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Spectral comparison of T CrB


 

Dear RAC and CAS,

There has been recent increase in the accretion rate of the mass transfer in the T CrB recurrent nova system that was announced recently by professional astronomers. It was detected by increased emission features in the spectrum of this star. Whether this means an eruption or outburst is imminent is uncertain.

I got two hours of data on the morning of February 14, 2025. The light curve was pretty stable and looked to be at magnitude 10.2. No unusual features were detected in the curve from what I have been seeing since March of 2024 when I began intensively monitoring the star. I also was able to obtain a low resolution spectrum which also looks similar to those i have been getting all along. So from my limited ability with my amateur telescope and low resolution spectra-I have not seen any changes yet that are big enough for me to detect.

I have enclosed a screen shot of two spectra-one obtained on March 20, 2024 and the other on the morning of February 14, 2025. Aside from differences in clarity ( due to seeing)-they look essential unchanged.

Myron