Affiliation
Association Francaise des Observateurs d'Etoiles Variables (AFOEV)
Sat, 05/28/2016 - 19:18
Discovery by the All Sky Automated Survey for SuperNovae (ATel #9091):
http://www.astronomerstelegram.org/?read=9091
"This figure shows the archival DSS image of the host (left) and the G. Bock confirmation image (right)":
http://www.astronomy.ohio-state.edu/~assassin/followup/asassn-16fq.png
Spectroscopic classification (ATel #9093):
http://www.astronomerstelegram.org/?read=9093
Clear skies,
Patrick
Thank you for this alert Patrick
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
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
A possible CCD chart for photometry, made with the resources of the AAVSO (band: V Johnson).
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 teoarranz@yahoo.es.
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
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
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.
Gary
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