Pith Number

pith:EJOR6HO5

pith:1999:EJOR6HO5E5X2SJOFDZPEATWBJJ

not attested not anchored not stored refs pending

An Ultradeep High Resolution X-ray Image of M101: The X-ray Source Population in a Late-type Spiral

Q. Daniel Wang, Stefan Immler, Wolfgang Pietsch

arxiv:astro-ph/9903479 v1 · 1999-03-31 · 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{EJOR6HO5E5X2SJOFDZPEATWBJJ}

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	2026-05-18T01:07:36.496230Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

225d1f1ddd276fa925c51e5e404ec14a5f37f72b618b9d3336fd1511d668099f

Aliases

arxiv: astro-ph/9903479 · arxiv_version: astro-ph/9903479v1 · doi: 10.48550/arxiv.astro-ph/9903479 · pith_short_12: EJOR6HO5E5X2 · pith_short_16: EJOR6HO5E5X2SJOF · pith_short_8: EJOR6HO5

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/EJOR6HO5E5X2SJOFDZPEATWBJJ \
  | 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: 225d1f1ddd276fa925c51e5e404ec14a5f37f72b618b9d3336fd1511d668099f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7eefb0fb64ec95225572ed10f7bff69591d6c46e0b6e36bd2698b9ec66f7f673",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-03-31T19:55:04Z",
    "title_canon_sha256": "21aa341b1856477623577f9f97cdb46b41758d02ec4663d0209a67c8be1fb1b4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9903479",
    "kind": "arxiv",
    "version": 1
  }
}