Pith Number

pith:3YQEXB37

pith:2011:3YQEXB37K3AKCMC3YJX2UWWJZY

not attested not anchored not stored refs pending

The extinction curves of star-forming regions from z=0.1 to 6.7 using GRB afterglow spectroscopy

(2) Univ. of Iceland), Antonio de Ugarte Postigo (1) ((1) DARK, Daniele Malesani (1), Darach Watson (1), Johan P. U. Fynbo (1), Pall Jakobsson (2), Tayyaba Zafar (1)

arxiv:1102.1469 v3 · 2011-02-07 · 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{3YQEXB37K3AKCMC3YJX2UWWJZY}

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	2026-05-18T02:22:39.852406Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

de204b877f56c0a1305bc26faa5ac9ce2f3cbc66e89922e04b8f7af0f0e64a4d

Aliases

arxiv: 1102.1469 · arxiv_version: 1102.1469v3 · doi: 10.48550/arxiv.1102.1469 · pith_short_12: 3YQEXB37K3AK · pith_short_16: 3YQEXB37K3AKCMC3 · pith_short_8: 3YQEXB37

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/3YQEXB37K3AKCMC3YJX2UWWJZY \
  | 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: de204b877f56c0a1305bc26faa5ac9ce2f3cbc66e89922e04b8f7af0f0e64a4d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fee2e2b416a7c3079d6ea4ac815fa66921403cf8e9d957f26f36c84e2f233dab",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2011-02-07T23:35:16Z",
    "title_canon_sha256": "1de802659f987686dc1079d9edcbdf8857034e39dc56b42b251de9d8bf2d51ae"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1102.1469",
    "kind": "arxiv",
    "version": 3
  }
}