Pith Number

pith:4ERHCAQY

pith:2016:4ERHCAQYF5AJLJFHOMYMSOR4DO

not attested not anchored not stored refs pending

Lyman Alpha Signatures from Direct Collapse Black Holes

David Sobral (Lancaster), Mark Dijkstra (ITA Oslo), Max Gronke (ITA Oslo)

arxiv:1602.07695 v1 · 2016-02-24 · astro-ph.GA · 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{4ERHCAQYF5AJLJFHOMYMSOR4DO}

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	2026-05-18T01:13:15.148979Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e1227102182f4095a4a77330c93a3c1b8e9db1676966fcecf91160ac78a48be4

Aliases

arxiv: 1602.07695 · arxiv_version: 1602.07695v1 · doi: 10.48550/arxiv.1602.07695 · pith_short_12: 4ERHCAQYF5AJ · pith_short_16: 4ERHCAQYF5AJLJFH · pith_short_8: 4ERHCAQY

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/4ERHCAQYF5AJLJFHOMYMSOR4DO \
  | 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: e1227102182f4095a4a77330c93a3c1b8e9db1676966fcecf91160ac78a48be4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "23d523cefc73e26b09ad9b673be1355788ac03466e058c2e98929964ccffd05d",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2016-02-24T21:00:05Z",
    "title_canon_sha256": "6ea953af948f7ab26e852445542d8d7708edfb64a3d8b5061db91756f62e50f6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1602.07695",
    "kind": "arxiv",
    "version": 1
  }
}