Pith Number

pith:7DRX7EF7

pith:2016:7DRX7EF7HR3DYEF6N7OBL6C72C

not attested not anchored not stored refs pending

Ultra metal-poor stars: Spectroscopic determination of stellar atmospheric parameters using iron Non-LTE line abundances

Anna Frebel, Bertrand Plez, Rana Ezzeddine

arxiv:1612.06309 v2 · 2016-12-19 · 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{7DRX7EF7HR3DYEF6N7OBL6C72C}

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	2026-05-18T00:33:21.974338Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f8e37f90bf3c763c10be6fdc15f85fd0acee417ad0b16fe6218b2662906b9d33

Aliases

arxiv: 1612.06309 · arxiv_version: 1612.06309v2 · doi: 10.48550/arxiv.1612.06309 · pith_short_12: 7DRX7EF7HR3D · pith_short_16: 7DRX7EF7HR3DYEF6 · pith_short_8: 7DRX7EF7

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/7DRX7EF7HR3DYEF6N7OBL6C72C \
  | 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: f8e37f90bf3c763c10be6fdc15f85fd0acee417ad0b16fe6218b2662906b9d33

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "506a8946485e744c45e0c36886c1417bdc951a5221013e1bb6cca55ec77ea412",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2016-12-19T18:49:21Z",
    "title_canon_sha256": "c14e9fa27974095ec3490d9f5e60adea8b5e4b16933fe362007d30d7d83c751c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1612.06309",
    "kind": "arxiv",
    "version": 2
  }
}