Pith Number

pith:FCM2RMA2

pith:2018:FCM2RMA2IHOWZXNQ5KBNCJRN4Y

not attested not anchored not stored refs pending

Chandra and HST Snapshots of Fossil System Progenitors

Jimmy A. Irwin, Ka-Wah Wong, Lucas E. Johnson, Raymond E. White III, Renato A. Dupke

arxiv:1806.06819 v1 · 2018-06-18 · astro-ph.GA

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{FCM2RMA2IHOWZXNQ5KBNCJRN4Y}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-17T23:56:47.816566Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2899a8b01a41dd6cddb0ea82d1262de6107c6b1a3ea693dbddd2185d267e48d7

Aliases

arxiv: 1806.06819 · arxiv_version: 1806.06819v1 · doi: 10.48550/arxiv.1806.06819 · pith_short_12: FCM2RMA2IHOW · pith_short_16: FCM2RMA2IHOWZXNQ · pith_short_8: FCM2RMA2

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/FCM2RMA2IHOWZXNQ5KBNCJRN4Y \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 2899a8b01a41dd6cddb0ea82d1262de6107c6b1a3ea693dbddd2185d267e48d7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ffc58e33ebf559eb89447d80b3b8cc057cedcc9aa6bba67d03c0b6eb6e93cd9b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2018-06-18T16:55:35Z",
    "title_canon_sha256": "b546fd45f81da1cd678a814004ce358a57e6f3670af623806a7c46c5e3ea5e29"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1806.06819",
    "kind": "arxiv",
    "version": 1
  }
}