Pith Number

pith:QIQS6JXH

pith:2010:QIQS6JXHPJIULQ73BH5ZCYXK5K

not attested not anchored not stored refs pending

The Megamaser Cosmology Project. III. Accurate Masses of Seven Supermassive Black Holes in Active Galaxies with Circumnuclear Megamaser Disks

C. Henkel, C. M. V. Impellizzeri, C. Y. Kuo, I. Zaw, J. A. Braatz, J. E. Greene, J. J. Condon, K.Y. Lo, M. J. Reid, M. Schenker

arxiv:1008.2146 v1 · 2010-08-12 · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QIQS6JXHPJIULQ73BH5ZCYXK5K}

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	2026-05-18T02:05:48.977141Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

82212f26e77a5145c3fb09fb9162eaeaad136ed926ef5c3dfa008f8011cccd61

Aliases

arxiv: 1008.2146 · arxiv_version: 1008.2146v1 · doi: 10.48550/arxiv.1008.2146 · pith_short_12: QIQS6JXHPJIU · pith_short_16: QIQS6JXHPJIULQ73 · pith_short_8: QIQS6JXH

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/QIQS6JXHPJIULQ73BH5ZCYXK5K \
  | 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: 82212f26e77a5145c3fb09fb9162eaeaad136ed926ef5c3dfa008f8011cccd61

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ad9f4c7d75648e855da3ed5ec0996088c44d9eb5263fcbadacd13082f01982d9",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2010-08-12T15:49:00Z",
    "title_canon_sha256": "7193a464795e717b6b92a197b4e3b3144de90b644ca54a1abfa96b566bf18d14"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1008.2146",
    "kind": "arxiv",
    "version": 1
  }
}