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|
|Gaia16aye||5 Aug 2016, 00:53||295.00474||30.13149||14.27||ULENS||1.2 mag rise in red star near Galactic Plane||
Gaia16aye is our favourite confirmed binary microlensing event. And it's still not over - so please continue observing while it declines back to 'normal'
|Gaia16aza||6 Aug 2016, 19:25||245.35763||-26.77503||14.98||unknown||bright blue hostless transient||
Our best guess is that this is a new Cataclsymic Variable. It's quite bright at 15th magnitude, and we request monitoring in blue and red filters (e.g. g and r). A spectrum would be great so we can try to understand if it's really a CV, or something even more exotic.
|Gaia16bef||30 Aug 2016, 23:09||203.66082||-23.68151||15.21||SN Ia||confirmed SN Ia, found by ASAS: SN 2016eiy||
This is a bright Type Ia supernovae in a nearby galaxy! See if you can get some imaging of it - try ugri imaging every two nights, it's currently mag~16
|Gaia16bgk||11 Sep 2016, 16:21||310.16636||-54.31064||14.15||SN Ia||candidate SN in NGC 6942 GS-TEC predicts SN Ia||
This is a nice nearby Type Ia SN, and it's bright too - mag~14.5. You should be able to spot this with a small telescope and a CCD camera.
|Gaia16bic||17 Sep 2016, 07:31||122.55712||33.95713||18.00||SN II||candidate SN in grand design spiral galaxy NGC 2532||
We don't know what type of SN this is yet, but it should be visible at mag~18 at the very end of the night.
|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