Pith Number

pith:MRUR5IGE

pith:2012:MRUR5IGEDU2AOQOALDVOUCIGU6

not attested not anchored not stored refs pending

A Substantial Mass of Cool, Metal-Enriched Gas Surrounding the Progenitors of Modern-Day Ellipticals

2), (2) Max-Planck-Institut fur Astronomie, (3) MIT Kavli Institute for Astrophysics, Joseph F. Hennawi (2), J. Xavier Prochaska (1, Robert A. Simcoe (3) ((1) UCO/Lick Observatory, Space Research), UC Santa Cruz

arxiv:1211.6131 v1 · 2012-11-26 · 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{MRUR5IGEDU2AOQOALDVOUCIGU6}

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	2026-05-18T01:52:54.699993Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

64691ea0c41d340741c058eaea0906a7be41644ce6c114b0dc0a952f69d732a1

Aliases

arxiv: 1211.6131 · arxiv_version: 1211.6131v1 · doi: 10.48550/arxiv.1211.6131 · pith_short_12: MRUR5IGEDU2A · pith_short_16: MRUR5IGEDU2AOQOA · pith_short_8: MRUR5IGE

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/MRUR5IGEDU2AOQOALDVOUCIGU6 \
  | 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: 64691ea0c41d340741c058eaea0906a7be41644ce6c114b0dc0a952f69d732a1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2d19c6b98e48528c5904503b9c0b2984414166bfa19b69ca4db6a67870799880",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2012-11-26T21:10:41Z",
    "title_canon_sha256": "e5f543c64b5b27f1c424dcfc63aa497282dc5972cbd2e9d7e536b735889d3c95"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1211.6131",
    "kind": "arxiv",
    "version": 1
  }
}