Columns for target_info.txt ID Target id, one-up number roughly same as Merger Zoo presentation order SDSSID SDSS DR7 ID for target PRI_RA_DEG RA in degrees for primary galaxy PRI_DEC_DEG DEC in degrees for primary galaxy PRI_NAMES Alternate names for primary galaxy: SDSS, Arp, NGC/IC, UGC, 2MASS SEC_RA_DEG RA in degrees for secondary galaxy SEC_DEC_DEG DEC in degrees for secondary galaxy SEC_NAMES Alternate names for secondary galaxy: SDSS, Arp, NGC/IC, UGC, 2MASS Columns for target_sdss_dr7_dr8.txt For DR8 values, the ra/dec from DR7 was used with a call to the CAS database function dbo.fGetNearbyObjEq() using a radius of 0.75 arcmin. Target 54 was from DR8 originally, no corresponding values for DR7 found. For several DR7 targets no DR8 values were found. ID Target id, one-up number roughly same as Merger Zoo presentation order SDSSID SDSS DR7 ID for target PRI_DR7_ID SDSS DR7 id for primary galaxy PRI_DR8_ID SDSS DR8 id for primary galaxy SEC_DR7_ID SDSS DR7 id for secondary galaxy SEC_DR8_ID SDSS DR8 id for secondary galaxy PRI_DR7_U Dered U magnitude (model - extinction) from DR7 for primary PRI_DR7_G Dered G magnitude (model - extinction) from DR7 for primary PRI_DR7_R Dered R magnitude (model - extinction) from DR7 for primary PRI_DR7_I Dered I magnitude (model - extinction) from DR7 for primary PRI_DR7_Z Dered Z magnitude (model - extinction) from DR7 for primary PRI_DR7_SPECZ Spectral redshift from DR7 for primary PRI_DR7_PHOTOZ Photometric redshift from DR7 for primary PRI_DR7_PHOTOZ2 Alternate photometric redshift from DR7 for primary PRI_DR8_U Dered U magnitude (model - extinction) from DR8 for primary PRI_DR8_G Dered G magnitude (model - extinction) from DR8 for primary PRI_DR8_R Dered R magnitude (model - extinction) from DR8 for primary PRI_DR8_I Dered I magnitude (model - extinction) from DR8 for primary PRI_DR8_Z Dered Z magnitude (model - extinction) from DR8 for primary PRI_DR8_SPECZ Spectral redshift from DR8 for primary PRI_DR8_PHOTOZ Photometric redshift from DR8 for primary PRI_DR8_PHOTOZ2 Alternate photometric redshift from DR8 for primary SEC_DR7_U Dered U magnitude (model - extinction) from DR7 for secondary SEC_DR7_G Dered G magnitude (model - extinction) from DR7 for secondary SEC_DR7_R Dered R magnitude (model - extinction) from DR7 for secondary SEC_DR7_I Dered I magnitude (model - extinction) from DR7 for secondary SEC_DR7_Z Dered Z magnitude (model - extinction) from DR7 for secondary SEC_DR7_SPECZ Spectral redshift from DR7 for secondary SEC_DR7_PHOTOZ Photometric redshift from DR7 for secondary SEC_DR7_PHOTOZ2 Alternate photometric redshift from DR7 for secondary SEC_DR8_U Dered U magnitude (model - extinction) from DR8 for secondary SEC_DR8_G Dered G magnitude (model - extinction) from DR8 for secondary SEC_DR8_R Dered R magnitude (model - extinction) from DR8 for secondary SEC_DR8_I Dered I magnitude (model - extinction) from DR8 for secondary SEC_DR8_Z Dered Z magnitude (model - extinction) from DR8 for secondary SEC_DR8_SPECZ Spectral redshift from DR8 for secondary SEC_DR8_PHOTOZ Photometric redshift from DR8 for secondary SEC_DR8_PHOTOZ2 Alternate photometric redshift from DR8 for secondary