{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:E5RTNRU2XUJJ32VZ6C3JF6MNBQ","short_pith_number":"pith:E5RTNRU2","canonical_record":{"source":{"id":"1701.01563","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-01-06T08:13:14Z","cross_cats_sorted":[],"title_canon_sha256":"8e7f46a1d04ba1e39e0aebe257492ad5b3635ec36906791f481ac371016f3cc0","abstract_canon_sha256":"184f799269956fd19eb6829f1a572ac96b9bdbe14e00c93d21749d548db604be"},"schema_version":"1.0"},"canonical_sha256":"276336c69abd129deab9f0b692f98d0c0b0694521311b96d78edbec227fee23a","source":{"kind":"arxiv","id":"1701.01563","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1701.01563","created_at":"2026-05-18T00:45:14Z"},{"alias_kind":"arxiv_version","alias_value":"1701.01563v1","created_at":"2026-05-18T00:45:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1701.01563","created_at":"2026-05-18T00:45:14Z"},{"alias_kind":"pith_short_12","alias_value":"E5RTNRU2XUJJ","created_at":"2026-05-18T12:31:12Z"},{"alias_kind":"pith_short_16","alias_value":"E5RTNRU2XUJJ32VZ","created_at":"2026-05-18T12:31:12Z"},{"alias_kind":"pith_short_8","alias_value":"E5RTNRU2","created_at":"2026-05-18T12:31:12Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:E5RTNRU2XUJJ32VZ6C3JF6MNBQ","target":"record","payload":{"canonical_record":{"source":{"id":"1701.01563","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-01-06T08:13:14Z","cross_cats_sorted":[],"title_canon_sha256":"8e7f46a1d04ba1e39e0aebe257492ad5b3635ec36906791f481ac371016f3cc0","abstract_canon_sha256":"184f799269956fd19eb6829f1a572ac96b9bdbe14e00c93d21749d548db604be"},"schema_version":"1.0"},"canonical_sha256":"276336c69abd129deab9f0b692f98d0c0b0694521311b96d78edbec227fee23a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:45:14.385561Z","signature_b64":"i5/IDnc7lBTFgNB3NJMSzekpuw1Imvda91qbwqjAYlSz2wFRV8I0PA8BdvJZ7FhPmyDDwRN7SX445k9dCwBLDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"276336c69abd129deab9f0b692f98d0c0b0694521311b96d78edbec227fee23a","last_reissued_at":"2026-05-18T00:45:14.384858Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:45:14.384858Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1701.01563","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":"2026-05-18T00:45:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Pk4/NCdBBiyIOCLC2AKrYh996+ubOOgl0g2/xwcfhdvV4429lRxEmjWEDrpVzXIQng7H2+gZN3+5I8G+JJOoDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T10:41:13.113062Z"},"content_sha256":"8f6f59ab71b16475069650890cb2cdd0c6c0ed4b9aefa8dfdde8ff083611a4a3","schema_version":"1.0","event_id":"sha256:8f6f59ab71b16475069650890cb2cdd0c6c0ed4b9aefa8dfdde8ff083611a4a3"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:E5RTNRU2XUJJ32VZ6C3JF6MNBQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The ATLASGAL survey: The sample of young massive cluster progenitors","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A. Sanna, F. Motte, F. Wyrowski, K. M. Menten, M. Wienen, S. Bontemps, S. T. Megeath, T. Csengeri","submitted_at":"2017-01-06T08:13:14Z","abstract_excerpt":"The progenitors of high-mass stars and clusters are still challenging to recognise. Only unbiased surveys, sensitive to compact regions of high dust column density, can unambiguously reveal such a small population of particularly massive and cold clumps. Here we study a flux limited sample of compact sources from the ATLASGAL survey to identify a sample of candidate progenitors of massive clusters in the inner Galaxy. Sensitive mid-infrared data at 21-24 $\\mu$m from the WISE and MIPSGAL surveys were explored to search for embedded objects, and complementary spectroscopic data were used to inve"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1701.01563","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":"2026-05-18T00:45:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+fuSyN85ZbCxeziqm/UNG7f0qhsQlwm8ONDxyuCYp1YKC7GczgqzVDAWGnl3m1xj6xYJCD8pD2Gb8iXYA8aVAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T10:41:13.113426Z"},"content_sha256":"2ea5bd5638c1a66d386a6a256ec36f439ec8ef5dafc4d781e7b69b0546480561","schema_version":"1.0","event_id":"sha256:2ea5bd5638c1a66d386a6a256ec36f439ec8ef5dafc4d781e7b69b0546480561"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/E5RTNRU2XUJJ32VZ6C3JF6MNBQ/bundle.json","state_url":"https://pith.science/pith/E5RTNRU2XUJJ32VZ6C3JF6MNBQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/E5RTNRU2XUJJ32VZ6C3JF6MNBQ/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":"2026-06-01T10:41:13Z","links":{"resolver":"https://pith.science/pith/E5RTNRU2XUJJ32VZ6C3JF6MNBQ","bundle":"https://pith.science/pith/E5RTNRU2XUJJ32VZ6C3JF6MNBQ/bundle.json","state":"https://pith.science/pith/E5RTNRU2XUJJ32VZ6C3JF6MNBQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/E5RTNRU2XUJJ32VZ6C3JF6MNBQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:E5RTNRU2XUJJ32VZ6C3JF6MNBQ","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":"184f799269956fd19eb6829f1a572ac96b9bdbe14e00c93d21749d548db604be","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-01-06T08:13:14Z","title_canon_sha256":"8e7f46a1d04ba1e39e0aebe257492ad5b3635ec36906791f481ac371016f3cc0"},"schema_version":"1.0","source":{"id":"1701.01563","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1701.01563","created_at":"2026-05-18T00:45:14Z"},{"alias_kind":"arxiv_version","alias_value":"1701.01563v1","created_at":"2026-05-18T00:45:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1701.01563","created_at":"2026-05-18T00:45:14Z"},{"alias_kind":"pith_short_12","alias_value":"E5RTNRU2XUJJ","created_at":"2026-05-18T12:31:12Z"},{"alias_kind":"pith_short_16","alias_value":"E5RTNRU2XUJJ32VZ","created_at":"2026-05-18T12:31:12Z"},{"alias_kind":"pith_short_8","alias_value":"E5RTNRU2","created_at":"2026-05-18T12:31:12Z"}],"graph_snapshots":[{"event_id":"sha256:2ea5bd5638c1a66d386a6a256ec36f439ec8ef5dafc4d781e7b69b0546480561","target":"graph","created_at":"2026-05-18T00:45:14Z","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 progenitors of high-mass stars and clusters are still challenging to recognise. Only unbiased surveys, sensitive to compact regions of high dust column density, can unambiguously reveal such a small population of particularly massive and cold clumps. Here we study a flux limited sample of compact sources from the ATLASGAL survey to identify a sample of candidate progenitors of massive clusters in the inner Galaxy. Sensitive mid-infrared data at 21-24 $\\mu$m from the WISE and MIPSGAL surveys were explored to search for embedded objects, and complementary spectroscopic data were used to inve","authors_text":"A. Sanna, F. Motte, F. Wyrowski, K. M. Menten, M. Wienen, S. Bontemps, S. T. Megeath, T. Csengeri","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-01-06T08:13:14Z","title":"The ATLASGAL survey: The sample of young massive cluster progenitors"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1701.01563","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":"sha256:8f6f59ab71b16475069650890cb2cdd0c6c0ed4b9aefa8dfdde8ff083611a4a3","target":"record","created_at":"2026-05-18T00:45:14Z","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":"184f799269956fd19eb6829f1a572ac96b9bdbe14e00c93d21749d548db604be","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-01-06T08:13:14Z","title_canon_sha256":"8e7f46a1d04ba1e39e0aebe257492ad5b3635ec36906791f481ac371016f3cc0"},"schema_version":"1.0","source":{"id":"1701.01563","kind":"arxiv","version":1}},"canonical_sha256":"276336c69abd129deab9f0b692f98d0c0b0694521311b96d78edbec227fee23a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"276336c69abd129deab9f0b692f98d0c0b0694521311b96d78edbec227fee23a","first_computed_at":"2026-05-18T00:45:14.384858Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:45:14.384858Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"i5/IDnc7lBTFgNB3NJMSzekpuw1Imvda91qbwqjAYlSz2wFRV8I0PA8BdvJZ7FhPmyDDwRN7SX445k9dCwBLDA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:45:14.385561Z","signed_message":"canonical_sha256_bytes"},"source_id":"1701.01563","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8f6f59ab71b16475069650890cb2cdd0c6c0ed4b9aefa8dfdde8ff083611a4a3","sha256:2ea5bd5638c1a66d386a6a256ec36f439ec8ef5dafc4d781e7b69b0546480561"],"state_sha256":"32372d1e53afae11a37cad8edc2d5080f35c5b3e4bb17bca1a9f479faae8bd8b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2BPR0YQjFdWFTjmQddVj0h5yIHXseCG525gjzF5pHQ7i4ftRzzA1ueLVdjAnwLmC+e3NtuDdhWE9aHXvIBk8Cg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T10:41:13.115249Z","bundle_sha256":"0990c02c35e23f5d9e68c43ef1abce0a3008d788fa12adf27ee449a7d490267d"}}