{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:K2QM3CUAR6UH6URO5FZWVYTLFR","short_pith_number":"pith:K2QM3CUA","canonical_record":{"source":{"id":"1509.05863","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-09-19T09:27:25Z","cross_cats_sorted":[],"title_canon_sha256":"08a4df421fca24a772e172323d405ea429df5238bf319f95e02618a73f00045a","abstract_canon_sha256":"baa2c7cb0480bcd3d2ef16421d287227afefed16a1b702d7c241e4052b55800b"},"schema_version":"1.0"},"canonical_sha256":"56a0cd8a808fa87f522ee9736ae26b2c423f40900d5af67d8409b92a7e3f08b4","source":{"kind":"arxiv","id":"1509.05863","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1509.05863","created_at":"2026-05-18T01:29:44Z"},{"alias_kind":"arxiv_version","alias_value":"1509.05863v1","created_at":"2026-05-18T01:29:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1509.05863","created_at":"2026-05-18T01:29:44Z"},{"alias_kind":"pith_short_12","alias_value":"K2QM3CUAR6UH","created_at":"2026-05-18T12:29:27Z"},{"alias_kind":"pith_short_16","alias_value":"K2QM3CUAR6UH6URO","created_at":"2026-05-18T12:29:27Z"},{"alias_kind":"pith_short_8","alias_value":"K2QM3CUA","created_at":"2026-05-18T12:29:27Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:K2QM3CUAR6UH6URO5FZWVYTLFR","target":"record","payload":{"canonical_record":{"source":{"id":"1509.05863","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-09-19T09:27:25Z","cross_cats_sorted":[],"title_canon_sha256":"08a4df421fca24a772e172323d405ea429df5238bf319f95e02618a73f00045a","abstract_canon_sha256":"baa2c7cb0480bcd3d2ef16421d287227afefed16a1b702d7c241e4052b55800b"},"schema_version":"1.0"},"canonical_sha256":"56a0cd8a808fa87f522ee9736ae26b2c423f40900d5af67d8409b92a7e3f08b4","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:29:44.535232Z","signature_b64":"bruKocObUNcHgQCM81kfNLehQYc0CPQIr+bByEOH/Xiy5C+j54hF0zKsHJS5w2PTwDzgMVn4bq0MAlFmW+2UBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"56a0cd8a808fa87f522ee9736ae26b2c423f40900d5af67d8409b92a7e3f08b4","last_reissued_at":"2026-05-18T01:29:44.534671Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:29:44.534671Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1509.05863","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":"2026-05-18T01:29:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"QbLakBNtej8qn3mywovYO9+WASIbI5gdW/tFAKkMNx6dzdLnocmKhy2hADZB+Dzar94KHkUm72qKMNNQU6cSAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T06:24:54.584149Z"},"content_sha256":"2fcf3e900c8afef8118eaf513922ebe695199444ac1371a01d6e086b23c78a61","schema_version":"1.0","event_id":"sha256:2fcf3e900c8afef8118eaf513922ebe695199444ac1371a01d6e086b23c78a61"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:K2QM3CUAR6UH6URO5FZWVYTLFR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"X-ray emissivity of old stellar populations: a local group census","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Chong Ge, Christine Jones, Q.Daniel Wang, Qiusheng Gu, Ralph P. Kraft, Shawn Roberts, William R. Forman, Xiaojie Xu, Zhiyuan Li","submitted_at":"2015-09-19T09:27:25Z","abstract_excerpt":"We study the unresolved X-ray emission in three Local Group dwarf elliptical galaxies (NGC 147, NGC 185 and NGC 205) using XMM-Newton observations, which most likely originates from a collection of weak X-ray sources, mainly cataclysmic variables and coronally active binaries. Precise knowledge of this stellar X-ray emission is crucial not only for understanding the relevant stellar astrophysics but also for disentangling and quantifying the thermal emission from diffuse hot gas in nearby galaxies.We find that the integrated X-ray emissivities of the individual dwarf ellipticals agree well wit"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1509.05863","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":"2026-05-18T01:29:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kskQPmhcyxOhk3HzxVO0Zyu2KisgaDPsZ7NAFRBnbeuFNDog30sw9n/NSZN2oAav3mBlwWqYUFY4yrTvUEDjAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T06:24:54.584526Z"},"content_sha256":"cd075988967c08e9f65e56a8e5d22810d5e24892ee9c1ae287f67ee2817d2cff","schema_version":"1.0","event_id":"sha256:cd075988967c08e9f65e56a8e5d22810d5e24892ee9c1ae287f67ee2817d2cff"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/K2QM3CUAR6UH6URO5FZWVYTLFR/bundle.json","state_url":"https://pith.science/pith/K2QM3CUAR6UH6URO5FZWVYTLFR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/K2QM3CUAR6UH6URO5FZWVYTLFR/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":"2026-05-28T06:24:54Z","links":{"resolver":"https://pith.science/pith/K2QM3CUAR6UH6URO5FZWVYTLFR","bundle":"https://pith.science/pith/K2QM3CUAR6UH6URO5FZWVYTLFR/bundle.json","state":"https://pith.science/pith/K2QM3CUAR6UH6URO5FZWVYTLFR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/K2QM3CUAR6UH6URO5FZWVYTLFR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:K2QM3CUAR6UH6URO5FZWVYTLFR","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":"baa2c7cb0480bcd3d2ef16421d287227afefed16a1b702d7c241e4052b55800b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-09-19T09:27:25Z","title_canon_sha256":"08a4df421fca24a772e172323d405ea429df5238bf319f95e02618a73f00045a"},"schema_version":"1.0","source":{"id":"1509.05863","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1509.05863","created_at":"2026-05-18T01:29:44Z"},{"alias_kind":"arxiv_version","alias_value":"1509.05863v1","created_at":"2026-05-18T01:29:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1509.05863","created_at":"2026-05-18T01:29:44Z"},{"alias_kind":"pith_short_12","alias_value":"K2QM3CUAR6UH","created_at":"2026-05-18T12:29:27Z"},{"alias_kind":"pith_short_16","alias_value":"K2QM3CUAR6UH6URO","created_at":"2026-05-18T12:29:27Z"},{"alias_kind":"pith_short_8","alias_value":"K2QM3CUA","created_at":"2026-05-18T12:29:27Z"}],"graph_snapshots":[{"event_id":"sha256:cd075988967c08e9f65e56a8e5d22810d5e24892ee9c1ae287f67ee2817d2cff","target":"graph","created_at":"2026-05-18T01:29:44Z","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 study the unresolved X-ray emission in three Local Group dwarf elliptical galaxies (NGC 147, NGC 185 and NGC 205) using XMM-Newton observations, which most likely originates from a collection of weak X-ray sources, mainly cataclysmic variables and coronally active binaries. Precise knowledge of this stellar X-ray emission is crucial not only for understanding the relevant stellar astrophysics but also for disentangling and quantifying the thermal emission from diffuse hot gas in nearby galaxies.We find that the integrated X-ray emissivities of the individual dwarf ellipticals agree well wit","authors_text":"Chong Ge, Christine Jones, Q.Daniel Wang, Qiusheng Gu, Ralph P. Kraft, Shawn Roberts, William R. Forman, Xiaojie Xu, Zhiyuan Li","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-09-19T09:27:25Z","title":"X-ray emissivity of old stellar populations: a local group census"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1509.05863","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":"sha256:2fcf3e900c8afef8118eaf513922ebe695199444ac1371a01d6e086b23c78a61","target":"record","created_at":"2026-05-18T01:29:44Z","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":"baa2c7cb0480bcd3d2ef16421d287227afefed16a1b702d7c241e4052b55800b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-09-19T09:27:25Z","title_canon_sha256":"08a4df421fca24a772e172323d405ea429df5238bf319f95e02618a73f00045a"},"schema_version":"1.0","source":{"id":"1509.05863","kind":"arxiv","version":1}},"canonical_sha256":"56a0cd8a808fa87f522ee9736ae26b2c423f40900d5af67d8409b92a7e3f08b4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"56a0cd8a808fa87f522ee9736ae26b2c423f40900d5af67d8409b92a7e3f08b4","first_computed_at":"2026-05-18T01:29:44.534671Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:29:44.534671Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"bruKocObUNcHgQCM81kfNLehQYc0CPQIr+bByEOH/Xiy5C+j54hF0zKsHJS5w2PTwDzgMVn4bq0MAlFmW+2UBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:29:44.535232Z","signed_message":"canonical_sha256_bytes"},"source_id":"1509.05863","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2fcf3e900c8afef8118eaf513922ebe695199444ac1371a01d6e086b23c78a61","sha256:cd075988967c08e9f65e56a8e5d22810d5e24892ee9c1ae287f67ee2817d2cff"],"state_sha256":"0b3a4d2bcbf0197cc5c64019534cc7551000b4b9d4eb236fc37f4ceda02a275d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3BufppsM5FkiSM6qPu4DHlT8B2kwW6KMmUhFDPg/cn+D6tEQFfBsVk67T3tZbR/k5op+g0rss1hM5PYuz3/mDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T06:24:54.586729Z","bundle_sha256":"f3510c27f787dd946c001c0cb386f8000b5e8d2f0f7ddc1d5283e426e7963d23"}}