Pith Number

pith:GOBXEJZJ

pith:2013:GOBXEJZJBBT533JU6KPA53K4W2

not attested not anchored not stored refs pending

Measuring the X-ray Background in the Reionization Era with First Generation 21 cm Experiments

Abraham Loeb (Harvard), Pierre Christian (Harvard)

arxiv:1305.5541 v3 · 2013-05-23 · 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{GOBXEJZJBBT533JU6KPA53K4W2}

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	2026-05-18T01:49:47.144182Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

33837227290867dded34f29e0eed5cb6bb1f39f7d5d56f7eacede932b4f59165

Aliases

arxiv: 1305.5541 · arxiv_version: 1305.5541v3 · doi: 10.48550/arxiv.1305.5541 · pith_short_12: GOBXEJZJBBT5 · pith_short_16: GOBXEJZJBBT533JU · pith_short_8: GOBXEJZJ

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/GOBXEJZJBBT533JU6KPA53K4W2 \
  | 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: 33837227290867dded34f29e0eed5cb6bb1f39f7d5d56f7eacede932b4f59165

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c07376a025db94f7f18d184c68c09f1e8317a09b00822f4eb71aef9ba5da46ec",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2013-05-23T20:00:04Z",
    "title_canon_sha256": "e3647e6da5856be9f2f22be358ffa6bfb3cae6165718fcd8ba21fd539911f7e9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1305.5541",
    "kind": "arxiv",
    "version": 3
  }
}