DRAFT
2026-04-12 15:19:52
Type: Object/s-Data/Analysis
Bibcode: 2026TNSAN..99....1B
DAO and UBC Southern Observatory photometric follow-up of selected transients
Authors: D. D. Balam (DAO/NRC), A. C. Boley (University of British Columbia - UBC), A. Schildborn (UBC) and S. Chan (UBC)
Source Group: DAO_OTS
Keywords: Photometry
Abstract:
We present (SDSS) g&r filter (DAO) and (Kron-Cousins - UC) 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 March through April.

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_260412.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 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 2026icu 07:36:32.513 +50:19:24.81 07:36:32.513 +50:19:24.81
TNS 2026icw 11:28:54.874 +21:06:30.69 11:28:54.874 +21:06:30.69 SN Ia 0.07907
TNS 2026iea 09:58:16.781 +27:40:45.48 09:58:16.781 +27:40:45.48
TNS 2026iei 11:27:42.580 +54:15:47.06 11:27:42.580 +54:15:47.06 SN Ia 0.049
TNS 2026ies 16:23:37.422 +39:12:11.82 16:23:37.419 +39:12:11.85 SN II 0.02
TNS 2026ign 16:01:19.680 +44:58:06.20 16:01:19.680 +44:58:06.20
TNS 2026ihi 11:45:04.582 +19:58:15.60 SN II 0.017 11:45:04.582 +19:58:15.60 SN II 0.017
TNS 2026iho 14:49:19.404 +33:17:41.02 14:49:19.404 +33:17:41.02 SN Ia 0.088
TNS 2026iih 07:13:47.698 +58:48:26.60 07:13:47.698 +58:48:26.60
TNS 2026ijm 12:35:13.975 +41:45:24.96 12:35:13.975 +41:45:24.96
TNS 2026imm 10:30:43.190 +40:16:01.97 10:30:43.190 +40:16:01.97
TNS 2026isc 16:35:34.990 +26:38:38.36 16:35:34.990 +26:38:38.36 SN Ia 0.057498
TNS 2026iuk 10:01:10.740 +29:37:27.72 10:01:10.740 +29:37:27.72
TNS 2026iuq 14:24:08.131 +22:56:14.71 14:24:08.131 +22:56:14.71
TNS 2026fog 10:15:46.390 -05:25:25.30 10:15:46.390 -05:25:25.30
TNS 2026frd 08:02:41.345 +09:17:30.12 08:02:41.345 +09:17:30.12
TNS 2026idf 15:33:21.782 -41:04:00.27 15:33:21.782 -41:04:00.27 CV
TNS 2026iur 09:54:32.050 -01:17:25.84 SN Ia 0.02057 NGC 3047A 0.020531 09:54:32.050 -01:17:25.84 SN Ia 0.02057
File Comments
OT_260412_0.txt

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