{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:X5ZPQXEIBNDUHGKAUAND3ACNFY","short_pith_number":"pith:X5ZPQXEI","canonical_record":{"source":{"id":"1809.01145","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-09-04T18:00:01Z","cross_cats_sorted":[],"title_canon_sha256":"56b09c0dcf055336de5af65e834aa61b9e0227e2d9ecff94ccbea5addaf3b30a","abstract_canon_sha256":"2098bf7d6ed50dcf2da7d3b9dfafdec91f74c1891bfd7015b261971a9ed35c4d"},"schema_version":"1.0"},"canonical_sha256":"bf72f85c880b47439940a01a3d804d2e2d5ef15b2c6c8d1a3548ef5025331164","source":{"kind":"arxiv","id":"1809.01145","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1809.01145","created_at":"2026-05-18T00:03:01Z"},{"alias_kind":"arxiv_version","alias_value":"1809.01145v1","created_at":"2026-05-18T00:03:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1809.01145","created_at":"2026-05-18T00:03:01Z"},{"alias_kind":"pith_short_12","alias_value":"X5ZPQXEIBNDU","created_at":"2026-05-18T12:33:01Z"},{"alias_kind":"pith_short_16","alias_value":"X5ZPQXEIBNDUHGKA","created_at":"2026-05-18T12:33:01Z"},{"alias_kind":"pith_short_8","alias_value":"X5ZPQXEI","created_at":"2026-05-18T12:33:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:X5ZPQXEIBNDUHGKAUAND3ACNFY","target":"record","payload":{"canonical_record":{"source":{"id":"1809.01145","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-09-04T18:00:01Z","cross_cats_sorted":[],"title_canon_sha256":"56b09c0dcf055336de5af65e834aa61b9e0227e2d9ecff94ccbea5addaf3b30a","abstract_canon_sha256":"2098bf7d6ed50dcf2da7d3b9dfafdec91f74c1891bfd7015b261971a9ed35c4d"},"schema_version":"1.0"},"canonical_sha256":"bf72f85c880b47439940a01a3d804d2e2d5ef15b2c6c8d1a3548ef5025331164","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:03:01.704191Z","signature_b64":"7HZKtsHVoT6fzAy7yVYwlB8INwPQqBKXsEZ+y5q+BmxKi270/u/vEY5qSiOjLgywRNBS5NrI1wnXbgFQ3Y1uDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"bf72f85c880b47439940a01a3d804d2e2d5ef15b2c6c8d1a3548ef5025331164","last_reissued_at":"2026-05-18T00:03:01.703606Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:03:01.703606Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1809.01145","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":"2026-05-18T00:03:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1aACqQW0W7Ho3bwk35YwWmA/dE4ACoK/MtyoJmU0hXLk1zbW9zl3utJwx0djxRfT5aKssK1hO2v+zJaDcKJADQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-23T00:16:45.765253Z"},"content_sha256":"8f4e0a3d0a7a896dcf15a666b821cf579ed3291119ed1fc59e04df1edfcd7778","schema_version":"1.0","event_id":"sha256:8f4e0a3d0a7a896dcf15a666b821cf579ed3291119ed1fc59e04df1edfcd7778"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:X5ZPQXEIBNDUHGKAUAND3ACNFY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Evidence for Ultra-Diffuse Galaxy `Formation' Through Galaxy Interactions","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Ananthan Karunakaran, David J. Sand, Denija Crnojevi\\'c, Dennis Zaritsky, Kristine Spekkens, Paul Bennet","submitted_at":"2018-09-04T18:00:01Z","abstract_excerpt":"We report the discovery of two ultra-diffuse galaxies (UDGs) which show clear evidence for association with tidal material and interaction with a larger galaxy halo, found during a search of the Wide portion of the Canada-France-Hawaii Telescope Legacy Survey (CFHTLS). The two new UDGs, NGC2708-Dw1 and NGC5631-Dw1, are faint ($M_g$=$-$13.7 and $-$11.8 mag), extended ($r_h$=2.60 and 2.15 kpc) and have low central surface brightness ($\\mu(g,0)$=24.9 and 27.3 mag arcsec$^{-2}$), while the stellar stream associated with each has a surface brightness $\\mu(g)$$\\gtrsim$28.2 mag arcsec$^{-2}$. These o"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1809.01145","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":"2026-05-18T00:03:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"eDXZlZd2781lISNzKd9VB5CxxBvTR3vcH1NX9lJ4a1KFYDcomZByojFaXdT12r9elcOJWwFLV0XCIvwYfjA1AQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-23T00:16:45.765655Z"},"content_sha256":"b1dda9f9107cb5cb997e87196e8970f10ee1fa30a4bc400d01027f823a2b7d4e","schema_version":"1.0","event_id":"sha256:b1dda9f9107cb5cb997e87196e8970f10ee1fa30a4bc400d01027f823a2b7d4e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/X5ZPQXEIBNDUHGKAUAND3ACNFY/bundle.json","state_url":"https://pith.science/pith/X5ZPQXEIBNDUHGKAUAND3ACNFY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/X5ZPQXEIBNDUHGKAUAND3ACNFY/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":"2026-05-23T00:16:45Z","links":{"resolver":"https://pith.science/pith/X5ZPQXEIBNDUHGKAUAND3ACNFY","bundle":"https://pith.science/pith/X5ZPQXEIBNDUHGKAUAND3ACNFY/bundle.json","state":"https://pith.science/pith/X5ZPQXEIBNDUHGKAUAND3ACNFY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/X5ZPQXEIBNDUHGKAUAND3ACNFY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:X5ZPQXEIBNDUHGKAUAND3ACNFY","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":"2098bf7d6ed50dcf2da7d3b9dfafdec91f74c1891bfd7015b261971a9ed35c4d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-09-04T18:00:01Z","title_canon_sha256":"56b09c0dcf055336de5af65e834aa61b9e0227e2d9ecff94ccbea5addaf3b30a"},"schema_version":"1.0","source":{"id":"1809.01145","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1809.01145","created_at":"2026-05-18T00:03:01Z"},{"alias_kind":"arxiv_version","alias_value":"1809.01145v1","created_at":"2026-05-18T00:03:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1809.01145","created_at":"2026-05-18T00:03:01Z"},{"alias_kind":"pith_short_12","alias_value":"X5ZPQXEIBNDU","created_at":"2026-05-18T12:33:01Z"},{"alias_kind":"pith_short_16","alias_value":"X5ZPQXEIBNDUHGKA","created_at":"2026-05-18T12:33:01Z"},{"alias_kind":"pith_short_8","alias_value":"X5ZPQXEI","created_at":"2026-05-18T12:33:01Z"}],"graph_snapshots":[{"event_id":"sha256:b1dda9f9107cb5cb997e87196e8970f10ee1fa30a4bc400d01027f823a2b7d4e","target":"graph","created_at":"2026-05-18T00:03:01Z","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 report the discovery of two ultra-diffuse galaxies (UDGs) which show clear evidence for association with tidal material and interaction with a larger galaxy halo, found during a search of the Wide portion of the Canada-France-Hawaii Telescope Legacy Survey (CFHTLS). The two new UDGs, NGC2708-Dw1 and NGC5631-Dw1, are faint ($M_g$=$-$13.7 and $-$11.8 mag), extended ($r_h$=2.60 and 2.15 kpc) and have low central surface brightness ($\\mu(g,0)$=24.9 and 27.3 mag arcsec$^{-2}$), while the stellar stream associated with each has a surface brightness $\\mu(g)$$\\gtrsim$28.2 mag arcsec$^{-2}$. These o","authors_text":"Ananthan Karunakaran, David J. Sand, Denija Crnojevi\\'c, Dennis Zaritsky, Kristine Spekkens, Paul Bennet","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-09-04T18:00:01Z","title":"Evidence for Ultra-Diffuse Galaxy `Formation' Through Galaxy Interactions"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1809.01145","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":"sha256:8f4e0a3d0a7a896dcf15a666b821cf579ed3291119ed1fc59e04df1edfcd7778","target":"record","created_at":"2026-05-18T00:03:01Z","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":"2098bf7d6ed50dcf2da7d3b9dfafdec91f74c1891bfd7015b261971a9ed35c4d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-09-04T18:00:01Z","title_canon_sha256":"56b09c0dcf055336de5af65e834aa61b9e0227e2d9ecff94ccbea5addaf3b30a"},"schema_version":"1.0","source":{"id":"1809.01145","kind":"arxiv","version":1}},"canonical_sha256":"bf72f85c880b47439940a01a3d804d2e2d5ef15b2c6c8d1a3548ef5025331164","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bf72f85c880b47439940a01a3d804d2e2d5ef15b2c6c8d1a3548ef5025331164","first_computed_at":"2026-05-18T00:03:01.703606Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:03:01.703606Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"7HZKtsHVoT6fzAy7yVYwlB8INwPQqBKXsEZ+y5q+BmxKi270/u/vEY5qSiOjLgywRNBS5NrI1wnXbgFQ3Y1uDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:03:01.704191Z","signed_message":"canonical_sha256_bytes"},"source_id":"1809.01145","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8f4e0a3d0a7a896dcf15a666b821cf579ed3291119ed1fc59e04df1edfcd7778","sha256:b1dda9f9107cb5cb997e87196e8970f10ee1fa30a4bc400d01027f823a2b7d4e"],"state_sha256":"f297a429ee5293f28bc07388f51a1a659c0d15efdb29137eeb6d5d560c20292f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MWIwFGTL1cl2dH2khvTEopuG5S2uq3MwUBTPvc3OR0xYIWabyxbQfvSDDR+u3+xYh8O4pPzXUvK65ksNuTTyBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-23T00:16:45.768700Z","bundle_sha256":"d3f94d391e44c5bc463c120d7adb66df13a9b529aa6fb0f5f2654084a1744894"}}