DRAFT
2026-05-14 15:46:59
Type: Object/s-Data/Analysis
Bibcode: 2026TNSAN.134....1B
DAO and UBC Southern Observatory photometric follow-up of selected transients 2026-III (May 2026)
Authors: D. D. Balam (DAO/NRC), A. C. Boley (University of British Columbia - UBC) and S. Chan (UBC) & A. Schildhorn (UBC)
Source Group: DAO_OTS
Keywords: Photometry
Abstract:
We present (SDSS) g&r filter (DAO) and (Kron-Cousins - V & R) photometric follow up observations of selected optical transients obtained using the 1.82-m Plaskett telescope of the (Dominion Astrophysical Observatory) National Research Council of Canada and the University of British Columbia (Thunderbird) Southern Observatory 0.5-m + CCD telescope during the period of UT 2026 May.

Photometric observations obtained with the 1.82-m Plaskett telescope are differential (SDSS g&r filters) and measured from stars in either the Sloan Digital Sky Survey (Skyserver) or the Pan-STARRS release 1 (PS1) Survey - DR1. Observations obtained with the UBC Southern telescope are in the Kron-Cousins filter system. The photometric observations are contained in an attached table (see below - OTmags_260428.txt).

The transient host galaxy light in our photometric measurement is minimized via one of two methods: Reference images are downloaded from the PanSTARRS image access (Flewelling, H. A., et al.) and are convolved, using the nightly PSF to match our images. The reference is then subtracted from our co-added images. A secondary photometric standard is defined and retained on the subtracted image using a pixel mask. 

A second method involves creating a model galaxy, using the IRAF artdata packages, scaling it to the images and subtracting the host galaxy. The differential photometry  was then performed using Image Reduction and Analysis Facility (IRAF) (Tody, D. 1986, "The IRAF Data Reduction and Analysis System").

Note:  photometric redshifts of presumed host galaxies are marked 'p' and spectroscopic redshifts are marked 's'. All host redshifts are via the SDSS Skyserver.

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 2026iea 09:58:16.781 +27:40:45.48 09:58:16.781 +27:40:45.48 SN Ia 0.083
TNS 2026kyu 18:12:54.411 +11:22:56.95 18:12:54.411 +11:22:56.95 SN Ia 0.0856
TNS 2026lar 18:10:23.176 +45:38:19.84 18:10:23.176 +45:38:19.84
TNS 2026lfd [ATLAS26fdl] 11:48:30.618 +50:02:04.99 11:48:30.606 +50:02:04.84
TNS 2026lhu 14:24:23.100 +25:47:19.64 SN Ia 0.069 14:24:23.100 +25:47:19.64 SN Ia 0.073
TNS 2026ljv 15:03:12.643 +44:22:24.77 SN Ia 0.04 15:03:12.643 +44:22:24.77 SN Ia 0.04
TNS 2026kia 10:53:55.518 -16:06:06.72 SN II 0.014577 MCG -03-28-017 0.014577 10:53:55.518 -16:06:06.72 SN II 0.014577
TNS 2026lkm 14:41:39.027 -37:13:46.68 14:41:39.027 -37:13:46.68 SN Ia 0.028
TNS 2026lqa 12:41:42.770 -17:46:00.00 12:41:42.770 -17:46:00.00
TNS 2026lru 10:23:49.418 -20:57:25.38 MCG -03-27-007 0.026332 10:23:49.563 -20:57:29.52 SN Ia 0.026
TNS 2026mcc 13:33:34.230 -20:38:04.35 13:33:34.230 -20:38:04.35
TNS 2026lnt 15:55:05.718 +01:53:48.70 SN II 0.02 15:55:05.718 +01:53:48.70 SN II 0.02
TNS 2026lxf 15:03:05.190 +22:02:04.10 CV 0 15:03:05.190 +22:02:04.10 CV
TNS 2026mhn 16:44:31.651 -27:15:18.38 16:44:31.651 -27:15:18.38 CV
File Comments
OTmags_260514_0.txt

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