{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:DFM4E234OJZQRJQ3C6GKYY4J4P","short_pith_number":"pith:DFM4E234","canonical_record":{"source":{"id":"1901.07230","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-01-22T09:48:54Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"34ef3dc31c1fec9c7aadd5db59e5f73ba6d400faf0171ea5166eff72c3f6c7bb","abstract_canon_sha256":"dd466c655ac9fd2630f06a6df1e4a303271dab356e182abda78d814a1e7bc956"},"schema_version":"1.0"},"canonical_sha256":"1959c26b7c727308a61b178cac6389e3f277cd46e9c8311ef1157adb4ae94a47","source":{"kind":"arxiv","id":"1901.07230","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.07230","created_at":"2026-05-17T23:55:16Z"},{"alias_kind":"arxiv_version","alias_value":"1901.07230v1","created_at":"2026-05-17T23:55:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.07230","created_at":"2026-05-17T23:55:16Z"},{"alias_kind":"pith_short_12","alias_value":"DFM4E234OJZQ","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_16","alias_value":"DFM4E234OJZQRJQ3","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_8","alias_value":"DFM4E234","created_at":"2026-05-18T12:33:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:DFM4E234OJZQRJQ3C6GKYY4J4P","target":"record","payload":{"canonical_record":{"source":{"id":"1901.07230","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-01-22T09:48:54Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"34ef3dc31c1fec9c7aadd5db59e5f73ba6d400faf0171ea5166eff72c3f6c7bb","abstract_canon_sha256":"dd466c655ac9fd2630f06a6df1e4a303271dab356e182abda78d814a1e7bc956"},"schema_version":"1.0"},"canonical_sha256":"1959c26b7c727308a61b178cac6389e3f277cd46e9c8311ef1157adb4ae94a47","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:55:16.767473Z","signature_b64":"Kn8W/lQ2sy/+O3AU8kGtwZ2GNXdLkbuDr8/PBPE6Ccxan6yLivsRuNiY83Y2hZf+uPAHfPAk4rJiojJvPEXoAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1959c26b7c727308a61b178cac6389e3f277cd46e9c8311ef1157adb4ae94a47","last_reissued_at":"2026-05-17T23:55:16.766726Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:55:16.766726Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1901.07230","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":"2026-05-17T23:55:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0CXMHUDf6W2bVyiH3YSSRNH3DnDfkjGyzkNnE+6XEiR6j+99Y7zTNHVObrVDiBLbuo+oC32CdlSUJ67tekokAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T21:34:36.989610Z"},"content_sha256":"d73c79eb19bbf1b7f9e69e61595c5ccf2a8902d3d3e7dccf7560b674fa6a32e7","schema_version":"1.0","event_id":"sha256:d73c79eb19bbf1b7f9e69e61595c5ccf2a8902d3d3e7dccf7560b674fa6a32e7"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:DFM4E234OJZQRJQ3C6GKYY4J4P","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The HST Large Programme on NGC6752. II. Multiple populations at the bottom of the main sequence probed in NIR","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"A. Bellini, A. Dieball, A. F. Marino, A. J. Burgasser, A. P. Milone, D. Apai, D. Nardiello, H. B. Richer, J. Anderson, J. M. Rees, L. R. Bedin, M. Libralato, M. Salaris, P. Bergeron, R. M. Rich","submitted_at":"2019-01-22T09:48:54Z","abstract_excerpt":"Historically, multiple populations in Globular Clusters (GCs) have been mostly studied from ultraviolet and optical filters down to stars that are more massive than ~0.6 solar masses. Here we exploit deep near-infrared (NIR) photometry from the Hubble Space Telescope to investigate multiple populations among M-dwarfs in the GC NGC6752. We discovered that the three main populations (A, B and C), previously observed in the brightest part of the color-magnitude diagram, define three distinct sequences that run from the main-sequence (MS) knee towards the bottom of the MS (~0.15 solar masses). The"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.07230","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":"2026-05-17T23:55:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"C/gi7v7AGVAKpTt6mJm2pr1SfBChUnET0HCYwJEZZQfylEoRhKsiPmw87CEeWXvu9xAo5wZqBw03YKVxVkTYAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T21:34:36.990006Z"},"content_sha256":"8e2c707cfc83ffafc55b79bbe87e9dcc7b000d2035a65cb04337a4769c9ae827","schema_version":"1.0","event_id":"sha256:8e2c707cfc83ffafc55b79bbe87e9dcc7b000d2035a65cb04337a4769c9ae827"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DFM4E234OJZQRJQ3C6GKYY4J4P/bundle.json","state_url":"https://pith.science/pith/DFM4E234OJZQRJQ3C6GKYY4J4P/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DFM4E234OJZQRJQ3C6GKYY4J4P/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":"2026-05-25T21:34:36Z","links":{"resolver":"https://pith.science/pith/DFM4E234OJZQRJQ3C6GKYY4J4P","bundle":"https://pith.science/pith/DFM4E234OJZQRJQ3C6GKYY4J4P/bundle.json","state":"https://pith.science/pith/DFM4E234OJZQRJQ3C6GKYY4J4P/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DFM4E234OJZQRJQ3C6GKYY4J4P/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:DFM4E234OJZQRJQ3C6GKYY4J4P","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":"dd466c655ac9fd2630f06a6df1e4a303271dab356e182abda78d814a1e7bc956","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-01-22T09:48:54Z","title_canon_sha256":"34ef3dc31c1fec9c7aadd5db59e5f73ba6d400faf0171ea5166eff72c3f6c7bb"},"schema_version":"1.0","source":{"id":"1901.07230","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.07230","created_at":"2026-05-17T23:55:16Z"},{"alias_kind":"arxiv_version","alias_value":"1901.07230v1","created_at":"2026-05-17T23:55:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.07230","created_at":"2026-05-17T23:55:16Z"},{"alias_kind":"pith_short_12","alias_value":"DFM4E234OJZQ","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_16","alias_value":"DFM4E234OJZQRJQ3","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_8","alias_value":"DFM4E234","created_at":"2026-05-18T12:33:15Z"}],"graph_snapshots":[{"event_id":"sha256:8e2c707cfc83ffafc55b79bbe87e9dcc7b000d2035a65cb04337a4769c9ae827","target":"graph","created_at":"2026-05-17T23:55:16Z","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":"Historically, multiple populations in Globular Clusters (GCs) have been mostly studied from ultraviolet and optical filters down to stars that are more massive than ~0.6 solar masses. Here we exploit deep near-infrared (NIR) photometry from the Hubble Space Telescope to investigate multiple populations among M-dwarfs in the GC NGC6752. We discovered that the three main populations (A, B and C), previously observed in the brightest part of the color-magnitude diagram, define three distinct sequences that run from the main-sequence (MS) knee towards the bottom of the MS (~0.15 solar masses). The","authors_text":"A. Bellini, A. Dieball, A. F. Marino, A. J. Burgasser, A. P. Milone, D. Apai, D. Nardiello, H. B. Richer, J. Anderson, J. M. Rees, L. R. Bedin, M. Libralato, M. Salaris, P. Bergeron, R. M. Rich","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-01-22T09:48:54Z","title":"The HST Large Programme on NGC6752. II. Multiple populations at the bottom of the main sequence probed in NIR"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.07230","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:d73c79eb19bbf1b7f9e69e61595c5ccf2a8902d3d3e7dccf7560b674fa6a32e7","target":"record","created_at":"2026-05-17T23:55:16Z","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":"dd466c655ac9fd2630f06a6df1e4a303271dab356e182abda78d814a1e7bc956","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-01-22T09:48:54Z","title_canon_sha256":"34ef3dc31c1fec9c7aadd5db59e5f73ba6d400faf0171ea5166eff72c3f6c7bb"},"schema_version":"1.0","source":{"id":"1901.07230","kind":"arxiv","version":1}},"canonical_sha256":"1959c26b7c727308a61b178cac6389e3f277cd46e9c8311ef1157adb4ae94a47","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1959c26b7c727308a61b178cac6389e3f277cd46e9c8311ef1157adb4ae94a47","first_computed_at":"2026-05-17T23:55:16.766726Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:55:16.766726Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Kn8W/lQ2sy/+O3AU8kGtwZ2GNXdLkbuDr8/PBPE6Ccxan6yLivsRuNiY83Y2hZf+uPAHfPAk4rJiojJvPEXoAw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:55:16.767473Z","signed_message":"canonical_sha256_bytes"},"source_id":"1901.07230","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d73c79eb19bbf1b7f9e69e61595c5ccf2a8902d3d3e7dccf7560b674fa6a32e7","sha256:8e2c707cfc83ffafc55b79bbe87e9dcc7b000d2035a65cb04337a4769c9ae827"],"state_sha256":"c28d1470f09f4f04c61b68892e337eeaa69d8cce734be6b3fa36495cae6c4960"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jT0n3jtxxn+4PAAzypYUGP30jZrEvIP3rBJnMfnlaMUEdTzugQB17OLnNcAlGaY9kDrUlwSEL9kiDyEyJLYDAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T21:34:36.992644Z","bundle_sha256":"532bd7b09adeaed23f3194815e54e0303254c15b714bbc70a5a7e406f2efaaa6"}}