VizieR Online Data Catalog: Follow-up HST obs. of a strong failed SN cand. (Jencson+, 2022)
Abstract
We performed image subtraction with the available archival HST WFC3/UVIS and ACS/WFC images in the F814W filter that overlap with the footprint of our Cycle 26 program observations. For M51, this includes ACS/WFC frames taken from 2005 January 12-22 (PI: S. Beckwith; PID: 10452) and a large campaign consisting of 34 epochs taken between 2016 October 5 and 2017 February 17 to study massive star variability (PI: C. Conroy; PID: 14704; see Conroy+ 2018, J/ApJ/864/111). See Section 3.1.
Following our identification of M51-DS1 as a disappearing star and promising candidate for a failed SN, we began examining the wealth of multiband, archival HST imaging, including the ACS/WFC F814W images described above and the complimentary F435W, F555W, and F658N (2005) and F606W (2016-2017) from the same programs. There is also coverage with WFC3/IR (0.13"/pixels) in F110W and F128N (Paβ) taken on 2012 September 4 (PI: J. Koda; PID: 12490). Of the available WFC3/UVIS observations, we use only the 2012 observations in the redder F673N and F689M filters (PI: K. Kuntz; PID: 12762). Similarly for WFPC2, we consider only the F814W images from 1995 (PI: R. Kirshner; PID: 5777) and 2008 (PI: M. Meixner; PID: 11229). We were also awarded an HST Cycle 28 mid-cycle proposal for additional deep, optical, and near-IR imaging of the field (PI: J. Jencson; PID: 16508). The images for this program were obtained with ACS/WFC in F606W and F814W (total exposure time of 2208s for each filter) on 2021 April 28-29 and with WFC3/IR in F110W and F160W on 2021 June 6 (1200s exposure per filter). See Section 3.3. We obtained follow-up imaging in the near-IR with the MMT and Magellan Infrared Spectrograph (MMIRS, 0.2" pixels) on the 6.5m MMT Observatory telescope on Mt. Hopkins at the Smithsonian's Fred Lawrence Whipple Observatory. We obtained JHKs imaging over a two-night run on UT 2021 February 23 and 24. We also obtained J- and Ks-band imaging with the Near-Infrared Imager (NIRI) on the 8m Gemini-N Telescope on Maunakea through a Directors Discretionary Time program (PI: J. Jencson; PID: GN-2021A-DD-101). The images were obtained with the f/6 camera (0.117" pixels) over multiple nights from 2021 April 1-6. We also downloaded NIRI JHK images from the Gemini Observatory archive covering the location of M51-DS1 and taken in a similar manner with the same camera setup on 2005 June 27 (PI: S. Smartt; PID: GN-2005A-Q-49). Lastly, near-IR Ks-band observations were obtained on 2022 January 22 at the LBT Observatory. See Section 3.3.2. (1 data file).- Publication:
-
VizieR Online Data Catalog
- Pub Date:
- March 2024
- Bibcode:
- 2024yCat..19300081J
- Keywords:
-
- Stars: giant;
- Photometry: HST;
- Infrared sources