AstroNote 2024-223

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DRAFT
2024-08-19 22:13:59
Type: Object/s-Data/Analysis
DAO photometric follow-up of selected transients (Aug. 2024)
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 during the Aug. 2024 dark run.
Object UT g (SDSS) g-r presumed host redshift
2024rjs 2024 08 07.211 18.59 (0.01) +0.57 (0.02) WISEA J181044.23+370142.7 0.94 s
2024rjw 2024 08 07.336 18.70 (0.03) +0.22 (0.05) WISEA J210309.52+204523.5 0.025 s
2024rke 2024 08 07.429 19.07 (0.02) +0.39 (0.03) SDSS J221350.01+065147.3 0.06 s
2024rlw 2024 08 07.274 19.42 (0.04) -------- WISEA J204647.84+132357.2 -----
2024rjb 2024 08 08.273 19.79 (0.06) +0.88 (0.07) WISEA J200619.77+220054.8 -----
2024rnj 2024 08 08.336 19.49 (0.03) +0.52 (0.03) SDSS J212914.65+180358.1 0.170 p
2024rcc 2024 08 09.461 19.67 (0.08) +0.63 (0.10) SDSS J233011.21+182611.9 0.59 p
2024rox 2024 08 09.398 17.68 (0.01) -0.09 (0.02) SDSS J220022.03+070444.9 -----
2024rqg 2024 08 09.211 20.38 (0.07) ------ WISEA J182213.24+394605.2 -----
2024ryv 2024 08 15.453 18.47 (0.01) -0.04 (0.02) SDSS J002528.75+201415.5 0.015 s
2024sck 2024 08 15.344 18.65 (0.01) +0.69 (0.02) WISEA J201437.84+564633.1 0.080 s

 

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").

Note:  photometric redshifts are marked 'p' and spectroscopic redshifts are marked 's'. All host redshifts are via the SDSS Skyserver.

 

 

Show current TNS values
CatalogNameReported RAReported DECReported Obj-TypeReported RedshiftHost NameHost RedshiftRemarksTNS RATNS DECTNS Obj-TypeTNS Redshift
TNS2024rjs18:10:44.307+37:01:42.9418:10:44.307+37:01:42.94
TNS2024rjw21:03:10.107+20:45:02.58SN Ic-BL0.0221:03:10.107+20:45:02.58SN Ic0.02
TNS2024rke22:13:50.054+06:51:46.81SN Ia0.0622:13:50.054+06:51:46.81SN Ia0.06
TNS2024rlw20:46:48.130+13:23:54.1420:46:48.130+13:23:54.14
TNS2024rjb20:06:20.137+22:00:55.7320:06:20.137+22:00:55.73
TNS2024rnj21:29:14.647+18:03:58.8821:29:14.647+18:03:58.88
TNS2024rcc23:30:11.207+18:26:12.5423:30:11.207+18:26:12.54SN Ia-91T-like0.14
TNS2024rox22:00:22.026+07:04:44.5122:00:22.026+07:04:44.51
TNS2024rqg18:22:13.359+39:46:05.8518:22:13.359+39:46:05.85
TNS2024ryv00:25:29.960+20:14:34.51SN IIP0.01500:25:29.960+20:14:34.57SN IIP0.015
TNS2024sck20:14:38.648+56:46:29.81SN Ia0.0820:14:38.648+56:46:29.81SN Ia0.080049