Pith Number

pith:IM3YIGRM

pith:2015:IM3YIGRM6X34OO7YY3RB7LJ7BW

not attested not anchored not stored refs pending

Segue 1 - A Compressed Star Formation History Before Reionization

Anna Frebel, David Webster, Joss Bland-Hawthorn

arxiv:1509.00856 v2 · 2015-09-02 · 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{IM3YIGRM6X34OO7YY3RB7LJ7BW}

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	2026-05-18T01:20:34.372226Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4337841a2cf5f7c73bf8c6e21fad3f0db057d9d4281fdf27e70218c4bee78b26

Aliases

arxiv: 1509.00856 · arxiv_version: 1509.00856v2 · doi: 10.48550/arxiv.1509.00856 · pith_short_12: IM3YIGRM6X34 · pith_short_16: IM3YIGRM6X34OO7Y · pith_short_8: IM3YIGRM

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/IM3YIGRM6X34OO7YY3RB7LJ7BW \
  | 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: 4337841a2cf5f7c73bf8c6e21fad3f0db057d9d4281fdf27e70218c4bee78b26

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7b4c4f3fa3fa33155bf0490ced73deac4363337f00cbb5af3b57d64606477936",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2015-09-02T20:04:41Z",
    "title_canon_sha256": "7f7c63e10266a7b4d3d1189d66e1d5e2771b420ca6f1ea8dc6da25e9b213ac05"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1509.00856",
    "kind": "arxiv",
    "version": 2
  }
}