Amalgame: Cosmological Constraints from the First Combined Photometric Supernova Sample

Understand

Future constraints of cosmological parameters from Type Ia supernovae (SNe Ia) will depend on the use of photometric samples, those samples without spectroscopic measurements of the SNe Ia.

• There is a growing number of analyses that show that photometric samples can be utilised for precision cosmological studies with minimal systematic uncertainties.
• To investigate this claim, we perform the first analysis that combines two separate photometric samples, SDSS and Pan-STARRS, without including a low-redshift anchor.
• We evaluate the consistency of the cosmological parameters from these two samples and find they are consistent with each other to under $1\sigma$.