Pith Number

pith:NLDKX3XC

pith:2011:NLDKX3XCBQD74VSP55CQ5OTKGK

not attested not anchored not stored refs pending

X-Shooter GTO: Chemical analysis of a sample of EMP candidates

((1) Zentrum f\"ur Astronomie der Universit\"at Heidelberg, 2, 2), (2) GEPI, 3), (3) UPJV, (4) INAF - Osservatorio Astronomico di Padova, (5) European Southern Observatory, 6), (6) Max-Planck Institut f\"ur Astrophysik, (7) INAF - Osservatorio Astrofisico di Arcetri, (8) Universit\'e de Nice Sophia Antipolis, (9) INAF - Osservatorio Astronomico di Trieste), CNRS, E. Caffau (1, F. Hammer (2), F. Spite (2), H.-G. Ludwig (1, Laboratoire Cassiop\'e e, Landessternwarte, L. Monaco (5), L. Sbordone (1, M. Spite (2), Observatoire de la C\^ote d'Azur, Observatoire de Paris, P. Bonifacio (2), P. Fran\c{c}ois (2, P. Molaro (9), R. Cayrel (2), S. Randich (7), S. Zaggia (4), Universit\'e de Picardie Jules Verne, Univ. Paris Diderot, V. Hill (8)

arxiv:1109.0992 v1 · 2011-09-05 · astro-ph.GA · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NLDKX3XCBQD74VSP55CQ5OTKGK}

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	2026-05-18T02:00:39.491973Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6ac6abeee20c07fe564fef450eba6a3297cc2a8df1d3cb9e7ce5ea4f629f83c4

Aliases

arxiv: 1109.0992 · arxiv_version: 1109.0992v1 · doi: 10.48550/arxiv.1109.0992 · pith_short_12: NLDKX3XCBQD7 · pith_short_16: NLDKX3XCBQD74VSP · pith_short_8: NLDKX3XC

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/NLDKX3XCBQD74VSP55CQ5OTKGK \
  | 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: 6ac6abeee20c07fe564fef450eba6a3297cc2a8df1d3cb9e7ce5ea4f629f83c4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d2a7b14a5ed97d4e49ce273a4367498a1cb79305fc942ca0e6e09a9fc6efa2b8",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2011-09-05T20:00:02Z",
    "title_canon_sha256": "8a93a85eb463549c6000db80148e679699d69f739194fe96e4194abefd6b357e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1109.0992",
    "kind": "arxiv",
    "version": 1
  }
}