DRAFT
2025-12-17 03:08:02
Type: Object/s-Discovery/Classification
Bibcode: 2025TNSAN.338....1S
Discovery of 4 Supernova Candidates (zhost = 0.35 - 2.92) in GOODS-S using JWST Program 3215 and OASIS JWST/NIRCam Images
Authors: Magdalena Sammut (University of Arizona), Christa DeCoursey (University of Arizona), Eiichi Egami (University of Arizona), Tobias Looser (Harvard), Francesco D’Eugenio (University of Cambridge), Daniel Eisenstein (Harvard), Benjamin Johnson (Harvard)
Abstract:
We report 4 supernova candidates with magnitudes down to ~30.2 AB mag in the GOODS-S field hosted by galaxies with redshifts z=0.342, z~2.55, z~2.92, and one of unknown redshift. We found these sources by performing an archival transient search in the overlapping NIRCam data obtained from JWST program 3215 (PI: Eisenstein) in October 2023 and from the OASIS program (PI: Looser; PID: 5997) in October 2024 collected with the F182M, F210M, and F335M filters.

JWST program 3215 (PI: Eisenstein) collected data with the NIRCam F182M, F210M, and F335M filters in October 2023. The Observing All Phases of StochastIc Star formation (OASIS) program (PI: Looser; PID: 5997) collected data from these same filters one year later, in October 2024. These surveys, both conducted in the GOODS-S field, have ~ 2 arcmin2 of overlapping area and thus allowed for an archival transient search.

We created difference images by subtracting the NIRCam images for each common filter collected by these programs and investigated the overlapping regions for transients via visual inspection and by running DAOStarFinder over the difference images and performing signal-to-noise cuts. We performed aperture photometry to measure the transients' apparent magnitudes.

  We report one supernova candidate that first appeared in the program 3215 data (epoch1) and 3 supernova candidates that first appeared in the OASIS data (epoch2), with magnitudes down to ~30.2 AB mag. We associated 3 of these with nearby host galaxies with redshifts of z=0.342, z~2.55, and z~2.92. Notably, AT 2024aihp belongs to a faint host galaxy for which there is no redshift information available.

  The attached images show the 2023 images (program 3215), 2024 images (OASIS; program 5997), difference images, and three-color images for each transient.

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 2024aihp 03:32:16.024 -27:51:42.91 03:32:16.024 -27:51:42.91
TNS 2024aiho 03:32:20.346 -27:52:23.39 OASIS+53.08446-27.87283 0.35 03:32:20.346 -27:52:23.39
TNS 2023aeex 03:32:18.269 -27:51:34.89 OASIS+53.07606-27.85979 2.92 03:32:18.269 -27:51:34.89
TNS 2024aihn 03:32:23.084 -27:50:56.16 OASIS+53.09631-27.84909 2.55 03:32:23.084 -27:50:56.16
File Comments
AT 2024aiho_0.png
AT_2023aeex_0.png
AT_2024aihn_0.png
AT_2024aihp_0.png

Comments