Now confirmed as type II (LT SPRAT), Also consistent with a low resolution ALPY200 spectrum taken last night in poor conditions (twilight, high cloud) which shows a blue continuum and no obvious Si II absorption
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- Mon May 15, 2023 11:45 am
- Forum: Supernovae
- Topic: possible supernova AT2023ijd in NGC4568
- Replies: 1
- Views: 2751
- Sun May 14, 2023 3:13 pm
- Forum: Supernovae
- Topic: possible supernova AT2023ijd in NGC4568
- Replies: 1
- Views: 2751
possible supernova AT2023ijd in NGC4568
A possible supernova AT2023ijd in NGC4568 just announced by the ASAS-SN team. https://www.wis-tns.org/object/2023ijd It appeared within the last 24 hours so caught early at mag 16.8 but is likely to be brightening fast and at only ~18Mpc this could get pretty bright (A type 1a could reach ~mag 12) C...
- Wed Apr 26, 2023 11:12 am
- Forum: Supernovae
- Topic: at2023geu, possible SN
- Replies: 4
- Views: 2061
Re: at2023geu, possible SN
Here is a transient with a very similar spectrum which I classified as a CV
https://www.wis-tns.org/object/2021bxp
There is a faint blue star visible in the DSS archive image for this object and also for your object
Cheers
Robin
https://www.wis-tns.org/object/2021bxp
There is a faint blue star visible in the DSS archive image for this object and also for your object
Cheers
Robin
- Wed Apr 26, 2023 11:00 am
- Forum: Supernovae
- Topic: at2023geu, possible SN
- Replies: 4
- Views: 2061
Re: at2023geu, possible SN
Hi Emmanuel, I agree. This is definitely not a supernova. The spectrum is not that of a supernova and the redshift is almost zero. I see your classification in TNS. I recommend adding more information about your equipment so users know the resolution for example. It is a good idea to add the spectru...
- Sun Apr 16, 2023 12:45 pm
- Forum: Supernovae
- Topic: sn2023czd
- Replies: 1
- Views: 1387
Re: sn2023czd
An impressive result at mag 16. I see amateur Claudio Balcon made the official classification, beating the professional team by just 3 minutes !
https://www.wis-tns.org/object/2023czd
Cheers
Robin
https://www.wis-tns.org/object/2023czd
Cheers
Robin
- Sun Apr 09, 2023 5:20 pm
- Forum: Spectroscopes and Softwares
- Topic: how to improve the visibility of objects in an Alpy600?
- Replies: 5
- Views: 4978
Re: how to improve the visibility of objects in an Alpy600?
Hi Juan José, An ALPY with a 200 l/mm grism and standard 23um slit gives a resolving power of ~130 which is similar to the resolution of the SED machine used by the Zwicky transient facility for supernova classification. https://nickkonidaris.com/sed-machine/ Have you added your name to Shelyak's li...
- Fri Apr 07, 2023 10:26 pm
- Forum: Spectroscopes and Softwares
- Topic: how to improve the visibility of objects in an Alpy600?
- Replies: 5
- Views: 4978
Re: how to improve the visibility of objects in an Alpy600?
Here is an example of the ALPY guide camera image when measuring a galaxy (IC708) using a brighter guide star in the same field
https://britastro.org/observations/obse ... c89b9255ae
Cheers
Robin
The spectrum is herehttps://britastro.org/observations/obse ... c89b9255ae
Cheers
Robin
- Fri Apr 07, 2023 10:04 pm
- Forum: Spectroscopes and Softwares
- Topic: how to improve the visibility of objects in an Alpy600?
- Replies: 5
- Views: 4978
Re: how to improve the visibility of objects in an Alpy600?
The ATIK Titan is one of the best cameras for this application (I wish I had one. I use an old ATIK16-ICS but will replace it with an ATIK 314 when it fails) I measure the spectra of targets as faint as mag 19 using a specially modified low resolution ALPY for example https://britastro.org/observati...
- Wed Mar 29, 2023 1:47 pm
- Forum: Spectra, results, information on activity ...
- Topic: Spectra data of PN acquired with Alpy as reference
- Replies: 5
- Views: 4820
Re: Spectra data of PN acquired with Alpy as reference
Hi Sam, Yes a standard ALPY 600 with 23um slit and calibration and guider units on a Celestron C11 with a focal reducer running at f5.5 (See the warning below about focal reducers. I use one because I am mainly interested in maximum sensitivity on faint objects) I will email you a dropbox link with ...
- Sun Mar 26, 2023 4:30 pm
- Forum: Spectra, results, information on activity ...
- Topic: Spectra data of PN acquired with Alpy as reference
- Replies: 5
- Views: 4820
Re: Spectra data of PN acquired with Alpy as reference
There are also some spectra of other PNe taken using the ALPY 600 in the BAA spectroscopy database
And Francois Teyssier's analysis of NGC6293 here might also be of interest
http://www.astronomie-amateur.fr/feuill ... C2392.html
Cheers
Robin
And Francois Teyssier's analysis of NGC6293 here might also be of interest
http://www.astronomie-amateur.fr/feuill ... C2392.html
Cheers
Robin