Pith Number

pith:P227VCLI

pith:2007:P227VCLIWWBDCW5PYSEOOJNDP7

not attested not anchored not stored refs pending

The transverse proximity effect in spectral hardness on the line of sight towards HE 2347-4342

(2) Hamburger Sternwarte, 3), (3) Universit\"at Potsdam), A. Dall'Aglio (1) ((1) Astrophysikalisches Institut Potsdam, C. Fechner (2, G. Worseck (1), L. Wisotzki (1)

arxiv:0704.0187 v2 · 2007-04-02 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{P227VCLIWWBDCW5PYSEOOJNDP7}

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	2026-05-18T04:09:24.280346Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7eb5fa8968b582315bafc488e725a37fcf10ca0380d024de91660722e1467cc1

Aliases

arxiv: 0704.0187 · arxiv_version: 0704.0187v2 · doi: 10.48550/arxiv.0704.0187 · pith_short_12: P227VCLIWWBD · pith_short_16: P227VCLIWWBDCW5P · pith_short_8: P227VCLI

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/P227VCLIWWBDCW5PYSEOOJNDP7 \
  | 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: 7eb5fa8968b582315bafc488e725a37fcf10ca0380d024de91660722e1467cc1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c27d77b849ee3e8273c90c2b755448697285a08e499424754d2f74bee7ab6cd5",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2007-04-02T13:31:00Z",
    "title_canon_sha256": "cb224ac7540fd450ead4d10c43bae743153ad207868b89a1b5782c1fa6df413c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0704.0187",
    "kind": "arxiv",
    "version": 2
  }
}