Pith Number

pith:O4ZMUBGA

pith:2009:O4ZMUBGAH7S3ATSUZNUKJODUKC

not attested not anchored not stored refs pending

Probing the Balance of AGN and Star-Forming Activity in the Local Universe with ChaMP

(2) Univ. of Washington, (3) Univ. of North Dakota), Anca Constantin (1), Daryl Haggard (2), Dong-Woo Kim (1), Paul Green (1), Scott F. Anderson (2) ((1) Harvard-Smithsonian CfA, Tom Aldcroft (1), Wayne Barkhouse (3)

arxiv:0909.4086 v1 · 2009-09-22 · astro-ph.CO · 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{O4ZMUBGAH7S3ATSUZNUKJODUKC}

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	2026-05-18T02:34:28.120142Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7732ca04c03fe5b04e54cb68a4b87450acb391344710ff1640894f23fe17f8e3

Aliases

arxiv: 0909.4086 · arxiv_version: 0909.4086v1 · doi: 10.48550/arxiv.0909.4086 · pith_short_12: O4ZMUBGAH7S3 · pith_short_16: O4ZMUBGAH7S3ATSU · pith_short_8: O4ZMUBGA

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/O4ZMUBGAH7S3ATSUZNUKJODUKC \
  | 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: 7732ca04c03fe5b04e54cb68a4b87450acb391344710ff1640894f23fe17f8e3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "77fa043518b1e622cf1359e13eb5f5f29fe79ad6284a45f7b55346cd035d7bb9",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-09-22T20:13:51Z",
    "title_canon_sha256": "a194435b94220b5b1c4544b671a6c3418e96a98e2a30f24e5aa654a18778f6de"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.4086",
    "kind": "arxiv",
    "version": 1
  }
}