Skip to main content

SN 2016cok (= ASASSN-16fq): Type IIP Supernova in M66

10 posts / 0 new
Last post
SPK's picture
SN 2016cok (= ASASSN-16fq): Type IIP Supernova in M66

Discovery by the All Sky Automated Survey for SuperNovae (ATel #9091):

"This figure shows the archival DSS image of the host (left) and the G. Bock confirmation image (right)":

Spectroscopic classification (ATel #9093):

Clear skies,

Deconinck Michel
Deconinck Michel's picture
Thank you for this alert

Thank you for this alert Patrick


Supernova in Messier 66

Image taken last may, 30 from Obs. Norba Caesarina,  MPC Z71, with SC 203 mm,  F: 1424 mm using Starlight Xpress SXVF-M7,  180s, filter: clear

File upload: 
New CCD image

SN 2016cok in M66, mag. 16.3, filter Clear. Date: 01-06-2016 22h 19m 46s T.U.
Francisco A. Violat Bordonau    Obs. Norba Caesarina   MPC Z71
SC 203 mm  F: 1424 mm    Starlight Xpress SXVF-M7    6 x 180s

File upload: 
Photometry: CCD chart

A possible CCD chart for photometry, made with the resources of the AAVSO (band: V Johnson).

File upload: 
ccd imagen y medición

Anoche tomé una imagen de SN2016cok en M66; la medición me dío 16.33ª en V Johnson con la referencia fotométrica de la carta reportada por Francisco Violat-Bordonau.

Quisiera aprovechar la ocasión para volver a contactar con Francisco, saber donde anda y que hace y mandarle recuerdos de Teófilo. Tengo el mismo correo que entonces; si te apetece contactar hazlo al correo


File upload: 
New image SN 2016cok (03 Jun 2016)

SN 2016cok   M66   16.5C   03-06-2016   22h 08m 54s T.U.
Francisco A. Violat Bordonau    Obs. Norba Caesarina   MPC Z71
SC 203 mm  F: 1424 mm    Starlight Xpress SXVF-M7    2 x 240 s

File upload: 
B.P.Vietje's picture
SN 2016cok

I got a few B & V images a few nights ago (Planewave CDK-17, Astrodon BVRI), but photometry on this one will be tough -- lots of background light from the host galaxy.

I could plate solve a "before" image from a few months back and the new images so I could accurately place the aperture in each and try to subtract the background light -- is there an accepted method for doing this?


  I certainly don't have a high degree of confidence in any measures that don't do something to compensate for the galaxy background.


Clear skies,


Brad Vietje, VBPA

Newbury, VT

WGR's picture
Subtracting pre event Galaxy

Hello Brad

I have never tried this, but I think the accepted proceedure is to get a pre event image and scale it properly and subtract it from the SN image, then do PT.  I guess properly scaling the pre event image means making it so that all the galaxy disappears in the subtraction.  Sounds easy, probably is hard--sounds like fun.



phxbird's picture
Image from 06/07/2016

I got 10 images apiece in BVIC at around 10:00 pm Daylight Mountian Time. Can't do the photometry until I can shoot some flats.  Can't shoot some flats until the weather clears! I am tempted to rebuild the flats box I used to have. Natural light flats are better but what a hassle! My computer tanked when I was trying to get flats and by the time I had it fixed it was already to late. However, here is one of the V images. Sixty seconds and processed with unsharp masked and digital development. Celstron 11" CPC at F\6.3. The seeing was not the best but it was the first clear night in a month. This was a "tourist" image I made for some non-technical friends, thus the big white arrow!

Paul Temple       Temple Research Observatory


File upload: 
Log in to post comments
AAVSO 49 Bay State Rd. Cambridge, MA 02138 617-354-0484