Pith Number

pith:XMX5DZXG

pith:2012:XMX5DZXGR4JBCHSR5WJKQCTF3N

not attested not anchored not stored refs pending

Spectral energy distributions of quasars selected in the mid-infrared

(2) Tufts, (3) NOAO, (4) Wisconsin, (5) AIP, (6) Sussex, (7) UCO/Lick), Anna Sajina (2), Danielle M. Nielsen (4), Duncan Farrah (6), Elinor L. Gates (7) ((1) NRAO, Mark Lacy (1), Potsdam, Susan E. Ridgway (3), Tanya Urrutia (5)

arxiv:1203.4521 v1 · 2012-03-20 · 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{XMX5DZXGR4JBCHSR5WJKQCTF3N}

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	2026-05-18T01:58:05.369950Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bb2fd1e6e68f12111e51ed92a80a65db592fadc1b501a06c1528e6132972914b

Aliases

arxiv: 1203.4521 · arxiv_version: 1203.4521v1 · doi: 10.48550/arxiv.1203.4521 · pith_short_12: XMX5DZXGR4JB · pith_short_16: XMX5DZXGR4JBCHSR · pith_short_8: XMX5DZXG

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/XMX5DZXGR4JBCHSR5WJKQCTF3N \
  | 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: bb2fd1e6e68f12111e51ed92a80a65db592fadc1b501a06c1528e6132972914b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cf86554e10ab0f742d283a6f139add0d752e58b64d2d94a2ed226e84724e7e7f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2012-03-20T17:28:21Z",
    "title_canon_sha256": "456b8018687fe44da8ecd57a59f016985627f23efce69b168f34a8af0593cdaa"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1203.4521",
    "kind": "arxiv",
    "version": 1
  }
}