{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2008:E34G2PS24FXKSQZ2WZ6VGKWZP4","short_pith_number":"pith:E34G2PS2","schema_version":"1.0","canonical_sha256":"26f86d3e5ae16ea9433ab67d532ad97f3d9fffa1c592bda39a36369e769bc079","source":{"kind":"arxiv","id":"0812.4420","version":2},"attestation_state":"computed","paper":{"title":"The very short supersoft X-ray state of the classical nova M31N 2007-11a","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"D. H. Hartmann, F. Haberl, G. G. Williams, G. Sala, J. Greiner, M. Della Valle, M. Henze, M. Hernanz, M. J. Freyberg, P. Milne, V. Burwitz, W. Pietsch","submitted_at":"2008-12-23T16:25:44Z","abstract_excerpt":"Short supersoft X-ray source (SSS) states (durations < 100 days) of classical novae (CNe) indicate massive white dwarfs that are candidate progenitors of supernovae type Ia. We carry out a dedicated optical and X-ray monitoring program of CNe in the bulge of M 31. We discovered M31N 2007-11a and determined its optical and X-ray light curve. We used the robotic Super-LOTIS telescope to obtain the optical data and XMM-Newton and Chandra observations to discover an X-ray counterpart to that nova. Nova M31N 2007-11a is a very fast CN, exhibiting a very short SSS state with an appearance time of 6-"},"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":"0812.4420","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-12-23T16:25:44Z","cross_cats_sorted":[],"title_canon_sha256":"f2462ef0ff868b2849c9f2e060fdce2b6516ceffd0a94a905be31da1c8a6d953","abstract_canon_sha256":"9e825188a3d9284d7c0af6c7f9f00486d12264bafd95507a9a92d083a054312c"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:15:03.917461Z","signature_b64":"KfjXZBj/2MrrdsxE3c878QSKHgXKkKw2H1ajIIPYlSEQ9Q0fcH5eNDdFR0XFArexjzFSLaPsPD6yqF8xd15qCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"26f86d3e5ae16ea9433ab67d532ad97f3d9fffa1c592bda39a36369e769bc079","last_reissued_at":"2026-05-18T02:15:03.917088Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:15:03.917088Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The very short supersoft X-ray state of the classical nova M31N 2007-11a","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"D. H. Hartmann, F. Haberl, G. G. Williams, G. Sala, J. Greiner, M. Della Valle, M. Henze, M. Hernanz, M. J. Freyberg, P. Milne, V. Burwitz, W. Pietsch","submitted_at":"2008-12-23T16:25:44Z","abstract_excerpt":"Short supersoft X-ray source (SSS) states (durations < 100 days) of classical novae (CNe) indicate massive white dwarfs that are candidate progenitors of supernovae type Ia. We carry out a dedicated optical and X-ray monitoring program of CNe in the bulge of M 31. We discovered M31N 2007-11a and determined its optical and X-ray light curve. We used the robotic Super-LOTIS telescope to obtain the optical data and XMM-Newton and Chandra observations to discover an X-ray counterpart to that nova. Nova M31N 2007-11a is a very fast CN, exhibiting a very short SSS state with an appearance time of 6-"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0812.4420","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"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":"0812.4420","created_at":"2026-05-18T02:15:03.917146+00:00"},{"alias_kind":"arxiv_version","alias_value":"0812.4420v2","created_at":"2026-05-18T02:15:03.917146+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0812.4420","created_at":"2026-05-18T02:15:03.917146+00:00"},{"alias_kind":"pith_short_12","alias_value":"E34G2PS24FXK","created_at":"2026-05-18T12:25:57.157939+00:00"},{"alias_kind":"pith_short_16","alias_value":"E34G2PS24FXKSQZ2","created_at":"2026-05-18T12:25:57.157939+00:00"},{"alias_kind":"pith_short_8","alias_value":"E34G2PS2","created_at":"2026-05-18T12:25:57.157939+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/E34G2PS24FXKSQZ2WZ6VGKWZP4","json":"https://pith.science/pith/E34G2PS24FXKSQZ2WZ6VGKWZP4.json","graph_json":"https://pith.science/api/pith-number/E34G2PS24FXKSQZ2WZ6VGKWZP4/graph.json","events_json":"https://pith.science/api/pith-number/E34G2PS24FXKSQZ2WZ6VGKWZP4/events.json","paper":"https://pith.science/paper/E34G2PS2"},"agent_actions":{"view_html":"https://pith.science/pith/E34G2PS24FXKSQZ2WZ6VGKWZP4","download_json":"https://pith.science/pith/E34G2PS24FXKSQZ2WZ6VGKWZP4.json","view_paper":"https://pith.science/paper/E34G2PS2","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=0812.4420&json=true","fetch_graph":"https://pith.science/api/pith-number/E34G2PS24FXKSQZ2WZ6VGKWZP4/graph.json","fetch_events":"https://pith.science/api/pith-number/E34G2PS24FXKSQZ2WZ6VGKWZP4/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/E34G2PS24FXKSQZ2WZ6VGKWZP4/action/timestamp_anchor","attest_storage":"https://pith.science/pith/E34G2PS24FXKSQZ2WZ6VGKWZP4/action/storage_attestation","attest_author":"https://pith.science/pith/E34G2PS24FXKSQZ2WZ6VGKWZP4/action/author_attestation","sign_citation":"https://pith.science/pith/E34G2PS24FXKSQZ2WZ6VGKWZP4/action/citation_signature","submit_replication":"https://pith.science/pith/E34G2PS24FXKSQZ2WZ6VGKWZP4/action/replication_record"}},"created_at":"2026-05-18T02:15:03.917146+00:00","updated_at":"2026-05-18T02:15:03.917146+00:00"}