Serendipitous alerts
ABOUT
Welcome to the XMM-Newton serendipitously detected X-ray transient alerts page. You will find the latest transients to be detected by chance in the EPIC field of view, and for which the PI has given prior accord for this information to be made public. Please feel free to follow-up on any of these sources.
LATEST ALERTS
31
aug
2025
Coordinates: |
13:58:09.7 -64:44:05.0 |
|---|---|
| Time: | 14:23:18 |
| Exposure time: | 18083 s |
| Position Error: | 0.50" |
| Flux: | 7.0e-14 ± 7.6e-15 erg cm2 s-1 |
| EPIC detection maximum likelihood: | 420.6 |
| Hardness ratio: | 0.58 |
| Long term variability: | 4451.3 |
| Simbad: | Unknown (V* BW Cir) |
| Spectral warning: | False |
| Alert type: | Low Flux State |
30
aug
2025
Coordinates: |
05:03:37.8 -69:24:10.0 |
|---|---|
| Time: | 06:03:46 |
| Exposure time: | 40895 s |
| Position Error: | 0.01" |
| Flux: | 4.4e-11 ± 2.7e-14 erg cm2 s-1 |
| EPIC detection maximum likelihood: | 5160213.5 |
| Hardness ratio: | -1.00 |
| Long term variability: | 34.3 |
| Simbad: | Unknown (2MASS J05033739-6924111) |
| Spectral warning: | True |
| Alert type: | First Detection |
29
aug
2025
Coordinates: |
15:55:38.6 +11:20:35.5 |
|---|---|
| Time: | 14:12:09 |
| Exposure time: | 25154 s |
| Position Error: | 0.83" |
| Flux: | 1.9e-13 ± 3.9e-14 erg cm2 s-1 |
| EPIC detection maximum likelihood: | 227.9 |
| Hardness ratio: | 0.53 |
| Long term variability: | 7.9 |
| Simbad: | Galaxy (SDSS J155538.56+112034.4) |
| Spectral warning: | True |
| Alert type: | Past Variability |
29
aug
2025
Coordinates: |
15:55:38.4 +11:21:40.2 |
|---|---|
| Time: | 14:12:09 |
| Exposure time: | 25154 s |
| Position Error: | 0.92" |
| Flux: | 1.6e-13 ± 4.0e-14 erg cm2 s-1 |
| EPIC detection maximum likelihood: | 149.1 |
| Hardness ratio: | 0.54 |
| Long term variability: | 10.1 |
| Simbad: | Unknown (SDSS J155538.46+112139.5) |
| Spectral warning: | True |
| Alert type: | High Flux State |
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