Classes of associated sources in the 4FGL-DR4 catalogue (Abdollahi et al. 2022; Ballet et al. 2023). Both associated and identified sources in the catalogue are referred as associated sources in this work.
| Physical class . | Associated sources . | Description . |
|---|---|---|
| gc | 1 | Galactic centre |
| psr | 141 | Young pulsar |
| msp | 179 | Millisecond pulsar |
| pwn | 21 | Pulsar wind nebula |
| snr | 45 | Supernova remnant |
| spp | 124 | Supernova remnant and/or pulsar wind nebula |
| glc | 34 | Globular cluster |
| sfr | 6 | Star-forming region |
| hmb | 11 | High-mass binary |
| lmb | 9 | Low-mass binary |
| bin | 10 | Binary |
| nov | 6 | Nova |
| bll | 1490 | BL Lac type of blazar |
| fsrq | 819 | FSRQ type of blazar |
| rdg | 53 | Radio galaxy |
| agn | 8 | Non-blazar active galaxy |
| ssrq | 2 | Steep spectrum radio quasar |
| css | 6 | Compact steep spectrum radio source |
| bcu | 1624 | Blazar candidate of uncertain type |
| nlsy1 | 8 | Narrow-line Seyfert 1 galaxy |
| sey | 3 | Seyfert galaxy |
| sbg | 8 | Starburst galaxy |
| gal | 6 | Normal galaxy (or part) |
| Physical class . | Associated sources . | Description . |
|---|---|---|
| gc | 1 | Galactic centre |
| psr | 141 | Young pulsar |
| msp | 179 | Millisecond pulsar |
| pwn | 21 | Pulsar wind nebula |
| snr | 45 | Supernova remnant |
| spp | 124 | Supernova remnant and/or pulsar wind nebula |
| glc | 34 | Globular cluster |
| sfr | 6 | Star-forming region |
| hmb | 11 | High-mass binary |
| lmb | 9 | Low-mass binary |
| bin | 10 | Binary |
| nov | 6 | Nova |
| bll | 1490 | BL Lac type of blazar |
| fsrq | 819 | FSRQ type of blazar |
| rdg | 53 | Radio galaxy |
| agn | 8 | Non-blazar active galaxy |
| ssrq | 2 | Steep spectrum radio quasar |
| css | 6 | Compact steep spectrum radio source |
| bcu | 1624 | Blazar candidate of uncertain type |
| nlsy1 | 8 | Narrow-line Seyfert 1 galaxy |
| sey | 3 | Seyfert galaxy |
| sbg | 8 | Starburst galaxy |
| gal | 6 | Normal galaxy (or part) |
Classes of associated sources in the 4FGL-DR4 catalogue (Abdollahi et al. 2022; Ballet et al. 2023). Both associated and identified sources in the catalogue are referred as associated sources in this work.
| Physical class . | Associated sources . | Description . |
|---|---|---|
| gc | 1 | Galactic centre |
| psr | 141 | Young pulsar |
| msp | 179 | Millisecond pulsar |
| pwn | 21 | Pulsar wind nebula |
| snr | 45 | Supernova remnant |
| spp | 124 | Supernova remnant and/or pulsar wind nebula |
| glc | 34 | Globular cluster |
| sfr | 6 | Star-forming region |
| hmb | 11 | High-mass binary |
| lmb | 9 | Low-mass binary |
| bin | 10 | Binary |
| nov | 6 | Nova |
| bll | 1490 | BL Lac type of blazar |
| fsrq | 819 | FSRQ type of blazar |
| rdg | 53 | Radio galaxy |
| agn | 8 | Non-blazar active galaxy |
| ssrq | 2 | Steep spectrum radio quasar |
| css | 6 | Compact steep spectrum radio source |
| bcu | 1624 | Blazar candidate of uncertain type |
| nlsy1 | 8 | Narrow-line Seyfert 1 galaxy |
| sey | 3 | Seyfert galaxy |
| sbg | 8 | Starburst galaxy |
| gal | 6 | Normal galaxy (or part) |
| Physical class . | Associated sources . | Description . |
|---|---|---|
| gc | 1 | Galactic centre |
| psr | 141 | Young pulsar |
| msp | 179 | Millisecond pulsar |
| pwn | 21 | Pulsar wind nebula |
| snr | 45 | Supernova remnant |
| spp | 124 | Supernova remnant and/or pulsar wind nebula |
| glc | 34 | Globular cluster |
| sfr | 6 | Star-forming region |
| hmb | 11 | High-mass binary |
| lmb | 9 | Low-mass binary |
| bin | 10 | Binary |
| nov | 6 | Nova |
| bll | 1490 | BL Lac type of blazar |
| fsrq | 819 | FSRQ type of blazar |
| rdg | 53 | Radio galaxy |
| agn | 8 | Non-blazar active galaxy |
| ssrq | 2 | Steep spectrum radio quasar |
| css | 6 | Compact steep spectrum radio source |
| bcu | 1624 | Blazar candidate of uncertain type |
| nlsy1 | 8 | Narrow-line Seyfert 1 galaxy |
| sey | 3 | Seyfert galaxy |
| sbg | 8 | Starburst galaxy |
| gal | 6 | Normal galaxy (or part) |
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