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Supernova in NGC 2554 - Cancer

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#1 Edward E

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Posted 05 April 2013 - 02:57 PM

Well if the SN in M 65 is getting you down and your a SN addict like me, then here is another for you to try and it is brighter than the one in M 65. The galaxy is in Canter, NW of M 44. The SN has a V mag of 14.7 and is just SW of the galaxies bright central region. The galaxy is framed by 3, 14 mag stars that will help with IDing the galaxy and the SN. Attached is a finder chart for the SN. The galaxy is plotted on chart 30 of the excellent & free "Deep Sky Hunting Atlas" provided by Michael over in the Stellar Media Forum. Happy hunting!

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#2 Rich (RLTYS)

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Posted 06 April 2013 - 06:48 AM

Thanks for the info. Will have to try to image SN J08175.

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#3 nytecam

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Posted 07 April 2013 - 04:45 AM

Thanks for that eg SN in NGC2554 @ m14.7 - will try on first clear night like last night but family birthday celebrations came first ;)

#4 Rich (RLTYS)

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Posted 07 April 2013 - 06:08 PM

Just took this image of the SN in NGC 2554 with the SLOOH remote observatory.

Rich (RLTYS)

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#5 Edward E

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Posted 08 April 2013 - 11:03 AM

Nice image and it shows nicely an issue with observing this SN visually, that is, how close the SN is to the bright nucleus. I had a go with this SN Saturday night. There was some light cirriform clouds scattered about and the seeing was average at best. With my 20" f4.5 using a 14mm & 8.8 Meade 4000 UWA (163X & 260X) eyepieces, I could, with adverted vision just make out two bright spots, one was the galaxy's nucleus and the other was the SN. It was difficult with the seeing to separate the glow of the nucleus from the SN. Only during moments of calm air would the two separate into distinct components. Still it was worth the search and waiting for calm air.

#6 nytecam

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Posted 08 April 2013 - 01:15 PM

Excellent work - still awaiting a clear night :grin:

#7 nytecam

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Posted 08 April 2013 - 04:06 PM

Got lucky at dusk tonight in increasing haze as below :grin:

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#8 george golitzin

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Posted 09 April 2013 - 12:00 AM

Thanks Edward for posting this, and thanks Nytecam for the great picture. It took me a while to appreciate the scale of that picture, just how close the SN is the galaxy core; seeing was pretty soft with a cool breeze blowing, but I was able to get a clear split in averted vision in my 18-inch with the 5mm XW (no paracorr, for 380X); although stars were a bit bloated, I went to the 3.5mm (545X) and waited patiently until I got again a very clear view with better separation than at the lower power. A tough one, to be sure. It seemed to me the SN was quite a bit fainter than the mag 13 star which megastar shows 1.2 arcmin to the SSE of the core. Observation was at home under a mag 5 sky.

Thanks again both of you for your help on this one!

-George

#9 Rich (RLTYS)

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Posted 09 April 2013 - 05:54 PM

This SN appears to be about mag 14.8.

Rich (RLTYS)

#10 nytecam

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Posted 10 April 2013 - 02:28 AM

This SN appears to be about mag 14.8. Rich (RLTYS)

The only mags I can find are on Bright Supernova page which need careful checking as some are undefined as to filter, if used. The "m14.8" appears to be a red magnitude and visual will be typically 1 mag fainter :o

#11 Rich (RLTYS)

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Posted 10 April 2013 - 03:37 PM

Not sure I agree. Can you tell me where on the Bright Supernova homepage you found mag estimates for this SN? I've not been able to locate them. :confused:

Rich (RLTYS)

#12 nytecam

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Posted 10 April 2013 - 04:11 PM

Not sure I agree. Can you tell me where on the Bright Supernova homepage you found mag estimates for this SN? I've not been able to locate them. :confused:
Rich (RLTYS)

Rich - I checked the images posted, some with mag estimates :grin:

#13 blb

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Posted 10 April 2013 - 05:28 PM

Can you tell me where on the Bright Supernova homepage you found mag estimates for this SN? I've not been able to locate them. :confused:

Sure, just click on the Supernova in the list that you are interested in and when the information about the nova comes up (about three or four lines) click on the hyperlink for magnitude and that will bring up a list of those mag. that have been reported.

#14 nytecam

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Posted 11 April 2013 - 05:10 PM

This SN continues to be relatively bright [compared to 2013am in M65 which seems to be fading] - was clear tonight - here's a sampler that clearly shows this SN immediately south of the gxy core in just 5s exposure which perhaps mimics the eyepiece view :o

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#15 Bill Weir

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Posted 11 April 2013 - 09:22 PM

It's on my list for this evening along with a third try (first two were successful) at 2013am. Think it will be cool to have seen 2 different super nova in one observing session.

Bill

#16 nytecam

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Posted 12 April 2013 - 05:00 AM

Here's a better/ deeper pic of this SN from last night - data on image. What a difference NELM 3.8 last night against NELM-1.5 through thin cloud on Apr 8 for my 1st shot of this SN :grin:

I think this is the SN to look for rather than 2013am in M65 which I think is much fainter and now fading :o

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#17 RolandosCY

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Posted 14 April 2013 - 09:20 AM

...just how close the SN is the galaxy core; seeing was pretty soft with a cool breeze blowing, but I was able to get a clear split in averted vision in my 18-inch with the 5mm XW (no paracorr, for 380X...-George

Indeed, it is readily observable with 18 inches and I would dare say under optimum conditions it might be doable with less than 15 inches. Last Friday evening we have had quite steady seeing, and the nucleus and supernova were quite distinct. I was surprised by the brightness of the galaxy, I got carried away from the CCD images on this thread and I expected a much fainter galaxy.

I include the central part of my sketch which shows the SN to the right (south) of the galaxy core (I include only part of the sketch as the low resolution allowed at CN makes the SN inseparable). The sketch was made with my 18" and a 7mm TV Nagler at 294X.

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#18 nytecam

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Posted 14 April 2013 - 02:14 PM

Impressive work - well done :bow:

#19 george golitzin

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Posted 15 April 2013 - 01:11 AM

Indeed, a very nice sketch!

-geo

#20 RolandosCY

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Posted 15 April 2013 - 12:27 PM

Thanks guys!!! :bigblush:

#21 nytecam

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Posted 16 April 2013 - 11:29 AM

Despite tonight's very poor transparency [NELM 3.4] SN captured in 5s [inset below] - SN brightness steady ;)

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#22 NJScope

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Posted 18 April 2013 - 08:42 PM

The moon was unfortunately in the same neighborhood last night at 02:00:00 UT, so I was not able to go very deep in the attached V mag image. My best guess is that PSN J08175346+2328105 ranges between 14.5 and 15 Vmag.

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