Pith Number

pith:CGSPAQRX

pith:2008:CGSPAQRXI2BG33TBVDZHFSZQOG

not attested not anchored not stored refs pending

Long term optical and X-ray variability of the Seyfert galaxy Markarian 79

(1) P. Uttley (1), (2) CrAO, 3), (3) Isaac Newton Institute of Chile, (4) Tokyo, (6) Michigan, (7) St. Andrews, C. M. Gaskell (5), E. Breedt (1), E. M. Cackett (6), I. M. McHardy, Japan (5) Texas, K. Horne (7), P. Ar\'evalo (1), S. G. Sergeev (2, S. Koshida (4) ((1) Southampton, T. Minezaki (4), UK, UK), Ukraine, USA, Y. Yoshii (4)

arxiv:0812.0810 v1 · 2008-12-03 · 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{CGSPAQRXI2BG33TBVDZHFSZQOG}

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	2026-05-18T04:30:35.357478Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

11a4f0423746826dee61a8f272cb30719130b21653c10493859d21bfb1009d16

Aliases

arxiv: 0812.0810 · arxiv_version: 0812.0810v1 · doi: 10.48550/arxiv.0812.0810 · pith_short_12: CGSPAQRXI2BG · pith_short_16: CGSPAQRXI2BG33TB · pith_short_8: CGSPAQRX

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/CGSPAQRXI2BG33TBVDZHFSZQOG \
  | 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: 11a4f0423746826dee61a8f272cb30719130b21653c10493859d21bfb1009d16

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d3013aa8851c3e39b945b21f6ac6bb993c0f24824613f96cbee8fb1a5350b61c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph",
    "submitted_at": "2008-12-03T21:01:16Z",
    "title_canon_sha256": "9cc5fb227b498da4df595330ba14c98ced5fa210d10cbcaf2f408c513f404c9c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0812.0810",
    "kind": "arxiv",
    "version": 1
  }
}