Pith Number

pith:Q2Y33ODA

pith:2009:Q2Y33ODAARLLAEUFM6FHN6ENGB

not attested not anchored not stored refs pending

M_BH - sigma relation in SDSS flat-spectrum radio quasars

Minfeng Gu, Xinwu Cao (SHAO), Zhaoyu Chen

arxiv:0905.2525 v1 · 2009-05-15 · astro-ph.GA

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Q2Y33ODAARLLAEUFM6FHN6ENGB}

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	2026-05-18T02:13:39.222477Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

86b1bdb8600456b01285678a76f88d307752d35338aac2720c330c32ba6c8461

Aliases

arxiv: 0905.2525 · arxiv_version: 0905.2525v1 · doi: 10.48550/arxiv.0905.2525 · pith_short_12: Q2Y33ODAARLL · pith_short_16: Q2Y33ODAARLLAEUF · pith_short_8: Q2Y33ODA

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/Q2Y33ODAARLLAEUFM6FHN6ENGB \
  | 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: 86b1bdb8600456b01285678a76f88d307752d35338aac2720c330c32ba6c8461

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "41b81365c3557e38313fc6f248bcae73ed5bec14feceb6e3f4b432f71bbb5691",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2009-05-15T11:16:51Z",
    "title_canon_sha256": "67d39aee990bb39a439c6fa47d95f494ab57d0537caa3fd2b0b4a514bda36ae1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0905.2525",
    "kind": "arxiv",
    "version": 1
  }
}