Pith Number

pith:FGZOJ7BY

pith:2012:FGZOJ7BY5LWR5YOTPFCW26P6DY

not attested not anchored not stored refs pending

The Swift BAT Survey Detects Two Optical Broad Line, X-ray Heavily Obscured Active Galaxies: NVSS 193013+341047 and IRAS 05218-1212

Christopher Reynolds (UMD), J. Drew Hogg (CU), Lisa M. Winter (CU), Margaret Trippe (UMD), Richard Mushotzky (UMD)

arxiv:1204.4421 v1 · 2012-04-19 · astro-ph.HE · 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{FGZOJ7BY5LWR5YOTPFCW26P6DY}

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	2026-05-18T01:57:48.567759Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

29b2e4fc38eaed1ee1d379456d79fe1e090c6e9c374e62d43a37f624fc59b7ba

Aliases

arxiv: 1204.4421 · arxiv_version: 1204.4421v1 · doi: 10.48550/arxiv.1204.4421 · pith_short_12: FGZOJ7BY5LWR · pith_short_16: FGZOJ7BY5LWR5YOT · pith_short_8: FGZOJ7BY

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/FGZOJ7BY5LWR5YOTPFCW26P6DY \
  | 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: 29b2e4fc38eaed1ee1d379456d79fe1e090c6e9c374e62d43a37f624fc59b7ba

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b48f28a09ce67a773482f414122d83bd3e9ab2a95306521bca7c9f2e69586687",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2012-04-19T17:58:57Z",
    "title_canon_sha256": "c2cff5b56c1d8826fa103696ebb01c451a54bc4a7502b7443054881fbab6b491"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1204.4421",
    "kind": "arxiv",
    "version": 1
  }
}