Pith Number

pith:DDVU5VHO

pith:2004:DDVU5VHOYL73RVQCJTOAORWH7S

not attested not anchored not stored refs pending

Discovery of high-amplitude X-ray variability in the Seyfert-LINER transition galaxy NGC7589

D. Xu (3), J.P. Osborne (4), M.G. Watson (4), R.G. McMahon (1), St. Komossa (2), W. Yuan (1)

arxiv:astro-ph/0408069 v1 · 2004-08-03 · 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{DDVU5VHOYL73RVQCJTOAORWH7S}

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	2026-07-04T16:44:26.154361Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

18eb4ed4eec2ffb8d6024cdc0746c7fc91bc132151f524c1b77f2268eafd878f

Aliases

arxiv: astro-ph/0408069 · arxiv_version: astro-ph/0408069v1 · doi: 10.48550/arxiv.astro-ph/0408069 · pith_short_12: DDVU5VHOYL73 · pith_short_16: DDVU5VHOYL73RVQC · pith_short_8: DDVU5VHO

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/DDVU5VHOYL73RVQCJTOAORWH7S \
  | 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: 18eb4ed4eec2ffb8d6024cdc0746c7fc91bc132151f524c1b77f2268eafd878f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0d5370b4b3bac79c98d06f460d74faf8bbc62c620eb32c428dae1db5302cfc36",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2004-08-03T22:58:50Z",
    "title_canon_sha256": "eab264539efe43cfb379ee4245941c0266cdccde5316caac5291c6a4c88a446a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0408069",
    "kind": "arxiv",
    "version": 1
  }
}