The DECam Search for Intermediate Redshift Supernovae program(DESIRT) reports the early discovery of two infant candidate SNe AT2021iro and AT2021irn.
AT2021iro was first detected on DECam g-band images obtained on 2021-04-06 05:09 UT about 3 days after the last non-detection with a limiting magnitude of 23.5 in g band. The discovery magnitudes are 22.202 ,21.653, 21.205 in g, r, and z bands respectively. Assuming the redshift of the host (LEDA 1226591, z= 0.13717 from NED), this object was discovered about absolute magnitude Mg = -16.8.
AT2021irn was first detected on DECam g-band images obtained on 2021-04-06 05:56 UT about 3 days after the last non-detection with a limiting magnitude of 23.5 in g band. The discovery magnitudes are 21.693, 21.44, 20.99 in g, r, and z bands respectively. Assuming the redshift of the host (2MFGC 11748, z= 0.05684 from NED), this object was discovered about absolute magnitude Mg = -15.3 and is likely to rise to a magnitude of ~ 17.6 if it is a Type Ia SN.
Rapid follow-up observations are strongly encouraged for these two SN candidates.
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