DRAFT
2026-05-20 16:10:44
Type: Object/s-Discovery/Classification
Bibcode: 2026TNSAN.146....1C
Transient Classification with Gemini
Authors: A. Cikota (NOIRLab/Gemini South), P. Pessi (NCBJ), V. Firpo (NOIRLab/Gemini South), F. Gran (NOIRLab/Gemini South), L. Magill (NOIRLab/Gemini South), K. Silva (NOIRLab/Gemini South), P. Candia (NOIRLab/Gemini South), R. Ruiz-Carmona (NOIRLab/Gemini South), S. Panda (NOIRLab/Gemini South), J. Font-Serra (NOIRLab/Gemini South), R. Angeloni (NOIRLab/Gemini South), V. Kalari (NOIRLab/Gemini South), C. Rodriguez (NOIRLab/Gemini South), J.-E. Heo (NOIRLab/Gemini South), E. Sabbi (NOIRLab), T. Ahumada (NOIRLab/ SOAR), R. Cartier (University of Antofagasta), S. Cikota (CAHA)
Keywords: Spectroscopy, Transient, Supernova
Abstract:
We report spectroscopic observations of 3 transients as Type Ia supernovae.

We report the spectra of three transients observed with the GMOS instrument at the Gemini South telescope as part of our bad-weather filler program. This program is designed to make productive use of poor observing conditions by obtaining spectroscopic observations of recently discovered transients, with the aim of providing timely classifications to the community.

The observations presented here were obtained with the grism R150 with a slit of 1.5", combining two 600-second exposures, with a 20 nm shift between the two central wavelength settings in order to compensate for the gaps between the detector chips. 

Targets are automatically selected from the Transient Name Server (TNS), with an updated automated selection system soon to be deployed in order to have better control over the selected targets.

The data were reduced using the standard Gemini data reduction software DRAGONS, following the procedures provided by the observatory. The classification was inferred by spectral matching using the Supernova Identification software (SNID, Blondin & Tonry 2007, 2007ApJ...666.1024B) and NGSF (Next Generation SuperFit; AstroNote 2022-191, Howell et al. 2005 2005ApJ...634.1190H).

Show current TNS values
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 2026hlq 20:31:57.946 -10:45:32.46 SN Ia 0.066 Spectral matching suggests the SN is around 50 days past peak. Redshift from spectral matching. 20:31:57.946 -10:45:32.46 SN Ia 0.066
TNS 2026lmm 14:21:41.050 -29:53:17.15 SN Ia 0.056 LEDA 723985 0.056 Spectral matching suggests the SN is around 10 days past peak. Redshift from spectral matching agrees with the redshift reported for the host. 14:21:41.050 -29:53:17.15 SN Ia 0.056
TNS 2026lkm 14:41:39.027 -37:13:46.68 SN Ia 0.028 ESO 386-8 Spectral matching suggests the SN is around peak. Redshift from spectral matching. 14:41:39.027 -37:13:46.68 SN Ia 0.028
File Comments
AT2026hlq_0.txt
AT2026lmm_0.txt
AT2026lkm_0.txt

Comments