Pith Number

pith:H4QXY2YL

pith:1997:H4QXY2YLWCQIE4C77MDOQGAQH7

not attested not anchored not stored refs pending

Present Epoch Plus - An X-ray Survey for Cosmology

Keith Jahoda

arxiv:astro-ph/9711287 v1 · 1997-11-24 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{H4QXY2YLWCQIE4C77MDOQGAQH7}

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	2026-05-18T01:40:16.455886Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3f217c6b0bb0a082705ffb06e818103fe35aa70dfcc4392552ea112e96ff9e12

Aliases

arxiv: astro-ph/9711287 · arxiv_version: astro-ph/9711287v1 · doi: 10.48550/arxiv.astro-ph/9711287 · pith_short_12: H4QXY2YLWCQI · pith_short_16: H4QXY2YLWCQIE4C7 · pith_short_8: H4QXY2YL

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/H4QXY2YLWCQIE4C77MDOQGAQH7 \
  | 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: 3f217c6b0bb0a082705ffb06e818103fe35aa70dfcc4392552ea112e96ff9e12

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1c166bf5f5843d8a7902250f7e3f1762431544eaeb7c5232a94ecb16e24ad84b",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1997-11-24T21:31:38Z",
    "title_canon_sha256": "50fd81b1800235a799320368bd70e3551d04f119ed0a97a0be8fcc14c0c061b1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9711287",
    "kind": "arxiv",
    "version": 1
  }
}