Pith Number

pith:ZBMHZ5UB

pith:2015:ZBMHZ5UB2JG3HRHF6VTBPC77QJ

not attested not anchored not stored refs pending

Metal-Poor Stars Observed with the Magellan Telescope. III. New Extremely and Ultra Metal-Poor Stars from SDSS/SEGUE and Insights on the Formation of Ultra Metal-Poor Stars

Alexander Heger, Anna Frebel, Conrad Chan, Heather R. Jacobson, Jose M. Pena, Timothy C. Beers, Vinicius M. Placco, Young Sun Lee

arxiv:1507.03656 v1 · 2015-07-13 · astro-ph.SR · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ZBMHZ5UB2JG3HRHF6VTBPC77QJ}

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	2026-05-18T01:34:47.696679Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c8587cf681d24db3c4e5f566178bff827edd14683a4184f912c1d6fea23ecc12

Aliases

arxiv: 1507.03656 · arxiv_version: 1507.03656v1 · doi: 10.48550/arxiv.1507.03656 · pith_short_12: ZBMHZ5UB2JG3 · pith_short_16: ZBMHZ5UB2JG3HRHF · pith_short_8: ZBMHZ5UB

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/ZBMHZ5UB2JG3HRHF6VTBPC77QJ \
  | 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: c8587cf681d24db3c4e5f566178bff827edd14683a4184f912c1d6fea23ecc12

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "94cbf0cd9693275696ef0a4f58e4cd59caf29f3f2cbd9bea55721250f9ec7141",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2015-07-13T23:44:28Z",
    "title_canon_sha256": "3f69512024b141235f5831526f054169b847c7bc8e59c2a3f9fd8214b3be259b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1507.03656",
    "kind": "arxiv",
    "version": 1
  }
}