Pith Number

pith:5Y7ODZ56

pith:2009:5Y7ODZ56AVAKBZW75N5YI64J42

not attested not anchored not stored refs pending

Upper Limit on Dimming of Cosmological Sources by Intergalactic Grey Dust from the Soft X-ray Background

Abraham Loeb, Mark Dijkstra

arxiv:0902.4703 v1 · 2009-02-26 · 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{5Y7ODZ56AVAKBZW75N5YI64J42}

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	2026-05-18T02:14:38.515768Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ee3ee1e7be0540a0e6dfeb7b847b89e6939cc5e7c49cb7cd0e660afc0c131f23

Aliases

arxiv: 0902.4703 · arxiv_version: 0902.4703v1 · doi: 10.48550/arxiv.0902.4703 · pith_short_12: 5Y7ODZ56AVAK · pith_short_16: 5Y7ODZ56AVAKBZW7 · pith_short_8: 5Y7ODZ56

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/5Y7ODZ56AVAKBZW75N5YI64J42 \
  | 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: ee3ee1e7be0540a0e6dfeb7b847b89e6939cc5e7c49cb7cd0e660afc0c131f23

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3e2f7814d67f30d9fea15144432dee1b7a7f90bf3f7b27342f299f1cf5bb3bfb",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-02-26T21:13:50Z",
    "title_canon_sha256": "42e561def89ce39d9a578def17ab3112dad142a6a1a47642ab74a281d9d50661"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0902.4703",
    "kind": "arxiv",
    "version": 1
  }
}