Datasets:

juliensimon
/

iras-faint-source-catalog

iras_name large_string	ra_1950_deg float64	dec_1950_deg float64	major_axis_arcsec int64	minor_axis_arcsec int64	pos_angle_deg int64	flux_12um_jy float64	flux_12um_err_pct int64	flux_12um_quality int64	flux_25um_jy float64	flux_25um_err_pct int64	flux_25um_quality int64	flux_60um_jy float64	flux_60um_err_pct int64	flux_60um_quality int64	flux_100um_jy float64	flux_100um_err_pct int64	flux_100um_quality int64	reliability_pct int64	snr_12um float64	snr_25um float64	snr_60um float64	snr_100um float64	num_associations int64	source_type float64
F02558+0026	43.960833	0.439444	28	9	75	0.1188	21	1	0.1935	22	1	0.2338	22	3	1.081	21	1	85	null	null	6	null	0	null
F02577+0046	44.425833	0.771944	20	2	76	0.3697	9	3	0.07402	21	1	0.145	23	1	0.6294	22	1	99	14	null	null	null	1	1
F02596+0033	44.905	0.552222	26	4	77	0.1548	15	3	0.2318	23	1	0.1149	22	1	0.6228	21	1	97	6.8	null	null	null	0	null
F02598+0047	44.960833	0.786389	20	6	77	0.07459	21	1	0.1679	22	1	0.3874	12	3	1.233	22	1	99	null	null	9.6	null	3	2
F03012+0049	45.320833	0.825	12	1	77	1.144	5	3	0.3211	12	3	0.1754	23	1	0.9623	23	1	99	51	10	null	null	3	9
F03005+0110	45.144167	1.171389	16	2	77	0.4304	7	3	0.1976	23	1	0.2603	23	1	2.377	22	1	99	18	null	null	null	2	9
F02538+0040	43.465833	0.675833	22	7	76	0.1386	23	1	0.1224	22	1	0.3148	13	3	1.088	21	2	99	null	null	8	5	4	10
F02528+0109	43.2225	1.154167	15	2	75	0.562	6	3	0.1506	24	1	0.1905	24	1	0.7864	22	1	99	25	null	null	null	2	9
F02528+0111	43.204167	1.190556	25	8	75	0.07276	21	1	0.1011	21	1	0.2701	16	3	0.7281	22	1	92	null	null	6.7	null	0	null
F02541+0120	43.530833	1.343333	22	6	76	0.095	22	1	0.1535	22	1	0.368	13	3	1.69	24	1	99	null	null	8.9	null	0	null
F02568+0127	44.210417	1.453333	26	3	76	0.405	10	3	0.1548	24	1	0.1643	24	1	1.382	23	1	99	12	null	null	null	1	1
F02589+0134	44.736667	1.570833	19	3	77	0.2295	10	3	0.1086	23	1	0.1293	22	1	1.071	23	1	99	11	null	null	null	2	9
F02565+0125	44.138333	1.431667	27	8	76	0.1102	23	1	0.2308	22	1	0.2952	23	3	1.043	25	2	96	null	null	7.2	4.1	0	null
F03020+0140	45.510417	1.669722	12	1	77	1.633	4	3	0.4209	9	3	0.1054	22	1	1.107	22	1	99	90	13	null	null	3	9
F03027+0142	45.67875	1.703611	22	3	77	0.1784	12	3	0.07898	21	1	0.1484	21	1	0.828	19	1	99	9.2	null	null	null	1	1
F03038+0146	45.964583	1.778611	25	3	77	0.2066	16	3	0.1699	21	1	0.1464	20	1	1.423	19	1	99	8.4	null	null	null	2	1
F03040+0153	46.015417	1.889444	23	3	77	0.2457	15	3	0.265	22	1	0.4594	23	1	7.672	22	1	99	10	null	null	null	2	9
F03038+0152	45.965833	1.882222	21	6	77	0.1127	22	1	0.1486	21	1	0.4034	12	3	6.437	23	1	99	null	null	8.7	null	0	null
F03058+0154	46.466667	1.916111	17	5	78	0.1055	24	2	0.09532	24	1	0.9144	8	3	3.196	13	2	99	4.5	null	19	8	3	10
F03041+0157	46.047083	1.960556	23	7	77	0.1103	23	1	0.1093	23	1	0.361	14	3	5.321	24	1	96	null	null	7.8	null	1	8
F03035+0209	45.88125	2.162778	17	2	77	0.4254	7	3	0.2322	23	1	0.2503	22	1	2.815	21	1	99	20	null	null	null	2	9
F02599+0200	44.999167	2.000278	16	4	77	0.09035	21	1	0.1726	22	1	1.107	6	3	2.718	12	2	99	null	null	27	9.2	6	10
F03011+0201	45.292917	2.0175	26	8	77	0.07096	20	1	0.09895	22	1	0.2609	17	3	1.014	19	1	84	null	null	6.1	null	0	null
F03027+0211	45.68375	2.185556	14	4	77	0.08581	28	2	0.1573	23	2	1.213	6	3	2.114	17	2	99	3.9	4.5	27	6.1	4	10
F02587+0221	44.679167	2.352778	24	7	76	0.07653	21	1	0.1644	22	1	0.3307	14	3	1.573	21	1	98	null	null	7.8	null	0	null
F03020+0230	45.502083	2.509722	19	6	77	0.09285	22	1	0.09479	22	1	0.4125	12	3	2.339	22	1	99	null	null	9	null	1	8
F03026+0318	45.659583	3.302222	15	5	77	0.1043	22	1	0.1774	22	1	0.7485	8	3	1.357	27	2	99	null	null	16	3.8	1	8
F02528+0117	43.21125	1.298611	29	9	75	0.07962	23	1	0.1691	23	1	0.2282	19	3	0.9343	23	1	81	null	null	5.6	null	0	null
F02534+0126	43.355	1.438333	23	7	75	0.07144	23	1	0.08472	21	1	0.3054	14	3	1.312	23	1	96	null	null	7.3	null	0	null
F02528+0125	43.21375	1.423056	25	8	75	0.133	24	1	0.1457	28	2	0.2759	16	3	0.8993	23	1	92	null	3.6	6.7	null	0	null
F02520+0142	43.015417	1.700833	19	6	75	0.06906	23	1	0.1424	22	1	0.4022	11	3	1.18	20	2	99	null	null	9.8	5.2	1	8
F02510+0146	42.764583	1.767222	17	2	75	0.8108	6	3	0.1811	20	2	0.1424	25	1	0.6511	23	1	99	34	5.2	null	null	2	9
F02508+0153	42.70375	1.888611	22	7	75	0.08856	23	1	0.09271	21	1	0.3134	14	3	1.062	22	2	98	null	null	7.7	4.6	1	8
F02539+0201	43.4975	2.033333	20	6	75	0.09535	23	1	0.09688	23	1	0.4664	10	3	1.297	24	1	99	null	null	11	null	1	2
F02546+0209	43.6625	2.151944	22	6	75	0.08123	22	1	0.173	23	1	0.3842	12	3	1.071	23	1	99	null	null	8.9	null	1	8
F02560+0155	44.00625	1.921111	18	2	75	0.8159	6	3	0.2189	24	2	0.1776	25	1	0.7763	24	1	99	30	5.4	null	null	2	9
F02552+0206	43.822917	2.114722	23	6	75	0.1293	23	1	0.1413	23	1	0.3856	12	3	0.8063	24	1	99	null	null	9	null	0	null
F02530+0205	43.274583	2.093056	23	7	75	0.06141	23	1	0.1863	24	1	0.3282	14	3	1.182	23	1	97	null	null	7.5	null	0	null
F02529+0211	43.2425	2.1925	10	2	76	0.1401	25	2	0.7159	8	3	2.654	5	3	1.421	19	2	99	5.4	19	60	5.5	1	8
F02519+0210	42.98625	2.178333	23	7	75	0.09175	23	1	0.1116	22	1	0.3089	15	3	0.6784	23	1	97	null	null	7.2	null	1	2
F02555+0229	43.895417	2.493056	25	4	75	0.203	17	3	0.1353	23	1	0.1344	23	1	0.5527	22	1	99	7.5	null	null	null	0	null
F02545+0234	43.636667	2.572222	17	5	75	0.1149	24	1	0.0798	22	1	0.7857	8	3	2.322	14	2	99	null	null	17	7.7	5	10
F02550+0237	43.76	2.619722	23	7	75	0.1386	23	1	0.1728	22	1	0.3835	13	3	1.453	23	1	97	null	null	8.4	null	0	null
F02484+0154	42.102917	1.913611	27	4	75	0.1686	28	3	0.1664	24	1	0.1576	23	1	0.7673	22	1	97	6.7	null	null	null	1	1
F02487+0158	42.184583	1.966667	11	1	75	4.803	5	3	1.128	6	3	0.2395	17	3	1.493	25	1	99	210	32	6.2	null	5	9
F02512+0205	42.813333	2.084444	17	6	75	0.09974	24	1	0.1217	22	1	0.4528	10	3	1.619	23	1	99	null	null	11	null	4	10
F02485+0223	42.142083	2.386667	25	7	75	0.0759	23	1	0.1265	24	1	0.2831	15	3	0.9049	24	2	96	null	null	7.1	4.2	3	2
F02525+0247	43.135	2.790556	15	2	75	0.6042	6	3	0.1866	25	1	0.2061	24	1	0.9574	23	1	99	26	null	null	null	3	9
F02514+0245	42.861667	2.758889	13	4	75	0.1143	26	2	0.2045	28	2	1.416	6	3	3.423	10	2	99	4.4	5.2	31	12	5	10
F02572+0234	44.309583	2.573056	11	2	76	0.1658	15	3	0.6249	12	3	3.687	5	3	5.602	7	2	99	7	18	82	18	7	10
F02572+0253	44.305833	2.884444	18	5	76	0.1094	22	1	0.169	22	1	0.5561	9	3	1.861	18	2	99	null	null	12	5.9	3	10
F02580+0315	44.524583	3.265556	26	4	76	0.1592	15	3	0.09893	21	1	0.1331	22	1	0.8798	20	1	98	7	null	null	null	0	null
F02584+0321	44.606667	3.363056	21	3	76	0.2305	11	3	0.124	23	1	0.1557	21	1	0.8739	20	1	99	11	null	null	null	0	null
F02525+0317	43.149167	3.289444	29	5	75	0.1616	20	3	0.1562	25	1	0.1697	24	1	0.8205	21	1	95	6	null	null	null	1	1
F02523+0326	43.095417	3.435556	28	8	75	0.06502	23	1	0.186	24	1	0.293	17	3	2.019	24	1	80	null	null	6.2	null	0	null
F02557+0339	43.939167	3.661111	29	8	75	0.08602	23	1	0.186	24	1	0.3051	16	3	1.237	28	2	85	null	null	6.5	3.6	4	10
F02579+0351	44.481667	3.857778	24	7	76	0.08189	21	1	0.2006	22	1	0.3684	13	3	1.312	21	1	98	null	null	8.1	null	1	8
F02596+0353	44.915	3.894167	9	1	76	233.5	4	3	56.37	5	3	8.721	4	3	2.207	16	2	99	11,000	1,700	190	6.6	6	9
F03065+0239	46.631667	2.655556	19	2	77	0.6451	7	3	0.1711	24	1	0.1887	22	1	1.498	23	1	99	25	null	null	null	2	9
F03052+0257	46.306667	2.955278	25	8	77	0.08208	22	1	0.1065	22	1	0.3366	16	3	1.642	25	2	89	null	null	6.8	4	3	2
F03070+0411	46.757917	4.195	12	1	77	5.255	5	3	1.43	6	3	0.2903	19	2	1.314	24	1	99	230	41	5.3	null	4	9
F03144+0327	48.605833	3.466667	18	5	78	0.1222	24	1	0.1751	24	1	0.8314	7	3	1.853	16	2	99	null	null	19	6.5	2	10
F03102+0431	47.5575	4.521111	16	5	77	0.0955	29	2	0.1497	25	1	0.732	8	3	3.198	14	2	99	3.5	null	15	7.8	6	10
F03089+0432	47.231667	4.534444	23	3	77	0.239	11	3	0.1113	23	1	0.1417	23	1	1.493	23	1	99	9.9	null	null	null	1	1
F03058+0404	46.458333	4.08	27	8	77	0.069	22	1	0.1107	22	1	0.3501	16	3	2.029	23	2	91	null	null	6.6	4.4	1	8
F03035+0437	45.887083	4.630278	24	3	77	0.1934	12	3	0.09962	23	1	0.1256	23	1	1.107	22	1	99	8.8	null	null	null	2	3
F03045+0449	46.148333	4.826944	19	2	77	0.6179	6	3	0.1931	24	1	0.2491	23	1	2.352	22	1	99	26	null	null	null	2	9
F03045+0452	46.14	4.868333	31	9	77	0.09519	20	1	0.1207	22	1	0.3067	19	3	2.057	24	2	80	null	null	5.5	4.2	0	null
F03059+0508	46.496667	5.135556	27	9	77	0.06784	23	1	0.07105	23	1	0.3391	18	3	1.422	24	1	82	null	null	5.7	null	0	null
F03006+0404	45.157083	4.08	20	6	77	0.08871	22	1	0.1975	22	1	0.4442	11	3	2.155	21	1	99	null	null	9.7	null	2	10
F02597+0409	44.939583	4.157778	26	4	76	0.157	19	3	0.157	22	1	0.1851	23	1	1.241	22	1	98	7.3	null	null	null	2	1
F03004+0411	45.10875	4.192778	15	5	77	0.1076	24	1	0.1587	26	2	1	12	3	2.595	24	1	99	null	4.9	22	null	2	10
F03007+0417	45.192083	4.294444	18	6	77	0.1134	22	1	0.1584	22	1	0.5681	9	3	1.648	23	2	99	null	null	12	4.4	4	10
F03010+0420	45.252917	4.339167	20	6	77	0.05914	21	1	0.1761	22	1	0.4593	11	3	1.784	21	1	99	null	null	9.7	null	0	null
F03035+0501	45.889583	5.020833	26	8	77	0.07891	23	1	0.1649	22	1	0.3396	17	3	2.079	24	2	88	null	null	6.3	4.3	1	8
F03037+0507	45.93125	5.123056	27	4	77	0.2171	16	3	0.1754	24	1	0.2173	23	1	1.556	23	1	99	8.3	null	null	null	1	1
F03004+0512	45.103333	5.203611	24	8	77	0.08953	22	1	0.1128	22	1	0.3406	15	3	1.775	21	1	94	null	null	6.9	null	0	null
F03039+0525	45.980417	5.432222	22	3	77	0.2423	11	3	0.1819	24	1	0.1793	23	1	1.507	25	1	99	11	null	null	null	1	1
F03077+0501	46.927083	5.018056	23	7	77	0.09064	24	1	0.163	24	1	0.4754	13	3	2.902	23	1	99	null	null	8.1	null	0	null
F03119+0520	47.985417	5.334722	23	7	77	0.126	23	1	0.1475	24	1	0.4564	13	3	1.482	20	1	99	null	null	8.6	null	1	8
F03125+0531	48.145	5.520833	20	5	77	0.106	24	1	0.2147	23	1	0.6816	10	3	4.034	23	1	99	null	null	13	null	1	8
F03140+0549	48.51125	5.818333	21	7	77	0.09088	24	1	0.1125	23	1	0.4482	13	3	5.384	23	1	95	null	null	8.1	null	1	2
F03054+0520	46.374583	5.335278	29	4	77	0.1786	22	3	0.1111	24	1	0.1423	21	1	0.7942	21	1	98	7.1	null	null	null	1	1
F03106+0614	47.656667	6.238056	24	3	77	0.2142	12	3	0.1622	24	1	0.2177	23	1	0.6762	23	1	99	9	null	null	null	2	1
F03097+0628	47.44375	6.473611	11	1	77	4.703	5	3	1.074	6	3	0.3116	26	1	1.652	24	1	99	190	33	null	null	6	9
F03084+0640	47.1225	6.678056	23	3	77	0.3172	15	3	0.1589	25	1	0.2142	23	1	1.703	23	1	99	12	null	null	null	1	1
F02484+0245	42.107083	2.761667	27	7	75	0.09476	23	1	0.1192	24	1	0.2975	15	3	2.351	23	1	96	null	null	7.2	null	0	null
F02451+0257	41.299583	2.956944	22	6	75	0.08312	22	1	0.1767	23	1	0.3915	11	3	1.062	19	2	99	null	null	10	5.6	5	3
F02466+0253	41.665	2.895833	33	9	75	0.06455	22	1	0.101	22	1	0.2171	20	3	1.098	22	1	80	null	null	5.5	null	0	null
F02463+0257	41.594167	2.961389	14	3	75	0.1633	17	3	0.1301	26	2	1.001	10	3	3.639	7	2	99	6	4	26	18	5	10
F02503+0321	42.595833	3.351944	18	2	75	0.4293	7	3	0.1909	24	1	0.1567	22	1	0.8175	21	1	99	19	null	null	null	2	9
F02477+0315	41.929583	3.263889	29	8	74	0.1047	23	1	0.1269	22	1	0.2602	17	3	1.067	23	1	88	null	null	6.3	null	0	null
F02483+0319	42.099167	3.320556	14	4	75	0.09193	23	2	0.1706	23	2	1.775	5	3	3.106	8	2	99	4.5	5	42	14	4	10
F02477+0340	41.935833	3.680278	29	9	74	0.09964	23	1	0.1712	23	1	0.2334	19	3	0.5629	22	1	80	null	null	5.5	null	2	4
F02432+0301	40.802083	3.020556	18	4	75	0.1627	26	1	0.1657	27	2	0.8676	8	3	1.953	10	2	99	null	3.9	23	11	3	10
F02428+0312	40.72	3.203889	33	9	75	0.07482	21	1	0.1177	21	1	0.2084	20	3	0.6084	29	2	81	null	null	5.5	3.5	0	null
F02438+0323	40.95375	3.396944	15	4	75	0.1106	23	2	0.1769	25	2	0.8836	7	3	3.157	8	2	99	4.5	4.1	23	17	6	10
F02460+0346	41.50125	3.773611	27	9	75	0.06755	22	1	0.1307	22	1	0.2436	24	3	0.9388	24	1	84	null	null	5.9	null	0	null
F02445+0404	41.134583	4.067778	26	8	74	0.07811	22	1	0.1791	24	1	0.2662	17	3	1.617	23	1	88	null	null	6.3	null	0	null
F02516+0334	42.917083	3.568056	24	7	75	0.06626	22	1	0.09206	22	1	0.3553	14	3	0.8632	22	1	95	null	null	7.5	null	0	null

End of preview. Expand in Data Studio

IRAS Faint Source Catalog

All-sky infrared survey mosaic showing the Milky Way in infrared light

Credit: NASA/GSFC

Part of a dataset collection on Hugging Face.

Dataset description

The IRAS Faint Source Catalog (FSC), version 2.0, contains 173,044 infrared point sources detected by the Infrared Astronomical Satellite (IRAS) at 12, 25, 60, and 100 micrometres. Published by Moshir et al. (1992), the FSC extends the IRAS Point Source Catalog to fainter flux levels by applying more stringent processing at the cost of sky coverage (~75% of sky, avoiding the galactic plane and regions of high infrared cirrus).

IRAS was a joint NASA/Netherlands/UK mission that performed the first sensitive all-sky survey in the mid-infrared (August 1983 – November 1983). Its four photometric bands — 12, 25, 60, and 100 μm — probed thermal emission from warm dust, revealing a zoo of previously hidden astronomical objects: ultraluminous infrared galaxies (ULIRGs) driven by starbursts and AGN, proto-planetary debris disks around main-sequence stars, asymptotic giant branch (AGB) stars with dust shells, and the large-scale structure of the interstellar medium through infrared cirrus emission.

The four IRAS bands trace progressively cooler dust: 12 μm traces hot dust and PAH emission from star-forming regions; 25 μm traces warm circumstellar dust around evolved stars; 60 μm traces cool dust in star-forming regions and starburst galaxies; 100 μm traces cold interstellar dust (T ~ 20–30 K). The colour ratios between bands (e.g., F60/F25, F100/F60) are powerful diagnostics for classifying the dominant heating source.

This dataset fills the mid-infrared gap in the collection: no other dataset covers all-sky mid-IR point sources across all source types. It serves as the reference catalog for identifying infrared counterparts of radio, optical, and X-ray sources, and for building multiwavelength SEDs.

This dataset is suitable for tabular classification tasks.

Schema

Column	Type	Description	Sample	Null %
`iras_name`	str	IRAS source designation in format FHHMM.m+DDMM (prefix F = faint catalog)	F02558+0026	0.0%
`ra_1950_deg`	float64	Right ascension (B1950 epoch, degrees) — note: 1950 epoch, not J2000	43.960833333333326	0.0%
`dec_1950_deg`	float64	Declination (B1950 epoch, degrees) — note: 1950 epoch, not J2000	0.4394444444444443	0.0%
`major_axis_arcsec`	int64	Semi-major axis of 95% confidence position ellipse (arcsec)	28	0.0%
`minor_axis_arcsec`	int64	Semi-minor axis of 95% confidence position ellipse (arcsec)	9	0.0%
`pos_angle_deg`	int64	Position angle of major axis east of north (degrees)	75	0.0%
`flux_12um_jy`	float64	Flux density at 12 μm in Jansky (1 Jy = 10⁻²⁶ W/m²/Hz)	0.1188	0.0%
`flux_12um_err_pct`	int64	Percentage uncertainty on flux_12um_jy	21	0.0%
`flux_12um_quality`	int64	Flux quality at 12 μm: 1=high quality, 2=moderate, 3=uncertain, 0=upper limit	1	0.0%
`flux_25um_jy`	float64	Flux density at 25 μm in Jansky	0.1935	0.0%
`flux_25um_err_pct`	int64	Percentage uncertainty on flux_25um_jy	22	0.0%
`flux_25um_quality`	int64	Flux quality at 25 μm: 1=high quality, 2=moderate, 3=uncertain, 0=upper limit	1	0.0%
`flux_60um_jy`	float64	Flux density at 60 μm in Jansky — dominant band for cool dust emission	0.2338	0.0%
`flux_60um_err_pct`	int64	Percentage uncertainty on flux_60um_jy	22	0.0%
`flux_60um_quality`	int64	Flux quality at 60 μm: 1=high quality, 2=moderate, 3=uncertain, 0=upper limit	3	0.0%
`flux_100um_jy`	float64	Flux density at 100 μm in Jansky — dominant band for cold ISM dust	1.081	0.0%
`flux_100um_err_pct`	int64	Percentage uncertainty on flux_100um_jy	21	0.0%
`flux_100um_quality`	int64	Flux quality at 100 μm: 1=high quality, 2=moderate, 3=uncertain, 0=upper limit	1	0.0%
`reliability_pct`	int64	Source reliability percentage (0–99); ≥90 indicates high-confidence point source	85	0.0%
`snr_12um`	float64	Signal-to-noise ratio at 12 μm	14.0	33.4%
`snr_25um`	float64	Signal-to-noise ratio at 25 μm	10.0	65.6%
`snr_60um`	float64	Signal-to-noise ratio at 60 μm	6.0	59.1%
`snr_100um`	float64	Signal-to-noise ratio at 100 μm	5.0	80.1%
`num_associations`	int64	Number of counterpart associations in the IRAS Association File	0	0.0%
`source_type`	float64	Source type flag: 1=point source, 2=small extended, 0=no flux at any band	1.0	33.4%

Quick stats

173,044 mid-infrared sources across 12, 25, 60 and 100 μm bands
57,845 high-quality 12 μm detections; 102,262 high-quality 60 μm detections
Median 60 μm flux: 0.215 Jy — covers both galactic and extragalactic populations
Coordinates in B1950 epoch; ~75% sky coverage (galactic plane excluded)

Usage

from datasets import load_dataset

ds = load_dataset("juliensimon/iras-faint-source-catalog", split="train")
df = ds.to_pandas()

from datasets import load_dataset

ds = load_dataset("juliensimon/iras-faint-source-catalog", split="train")
df = ds.to_pandas()

# Colour-colour diagram (F25/F12 vs F60/F25) to separate star-forming galaxies
# from evolved stars and cirrus
import matplotlib.pyplot as plt
import numpy as np

good = df[
    (df["flux_12um_quality"] >= 1) &
    (df["flux_25um_quality"] >= 1) &
    (df["flux_60um_quality"] >= 1) &
    (df["flux_12um_jy"] > 0) &
    (df["flux_25um_jy"] > 0) &
    (df["flux_60um_jy"] > 0)
]
log_f25_f12 = np.log10(good["flux_25um_jy"] / good["flux_12um_jy"])
log_f60_f25 = np.log10(good["flux_60um_jy"] / good["flux_25um_jy"])

plt.figure(figsize=(8, 7))
plt.hexbin(log_f25_f12, log_f60_f25, gridsize=60, cmap="YlOrRd", bins="log")
plt.colorbar(label="log(count)")
plt.xlabel("log(F25/F12)")
plt.ylabel("log(F60/F25)")
plt.title("IRAS FSC colour-colour diagram")
plt.show()

Data source

https://vizier.cds.unistra.fr/viz-bin/VizieR-3?-source=II/156A/main

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About the author

Created by Julien Simon — AI Operating Partner at Fortino Capital. Part of the Space Datasets collection.

Citation

@dataset{iras_faint_source_catalog,
  title = {IRAS Faint Source Catalog},
  author = {juliensimon},
  year = {2026},
  url = {https://huggingface.co/datasets/juliensimon/iras-faint-source-catalog},
  publisher = {Hugging Face}
}