DRAFT
2024-08-03 18:14:38
Type: Object/s-Data/Analysis
Bibcode: 2024TNSAN.213....1B
DAO photometric follow-up of selected transients
Authors: D. D. Balam (Dominion Astrophysical Observatory, National Research Council of Canada) & Eric Hess (RAO/University of Calgary)
Source Group: DAO_OTS
Keywords: Photometry
Abstract:
Here we present 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.

Photometric observations obtained with the 1.82-m Plaskett telescope are differential (SDSS gri filters) and measured from stars in either the Sloan Digital Sky Survey (Skyserver) or the Pan-STARRS release 1 (PS1) Survey - DR1.

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").

Object UT g (SDSS) g -r presumed host redshift
2024qpl 2024 08 02.232 19.39 (0.02) -0.25 (0.07) SDSS J163252.08+293030.4 0.305 p
2024qte 2024 08 03.290 19.88 (0.03) +0.30 (0.04) WISEA J172248.40+371453.3 -----
2024qtp 2024 08 03.354 18.91 (0.02) +0.05 (0.06) WISEA J205629.67+193748.4 0.094 s
2024quf 2024 08 03.416 20.29 (0.05) ----- WISEA J222503.51+413245.1 -----
2024qui 2024 08 03.478 17.86 (0.06) ----- M31 -0.001 s
2024qwi 2024 08 03.228 19.45 (0.03) -0.11 (0.03) SDSS J165440.51+404451.3 0.097 s

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 2024qpl 16:32:51.965 +29:30:30.90 16:32:51.965 +29:30:30.90
TNS 2024qte 17:22:48.407 +37:14:53.79 17:22:48.407 +37:14:53.79
TNS 2024qtp 20:56:29.586 +19:37:48.33 20:56:29.586 +19:37:48.33
TNS 2024quf 22:25:03.578 +41:32:43.41 22:25:03.578 +41:32:43.41
TNS 2024qui 00:42:51.879 +41:15:50.97 00:42:51.799 +41:15:51.51
TNS 2024qwi 16:54:40.510 +40:44:37.04 16:54:40.480 +40:44:37.03 SN Ia 0.097427

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