Pith Number

pith:IGEFSSGG

pith:2012:IGEFSSGG5AYE7JEWFNZCRIHFOY

not attested not anchored not stored refs pending

Extremely metal-poor gas at a redshift of 7

Adam J. Burgasser, Kathy L. Cooksey, Melodie M. Kao, Michael S. Matejek, Peter W. Sullivan, Robert A. Simcoe

arxiv:1212.0548 v1 · 2012-12-03 · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{IGEFSSGG5AYE7JEWFNZCRIHFOY}

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

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	2026-05-18T03:39:15.782839Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

41885948c6e8304fa4962b7228a0e57613fe08afc1dff60bae02a1f6ca4f05da

Aliases

arxiv: 1212.0548 · arxiv_version: 1212.0548v1 · doi: 10.48550/arxiv.1212.0548 · pith_short_12: IGEFSSGG5AYE · pith_short_16: IGEFSSGG5AYE7JEW · pith_short_8: IGEFSSGG

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/IGEFSSGG5AYE7JEWFNZCRIHFOY \
  | 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: 41885948c6e8304fa4962b7228a0e57613fe08afc1dff60bae02a1f6ca4f05da

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "41639e7d3db4ebed6e1c3073737726e67d73d8a4dc5ee59897fe9833d3cfc1ce",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2012-12-03T21:00:05Z",
    "title_canon_sha256": "53e46101cc92b7bd5373548cc240b0799885b468092806669acc53d018171d07"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1212.0548",
    "kind": "arxiv",
    "version": 1
  }
}