Pith Number

pith:SSBRYJ6Q

pith:2001:SSBRYJ6QR7W7KDZYLFSKPK2BN6

not attested not anchored not stored refs pending

The Obscuring Starburst of NGC 6221 and Implications for the Hard X-ray Background

Jr. (JHU), K. A. Weaver (JHU/GSFC), N. A. Levenson (JHU), R. Cid Fernandes, T. M. Heckman (JHU), T. Storchi-Bergmann (UFRGS)

arxiv:astro-ph/0104316 v1 · 2001-04-18 · 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{SSBRYJ6QR7W7KDZYLFSKPK2BN6}

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	2026-05-18T03:47:51.755296Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

94831c27d08fedf50f385964a7ab416f891b967f1e77732b5f3098f1314f1c00

Aliases

arxiv: astro-ph/0104316 · arxiv_version: astro-ph/0104316v1 · doi: 10.48550/arxiv.astro-ph/0104316 · pith_short_12: SSBRYJ6QR7W7 · pith_short_16: SSBRYJ6QR7W7KDZY · pith_short_8: SSBRYJ6Q

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/SSBRYJ6QR7W7KDZYLFSKPK2BN6 \
  | 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: 94831c27d08fedf50f385964a7ab416f891b967f1e77732b5f3098f1314f1c00

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e972fe57949d8f7a0b87793b9bfcbdabb15b70cd9fc4772b305e115d1f54fe51",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2001-04-18T23:11:45Z",
    "title_canon_sha256": "ec1138f4111984b5b5ef75ada27639f7367563cd60bb4f412eecaf361b671230"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0104316",
    "kind": "arxiv",
    "version": 1
  }
}