DRAFT
2026-06-07 03:16:26
Type: Object/s-Data/Analysis
DAO Photometric follow up of selected transients
Authors: M R. Kendurkar (GSNST) and D. D. Balam (Dominion Astrophysical Observatory, National Research Council of Canada)
Source Group: GSNST
Keywords: Surveys, Photometry, Transient, Nova, Optical
Abstract:
We present (SDSS) g&r filter 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 during the period of UT 2025 January.

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. The photometric observations are contained in an attached table (see below - OT_mag_2501.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 2025acf 12:17:21.813 +03:58:26.65 12:17:21.813 +03:58:26.65
TNS 2025aec 09:07:03.220 +38:19:34.98 SN Ia 0.055 09:07:03.220 +38:19:34.98 SN Ia 0.055
TNS 2025acp 13:23:11.016 +32:10:41.37 SN II 0.042 SDSS J132311.26+321043.3 13:23:11.016 +32:10:41.37 SN II 0.042
TNS 2025aet 06:51:06.317 +19:46:40.29 SN Ia 0.07 06:51:06.317 +19:46:40.29 SN Ia 0.07
TNS 2025acv 08:39:56.604 +19:38:40.13 SN Ia 0.032709 08:39:56.604 +19:38:40.13 SN Ia 0.032709
TNS 2025aeg 10:35:25.567 +16:33:26.80 10:35:25.567 +16:33:26.80
TNS 2025ra 12:41:30.961 +37:23:20.57 12:41:30.961 +37:23:20.57
TNS 2025re 13:31:15.557 +29:22:16.30 13:31:15.557 +29:22:16.30
TNS 2025uc 09:15:43.983 +15:43:55.39 09:15:43.983 +15:43:55.39
TNS 2025wl 08:03:11.614 +05:11:06.06 SN Ia 0.1 08:03:11.614 +05:11:06.06 SN Ia 0.1
TNS 2025acu 10:33:26.138 +01:50:29.11 SN Ia 0.029 10:33:26.138 +01:50:29.11 SN Ia 0.029
TNS 2025aeb 13:14:41.041 +19:58:19.59 13:14:41.041 +19:58:19.59
TNS 2025hr 12:34:20.039 +05:04:46.85 SN Ia 0.075 12:34:20.039 +05:04:46.85 SN Ia 0.075
TNS 2025lz 06:01:21.070 +45:32:49.83 06:01:21.070 +45:32:49.83
TNS 2025nn 07:17:39.340 +43:49:03.12 SN Ia-91bg-like 0.05 07:17:39.340 +43:49:03.12 SN Ia-91bg-like 0.05
TNS 2025ps 06:54:45.564 +26:37:47.58 06:54:45.564 +26:37:47.58
TNS 2025qk 03:43:23.083 +45:15:50.10 WISEA J034322.28+451538.0 03:43:23.083 +45:15:50.10

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