Pith Number

pith:6TDDYLRR

pith:2002:6TDDYLRREMR7JLQN6B64XNHILP

not attested not anchored not stored refs pending

Variable UV Absorption in the Seyfert 1.5 Galaxy NGC 3516: The Case for Associated UV and X-ray Absorption

D.M. Crenshaw, H. Netzer, I.M. George, J.R. Gabel, S.B. Kraemer, T.J. Turner

arxiv:astro-ph/0205389 v1 · 2002-05-22 · 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{6TDDYLRREMR7JLQN6B64XNHILP}

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	2026-05-18T01:07:44.783634Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f4c63c2e312323f4ae0df07dcbb4e85bf93fbd308aa2892a6bc5076d1aba0e7c

Aliases

arxiv: astro-ph/0205389 · arxiv_version: astro-ph/0205389v1 · doi: 10.48550/arxiv.astro-ph/0205389 · pith_short_12: 6TDDYLRREMR7 · pith_short_16: 6TDDYLRREMR7JLQN · pith_short_8: 6TDDYLRR

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/6TDDYLRREMR7JLQN6B64XNHILP \
  | 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: f4c63c2e312323f4ae0df07dcbb4e85bf93fbd308aa2892a6bc5076d1aba0e7c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2dbe099effdcd73f9626962557e5fae4d37b92702a8818acc5e82f1c31b5f04e",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2002-05-22T21:09:33Z",
    "title_canon_sha256": "cd77fc2df86c05ecf5175b7fe9f057f4dbc8265d8702310f4cc3f7bca296014f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0205389",
    "kind": "arxiv",
    "version": 1
  }
}