Observing Campaigns #875: Monitoring T CrB

View Campaign: Details for Monitoring T CrB

Abstract: The AAVSO and multiple astronomers request ongoing monitoring of the recurrent nova T CrB 1) to alert the astronomical community as soon as T CrB begins its eruption, and 2) to continue to build its multicolor light curve prior to, during, and after the anticipated eruption. Observations with all filters, as well as visual observations, are requested. Spectroscopy is also requested. Observations should be reported to the AAVSO International Database (AID) or AAVSO Spectroscopy Database (AVSpec) as soon as possible after making them. Discussion re T CrB has been moved from the old (now archived) AAVSO forum to the AAVSO forum created in October 2024 for this observing campaign.

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Please carry out conversations about T CrB in this forum. Links to updated instructions for photometry, visual observations, and spectroscopy; an excellent and important blog post on how to observe T CrB now and when it erupts; links to pre-made and custom finder charts with comparison stars; and other information may be found at the campaign linked to this forum (no. 875). If the link to the campaign above this post is not working, you may go directly here: Details for Monitoring T CrB

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Iā€™m amazed that there seems to be no activity in this campaign. Never the less, I have been doing spectroscopy (R=3000 18in Newt, Maryland). Mag 10 is about the lowest brightness I can do, but I have been seeing H emission lines changes in the red and blue spectra. I have difficulty submitting spectra to AAVSO, but meanwhile will be glad to send spectra to anyone interested. John Menke MJLE

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T CrB V-Ic and B-V values have increased recently, over the last 20 days or so. V-Rc mostly unchanged. Something is different!

Here is a summary of my spectroscopy over the past few months. I also see variances in the continuum spectral shapes in the red and blue. John at menkescientific.com

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