DRAFT
2023-11-20 23:17:00
Type: Object/s-Data/Analysis
Bibcode: 2023TNSAN.316....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)
Source Group: GSNST
Keywords: Time-domain, Surveys, Methods, Photometry, Transient, Cataclysmic Variable, Supernova, Optical
Abstract:
Here we present Sloan g' band photometric follow up observations of 8 optical transients using 1.82-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_mag host_g host_z
       2023xnt            2023-11-15.179      18.75     17.65   0.113
       2023xrq            2023-11-15.117      19.17     17.64   0.117
       2023xrr            2023-11-15.086      19.52     18.63   0.077
       2023xtf            2023-11-17.513      18.39     17.34   0.035
       2023xum            2023-11-18.281      17.33     no host    CV?
       2023xut            2023-11-18.180      19.35     20.00   0.098
       2023xxr            2023-11-18.311      19.19      star    CV?
       2023xya            2023-11-18.086      19.76     19.08   0.118

 

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. 

*z values are photoZ (KD-tree method) and spectrscopic z from Sloan Digtial Sky Survey (SDSS) Sky Server. * host_g magnitudes are also derived 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 2023xnt 23:28:50.990 +11:05:15.92 SDSS J232851.05+110518.2 23:28:50.990 +11:05:15.92
TNS 2023xrq 23:00:00.174 +12:45:23.79 SDSS J230000.47+124525.8 0.1167913 23:00:00.174 +12:45:23.79
TNS 2023xrr 22:44:49.536 +16:14:57.09 22:44:49.536 +16:14:57.09
TNS 2023xtf 07:37:36.141 +38:31:02.19 SN Ia 0.036 07:37:36.144 +38:31:02.01 SN Ia 0.036
TNS 2023xum 03:57:03.001 +35:59:38.27 03:57:03.006 +35:59:38.24
TNS 2023xut 22:42:52.360 +12:46:11.94 SDSS J224252.38+124609.2 22:42:52.363 +12:46:11.86
TNS 2023xxr 05:07:34.260 +25:03:05.34 05:07:34.260 +25:03:05.34
TNS 2023xya 22:15:01.458 +22:12:35.83 22:15:01.458 +22:12:35.83

Comments