{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2024:NTZZFJFRHUL6RUPX2GPVDQMI4L","short_pith_number":"pith:NTZZFJFR","schema_version":"1.0","canonical_sha256":"6cf392a4b13d17e8d1f7d19f51c188e2dd99d0d996381dfc1f3532bf8f3f7bfb","source":{"kind":"arxiv","id":"2406.02498","version":1},"attestation_state":"computed","paper":{"title":"The story of SN 2021aatd -- a peculiar 1987A-like supernova with an early-phase luminosity excess","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.SR","authors_text":"A. Bostroem, A. P\\'al, A. P. Nagy, C. McCully, C. Pellegrino, D. A. Howell, D. B\\'anhidi, D. Hiramatsu, E. Berger, E. Padilla Gonzalez, G. Terreran, I. Arcavi, I. B. B\\'ir\\'o, I. Cs\\'anyi, J. Farah, J. Rho, J. Vink\\'o, M. Newsome, P. Blanchard, P. Sz\\'ekely, R. K\\\"onyves-T\\'oth, S. Gomez, T. Szalai","submitted_at":"2024-06-04T17:16:32Z","abstract_excerpt":"There is a growing number of peculiar events that cannot be assigned to any of the main supernova (SN) classes. SN 1987A and a handful of similar objects, thought to be explosive outcomes of blue supergiant stars, belong to them: while their spectra closely resemble those of H-rich (IIP) SNe, their light-curve (LC) evolution is very different. Here we present the detailed photometric and spectroscopic analysis of SN 2021aatd, a peculiar Type II explosion: while its early-time evolution resembles that of the slowly evolving, double-peaked SN 2020faa (however, at a lower luminosity scale), after"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"2406.02498","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2024-06-04T17:16:32Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"b0a1bbbd505708e3550d3b15b3a062f63ca66450fcb7d9871e4b35beaf618801","abstract_canon_sha256":"bd3a39a0e46969cc3c06fe1a08306ddc6c411e12e7575196071042aca3db8ae0"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T09:11:14.778234Z","signature_b64":"GQjSP8GZt5PZ9uD2vQB8/JACE194SANC9uWsgiN9sv5A4eMghEWguEIH/5aMT7Tg08cGLKtnwe/hwNEpZSB1AA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6cf392a4b13d17e8d1f7d19f51c188e2dd99d0d996381dfc1f3532bf8f3f7bfb","last_reissued_at":"2026-07-05T09:11:14.777672Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T09:11:14.777672Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The story of SN 2021aatd -- a peculiar 1987A-like supernova with an early-phase luminosity excess","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.SR","authors_text":"A. Bostroem, A. P\\'al, A. P. Nagy, C. McCully, C. Pellegrino, D. A. Howell, D. B\\'anhidi, D. Hiramatsu, E. Berger, E. Padilla Gonzalez, G. Terreran, I. Arcavi, I. B. B\\'ir\\'o, I. Cs\\'anyi, J. Farah, J. Rho, J. Vink\\'o, M. Newsome, P. Blanchard, P. Sz\\'ekely, R. K\\\"onyves-T\\'oth, S. Gomez, T. Szalai","submitted_at":"2024-06-04T17:16:32Z","abstract_excerpt":"There is a growing number of peculiar events that cannot be assigned to any of the main supernova (SN) classes. SN 1987A and a handful of similar objects, thought to be explosive outcomes of blue supergiant stars, belong to them: while their spectra closely resemble those of H-rich (IIP) SNe, their light-curve (LC) evolution is very different. Here we present the detailed photometric and spectroscopic analysis of SN 2021aatd, a peculiar Type II explosion: while its early-time evolution resembles that of the slowly evolving, double-peaked SN 2020faa (however, at a lower luminosity scale), after"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2406.02498","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2406.02498/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"aliases":[{"alias_kind":"arxiv","alias_value":"2406.02498","created_at":"2026-07-05T09:11:14.777747+00:00"},{"alias_kind":"arxiv_version","alias_value":"2406.02498v1","created_at":"2026-07-05T09:11:14.777747+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2406.02498","created_at":"2026-07-05T09:11:14.777747+00:00"},{"alias_kind":"pith_short_12","alias_value":"NTZZFJFRHUL6","created_at":"2026-07-05T09:11:14.777747+00:00"},{"alias_kind":"pith_short_16","alias_value":"NTZZFJFRHUL6RUPX","created_at":"2026-07-05T09:11:14.777747+00:00"},{"alias_kind":"pith_short_8","alias_value":"NTZZFJFR","created_at":"2026-07-05T09:11:14.777747+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/NTZZFJFRHUL6RUPX2GPVDQMI4L","json":"https://pith.science/pith/NTZZFJFRHUL6RUPX2GPVDQMI4L.json","graph_json":"https://pith.science/api/pith-number/NTZZFJFRHUL6RUPX2GPVDQMI4L/graph.json","events_json":"https://pith.science/api/pith-number/NTZZFJFRHUL6RUPX2GPVDQMI4L/events.json","paper":"https://pith.science/paper/NTZZFJFR"},"agent_actions":{"view_html":"https://pith.science/pith/NTZZFJFRHUL6RUPX2GPVDQMI4L","download_json":"https://pith.science/pith/NTZZFJFRHUL6RUPX2GPVDQMI4L.json","view_paper":"https://pith.science/paper/NTZZFJFR","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2406.02498&json=true","fetch_graph":"https://pith.science/api/pith-number/NTZZFJFRHUL6RUPX2GPVDQMI4L/graph.json","fetch_events":"https://pith.science/api/pith-number/NTZZFJFRHUL6RUPX2GPVDQMI4L/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/NTZZFJFRHUL6RUPX2GPVDQMI4L/action/timestamp_anchor","attest_storage":"https://pith.science/pith/NTZZFJFRHUL6RUPX2GPVDQMI4L/action/storage_attestation","attest_author":"https://pith.science/pith/NTZZFJFRHUL6RUPX2GPVDQMI4L/action/author_attestation","sign_citation":"https://pith.science/pith/NTZZFJFRHUL6RUPX2GPVDQMI4L/action/citation_signature","submit_replication":"https://pith.science/pith/NTZZFJFRHUL6RUPX2GPVDQMI4L/action/replication_record"}},"created_at":"2026-07-05T09:11:14.777747+00:00","updated_at":"2026-07-05T09:11:14.777747+00:00"}