - Previous observers who used that star have been contacted and their observations in our database adjusted or replaced. Currently available online data is correct. -------------------------------------------------------------------------- To receive CCD Views via e-mail send a message to majordomo@aavso.org with "subscribe ccdviews" in the body of the e-mail. To unsubscribe, place "unsubscribe ccdviews" in the e-mail. The AAVSO has many free online publications. To learn more and subscribe visit: http://www.aavso.org/publications/email/. Good observing! Aaron Price, AAVSO Technical Assistant (PAH) Copyright 2005, American Association of Variable Star Observers
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