Pith Number

pith:TQFHP3O3

pith:2014:TQFHP3O3ITQ2AMFGWLLSEG3FI2

not attested not anchored not stored refs pending

A New Approach to Constrain Black Hole Spins in Active Galaxies Using Optical Reverberation Mapping

Chen Hu, Jian-Min Wang, Jin-Ming Bai, Luis C. Ho, Pu Du, Yan-Rong Li

arxiv:1408.2341 v1 · 2014-08-11 · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{TQFHP3O3ITQ2AMFGWLLSEG3FI2}

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	2026-05-18T01:42:21.985385Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9c0a77eddb44e1a030a6b2d7221b654694e1faefeb51b1002a395a1512de473b

Aliases

arxiv: 1408.2341 · arxiv_version: 1408.2341v1 · doi: 10.48550/arxiv.1408.2341 · pith_short_12: TQFHP3O3ITQ2 · pith_short_16: TQFHP3O3ITQ2AMFG · pith_short_8: TQFHP3O3

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/TQFHP3O3ITQ2AMFGWLLSEG3FI2 \
  | 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: 9c0a77eddb44e1a030a6b2d7221b654694e1faefeb51b1002a395a1512de473b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "acfe539ebc29a5d709687d2840dd499b2879eff6ac3dcf1335a910ff58ff771d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2014-08-11T07:57:13Z",
    "title_canon_sha256": "680aac2fe00ec89bc7a65f3233152781873cbbcf33d2366532b73693b9830289"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1408.2341",
    "kind": "arxiv",
    "version": 1
  }
}