{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:QFCQVBRXS74MYHVIJWDU57N347","short_pith_number":"pith:QFCQVBRX","canonical_record":{"source":{"id":"1404.5354","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-04-22T00:11:52Z","cross_cats_sorted":[],"title_canon_sha256":"99b72c5f9cb13550260c3dd19974eebdf66e00378aa39664562fd4e726b14b1f","abstract_canon_sha256":"b3934027d47993bbb519f75bd090f0bce5d239b33fe05cfcba85a7526b6847da"},"schema_version":"1.0"},"canonical_sha256":"81450a863797f8cc1ea84d874efdbbe7ddef42d7f810d2ac05c41caadfcab512","source":{"kind":"arxiv","id":"1404.5354","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1404.5354","created_at":"2026-05-18T01:43:26Z"},{"alias_kind":"arxiv_version","alias_value":"1404.5354v1","created_at":"2026-05-18T01:43:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1404.5354","created_at":"2026-05-18T01:43:26Z"},{"alias_kind":"pith_short_12","alias_value":"QFCQVBRXS74M","created_at":"2026-05-18T12:28:43Z"},{"alias_kind":"pith_short_16","alias_value":"QFCQVBRXS74MYHVI","created_at":"2026-05-18T12:28:43Z"},{"alias_kind":"pith_short_8","alias_value":"QFCQVBRX","created_at":"2026-05-18T12:28:43Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:QFCQVBRXS74MYHVIJWDU57N347","target":"record","payload":{"canonical_record":{"source":{"id":"1404.5354","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-04-22T00:11:52Z","cross_cats_sorted":[],"title_canon_sha256":"99b72c5f9cb13550260c3dd19974eebdf66e00378aa39664562fd4e726b14b1f","abstract_canon_sha256":"b3934027d47993bbb519f75bd090f0bce5d239b33fe05cfcba85a7526b6847da"},"schema_version":"1.0"},"canonical_sha256":"81450a863797f8cc1ea84d874efdbbe7ddef42d7f810d2ac05c41caadfcab512","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:43:26.585839Z","signature_b64":"odx0ZYmnTSYXqtBJ4FikfIo8+r+QxSVt0V5unP0x7Vp8JTvG1Qy3fhyLyuwoZOBQm7rSN/vJOSI0Ukf4fkaOAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"81450a863797f8cc1ea84d874efdbbe7ddef42d7f810d2ac05c41caadfcab512","last_reissued_at":"2026-05-18T01:43:26.585116Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:43:26.585116Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1404.5354","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":"2026-05-18T01:43:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"K0kJlEZSzFNZ/4xOkwrUaPn6+n5MbxbP03769U7yNuy21pNa3RNK4+OuhTrO84El3YeoxOtmqU8Cp2lM3gE9Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T10:01:45.639339Z"},"content_sha256":"35e0a7a52985f2d7e21343be83527171f04d19c63e7700d4a4dc3fd484b2f8f5","schema_version":"1.0","event_id":"sha256:35e0a7a52985f2d7e21343be83527171f04d19c63e7700d4a4dc3fd484b2f8f5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:QFCQVBRXS74MYHVIJWDU57N347","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A New Method for Measuring Metallicities of Young Super Star Clusters","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Ben Davies, Bertrand Plez, Chris Evans, Eva Schinnerer, Fabio Bresolin, J. Zachary Gazak, Lee Patrick, Maria Bergemann, Nate Bastian, Rolf Kudritzki","submitted_at":"2014-04-22T00:11:52Z","abstract_excerpt":"We demonstrate how the metallicities of young super star clusters can be measured using novel spectroscopic techniques in the J-band. The near-infrared flux of super star clusters older than ~6 Myr is dominated by tens to hundreds of red supergiant stars. Our technique is designed to harness the integrated light of that population and produces accurate metallicities for new observations in galaxies above (M83) and below (NGC 6946) solar metallicity. In M83 we find [Z]= +0.28 +/- 0.14 dex using a moderate resolution (R~3500) J-band spectrum and in NGC 6496 we report [Z]= -0.32 +/- 0.20 dex from"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1404.5354","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":"2026-05-18T01:43:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aMyLxC+ubZ6NRPHnd+ROsi4oPXVK9sRrQSekCKHckhLkJaAn5VuFzB18Ddfj3hgdsB2gshmqy+S+NZBoL4xSDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T10:01:45.639702Z"},"content_sha256":"b2053e23b6d3cc0bcb84fc0f42daf00ab6ff1b0b167d334ec45e5da321d29987","schema_version":"1.0","event_id":"sha256:b2053e23b6d3cc0bcb84fc0f42daf00ab6ff1b0b167d334ec45e5da321d29987"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QFCQVBRXS74MYHVIJWDU57N347/bundle.json","state_url":"https://pith.science/pith/QFCQVBRXS74MYHVIJWDU57N347/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QFCQVBRXS74MYHVIJWDU57N347/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":"2026-05-26T10:01:45Z","links":{"resolver":"https://pith.science/pith/QFCQVBRXS74MYHVIJWDU57N347","bundle":"https://pith.science/pith/QFCQVBRXS74MYHVIJWDU57N347/bundle.json","state":"https://pith.science/pith/QFCQVBRXS74MYHVIJWDU57N347/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QFCQVBRXS74MYHVIJWDU57N347/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:QFCQVBRXS74MYHVIJWDU57N347","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":"b3934027d47993bbb519f75bd090f0bce5d239b33fe05cfcba85a7526b6847da","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-04-22T00:11:52Z","title_canon_sha256":"99b72c5f9cb13550260c3dd19974eebdf66e00378aa39664562fd4e726b14b1f"},"schema_version":"1.0","source":{"id":"1404.5354","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1404.5354","created_at":"2026-05-18T01:43:26Z"},{"alias_kind":"arxiv_version","alias_value":"1404.5354v1","created_at":"2026-05-18T01:43:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1404.5354","created_at":"2026-05-18T01:43:26Z"},{"alias_kind":"pith_short_12","alias_value":"QFCQVBRXS74M","created_at":"2026-05-18T12:28:43Z"},{"alias_kind":"pith_short_16","alias_value":"QFCQVBRXS74MYHVI","created_at":"2026-05-18T12:28:43Z"},{"alias_kind":"pith_short_8","alias_value":"QFCQVBRX","created_at":"2026-05-18T12:28:43Z"}],"graph_snapshots":[{"event_id":"sha256:b2053e23b6d3cc0bcb84fc0f42daf00ab6ff1b0b167d334ec45e5da321d29987","target":"graph","created_at":"2026-05-18T01:43:26Z","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":"We demonstrate how the metallicities of young super star clusters can be measured using novel spectroscopic techniques in the J-band. The near-infrared flux of super star clusters older than ~6 Myr is dominated by tens to hundreds of red supergiant stars. Our technique is designed to harness the integrated light of that population and produces accurate metallicities for new observations in galaxies above (M83) and below (NGC 6946) solar metallicity. In M83 we find [Z]= +0.28 +/- 0.14 dex using a moderate resolution (R~3500) J-band spectrum and in NGC 6496 we report [Z]= -0.32 +/- 0.20 dex from","authors_text":"Ben Davies, Bertrand Plez, Chris Evans, Eva Schinnerer, Fabio Bresolin, J. Zachary Gazak, Lee Patrick, Maria Bergemann, Nate Bastian, Rolf Kudritzki","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-04-22T00:11:52Z","title":"A New Method for Measuring Metallicities of Young Super Star Clusters"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1404.5354","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":"sha256:35e0a7a52985f2d7e21343be83527171f04d19c63e7700d4a4dc3fd484b2f8f5","target":"record","created_at":"2026-05-18T01:43:26Z","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":"b3934027d47993bbb519f75bd090f0bce5d239b33fe05cfcba85a7526b6847da","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-04-22T00:11:52Z","title_canon_sha256":"99b72c5f9cb13550260c3dd19974eebdf66e00378aa39664562fd4e726b14b1f"},"schema_version":"1.0","source":{"id":"1404.5354","kind":"arxiv","version":1}},"canonical_sha256":"81450a863797f8cc1ea84d874efdbbe7ddef42d7f810d2ac05c41caadfcab512","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"81450a863797f8cc1ea84d874efdbbe7ddef42d7f810d2ac05c41caadfcab512","first_computed_at":"2026-05-18T01:43:26.585116Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:43:26.585116Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"odx0ZYmnTSYXqtBJ4FikfIo8+r+QxSVt0V5unP0x7Vp8JTvG1Qy3fhyLyuwoZOBQm7rSN/vJOSI0Ukf4fkaOAw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:43:26.585839Z","signed_message":"canonical_sha256_bytes"},"source_id":"1404.5354","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:35e0a7a52985f2d7e21343be83527171f04d19c63e7700d4a4dc3fd484b2f8f5","sha256:b2053e23b6d3cc0bcb84fc0f42daf00ab6ff1b0b167d334ec45e5da321d29987"],"state_sha256":"ad80eae5e0a8e9e75d51440af6da2d3687577188138bde490ad169ecc8801528"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kaWsWU6DpHIe8GEZXnTDYqaBG8ihZirWrL/DUktLkkr1VumRyqe681hSVliMgprP+oGv9nTRB+FgV2WgE/8CAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T10:01:45.643363Z","bundle_sha256":"20b794d2f7197a1861a73697ec4d31e7142436acf0374174a20e71fb5327f010"}}