Pith Number

pith:SJGEWI7W

pith:2010:SJGEWI7WKLKUDTS43LTI3CZ47T

not attested not anchored not stored refs pending

Analysis of optical Fe II emission in a sample of AGN spectra

Jelena Kovacevic, Luka C. Popovic, Milan S. Dimitrijevic

arxiv:1004.2212 v2 · 2010-04-13 · 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{SJGEWI7WKLKUDTS43LTI3CZ47T}

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	2026-05-18T02:08:06.089081Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

924c4b23f652d541ce5cdae68d8b3cfcd0152139f107a1174b4d0786a276860d

Aliases

arxiv: 1004.2212 · arxiv_version: 1004.2212v2 · doi: 10.48550/arxiv.1004.2212 · pith_short_12: SJGEWI7WKLKU · pith_short_16: SJGEWI7WKLKUDTS4 · pith_short_8: SJGEWI7W

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/SJGEWI7WKLKUDTS43LTI3CZ47T \
  | 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: 924c4b23f652d541ce5cdae68d8b3cfcd0152139f107a1174b4d0786a276860d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e04c03d0ac823f8b292faad27c51864e45e048f58c0b12841404c4ba32e1392b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2010-04-13T15:14:51Z",
    "title_canon_sha256": "4caf8bcf4208a5d3f14f1b071fd1e2c4802b43ca4f1f243a74b34dff83c4145d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1004.2212",
    "kind": "arxiv",
    "version": 2
  }
}