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Recurring Nova T CbR

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#1 pbealo

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Posted 03 February 2024 - 03:11 PM

There is an unconfirmed report that T Corona Borealis is undergoing its once every 80 year eruption. Go out and observe it!!

 

https://en.wikipedia...CrBLocation.png

 

Happy Hunting!

 

Peter B

 



#2 PeteDavidsonTheFirst

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Posted 03 February 2024 - 06:05 PM

Source?

I have a few hrs of baited breath to wait for the reports to come in...

#3 pbealo

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Posted 03 February 2024 - 06:47 PM

AAVSO mgmt., but from only ONE image. May be issue with filter wheel, but too interesting not to get others to give it a look. A visual observer later reported no outburst.

 

People scheduled to use iTelescope tonight to confirm or deny.

 

Peter



#4 robin_astro

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Posted 03 February 2024 - 07:39 PM

I suspect a false alarm. I am on it now with the telescope finder. There is only the occasional gap in the clouds but I am seeing nearby stars down to mag 8 pop in and out but nothing seen at T CrB location

 

Robin


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#5 robin_astro

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Posted 03 February 2024 - 08:51 PM

A quick grab off the finder camera in a gap in the clouds. Looks the normal ~mag 10 to me

 

Robin

 

 

T CrB_THO_20240204_01_30png.png

 



#6 robin_astro

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Posted 03 February 2024 - 08:57 PM

Here it is without the marker. (TCrB looks fuzzy due to out of focus IR in this unfiltered image from the fast achromatic finder scope)

 

T CrB_THO_20240204_01_30png_no_overlay.png



#7 Rutilus

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Posted 04 February 2024 - 04:11 AM

Yes, T CrB  was at normal magnitude this morning. While I had very heavy cloud cover, this morning I did get a break 

for a couple of minutes. Took this image, in the brightening pre-dawn sky, but still very hazy sky conditions. 

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  • T-CrB-04-02-2024-B.jpg

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#8 mborland

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Posted 04 February 2024 - 11:37 PM

I took a spectrum of T CrB last night (MidCapture=2024-02-04T10:08:17.0529351Z, JDMidCapture=2460342.922420) with a 120mm APO refractor and ALPY600. Response is corrected using data for HD97633. Object and reference star were both at about 35 degrees (at different times of the night, of course).

 

It's an odd looking spectrum, to be sure, but then I don' t know what to expect.

 

BlazeStar-JD2460342.922420.png

 

--Michael

 



#9 robin_astro

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Posted 05 February 2024 - 09:14 AM

Perfectly normal for T CrB.  A cool giant star with H alpha emission from the material accreting from it onto the white dwarf. This builds up onto the surface of the white dwarf until every 80 years, the surface material reaches a critical density and boom ! you get a Nova. The spectrum will look very different then

 

Cheers

Robin


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#10 robin_astro

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Posted 05 February 2024 - 09:28 AM

Here are a couple of spectra from the collection in the BAA database

 

A recent low resolution R~1000 by Woody Sims with the Pickles M3iii standard spectrum overlaid

 

https://britastro.or...i&legend_pos=nw

 

and the H alpha region at higher resolution R~5500 using my LHIRES 

 

https://britastro.or...hp?obs_id=14347

 

Cheers

Robin


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#11 KMA

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Posted 06 February 2024 - 04:23 AM

Using 152mm f10 refractor with 21mm Pentax eyepiece

T CrB observed visually  at morning hours

as 10.2m visual magnitude.

20240206.3375. (6 Feb 2024)

 

best sky wish

KMA




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