Pith Number

pith:7PYJM77D

pith:2012:7PYJM77DMLOD3C7XTNCQTTXTJA

not attested not anchored not stored refs pending

The Extragalactic Background Light and the Gamma-ray Opacity of the Universe

Eli Dwek, Frank Krennrich

arxiv:1209.4661 v2 · 2012-09-20 · astro-ph.CO · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7PYJM77DMLOD3C7XTNCQTTXTJA}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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.

Cited by

1 paper in Pith

COSMOS-Web: Star formation along the early Hubble sequence and the evolution of dust over the redshift range 0<z<12

Receipt and verification

First computed	2026-05-18T01:54:20.402484Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fbf0967fe362dc3d8bf79b4509cef3482c2e68c1e096f19be9fb44168e3dde1f

Aliases

arxiv: 1209.4661 · arxiv_version: 1209.4661v2 · doi: 10.48550/arxiv.1209.4661 · pith_short_12: 7PYJM77DMLOD · pith_short_16: 7PYJM77DMLOD3C7X · pith_short_8: 7PYJM77D

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/7PYJM77DMLOD3C7XTNCQTTXTJA \
  | 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: fbf0967fe362dc3d8bf79b4509cef3482c2e68c1e096f19be9fb44168e3dde1f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1bab374b324ed79e8415a5d3439c7773213c384e80f502cd695ba3088d664872",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2012-09-20T20:22:48Z",
    "title_canon_sha256": "5d9964348dc4b36558118edbc26570c68e554451bd35c3b5e5df6afd942bda9d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1209.4661",
    "kind": "arxiv",
    "version": 2
  }
}