{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:RDSVD3TNUI7VYPONYZI2UVIHWY","short_pith_number":"pith:RDSVD3TN","canonical_record":{"source":{"id":"1503.07173","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-03-24T20:00:25Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"74979717f922f5aaabb2b0501ade7190175b61facd681b95616c72c3a906fc25","abstract_canon_sha256":"e6f8dfe7b18e7316d68e016475ac15ad33883c6aa325be5e7c6a7e7d5d108e13"},"schema_version":"1.0"},"canonical_sha256":"88e551ee6da23f5c3dcdc651aa5507b61e03730e2b044067c71759a1c444dad0","source":{"kind":"arxiv","id":"1503.07173","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1503.07173","created_at":"2026-05-18T02:20:28Z"},{"alias_kind":"arxiv_version","alias_value":"1503.07173v1","created_at":"2026-05-18T02:20:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1503.07173","created_at":"2026-05-18T02:20:28Z"},{"alias_kind":"pith_short_12","alias_value":"RDSVD3TNUI7V","created_at":"2026-05-18T12:29:39Z"},{"alias_kind":"pith_short_16","alias_value":"RDSVD3TNUI7VYPON","created_at":"2026-05-18T12:29:39Z"},{"alias_kind":"pith_short_8","alias_value":"RDSVD3TN","created_at":"2026-05-18T12:29:39Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:RDSVD3TNUI7VYPONYZI2UVIHWY","target":"record","payload":{"canonical_record":{"source":{"id":"1503.07173","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-03-24T20:00:25Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"74979717f922f5aaabb2b0501ade7190175b61facd681b95616c72c3a906fc25","abstract_canon_sha256":"e6f8dfe7b18e7316d68e016475ac15ad33883c6aa325be5e7c6a7e7d5d108e13"},"schema_version":"1.0"},"canonical_sha256":"88e551ee6da23f5c3dcdc651aa5507b61e03730e2b044067c71759a1c444dad0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:20:28.129604Z","signature_b64":"jKoPPQjLaqO+ZoFa7ACqyCLxQwBgBOTRRlkPn7ubbixazuIrGefQGbVU1M4ELlaXe4F2whr9CIh3WxsLVOI7DQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"88e551ee6da23f5c3dcdc651aa5507b61e03730e2b044067c71759a1c444dad0","last_reissued_at":"2026-05-18T02:20:28.129120Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:20:28.129120Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1503.07173","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":"2026-05-18T02:20:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DWyYqpa5Lv4IcsQdQwsb7uSOThUV1QEoYmb7qaXLPNCw0JakeboTaR8ieladgBpQKfPVpCLdyG7kcRcS5h0TAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T20:42:17.870034Z"},"content_sha256":"595e23962c7eaed3a9d8cc6bd9b1a6d200273a370cae378018d87a0156f14cf0","schema_version":"1.0","event_id":"sha256:595e23962c7eaed3a9d8cc6bd9b1a6d200273a370cae378018d87a0156f14cf0"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:RDSVD3TNUI7VYPONYZI2UVIHWY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Old supernova dust factory revealed at the Galactic center","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"Joseph D. Adams, Mark R. Morris, Ryan M. Lau, Terry L. Herter, Zhiyuan Li","submitted_at":"2015-03-24T20:00:25Z","abstract_excerpt":"Dust formation in supernova ejecta is currently the leading candidate to explain the large quantities of dust observed in the distant, early Universe. However, it is unclear whether the ejecta-formed dust can survive the hot interior of the supernova remnant (SNR). We present infrared observations of ~0.02 $M_\\odot$ of warm (~100 K) dust seen near the center of the ~10,000 yr-old Sgr A East SNR at the Galactic center. Our findings signify the detection of dust within an older SNR that is expanding into a relatively dense surrounding medium ($n_e$ ~ 100 $\\mathrm{cm}^{-3}$) and has survived the "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1503.07173","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":"2026-05-18T02:20:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fM4nBzE27D4rZIAP4U6lmWbvK7Az2o6TDESuok5QrV+etUZ+0Z9hjynvFmz2yyodZhOULK+UJMmpu78gKo2IDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T20:42:17.870763Z"},"content_sha256":"489d302a38dea2ccfd04e19e5cda05fd37e5ac7bf01d59f2cf1f2a023c73af07","schema_version":"1.0","event_id":"sha256:489d302a38dea2ccfd04e19e5cda05fd37e5ac7bf01d59f2cf1f2a023c73af07"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/RDSVD3TNUI7VYPONYZI2UVIHWY/bundle.json","state_url":"https://pith.science/pith/RDSVD3TNUI7VYPONYZI2UVIHWY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/RDSVD3TNUI7VYPONYZI2UVIHWY/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":"2026-05-27T20:42:17Z","links":{"resolver":"https://pith.science/pith/RDSVD3TNUI7VYPONYZI2UVIHWY","bundle":"https://pith.science/pith/RDSVD3TNUI7VYPONYZI2UVIHWY/bundle.json","state":"https://pith.science/pith/RDSVD3TNUI7VYPONYZI2UVIHWY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/RDSVD3TNUI7VYPONYZI2UVIHWY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:RDSVD3TNUI7VYPONYZI2UVIHWY","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":"e6f8dfe7b18e7316d68e016475ac15ad33883c6aa325be5e7c6a7e7d5d108e13","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-03-24T20:00:25Z","title_canon_sha256":"74979717f922f5aaabb2b0501ade7190175b61facd681b95616c72c3a906fc25"},"schema_version":"1.0","source":{"id":"1503.07173","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1503.07173","created_at":"2026-05-18T02:20:28Z"},{"alias_kind":"arxiv_version","alias_value":"1503.07173v1","created_at":"2026-05-18T02:20:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1503.07173","created_at":"2026-05-18T02:20:28Z"},{"alias_kind":"pith_short_12","alias_value":"RDSVD3TNUI7V","created_at":"2026-05-18T12:29:39Z"},{"alias_kind":"pith_short_16","alias_value":"RDSVD3TNUI7VYPON","created_at":"2026-05-18T12:29:39Z"},{"alias_kind":"pith_short_8","alias_value":"RDSVD3TN","created_at":"2026-05-18T12:29:39Z"}],"graph_snapshots":[{"event_id":"sha256:489d302a38dea2ccfd04e19e5cda05fd37e5ac7bf01d59f2cf1f2a023c73af07","target":"graph","created_at":"2026-05-18T02:20:28Z","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":"Dust formation in supernova ejecta is currently the leading candidate to explain the large quantities of dust observed in the distant, early Universe. However, it is unclear whether the ejecta-formed dust can survive the hot interior of the supernova remnant (SNR). We present infrared observations of ~0.02 $M_\\odot$ of warm (~100 K) dust seen near the center of the ~10,000 yr-old Sgr A East SNR at the Galactic center. Our findings signify the detection of dust within an older SNR that is expanding into a relatively dense surrounding medium ($n_e$ ~ 100 $\\mathrm{cm}^{-3}$) and has survived the ","authors_text":"Joseph D. Adams, Mark R. Morris, Ryan M. Lau, Terry L. Herter, Zhiyuan Li","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-03-24T20:00:25Z","title":"Old supernova dust factory revealed at the Galactic center"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1503.07173","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":"sha256:595e23962c7eaed3a9d8cc6bd9b1a6d200273a370cae378018d87a0156f14cf0","target":"record","created_at":"2026-05-18T02:20:28Z","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":"e6f8dfe7b18e7316d68e016475ac15ad33883c6aa325be5e7c6a7e7d5d108e13","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-03-24T20:00:25Z","title_canon_sha256":"74979717f922f5aaabb2b0501ade7190175b61facd681b95616c72c3a906fc25"},"schema_version":"1.0","source":{"id":"1503.07173","kind":"arxiv","version":1}},"canonical_sha256":"88e551ee6da23f5c3dcdc651aa5507b61e03730e2b044067c71759a1c444dad0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"88e551ee6da23f5c3dcdc651aa5507b61e03730e2b044067c71759a1c444dad0","first_computed_at":"2026-05-18T02:20:28.129120Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:20:28.129120Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"jKoPPQjLaqO+ZoFa7ACqyCLxQwBgBOTRRlkPn7ubbixazuIrGefQGbVU1M4ELlaXe4F2whr9CIh3WxsLVOI7DQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:20:28.129604Z","signed_message":"canonical_sha256_bytes"},"source_id":"1503.07173","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:595e23962c7eaed3a9d8cc6bd9b1a6d200273a370cae378018d87a0156f14cf0","sha256:489d302a38dea2ccfd04e19e5cda05fd37e5ac7bf01d59f2cf1f2a023c73af07"],"state_sha256":"f41208cc235b5cb52bd4250242a877953c642ef44e89c4c2e7464e27b9d0ce77"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"T6CzgfHOz3cJqp1AQvQ9w9Ehggb7GFzlcKRcRf29FKOMsW0V/foyzCo8PAFje1zVplOxsg9+g4lqPb9QYGZ6DQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T20:42:17.874380Z","bundle_sha256":"15bebc16d440515530c0dc84c41671170ba5dcbac38c7e49ca2ffea1b8b602a0"}}