{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:QSTR5IJNR5IEJEJYIRTBKI544Y","short_pith_number":"pith:QSTR5IJN","canonical_record":{"source":{"id":"1307.1824","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-07-07T00:54:57Z","cross_cats_sorted":[],"title_canon_sha256":"59b3d4c83e0e9bcbc755ab0d412b787e097a541d723f9c3e78215e42f86412aa","abstract_canon_sha256":"44103777ce81f563779ea25aa7ab8fabe9158b319981ee89369602bce49422bd"},"schema_version":"1.0"},"canonical_sha256":"84a71ea12d8f5044913844661523bce623ce6398e4206fd6de21bcbe565a8d99","source":{"kind":"arxiv","id":"1307.1824","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1307.1824","created_at":"2026-05-18T03:19:03Z"},{"alias_kind":"arxiv_version","alias_value":"1307.1824v1","created_at":"2026-05-18T03:19:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1307.1824","created_at":"2026-05-18T03:19:03Z"},{"alias_kind":"pith_short_12","alias_value":"QSTR5IJNR5IE","created_at":"2026-05-18T12:27:57Z"},{"alias_kind":"pith_short_16","alias_value":"QSTR5IJNR5IEJEJY","created_at":"2026-05-18T12:27:57Z"},{"alias_kind":"pith_short_8","alias_value":"QSTR5IJN","created_at":"2026-05-18T12:27:57Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:QSTR5IJNR5IEJEJYIRTBKI544Y","target":"record","payload":{"canonical_record":{"source":{"id":"1307.1824","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-07-07T00:54:57Z","cross_cats_sorted":[],"title_canon_sha256":"59b3d4c83e0e9bcbc755ab0d412b787e097a541d723f9c3e78215e42f86412aa","abstract_canon_sha256":"44103777ce81f563779ea25aa7ab8fabe9158b319981ee89369602bce49422bd"},"schema_version":"1.0"},"canonical_sha256":"84a71ea12d8f5044913844661523bce623ce6398e4206fd6de21bcbe565a8d99","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:19:03.435746Z","signature_b64":"PLEHoXlK2NtWyYt6dCPeAGFs5/wBuUF8ERjrqlMCIXwstNm2btFugtCmUPKoZ6xXnAixhiNIFOFprNA7YmHGBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"84a71ea12d8f5044913844661523bce623ce6398e4206fd6de21bcbe565a8d99","last_reissued_at":"2026-05-18T03:19:03.434827Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:19:03.434827Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1307.1824","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":"2026-05-18T03:19:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1fAMXJvxTD9wqWasMAE+gC+wZmZcbgm3j7Dg3sV0jELI3HPt54CQ5c5UthxTTkV2fXYcN3QeANNvcDeSDYRnCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-25T01:32:06.962215Z"},"content_sha256":"7f55458a8b2d2ef9d42ed3c1f6b2faa64a712de001240c27ad777e8905d30edc","schema_version":"1.0","event_id":"sha256:7f55458a8b2d2ef9d42ed3c1f6b2faa64a712de001240c27ad777e8905d30edc"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:QSTR5IJNR5IEJEJYIRTBKI544Y","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Estimation of mass and cosmological constant of nearby spiral galaxies using galaxy rotation curve","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"B. Aryal, N. Baral, R. Pandey, U. Khanal, W. Saurer","submitted_at":"2013-07-07T00:54:57Z","abstract_excerpt":"An expression for rotational velocity of a test particle around the central mass in the invariant plane is derived. For this, a line element of Schwarzschild de-Sitter space-time is used to study the effect of cosmological constant ($\\Lambda$) on the motion of both massive and massless particles. Using rotation curve data of 15 nearby spiral and barred spiral galaxies, we estimated the mass and $\\Lambda$ of the galaxy. The mass of the galaxies are found to lie in the range 0.13-7.60 $\\times$ 10$^{40}$ kg. The cosmological constant ($\\Lambda$) is found to be negative ($-$0.03 to $-$0.10 $\\times"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1307.1824","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":"2026-05-18T03:19:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ern2nX8VK9ycsTrIoo27B1RbiBprns3xvAUae6xp3fEiYEahNbrPwz/MKRJFkE5dKT2mqTQAt/X2IyncWEAXCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-25T01:32:06.962581Z"},"content_sha256":"46d42b47092da4c8d564e2c7e5f5df171854cc2e73ace24ae8b6387f13564760","schema_version":"1.0","event_id":"sha256:46d42b47092da4c8d564e2c7e5f5df171854cc2e73ace24ae8b6387f13564760"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QSTR5IJNR5IEJEJYIRTBKI544Y/bundle.json","state_url":"https://pith.science/pith/QSTR5IJNR5IEJEJYIRTBKI544Y/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QSTR5IJNR5IEJEJYIRTBKI544Y/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":"2026-06-25T01:32:06Z","links":{"resolver":"https://pith.science/pith/QSTR5IJNR5IEJEJYIRTBKI544Y","bundle":"https://pith.science/pith/QSTR5IJNR5IEJEJYIRTBKI544Y/bundle.json","state":"https://pith.science/pith/QSTR5IJNR5IEJEJYIRTBKI544Y/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QSTR5IJNR5IEJEJYIRTBKI544Y/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:QSTR5IJNR5IEJEJYIRTBKI544Y","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":"44103777ce81f563779ea25aa7ab8fabe9158b319981ee89369602bce49422bd","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-07-07T00:54:57Z","title_canon_sha256":"59b3d4c83e0e9bcbc755ab0d412b787e097a541d723f9c3e78215e42f86412aa"},"schema_version":"1.0","source":{"id":"1307.1824","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1307.1824","created_at":"2026-05-18T03:19:03Z"},{"alias_kind":"arxiv_version","alias_value":"1307.1824v1","created_at":"2026-05-18T03:19:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1307.1824","created_at":"2026-05-18T03:19:03Z"},{"alias_kind":"pith_short_12","alias_value":"QSTR5IJNR5IE","created_at":"2026-05-18T12:27:57Z"},{"alias_kind":"pith_short_16","alias_value":"QSTR5IJNR5IEJEJY","created_at":"2026-05-18T12:27:57Z"},{"alias_kind":"pith_short_8","alias_value":"QSTR5IJN","created_at":"2026-05-18T12:27:57Z"}],"graph_snapshots":[{"event_id":"sha256:46d42b47092da4c8d564e2c7e5f5df171854cc2e73ace24ae8b6387f13564760","target":"graph","created_at":"2026-05-18T03:19:03Z","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":"An expression for rotational velocity of a test particle around the central mass in the invariant plane is derived. For this, a line element of Schwarzschild de-Sitter space-time is used to study the effect of cosmological constant ($\\Lambda$) on the motion of both massive and massless particles. Using rotation curve data of 15 nearby spiral and barred spiral galaxies, we estimated the mass and $\\Lambda$ of the galaxy. The mass of the galaxies are found to lie in the range 0.13-7.60 $\\times$ 10$^{40}$ kg. The cosmological constant ($\\Lambda$) is found to be negative ($-$0.03 to $-$0.10 $\\times","authors_text":"B. Aryal, N. Baral, R. Pandey, U. Khanal, W. Saurer","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-07-07T00:54:57Z","title":"Estimation of mass and cosmological constant of nearby spiral galaxies using galaxy rotation curve"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1307.1824","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":"sha256:7f55458a8b2d2ef9d42ed3c1f6b2faa64a712de001240c27ad777e8905d30edc","target":"record","created_at":"2026-05-18T03:19:03Z","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":"44103777ce81f563779ea25aa7ab8fabe9158b319981ee89369602bce49422bd","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-07-07T00:54:57Z","title_canon_sha256":"59b3d4c83e0e9bcbc755ab0d412b787e097a541d723f9c3e78215e42f86412aa"},"schema_version":"1.0","source":{"id":"1307.1824","kind":"arxiv","version":1}},"canonical_sha256":"84a71ea12d8f5044913844661523bce623ce6398e4206fd6de21bcbe565a8d99","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"84a71ea12d8f5044913844661523bce623ce6398e4206fd6de21bcbe565a8d99","first_computed_at":"2026-05-18T03:19:03.434827Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:19:03.434827Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"PLEHoXlK2NtWyYt6dCPeAGFs5/wBuUF8ERjrqlMCIXwstNm2btFugtCmUPKoZ6xXnAixhiNIFOFprNA7YmHGBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:19:03.435746Z","signed_message":"canonical_sha256_bytes"},"source_id":"1307.1824","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7f55458a8b2d2ef9d42ed3c1f6b2faa64a712de001240c27ad777e8905d30edc","sha256:46d42b47092da4c8d564e2c7e5f5df171854cc2e73ace24ae8b6387f13564760"],"state_sha256":"a9e8d73d54f280be85dc30c5ba620beb9ec64aea1ddd9545bd4e975c11a7eded"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IRQeXGsReBwLWqz2EgWY/+qWI3rPHM1+xQdbUzxR/edSqyi6zIiELtkqVpqMjF559D17SevnQlqJAkGhKy2CBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-25T01:32:06.964620Z","bundle_sha256":"be484f809fd8bbaa15f4991732e7c5a82d330c1158caa3e6569e9dd9d5480314"}}