spectro-aras.com

I will be interested to see what you find. I still have the same issue. I use ISIS which gives a good fit using auto calibration using the calibration lamp but gives an increasing offset towards the blue on stars. I noticed among spectra collected during a STAROS campaign that some ALPY users seem t...

Good try Tom ! Type II can be almost featureless at this stage. It will probably develop with time though. Compare with SN 2023ixf for example week 1 https://britastro.org/observations/observation.php?id=20230528_140227_583fe05370c08912 week 2-3 https://britastro.org/observations/observation.php?id=...

SN 2024ggi a nearby type II supernova in NGC3621 (Dec -32 deg) https://www.wis-tns.org/object/2024ggi It was discovered last night, is rising rapidly and is generating a lot of interest. NGC3621 is at a similar distance to SN 2023ixf in M101 which reached V mag 11 last year so if you are far enough ...

https://www.wis-tns.org/object/2024fjh

mag 11.8

Robin

And this is what I've managed with an Alpy. I suspect it's a little fainter than the 10th magnitude it has been estimated at. Similar result of about +/- 4200 km/s for the expanding shell. Yes the latest report on TNS suggests it is fading rapidly 2024-03-18 18:34:24.000 11.56 (sloan g) Robin

there appears to be a bug/ "undocumented feature" in the way ISIS applies a smile correction (for example used in place of slant when selecting the ALPY 600 option). It can produce a shift in the dispersion direction at the Y location of the spectrum as here for example with the ALPY 200. ...

04:55:03.766 -65:55:57.18
https://www.wis-tns.org/object/2024epj

Robin

Nice Spectrum! A close match to SN2023ixf at a similar age
https://britastro.org/specdb/data_graph ... s_id=13980

Cheers
Robin

As far as I can see, STAROS does not even have a discussion forum. To me STAROS seems all one way with little feedback and discussion. Considering how much effort went in to recovering the ARAS forum after the hack would it not at least be useful to use the ARAS forum as a base for STAROS discussion...

Hi Robin, The page you're referring to was written over 20 years ago, and things have come a long way since then. ARAS remains an informal group of observers who contribute to spectroscopy on targets such as novaes, symbiotics, cataclysmics, but there are no other actions carried out, notably in th...