Pith Number

pith:2VEO3FAF

pith:2012:2VEO3FAFLMVAV6P3GHLCNSVKYV

not attested not anchored not stored refs pending

A massive bubble of extremely metal poor gas around a collapsing Ly-alpha blob at z=2.54

Andrew Humphrey (CAUP, Itziar Aretxaga, Luc Binette, Montserrat Villar-Martin, Polychronis Papaderos, Portugal)

arxiv:1209.4676 v1 · 2012-09-20 · 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{2VEO3FAFLMVAV6P3GHLCNSVKYV}

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	2026-05-18T01:54:20.367543Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d548ed94055b2a0af9fb31d626caaac56da2999d34a23f41121d7a35d0f7978e

Aliases

arxiv: 1209.4676 · arxiv_version: 1209.4676v1 · doi: 10.48550/arxiv.1209.4676 · pith_short_12: 2VEO3FAFLMVA · pith_short_16: 2VEO3FAFLMVAV6P3 · pith_short_8: 2VEO3FAF

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/2VEO3FAFLMVAV6P3GHLCNSVKYV \
  | 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: d548ed94055b2a0af9fb31d626caaac56da2999d34a23f41121d7a35d0f7978e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f4bee6637522f662a0bfcc20c6af527ef27bf6494c6e507475435fd6aeb61f56",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2012-09-20T22:17:08Z",
    "title_canon_sha256": "3b0f0f23244592703933f6b8a8024cfd40934491eaacffb2753e1ee0d2465d1b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1209.4676",
    "kind": "arxiv",
    "version": 1
  }
}