astro-legacy-archive/abs-bandpowers

ABS final power spectra

This dataset contains the final BB, EB, and EE power-spectrum tables released by the Atacama B-mode Search and served by LAMBDA. Each configuration is its source filename stem. Every table contains 13 multipole bins in source row order.

How to use

from datasets import load_dataset
dataset = load_dataset("astro-legacy-archive/abs-bandpowers", "ABS_BB_power_spec", split="train[:1]", columns=["ell", "Dl_AxA", "-Delta_AxA", "+Delta_AxA"])
row = dataset[0]
print(row["ell"], row["Dl_AxA"])

55.0 0.056933

import json
from huggingface_hub import hf_hub_download
import pyarrow.parquet as pq
path = hf_hub_download("astro-legacy-archive/abs-bandpowers", "ABS_BB_power_spec.parquet", repo_type="dataset")
print(json.loads(pq.read_schema(path).metadata[b"statistical_product"])["schema"])

astro-legacy-archive/statistical-product

Dataset structure

The source identifiers are preserved verbatim. ell is the multipole-bin centre and has no unit stated by the pinned band-power description. All other fields are in uK^2:

• Dl_AxA: ABS auto-spectrum band power.
• -Delta_AxA: lower ABS auto-spectrum error bar.
• +Delta_AxA: upper ABS auto-spectrum error bar.
• Dl_AxP: ABS cross-power spectrum with Planck 143 GHz.
• Delta_AxP: ABS cross-Planck spectrum error bar.
• Dl_PxP: Planck 143 GHz auto-spectrum band power.
• Delta_PxP: Planck auto-spectrum error bar.
• Delta_AxA: ABS auto-spectrum error bar in the EB table.

ABS_BB_power_spec and ABS_EE_power_spec contain the first seven fields after ell, in the order shown. ABS_EB_power_spec contains ell, Dl_AxA, and Delta_AxA. No symmetric error is derived from the asymmetric -Delta_AxA and +Delta_AxA fields.

Sources and integrity

• ABS_BB_power_spec.txt: source, SHA-256 e9d9106e574477fae267ea968202bc40274079c2101927700b27f8c55159c5d5 (981 bytes).
• ABS_EB_power_spec.txt: source, SHA-256 2ce95bbe1c6667df0490ce0d451de95240a1b5e3248d94115d8121cc9c809f5f (338 bytes).
• ABS_EE_power_spec.txt: source, SHA-256 3fd6b52927d8c4def29179b2f8c1267974b8527ad9c59eb28420eb43bc16a802 (976 bytes).

LAMBDA provides the ABS product table, band-power description, and transfer-function description. The spectra are cross-correlations of 82 subset maps after masking; the released values have the transfer and window functions applied.

The Field A explicit-pixel HEALPix table is mirrored separately as abs-field-a-maps. The Tau A release is a three-HDU, 201x201 ZEA image grid and remains outside this lane. Masks, response functions, simulations, and likelihoods are not sky-measurement configurations.

Licence, credit, and citation

HEASARC states verbatim:

HEASARC materials are all available freely for your use.

This is a free-use statement rather than a named formal licence.

No explicit licence is published. LAMBDA's requested credit is:

Please acknowledge Kusaka et al. (2018).

Cite Kusaka, A. et al. (2018), “Results from the Atacama B-mode Search (ABS) experiment,” Journal of Cosmology and Astroparticle Physics, 2018(09), 005, DOI 10.1088/1475-7516/2018/09/005.

Errata and requests

To report an erratum, propose a correction, or ask a question about this dataset, open a Discussion or Pull Request in its Community tab; posting requires a free Hugging Face account. Dataset requests and archive-wide questions may be posted in the README space's Community tab or the Community tab of any dataset. Confirmed corrections are made in the source conversion tools and published by rebuilding the dataset.