Pith Number

pith:7CAHXACF

pith:2010:7CAHXACFCLFMPH2BDCQSKPKFNQ

not attested not anchored not stored refs pending

The earliest galaxies seen in 21 cm line absorption

Andrea Ferrara, Xuelei Chen, Yidong Xu

arxiv:1009.1149 v1 · 2010-09-06 · astro-ph.CO

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Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

Cited by

1 paper in Pith

Topological Signatures of Heating and Dark Matter in the 21 cm Forest

Receipt and verification

First computed	2026-05-18T04:27:47.491936Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f8807b804512cac79f4118a1253d456c37ffea8db10f545bda97d25d2507716b

Aliases

arxiv: 1009.1149 · arxiv_version: 1009.1149v1 · doi: 10.48550/arxiv.1009.1149 · pith_short_12: 7CAHXACFCLFM · pith_short_16: 7CAHXACFCLFMPH2B · pith_short_8: 7CAHXACF

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/7CAHXACFCLFMPH2BDCQSKPKFNQ \
  | 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: f8807b804512cac79f4118a1253d456c37ffea8db10f545bda97d25d2507716b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b22878d378a720a5c735a162f336b1fcbf1d89907349094d53c6c722bb8f625b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2010-09-06T20:01:15Z",
    "title_canon_sha256": "09f339603376be157e6ed6cf73d71fc9846710d5b0b34ee8fe178b3ca0644415"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1009.1149",
    "kind": "arxiv",
    "version": 1
  }
}