{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:I7UYL3XLHLTMLVDAPKIN7VGXOX","short_pith_number":"pith:I7UYL3XL","canonical_record":{"source":{"id":"0911.0936","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-11-04T21:39:16Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"90ab8df3e58f5e40eaac2a8ce1d7a683511af77a99611c74405ecf9052450b53","abstract_canon_sha256":"a8f43330394d2e1ef9b191e4e825014400e291485973add907be11b38893d6ef"},"schema_version":"1.0"},"canonical_sha256":"47e985eeeb3ae6c5d4607a90dfd4d775d29b8420fe08c4e28adf1bf073d4d51f","source":{"kind":"arxiv","id":"0911.0936","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0911.0936","created_at":"2026-05-18T02:34:11Z"},{"alias_kind":"arxiv_version","alias_value":"0911.0936v1","created_at":"2026-05-18T02:34:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0911.0936","created_at":"2026-05-18T02:34:11Z"},{"alias_kind":"pith_short_12","alias_value":"I7UYL3XLHLTM","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_16","alias_value":"I7UYL3XLHLTMLVDA","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_8","alias_value":"I7UYL3XL","created_at":"2026-05-18T12:26:00Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:I7UYL3XLHLTMLVDAPKIN7VGXOX","target":"record","payload":{"canonical_record":{"source":{"id":"0911.0936","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-11-04T21:39:16Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"90ab8df3e58f5e40eaac2a8ce1d7a683511af77a99611c74405ecf9052450b53","abstract_canon_sha256":"a8f43330394d2e1ef9b191e4e825014400e291485973add907be11b38893d6ef"},"schema_version":"1.0"},"canonical_sha256":"47e985eeeb3ae6c5d4607a90dfd4d775d29b8420fe08c4e28adf1bf073d4d51f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:34:11.901696Z","signature_b64":"W/E7DKSmsOH/sVt/G+28d85kEFFCLnqxK/bMUf8nAwd6wh2k8H1ide2IW/pUIGmK0FbVZ0EMqaNSX4tK34BNBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"47e985eeeb3ae6c5d4607a90dfd4d775d29b8420fe08c4e28adf1bf073d4d51f","last_reissued_at":"2026-05-18T02:34:11.901288Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:34:11.901288Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0911.0936","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":"2026-05-18T02:34:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9bpVOPgsI5TLoH0wqGNKToxrGbFfiQUpInK/j0fOxMsCUcTkgooA3y3Gz6lRbqORHBWkEcGHhPrLQQOsibwRBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T05:26:16.463599Z"},"content_sha256":"7e90eee641455f2138f637cfbc9f5efc7805dcef4b96b1094d85611015fb8ae2","schema_version":"1.0","event_id":"sha256:7e90eee641455f2138f637cfbc9f5efc7805dcef4b96b1094d85611015fb8ae2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:I7UYL3XLHLTMLVDAPKIN7VGXOX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Spitzer Search for Substellar Companions to Low Mass White Dwarfs","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"B. McLeod, Mukremin Kilic, Warren R. Brown","submitted_at":"2009-11-04T21:39:16Z","abstract_excerpt":"The formation scenarios for single low-mass (M < 0.45 Msol) white dwarfs include enhanced mass loss from a metal-rich progenitor star or a common envelope phase of a solar-like star with a close-in massive planet or a brown dwarf. Both scenarios suggest that low-mass white dwarfs may have planets. Here, we present a Spitzer IRAC search for substellar and planetary mass companions to 14 low-mass white dwarfs. One of our targets, HS 1653+7753, displays near- and mid-infrared flux excess. However, follow-up MMT observations show that this excess is due to a nearby resolved source, which is mostly"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0911.0936","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":"2026-05-18T02:34:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vYMZoXBD5E/w9csYTnXdwuqmdfD/MXbcmYKyyDZ8R2u0Lz9Wo26CYKMWN0+MY3Co5b5r3Iln2pgA1Agw1ma3BA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T05:26:16.463949Z"},"content_sha256":"051e0448f800035056c41d3a85802dacb608a848a329fd5fdfbca619559c120a","schema_version":"1.0","event_id":"sha256:051e0448f800035056c41d3a85802dacb608a848a329fd5fdfbca619559c120a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/I7UYL3XLHLTMLVDAPKIN7VGXOX/bundle.json","state_url":"https://pith.science/pith/I7UYL3XLHLTMLVDAPKIN7VGXOX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/I7UYL3XLHLTMLVDAPKIN7VGXOX/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":"2026-06-02T05:26:16Z","links":{"resolver":"https://pith.science/pith/I7UYL3XLHLTMLVDAPKIN7VGXOX","bundle":"https://pith.science/pith/I7UYL3XLHLTMLVDAPKIN7VGXOX/bundle.json","state":"https://pith.science/pith/I7UYL3XLHLTMLVDAPKIN7VGXOX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/I7UYL3XLHLTMLVDAPKIN7VGXOX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:I7UYL3XLHLTMLVDAPKIN7VGXOX","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":"a8f43330394d2e1ef9b191e4e825014400e291485973add907be11b38893d6ef","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-11-04T21:39:16Z","title_canon_sha256":"90ab8df3e58f5e40eaac2a8ce1d7a683511af77a99611c74405ecf9052450b53"},"schema_version":"1.0","source":{"id":"0911.0936","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0911.0936","created_at":"2026-05-18T02:34:11Z"},{"alias_kind":"arxiv_version","alias_value":"0911.0936v1","created_at":"2026-05-18T02:34:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0911.0936","created_at":"2026-05-18T02:34:11Z"},{"alias_kind":"pith_short_12","alias_value":"I7UYL3XLHLTM","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_16","alias_value":"I7UYL3XLHLTMLVDA","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_8","alias_value":"I7UYL3XL","created_at":"2026-05-18T12:26:00Z"}],"graph_snapshots":[{"event_id":"sha256:051e0448f800035056c41d3a85802dacb608a848a329fd5fdfbca619559c120a","target":"graph","created_at":"2026-05-18T02:34:11Z","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":"The formation scenarios for single low-mass (M < 0.45 Msol) white dwarfs include enhanced mass loss from a metal-rich progenitor star or a common envelope phase of a solar-like star with a close-in massive planet or a brown dwarf. Both scenarios suggest that low-mass white dwarfs may have planets. Here, we present a Spitzer IRAC search for substellar and planetary mass companions to 14 low-mass white dwarfs. One of our targets, HS 1653+7753, displays near- and mid-infrared flux excess. However, follow-up MMT observations show that this excess is due to a nearby resolved source, which is mostly","authors_text":"B. McLeod, Mukremin Kilic, Warren R. Brown","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-11-04T21:39:16Z","title":"A Spitzer Search for Substellar Companions to Low Mass White Dwarfs"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0911.0936","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":"sha256:7e90eee641455f2138f637cfbc9f5efc7805dcef4b96b1094d85611015fb8ae2","target":"record","created_at":"2026-05-18T02:34:11Z","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":"a8f43330394d2e1ef9b191e4e825014400e291485973add907be11b38893d6ef","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-11-04T21:39:16Z","title_canon_sha256":"90ab8df3e58f5e40eaac2a8ce1d7a683511af77a99611c74405ecf9052450b53"},"schema_version":"1.0","source":{"id":"0911.0936","kind":"arxiv","version":1}},"canonical_sha256":"47e985eeeb3ae6c5d4607a90dfd4d775d29b8420fe08c4e28adf1bf073d4d51f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"47e985eeeb3ae6c5d4607a90dfd4d775d29b8420fe08c4e28adf1bf073d4d51f","first_computed_at":"2026-05-18T02:34:11.901288Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:34:11.901288Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"W/E7DKSmsOH/sVt/G+28d85kEFFCLnqxK/bMUf8nAwd6wh2k8H1ide2IW/pUIGmK0FbVZ0EMqaNSX4tK34BNBA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:34:11.901696Z","signed_message":"canonical_sha256_bytes"},"source_id":"0911.0936","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7e90eee641455f2138f637cfbc9f5efc7805dcef4b96b1094d85611015fb8ae2","sha256:051e0448f800035056c41d3a85802dacb608a848a329fd5fdfbca619559c120a"],"state_sha256":"0f7221ecf63d91f16d6ff27d3397b6a5bc2f758689128dc86533beaea2a7aa8e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"d/nwP3n1zzIV6gCgSDQ0VQjWyC/RQxqW5GJAbSpCuomGE0yPKHGJoHNLPLRkKr2QcXF5MdpgzZStDRcEoBx8Dw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T05:26:16.466055Z","bundle_sha256":"029ae17cd0ecb07d3156dd866bd8422c510c3b555fb5835a1f6bb065dd509072"}}