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18 Dec - Supernovae hunting SN2019upw, SN2019tua, SN2019tgm


alanjgreen

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Scope: 20” f3.6 Lukehurst Dob with Paracorr (fl = 2089mm & f4.1).
Night Vision: PVS-14 with Photonis 4g INTENS.
Eyepieces: DeLite 18.2mm (f5.8 x115).

 

I was out supernovae hunting last night with three SN targets planned

1= NGC109/SN2019upw

2= UGC11860/SN2019tua

3= UGC11979/SN2019tgm

 

I am happy to report that I observed 2 out of 3. Here are some notes to help others.

 

NGC109 /  SN2019upw

109.jpg.00e4cd84982daacf88bdb8ea63fa931a.jpg

This one is fairly straightforward as there are few field stars in the area. Once you find the three brighter stars in a triangle then the galaxy is easily seen in the centre. There are 4 faint stars on one side of the galaxy and one on the other. The SN is separate from the core. As I was only using x115 magnification then the split was not straightforward and time was needed to wait and observe for the split to come and go!

 

UGC11860/SN2019tua

11860.jpg.b755bb5e65b781399a0b42cb22c82619.jpg

This galaxy was really well placed at the zenith at around 1830 last night. The galaxy was not seen but the SN is there. It takes time to find the right spot but there is a field star "3D cube" just above, once you find the cube then you can find the SN. (See stars marked A,B,C,D on my diagram, the Supernova is X).

 

UGC11979/SN2019tgm

11979.jpg.43fe94d0b0c24e85edb6294592943893.jpg

This is the toughest, there are so many field stars that it is hard to find what to match to the internet images. Anyway, it turned out that I was looking in the wrong place but the stars I drew do match the images so I was just a small way off. 

Look carefully at my sketch and there are two rows of field stars (the 3+2 and the 3, the middle star of the lower 3 is a double), if you can find these two rows of stars at the eyepiece then the SN is in-between these rows as shown by the blue box (added this morning). I was looking further up in a tight cluster of stars where the tiny galaxy appeared to be (my mistake!).

 

Happy hunting!

Alan

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