{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:4ONEPUFMDHSYKHFFMKWFHYNKVR","short_pith_number":"pith:4ONEPUFM","canonical_record":{"source":{"id":"1503.06158","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-03-20T17:00:40Z","cross_cats_sorted":[],"title_canon_sha256":"ec7a620af78336aa6be59482e36a1814d7e82dbd5bb510f3f49817ff2c75af83","abstract_canon_sha256":"44bc4c49d04c3c23d4810bc768ce64cabc2966b441e1aa95f2e9a7a87757b1d2"},"schema_version":"1.0"},"canonical_sha256":"e39a47d0ac19e5851ca562ac53e1aaac6f733697f2c58355022b2e863d8b2ac1","source":{"kind":"arxiv","id":"1503.06158","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1503.06158","created_at":"2026-05-18T02:17:00Z"},{"alias_kind":"arxiv_version","alias_value":"1503.06158v1","created_at":"2026-05-18T02:17:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1503.06158","created_at":"2026-05-18T02:17:00Z"},{"alias_kind":"pith_short_12","alias_value":"4ONEPUFMDHSY","created_at":"2026-05-18T12:29:05Z"},{"alias_kind":"pith_short_16","alias_value":"4ONEPUFMDHSYKHFF","created_at":"2026-05-18T12:29:05Z"},{"alias_kind":"pith_short_8","alias_value":"4ONEPUFM","created_at":"2026-05-18T12:29:05Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:4ONEPUFMDHSYKHFFMKWFHYNKVR","target":"record","payload":{"canonical_record":{"source":{"id":"1503.06158","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-03-20T17:00:40Z","cross_cats_sorted":[],"title_canon_sha256":"ec7a620af78336aa6be59482e36a1814d7e82dbd5bb510f3f49817ff2c75af83","abstract_canon_sha256":"44bc4c49d04c3c23d4810bc768ce64cabc2966b441e1aa95f2e9a7a87757b1d2"},"schema_version":"1.0"},"canonical_sha256":"e39a47d0ac19e5851ca562ac53e1aaac6f733697f2c58355022b2e863d8b2ac1","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:17:00.235791Z","signature_b64":"/K8TkXeZrj/tilVNATgu4WKWceHzAnZuT4gBlUonj/0E5BLDYtQraFKkfHqzO6MUQBxFhOXBbl+HWDtHbq7jBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e39a47d0ac19e5851ca562ac53e1aaac6f733697f2c58355022b2e863d8b2ac1","last_reissued_at":"2026-05-18T02:17:00.235133Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:17:00.235133Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1503.06158","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":"2026-05-18T02:17:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tG3Su9YjBeavhSTILRgCh0UlNeB9DufjnvRBicV7NuM2PVqCtJePzq169U23kEYjebIt/sUh4EBaP1IkoBK+Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T14:57:33.702213Z"},"content_sha256":"c4d7d6b36463fcc460e565b77cf5b24f4b4600b1aae06e107abf3c027de37e6d","schema_version":"1.0","event_id":"sha256:c4d7d6b36463fcc460e565b77cf5b24f4b4600b1aae06e107abf3c027de37e6d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:4ONEPUFMDHSYKHFFMKWFHYNKVR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The physical state of selected cold clumps","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A. Parikka, J. Harju, J. Malinen, M. Juvela, V.-M. Pelkonen","submitted_at":"2015-03-20T17:00:40Z","abstract_excerpt":"Context. he study of prestellar cores is essential to understanding the initial stages of star formation. With $Herschel$ more cold clumps have been detected than ever before. For this study we have selected 21 cold clumps from 20 $Herschel$ fields observed as a follow-up on original $Planck$ detections. We have observed these clumps in $^{13}$CO (1-0), C$^{18}$O (1-0), and N$_2$H$^+$ (1-0) lines. Aims. Our aim is to find out if these cold clumps are prestellar. We have examined to what extent independent analysis of the dust and the molecular lines lead to similar conclusions about the masses"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1503.06158","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":"2026-05-18T02:17:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NnNu/kOv+MqsuA09BbLTUs4YhUQxo0cdKikB59N+st1k/1lZYPvQCnZcjFGh9n40xy0pOPxTpoiLk8SOKc83DQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T14:57:33.702579Z"},"content_sha256":"e357e60647e8c715610d5f0ba02cdc21bafc017085b7058edbb4f26400b30ed6","schema_version":"1.0","event_id":"sha256:e357e60647e8c715610d5f0ba02cdc21bafc017085b7058edbb4f26400b30ed6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4ONEPUFMDHSYKHFFMKWFHYNKVR/bundle.json","state_url":"https://pith.science/pith/4ONEPUFMDHSYKHFFMKWFHYNKVR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4ONEPUFMDHSYKHFFMKWFHYNKVR/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":"2026-06-11T14:57:33Z","links":{"resolver":"https://pith.science/pith/4ONEPUFMDHSYKHFFMKWFHYNKVR","bundle":"https://pith.science/pith/4ONEPUFMDHSYKHFFMKWFHYNKVR/bundle.json","state":"https://pith.science/pith/4ONEPUFMDHSYKHFFMKWFHYNKVR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4ONEPUFMDHSYKHFFMKWFHYNKVR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:4ONEPUFMDHSYKHFFMKWFHYNKVR","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":"44bc4c49d04c3c23d4810bc768ce64cabc2966b441e1aa95f2e9a7a87757b1d2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-03-20T17:00:40Z","title_canon_sha256":"ec7a620af78336aa6be59482e36a1814d7e82dbd5bb510f3f49817ff2c75af83"},"schema_version":"1.0","source":{"id":"1503.06158","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1503.06158","created_at":"2026-05-18T02:17:00Z"},{"alias_kind":"arxiv_version","alias_value":"1503.06158v1","created_at":"2026-05-18T02:17:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1503.06158","created_at":"2026-05-18T02:17:00Z"},{"alias_kind":"pith_short_12","alias_value":"4ONEPUFMDHSY","created_at":"2026-05-18T12:29:05Z"},{"alias_kind":"pith_short_16","alias_value":"4ONEPUFMDHSYKHFF","created_at":"2026-05-18T12:29:05Z"},{"alias_kind":"pith_short_8","alias_value":"4ONEPUFM","created_at":"2026-05-18T12:29:05Z"}],"graph_snapshots":[{"event_id":"sha256:e357e60647e8c715610d5f0ba02cdc21bafc017085b7058edbb4f26400b30ed6","target":"graph","created_at":"2026-05-18T02:17:00Z","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":"Context. he study of prestellar cores is essential to understanding the initial stages of star formation. With $Herschel$ more cold clumps have been detected than ever before. For this study we have selected 21 cold clumps from 20 $Herschel$ fields observed as a follow-up on original $Planck$ detections. We have observed these clumps in $^{13}$CO (1-0), C$^{18}$O (1-0), and N$_2$H$^+$ (1-0) lines. Aims. Our aim is to find out if these cold clumps are prestellar. We have examined to what extent independent analysis of the dust and the molecular lines lead to similar conclusions about the masses","authors_text":"A. Parikka, J. Harju, J. Malinen, M. Juvela, V.-M. Pelkonen","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-03-20T17:00:40Z","title":"The physical state of selected cold clumps"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1503.06158","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:c4d7d6b36463fcc460e565b77cf5b24f4b4600b1aae06e107abf3c027de37e6d","target":"record","created_at":"2026-05-18T02:17:00Z","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":"44bc4c49d04c3c23d4810bc768ce64cabc2966b441e1aa95f2e9a7a87757b1d2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-03-20T17:00:40Z","title_canon_sha256":"ec7a620af78336aa6be59482e36a1814d7e82dbd5bb510f3f49817ff2c75af83"},"schema_version":"1.0","source":{"id":"1503.06158","kind":"arxiv","version":1}},"canonical_sha256":"e39a47d0ac19e5851ca562ac53e1aaac6f733697f2c58355022b2e863d8b2ac1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e39a47d0ac19e5851ca562ac53e1aaac6f733697f2c58355022b2e863d8b2ac1","first_computed_at":"2026-05-18T02:17:00.235133Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:17:00.235133Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"/K8TkXeZrj/tilVNATgu4WKWceHzAnZuT4gBlUonj/0E5BLDYtQraFKkfHqzO6MUQBxFhOXBbl+HWDtHbq7jBw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:17:00.235791Z","signed_message":"canonical_sha256_bytes"},"source_id":"1503.06158","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c4d7d6b36463fcc460e565b77cf5b24f4b4600b1aae06e107abf3c027de37e6d","sha256:e357e60647e8c715610d5f0ba02cdc21bafc017085b7058edbb4f26400b30ed6"],"state_sha256":"4641e0e7415c9b116c6e9220aaae4928f7494359cf9f5c7c66ad1d36cf02bb8e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"l6ebvNO3w2WfTXbFWDZBZiongxn3gfiWE5Vj0Sk3co85oRe2Uenp4M7hPSPv3JX3qWqXyL5riwwFQ/Drsz6UBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-11T14:57:33.705723Z","bundle_sha256":"ec8e2bde71d5596786b0b43736dd2ffa10540cff602e6be0b89381ce96b113b7"}}