British Astronomical Association
Supporting amateur astronomers since 1890

Secondary menu

Main menu

Home Forums Spectroscopy
Terms of use

request for spectra of possible supernova AT2017haf

5 posts / 0 new
Last post
Robin Leadbeater's picture
Offline
Last seen: 7 hours 10 min ago
Joined: 05/03/2014 - 00:50
request for spectra of possible supernova AT2017haf
I have had a request from a professional team for spectra to classify possible supernova AT2017haf
which was discovered 2017-09-30 on the rise at mag 16
They are intensively following up all nearby type 1a supernova and if it is found to be 1a before Wednesday they have telescope time available. The weather forecast is not good here though so is there anyone else who would like to try for it?  If you get a spectrum I can assist in the classification.
 
The same team are also following up my recent type 1a classifications SN2017gxq and  SN2017gjn
 
Cheers
Robin
k.gurney's picture
Offline
Last seen: 1 week 4 days ago
Joined: 08/01/2016 - 18:58
Is Thursday too late for this

Is Thursday too late for this?

There is clear sky forecast here, although I have a load of teaching Thursday/Friday (so mechanics of life may preclude...)

I can see the galaxy in the DSS image overlaid in CdC but coords differ from those advertised (maybe an epoch issue?). Anyway, I'll let you know if I am game for it later this week

Kevin

Robin Leadbeater's picture
Offline
Last seen: 7 hours 10 min ago
Joined: 05/03/2014 - 00:50
AT2017haf - now classified as a type 1a

Hi Kevin,

I have just seen that the iPTF team have now classified it (type 1a) so no need to go for it, unless you want to of course.

https://wis-tns.weizmann.ac.il/object/2017haf

Interestingly the "SED machine" spectrograph they use is even lower resolution than mine. They are definitely a rival ;-)

The location looks spot on to me in CdC if I overlay the DSS image so probably an epoch issue. (The TNS coordinates are J2000). It is quite close to the galaxy core though so separating it from the galaxy could be a problem.

Cheers

Robin 

k.gurney's picture
Offline
Last seen: 1 week 4 days ago
Joined: 08/01/2016 - 18:58
supernova

Hi Robin

I see its mag 16 - I struggled with 3C-273 at mag 13 (see my personal page) ... Do you use an Alpy or lower res instrument?

Kevin

Robin Leadbeater's picture
Offline
Last seen: 7 hours 10 min ago
Joined: 05/03/2014 - 00:50
spectrograph used

Hi Kevin,

For supernovae I use a specially modified ALPY with a lower dispersion GRISM which allows me to  get down to ~mag 17.5 compared with ~mag 15.5 with the standard ALPY with my C11

http://www.threehillsobservatory.co.uk/astro/spectroscopy_20.htm

Cheers

Robin