Pith Number

pith:JC4PUSJ5

pith:1999:JC4PUSJ5RNGNND3C4XJDWQP3BK

not attested not anchored not stored refs pending

Very Extended X-ray and H-alpha Emission in M82: Implications for the Superwind Phenomenon

(2) Johns Hopkins, (3) NASA Goddard Space Flight Center), K. A. Weaver(3) ((1) MPE, M. D. Lehnert(1), T. M. Heckman(2)

arxiv:astro-ph/9904227 v1 · 1999-04-18 · 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{JC4PUSJ5RNGNND3C4XJDWQP3BK}

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	2026-05-18T01:07:36.461469Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

48b8fa493d8b4cd68f62e5d23b41fb0abb082be3646403c94b96426e6d4c2f68

Aliases

arxiv: astro-ph/9904227 · arxiv_version: astro-ph/9904227v1 · doi: 10.48550/arxiv.astro-ph/9904227 · pith_short_12: JC4PUSJ5RNGN · pith_short_16: JC4PUSJ5RNGNND3C · pith_short_8: JC4PUSJ5

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/JC4PUSJ5RNGNND3C4XJDWQP3BK \
  | 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: 48b8fa493d8b4cd68f62e5d23b41fb0abb082be3646403c94b96426e6d4c2f68

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "396d422606a46f8f7f2f3dafee012a39e54a0e071ef7ec16fa8c935f35c6077a",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-04-18T08:42:10Z",
    "title_canon_sha256": "5bb592f271f3ca9a3fb4403cb873e0bc9894ce837a6aea1b408fb62ff4ab19f2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9904227",
    "kind": "arxiv",
    "version": 1
  }
}