spectro-aras.com

Hello,

new interesting target being alerted by TNS https://www.wis-tns.org/object/2024aauu

It is located a few arc seconds from WISEA J053752.10+493717.4, galaxy of m=20 (data NED)

Here is its spectrum after 4*30 minutes of exposure.

at2024aauu.png

The offset of the line Ha would correspond ...

Hello,
on the same night as the observation of AT2024zrq), I pointed the telescope to another target called AT2024zue which had just been the subject of a Discovery Report on TNS: https://www.wis-tns.org/object/2024zue/discovery-cert

I pointed the object (m=19!!!) by aligning the extension of the ...

Voici le spectre d'une galaxie faisant l'objet d'une alerte via le TNS https://www.wis-tns.org/object/2024zrq
LEDA 3098544 de magnitude B=16.5 est distante dun peu plus de 300 Mpc. (z=0.076 données Simbad)

Le pointage a été réalisé quasi en aveugle. L'étoile de ref est hd 214208 (type A1III)


AT ...

Hello,

Check that all images have the same pixel format

Emmanuel

Impressive !!
Emmanuel

Hello,

sn type II discovered the 2024-03-02. See discovery report here : https://www.wis-tns.org/object/2024drt/discovery-cert

H alpha and H epsilon redshifted show z of about 0.024

spectrum taken with an alpy 200 on a Newton 300 f/4
Data Process with Isis. Star ref is hd 113697


sn2024drt_png ...

Hello,

Here is a spectrum taken last night with the new Alpy 200 spectrograph.
47 days after first detection, sn2024bch develops strong broad Balmer lines due to the very high ejection velocities (mesured at about 8000 km/s)
P cygni profil not yet visible.

Cheers
Emmanuel

If it is, it should develop strong broad Balmer P Cygni lines like here
https://britastro.org/observations/obse ... 4d96087a30

Excellent reason to continue observations.

Hello,
Here is a spectrum taken last night. Despite the very low signal noise ratio, we can see a wide line in emission around 4680 A and a short Ha line slighty redshifted. More exposure is required asap. Possible sn type II.
Poor weather conditions : fog and few high level clouds
Cheers
Emmanuel

Hi Juan José,

Input beam focal ratio of Alpy 600 is f/4. So, this spectrograph is fully suitable to work with a f/4 telescope and needs no additional optics that can introduce chromatism.

Regards

Emmanuel