DRAFT
2023-11-08 18:44:18
Type: Object/s-Data/Analysis
Bibcode: 2023TNSAN.294....1B
DAO Photometric Follow Up of selected Optical Transients
Authors: D. D. Balam (Dominion Astrophysical Observatory, National Research Council of Canada) and M R. Kendurkar (GSNST)
Keywords: Surveys, Photometry, Transient, Nova, Optical
Abstract:
Here we present multi-band photometric follow up observations of 9 optical transients using 1.83-m Plaskett Telescope + CCD at Dominion Astrophysical Observatory of the National Research Council of Canada.

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").

 

 

        Name                  Date             g     host_g       z  
      2023vou         2023-10-26.166     non-detection     ---------   ---------
      2023voz         2023-10-26.107           17.33     ---------   ---------
      2023voz         2023-10-27.138           17.30     ---------   ---------
      2023vqn         2023-10-26.132           17.86     16.17   0.050
      2023vka         2023-10-27.170           19.82     21.34   ---------
      2023vod         2023-10-27.260           19.79     ---------   0.032
      2023vpd         2023-10-27.214           18.42     18.46   0.063
      2023vqv         2023-10-27.108           19.44     21.73   0.357
      2023vuh         2023-10-27.485     non-detection    ----------   ---------

 

Several different secondary standards were used from SDSS DR16 (Ahumada+, 2020) and PS1 Survey DR1 (Chambers+, 2016) to perform differential photometry using Image Reduction and Analysis Facility. 

*All the z values are photoZ (KD-tree method) from Sloan Digtial Sky Survey (SDSS) Sky Server.

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 2023vou 22:46:41.785 +50:10:37.32 22:46:41.785 +50:10:37.32
TNS 2023voz 18:46:55.196 +32:58:01.79 WISEA J184654.84+325758.3 18:46:55.196 +32:58:01.79
TNS 2023vqn 22:52:31.722 +18:14:06.48 SN Ia 0.07 22:52:31.726 +18:14:06.46 SN Ia 0.07
TNS 2023vka 22:22:18.043 +30:48:29.02 22:22:18.043 +30:48:29.02
TNS 2023vod 22:55:52.398 +56:22:44.62 ZOAG G107.39-02.97 0.02228 22:55:52.398 +56:22:44.62
TNS 2023vpd 22:40:12.907 +19:30:24.54 SN Ia 0.034 SDSS J224012.90+193024.7 22:40:12.907 +19:30:24.54 SN Ia 0.034
TNS 2023vqv 17:49:17.626 +58:46:16.39 SDSS J174917.52+584616.5 17:49:17.626 +58:46:16.39
TNS 2023vuh 07:12:33.443 +46:13:20.97 07:12:33.443 +46:13:20.97

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