Pith Number

pith:E4PCMRX5

pith:2011:E4PCMRX5QQ5LPSWNPY5VFHH3LQ

not attested not anchored not stored refs pending

Ancient giants: on the farthest galaxy at z=8.6

Andrea Ferrara, Pratika Dayal

arxiv:1102.1726 v2 · 2011-02-08 · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{E4PCMRX5QQ5LPSWNPY5VFHH3LQ}

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	2026-05-18T02:03:15.161082Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

271e2646fd843ab7cacd7e3b529cfb5c2102375bd8ba2154e33f0682d8b58c84

Aliases

arxiv: 1102.1726 · arxiv_version: 1102.1726v2 · doi: 10.48550/arxiv.1102.1726 · pith_short_12: E4PCMRX5QQ5L · pith_short_16: E4PCMRX5QQ5LPSWN · pith_short_8: E4PCMRX5

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/E4PCMRX5QQ5LPSWNPY5VFHH3LQ \
  | 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: 271e2646fd843ab7cacd7e3b529cfb5c2102375bd8ba2154e33f0682d8b58c84

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b72df3aeb32f34db26764da22c44fb06f9f12fa8125d777deff47041830f7311",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2011-02-08T21:00:18Z",
    "title_canon_sha256": "14b34c0f72236a23174f0f16050a49d56fc6b068411b0f6e8a5266538f8b4fee"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1102.1726",
    "kind": "arxiv",
    "version": 2
  }
}