We report the observation of 7 transients using the Kast Double Spectrograph on the 3.05 meter C. Donald Shane telescope at the Lick observatory. Observations were obtained between MJD 60403.14 and MJD 60403.53
On the red side detector the 300/7500 grating was used, which has a dispersion of 2.55 Å/pixel. On the blue side the 600/4310 grism was used, which has a dispersion of 1.02 Å/pixel. A slit width of 1.5" was used for all observations. Spectra were reduced using the UCSC Spectral Pipeline (Siebert et al. 2019). A spectral range of approximately 3590-10490 Å was obtained for the reduced spectra.
Of these 7 transients classifications were found for 6 events, which includes 1 SN Iax (02cx-like), 1 SN 1a 91T-like and 4 SN Ia. Classifications were performed either by eye for obvious cases, or by fitting observations to template spectra from previously classified transients using Next Generation Superfit (NGSF, Goldwasser et al. 2022).
Details of each observed transient are summarised in the "Related Objects" table. Further follow-up observations are encouraged of the target for which we did not obtain a concrete classification. The spectrum of this unclassifed object has been included in this Astronote.
| Catalog | Name | Reported RA | Reported DEC | Reported Obj-Type | Reported Redshift | Host Name | Host Redshift | Remarks | TNS RA | TNS DEC | TNS Obj-Type | TNS Redshift |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| TNS | 2024ox [ZTF24aaartcf] | 17:02:12.905 | +56:11:48.02 | SN Iax[02cx-like] | 0.0299 | MCG +09-28-017 | Redshift of z=0.0299±0.0001 obtained from host H-alpha emission. Classification obtained using matches to the NGSF SN Ia 02cx-like template spectra from SN2002cx and SN2005hk. Lightcurve is also underluminous at peak, with an SDSS r-band magnitude of ~-18, characteristic of the 02cx-like subclass. | 17:02:12.918 | +56:11:47.92 | SN Iax[02cx-like] | 0.0299 | |
| TNS | 2024eui [ZTF18aawqjjj] | 10:52:51.359 | +37:25:37.02 | SN Ia | 0.0868 | SDSS J105251.39+372536.6 | Broad Si II absorption visible. Redshift obtained from host H-alpha emission. | 10:52:51.350 | +37:25:36.80 | SN Ia | 0.0868 | |
| TNS | 2024faj [ZTF24aagxdol] | 07:59:49.603 | +08:26:54.85 | SN Ia-91T-like | 0.0725 | Redshift of z=0.0725±0.0055 and classification obtained using matches to the NGSF SN Ia template spectra from SN1991T, SN2012cg, SN2012fr and SN2000cx, with its Si II profile matching that from SN1991T well. Lightcurve is also highly luminous at peak, with an absolute SDSS g-band magnitude brighter than -19.6, characteristic of the 91T-like subclass. | 07:59:49.603 | +08:26:54.85 | SN Ia-91T-like | 0.0725 | ||
| TNS | 2024eao [ZTF24aagpxan] | 06:09:46.380 | +43:57:11.77 | SN Ia | 0.0277 | Broad Si II absorption visible. Redshift obtained from host emission lines. | 06:09:46.380 | +43:57:11.77 | SN Ia | 0.0277 | ||
| TNS | 2024dwv [ZTF24aagpwsh] | 06:42:19.679 | +41:57:27.59 | SN Ia | 0.0431 | WISEA J064219.69+415726.5 | Broad Si II absorption visible. Redshift obtained from host emission lines. | 06:42:19.679 | +41:57:27.59 | SN Ia | 0.0431 | |
| TNS | 2024enp [ZTF24aahgcwg] | 06:19:34.348 | +55:11:48.02 | SN Ia | 0.0443 | Broad Si II absorption visible. Redshift obtained from host emission lines. | 06:19:34.348 | +55:11:48.02 | SN Ia | 0.0443 | ||
| TNS | 2024dlo [ZTF24aagkvvm] | 16:02:12.817 | +15:54:27.61 | 0.0358 | Host galaxy dominated, nuclear transient. Lightcurve currently on the decline, r~18.6 and g~19.7. | 16:02:12.817 | +15:54:27.61 |
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