AT 2024ahzi: A Type IIP Supernova Discovered by the LSST Commissioning Camera
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arXiv
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2026
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| author | de Soto, Kaylee Villar, V. Ashley Goldberg, Jared A. Nugent, Anya Dong, Yize Foley, Ryan J. Geron, Tobias Izzo, Luca Murphey, C. Tanner Auchettl, Katie Coulter, David A. de Boer, Thomas Chambers, Kenneth C. Farias, Diego A. Gall, Christa Gao, Hua Hjorth, Jens Hoogendam, Willem B. Jones, David O. Nair, Gauri Narayan, Gautham Rest, Armin Patra, Kishore C. Perkins, Haille M. L. Verrico, Margaret E. Wang, Qinan Wasserman, Amanda R. Zenat, Yossef |
| author_facet | de Soto, Kaylee Villar, V. Ashley Goldberg, Jared A. Nugent, Anya Dong, Yize Foley, Ryan J. Geron, Tobias Izzo, Luca Murphey, C. Tanner Auchettl, Katie Coulter, David A. de Boer, Thomas Chambers, Kenneth C. Farias, Diego A. Gall, Christa Gao, Hua Hjorth, Jens Hoogendam, Willem B. Jones, David O. Nair, Gauri Narayan, Gautham Rest, Armin Patra, Kishore C. Perkins, Haille M. L. Verrico, Margaret E. Wang, Qinan Wasserman, Amanda R. Zenat, Yossef |
| contents | As part of its commissioning, the Vera C. Rubin Observatory observed several fields repeatedly for a month with ComCam, an instrument that uses the same hardware as the LSST camera but covers a smaller field of view. We photometrically classify AT 2024ahzi, a transient discovered by ComCam, as a Type IIP supernova (SN IIP) using both ComCam and DECam photometry. We find that the duration, luminosity, and color of AT 2024ahzi's photometric plateau are all consistent with those from a large sample of SNe II. By comparing its multi-band light curves to SN II models and analytic relations, we place constraints on the SN progenitor, explosion dynamics, and circumstellar environment. We argue that the progenitor has an extended density profile indistinguishable from a slowly accelerating CSM. We discuss how a similar workflow can identify and characterize future Rubin SNe II. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2603_00262 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | AT 2024ahzi: A Type IIP Supernova Discovered by the LSST Commissioning Camera de Soto, Kaylee Villar, V. Ashley Goldberg, Jared A. Nugent, Anya Dong, Yize Foley, Ryan J. Geron, Tobias Izzo, Luca Murphey, C. Tanner Auchettl, Katie Coulter, David A. de Boer, Thomas Chambers, Kenneth C. Farias, Diego A. Gall, Christa Gao, Hua Hjorth, Jens Hoogendam, Willem B. Jones, David O. Nair, Gauri Narayan, Gautham Rest, Armin Patra, Kishore C. Perkins, Haille M. L. Verrico, Margaret E. Wang, Qinan Wasserman, Amanda R. Zenat, Yossef High Energy Astrophysical Phenomena As part of its commissioning, the Vera C. Rubin Observatory observed several fields repeatedly for a month with ComCam, an instrument that uses the same hardware as the LSST camera but covers a smaller field of view. We photometrically classify AT 2024ahzi, a transient discovered by ComCam, as a Type IIP supernova (SN IIP) using both ComCam and DECam photometry. We find that the duration, luminosity, and color of AT 2024ahzi's photometric plateau are all consistent with those from a large sample of SNe II. By comparing its multi-band light curves to SN II models and analytic relations, we place constraints on the SN progenitor, explosion dynamics, and circumstellar environment. We argue that the progenitor has an extended density profile indistinguishable from a slowly accelerating CSM. We discuss how a similar workflow can identify and characterize future Rubin SNe II. |
| title | AT 2024ahzi: A Type IIP Supernova Discovered by the LSST Commissioning Camera |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2603.00262 |