New Naked-eye Nova in Scorpius

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starfinder
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Post by starfinder »

.
And here is a close up view of Nova Scorpii itself. It is the brightest star in photo, at the centre.

Taken thru an 8" LX-90. ISO 400, 20 seconds.

Field of view is about 45 arc-minutes wide.

The other bright star near the top right is SAO 208228, mag 7.55.
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weixing
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Post by weixing »

Hi,
There is a second nova 3° due south of the Nova Scorpii 2007... RA: 16h 56m 59s and DEC: –35° 21.8'. The brightness of the new nova is currently at around magnitude 9. Just wonder did your image capture it??

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starfinder
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Post by starfinder »

I attempted to image Nova Scorpii 2007 No. 2 this morning (V1281 SCO).

The is the 2nd bright one discovered in February 2007 in Scorpius. Reportedly at about magnitude 8.8.

Attached is a crop of a photo which I took this morning (Sunday 25 February 2007 at 5:30am). The field of view in the attached image is about half a degree.

I have marked out in yellow what I think is the nova. I would say that it is about magnitude 9.5.

However, I have found another equally bright object which is not found in the program I used, The Sky. That shows stars surrounding it from mag 9 to 12.

Have I discovered another nova??
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Tachyon
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Post by Tachyon »

It's difficult to tell. Did you see that in all the pictures u took? Did you do a dark frame subtraction? It could be a hot pixel...
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Post by starfinder »

Tachyon wrote:It's difficult to tell. Did you see that in all the pictures u took? Did you do a dark frame subtraction? It could be a hot pixel...
Hi Tachyon,

First, I have checked the software's chart carefully again. I think the mystery extra star is the blush-white one immediately below the orangeish star shown with the red arrow in my photo above, which is GSC 7372:591 (mag 10.36). At the 6:30 o'clock position.

Second. I took 4 frames of different durations. This additional star is there on the 3 brightest frames and looks like several pixels in size when zoomed into, so it is not a hot pixel.


Attached below is a zoomed crop of the bluish-white mystery star: R.A. 16h57m13s Dec -35d39m19s (Epoch 2000.0), marked with the yellow arrow. It is aboout mag 11.5.


Can someone find this mystery star on another planetarium software?
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