{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:P7OI4QIOSY6GABJTJBBABIEEZG","short_pith_number":"pith:P7OI4QIO","canonical_record":{"source":{"id":"1303.2649","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2013-03-11T19:58:03Z","cross_cats_sorted":[],"title_canon_sha256":"f38c67ce2ec9ba5c26f6e72c3ab3e6cdbdc4e61b7b116cdbff29ad40c1b84920","abstract_canon_sha256":"21a7d4ebf21a4698aa9a70fc451c507dddcfb26fdfe24562dd758b5e15781889"},"schema_version":"1.0"},"canonical_sha256":"7fdc8e410e963c600533484200a084c99cebdf5e70f038dcae5d5c4c071df512","source":{"kind":"arxiv","id":"1303.2649","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1303.2649","created_at":"2026-05-18T01:51:08Z"},{"alias_kind":"arxiv_version","alias_value":"1303.2649v1","created_at":"2026-05-18T01:51:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1303.2649","created_at":"2026-05-18T01:51:08Z"},{"alias_kind":"pith_short_12","alias_value":"P7OI4QIOSY6G","created_at":"2026-05-18T12:27:54Z"},{"alias_kind":"pith_short_16","alias_value":"P7OI4QIOSY6GABJT","created_at":"2026-05-18T12:27:54Z"},{"alias_kind":"pith_short_8","alias_value":"P7OI4QIO","created_at":"2026-05-18T12:27:54Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:P7OI4QIOSY6GABJTJBBABIEEZG","target":"record","payload":{"canonical_record":{"source":{"id":"1303.2649","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2013-03-11T19:58:03Z","cross_cats_sorted":[],"title_canon_sha256":"f38c67ce2ec9ba5c26f6e72c3ab3e6cdbdc4e61b7b116cdbff29ad40c1b84920","abstract_canon_sha256":"21a7d4ebf21a4698aa9a70fc451c507dddcfb26fdfe24562dd758b5e15781889"},"schema_version":"1.0"},"canonical_sha256":"7fdc8e410e963c600533484200a084c99cebdf5e70f038dcae5d5c4c071df512","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:51:08.685632Z","signature_b64":"hjRDT9nttwaUU88iYBEGECPqbfQ+aI0XO3pclVAsOlvuocJORAVy9LXVCY0Pg/ZgSDGYjKMnJ6VzO2Ydma8jAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7fdc8e410e963c600533484200a084c99cebdf5e70f038dcae5d5c4c071df512","last_reissued_at":"2026-05-18T01:51:08.685016Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:51:08.685016Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1303.2649","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:51:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3ZxrPWykxLwWHNUlW/4mueBCz5xLg6fL3BrsTeN456U6NK720em2jc/D5+oa2hGvseb/G4zv7Io5AodBSNOeAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-26T20:34:10.498528Z"},"content_sha256":"4e3b1a864740ef057e76a636272d04ba7bd3df21d51ea2c9aa454fb08bdb580b","schema_version":"1.0","event_id":"sha256:4e3b1a864740ef057e76a636272d04ba7bd3df21d51ea2c9aa454fb08bdb580b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:P7OI4QIOSY6GABJTJBBABIEEZG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A revised estimate of the occurrence rate of terrestrial planets in the habitable zones around kepler m-dwarfs","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"Ravi Kumar Kopparapu","submitted_at":"2013-03-11T19:58:03Z","abstract_excerpt":"Because of their large numbers, low mass stars may be the most abundant planet hosts in our Galaxy. Furthermore, terrestrial planets in the habitable zones (HZs) around M-dwarfs can potentially be characterized in the near future and hence may be the first such planets to be studied. Recently Dressing & Charbonneau(2013) used Kepler data and calculated the frequency of terrestrial planets in the HZ of cool stars to be 0.15^{+0.13}_{-0.06} per star for Earth-size planets (0.5-1.4 R_{Earth}). However, this estimate was derived using the Kasting et al.(1993) HZ limits, which were not valid for st"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1303.2649","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":""},"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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:51:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IN2ywdzKmiF4XiGlOtEOupGSG2/cInG0uvfNlkTAx366Dp6mGW8oJc0bi8ccH/XVz22FMX9WvHUW9NBAuzfaAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-26T20:34:10.498867Z"},"content_sha256":"1d6cf6ccb187e5942cc5924d27e1e3408fdec6e756400d807c1c40a171cfe7e2","schema_version":"1.0","event_id":"sha256:1d6cf6ccb187e5942cc5924d27e1e3408fdec6e756400d807c1c40a171cfe7e2"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/P7OI4QIOSY6GABJTJBBABIEEZG/bundle.json","state_url":"https://pith.science/pith/P7OI4QIOSY6GABJTJBBABIEEZG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/P7OI4QIOSY6GABJTJBBABIEEZG/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-26T20:34:10Z","links":{"resolver":"https://pith.science/pith/P7OI4QIOSY6GABJTJBBABIEEZG","bundle":"https://pith.science/pith/P7OI4QIOSY6GABJTJBBABIEEZG/bundle.json","state":"https://pith.science/pith/P7OI4QIOSY6GABJTJBBABIEEZG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/P7OI4QIOSY6GABJTJBBABIEEZG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:P7OI4QIOSY6GABJTJBBABIEEZG","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"21a7d4ebf21a4698aa9a70fc451c507dddcfb26fdfe24562dd758b5e15781889","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2013-03-11T19:58:03Z","title_canon_sha256":"f38c67ce2ec9ba5c26f6e72c3ab3e6cdbdc4e61b7b116cdbff29ad40c1b84920"},"schema_version":"1.0","source":{"id":"1303.2649","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1303.2649","created_at":"2026-05-18T01:51:08Z"},{"alias_kind":"arxiv_version","alias_value":"1303.2649v1","created_at":"2026-05-18T01:51:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1303.2649","created_at":"2026-05-18T01:51:08Z"},{"alias_kind":"pith_short_12","alias_value":"P7OI4QIOSY6G","created_at":"2026-05-18T12:27:54Z"},{"alias_kind":"pith_short_16","alias_value":"P7OI4QIOSY6GABJT","created_at":"2026-05-18T12:27:54Z"},{"alias_kind":"pith_short_8","alias_value":"P7OI4QIO","created_at":"2026-05-18T12:27:54Z"}],"graph_snapshots":[{"event_id":"sha256:1d6cf6ccb187e5942cc5924d27e1e3408fdec6e756400d807c1c40a171cfe7e2","target":"graph","created_at":"2026-05-18T01:51:08Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"Because of their large numbers, low mass stars may be the most abundant planet hosts in our Galaxy. Furthermore, terrestrial planets in the habitable zones (HZs) around M-dwarfs can potentially be characterized in the near future and hence may be the first such planets to be studied. Recently Dressing & Charbonneau(2013) used Kepler data and calculated the frequency of terrestrial planets in the HZ of cool stars to be 0.15^{+0.13}_{-0.06} per star for Earth-size planets (0.5-1.4 R_{Earth}). However, this estimate was derived using the Kasting et al.(1993) HZ limits, which were not valid for st","authors_text":"Ravi Kumar Kopparapu","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2013-03-11T19:58:03Z","title":"A revised estimate of the occurrence rate of terrestrial planets in the habitable zones around kepler m-dwarfs"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1303.2649","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:4e3b1a864740ef057e76a636272d04ba7bd3df21d51ea2c9aa454fb08bdb580b","target":"record","created_at":"2026-05-18T01:51:08Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"21a7d4ebf21a4698aa9a70fc451c507dddcfb26fdfe24562dd758b5e15781889","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2013-03-11T19:58:03Z","title_canon_sha256":"f38c67ce2ec9ba5c26f6e72c3ab3e6cdbdc4e61b7b116cdbff29ad40c1b84920"},"schema_version":"1.0","source":{"id":"1303.2649","kind":"arxiv","version":1}},"canonical_sha256":"7fdc8e410e963c600533484200a084c99cebdf5e70f038dcae5d5c4c071df512","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7fdc8e410e963c600533484200a084c99cebdf5e70f038dcae5d5c4c071df512","first_computed_at":"2026-05-18T01:51:08.685016Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:51:08.685016Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"hjRDT9nttwaUU88iYBEGECPqbfQ+aI0XO3pclVAsOlvuocJORAVy9LXVCY0Pg/ZgSDGYjKMnJ6VzO2Ydma8jAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:51:08.685632Z","signed_message":"canonical_sha256_bytes"},"source_id":"1303.2649","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4e3b1a864740ef057e76a636272d04ba7bd3df21d51ea2c9aa454fb08bdb580b","sha256:1d6cf6ccb187e5942cc5924d27e1e3408fdec6e756400d807c1c40a171cfe7e2"],"state_sha256":"3f13a756637166931a26378daad3712dc54227a2e4d26dbcd3c168ef9d349ed0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XIP00KhOIPdegKyBmamCNouP5+UDpvH6dFOOVVHZ38zm/DLTmgVusiP9XNJP8wUNlg15NX2brUvhBVYXtKoqAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-26T20:34:10.500687Z","bundle_sha256":"535d6f087050b453efcdaa79580c032d458cfcfb43d0c5120efeb0ac163f7a38"}}