Observe - Alerts archive
Explanation of Alerts table
Alert ID: The name that was assigned to this Alert. Click on the link to see more information about the Alert.
Time: When Gaia first detected this Alert.
RA: The right ascension of the Alert (see Observing advice for more info).
Dec: The declination of the Alert.
Mag: The brightness of the Alert in Gaia magnitudes. For more information on magnitudes, see Observing advice. Note that a lower value for the magnitude means an Alert is brighter, and a higher value means it is fainter.
Classification: What sort of transient each Alert is.
Comment: Any additional information we have about why an alert is interesting, or information such as its distance.
Desired follow-up: Guidelines on what data we need from telescopes such as Faulkes for each Alert.
School: Initials of schools following-up this Alert (see Schools following-up Gaia Alerts).
| Alert ID | Time | RA | Dec | Magnitude | Classification | Comment | Desired follow-up |
School |
|---|---|---|---|---|---|---|---|---|
| Gaia18aen | 17 Jan 2018, 04:16 | 120.71694 | -30.31032 | 11.33 | unknown | bright emission line star in Galactic plane brightens by 1 magnitude |
This is bright and in reach of modest telescopes - BUT only really observable from the Southern Hemisphere. We've no idea what this is - please monitor |
ECS |
| Gaia18bdx | 5 May 2018, 07:06 | 166.06666 | 50.03066 | 18.75 | SN II | candidate SN in outskirts of galaxy UGC 6129, rising | ECS | |
| Gaia16agf | 27 Feb 2016, 06:41 | 98.53741 | -25.18462 | 17.03 | SN Ia | Candidate SN, GSTEC predicts young SN Ia at -16 days | ECS | |
| Gaia17bej | 7 May 2017, 14:30 | 274.25440 | -31.38352 | 14.60 | ULENS | source towards Galactic Bulge brightens by 3 mags, candidate microlensing event |
Candidate microlensing event... or is it? We don't know. Observe it to help us find out! |
|
| Gaia17bnk | 13 Jun 2017, 01:14 | 95.65247 | -38.56183 | 17.46 | CV | Candidate CV, 2mag rise in UV source GALEXASC J062236.61-383342.9, Gaia & CRTS have prior outbursts |
We think this is a cataclysmic variable and we want to measure its orbital period. Continuous monitoring for 2 - 3 hours in a single filter (e.g. g or r) will show how the brightness varies with time and from that we can work out the binary period.
|
|
| Gaia17bnl | 12 Jun 2017, 22:47 | 312.75374 | 44.53049 | 16.48 | YSO | 1 mag dip in YSO V1701 Cyg |
Young star in the North American Nebula. Appears to fade because of dust in the local environment. Continuous observations preferred in two filters, e.g. V and I |
|
| Gaia18aod | 8 Mar 2018, 09:11 | 208.36495 | -67.41694 | 6.77 | Nova | confirmed Galactic Nova, extremely bright, aka Nova Circini 2018 (PNV J13532700-6725110) |
An opportunity to observe a really bright Galactic Nova. |
|
| Gaia18asi | 24 Mar 2018, 01:36 | 275.09139 | 7.18534 | 12.00 | XRB | bright outburst in Gaia source, aka ASASSN-18ey, aka MAXI J1820+070, candidate X-ray binary |
This was discovered first in the optical (by ASAS-SN) then in X-rays, and then we saw it brighten in Gaia. It's very likely to be an X-ray binary with a black hole at the centre. Continued photometric monitoring of this new system is encouraged - especially in a blue filter |
|
| Gaia16aax | 26 Jan 2016, 15:55 | 218.57701 | 49.21014 | 18.33 | AGN | slowly rising transient in galaxy core |
The active galactic nucleus in the centre of this galaxy has started to fade again. It's now at magnitude ~19, so lets keep an eye on it: we need images in u, g, r and i filters about every two weeks. |
|
| Gaia16ada | 9 Feb 2016, 00:03 | 188.96784 | 27.93208 | 17.72 | SN imposter | transient near/in NGC4559C spatially coincident with candidate LBV with previous outbursts. |
A massive star seems to be undergoing a series of outbursts which we want to monitor. The outburst has faded, but lets keep an eye on it. We'll need a 300 second exposure with the LCOGT 1-m telescopes in the r filter, every month or so. CURRENTLY BEHIND THE SUN! |