From Gaia Science Alerts Working Group
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Please expand this section with your favourite types of possible alerts. The most useful information would be the number statistics, amplitude and timescale, example light curve, spectrum and the reasoning for an rapid alert.

Possible triggers for Science Alerts

Table of transients

This table is based on Rau et al. 2009 on Palomar Transient Factory (PTF). MR is an absolute magnitude in R, tau is time of a decline by 2 mag.

Class MR tau Universal rate Gaia rate
Dwarf Novae 9..4 3..20 <math>3\times10^{-5} \textrm{pc}^{-3} \textrm{yr}^{-1}</math>
Classical Novae -5..-10 2..100 <math>2\times10^{-10} \textrm{yr}^{-1}\textrm{L}_{\odot,K}^{-1}</math>
Luminous Red Novae -10..-14 20..60 <math>1.5\times10^{-13} \textrm{yr}^{-1}\textrm{L}_{\odot,K}^{-1}</math>
Fallback SNe -4..-21 0.5..2 <math>10^{-13} \textrm{yr}^{-1}\textrm{L}_{\odot,K}^{-1}</math>
Macronovae -13..-15 0.3..3 <math>10^{-4..-8} \textrm{Mpc}^{-3} \textrm{yr}^{-1}</math>
SN .Ia -15..-17 2..5 <math>(4..10)\times 10^{-6} \textrm{Mpc}^{-3} \textrm{yr}^{-1}</math>
SNe Ia -17..-19.5 30..70 <math>3\times 10^{-5} \textrm{Mpc}^{-3} \textrm{yr}^{-1}</math>
Tidal disruption flares -15..-19 30..350 <math>10^{-6} \textrm{Mpc}^{-3} \textrm{yr}^{-1}</math>
Core-collapse SNe -14..-21 20..300 <math>5\times 10^{-5} \textrm{Mpc}^{-3} \textrm{yr}^{-1}</math>
Luminous SNe -19..-23 50..400 <math>10^{-7} \textrm{Mpc}^{-3} \textrm{yr}^{-1}</math>
Orphan afterglows (SGRB) -14..-18 5..15 <math>3\times 10^{-7..-9} \textrm{Mpc}^{-3} \textrm{yr}^{-1}</math>
Orphan afterglows (LGRB) -22..-26 2..15 <math>3\times 10^{-7..-9} \textrm{Mpc}^{-3} \textrm{yr}^{-1}</math>
On-axis LGRB afterglows ..-37 1..15 <math>4\times 10^{-10} \textrm{Mpc}^{-3} \textrm{yr}^{-1}</math>