2007CBET.1057....1B -
Central Bureau Electronic Telegrams, 1057, 1 (2007/September-0)
Supernovae 2007hw-2007ie.
BASSETT B., BECKER A., BREWINGTON H., CHOI C., CINABRO D., D'ANDREA C., DEMBICKY J., DEPOY D.L., DILDAY B., DOI M., EASTMAN J., FRIEMAN J., GARNAVICH P., HARVANEK M., HOGAN C., HOLTZMAN J., IM M., JHA S., KONISHI K., KRZESINSKI J., LAMPEITL H., KESSLER R., KETZEBACK B., LONG D., MALANUSHENKO O., MARRINER J., McMILLAN R., MIKNAITIS G., MOROKUMA T., MOSHER J., NICHOL R., PAN K., PRIETO J.L., RICHMOND M., RIESS A., ROMANI R., SAKO M., SCHNEIDER D., SMITH M., SNEDDEN S., TAKANASHI N., TOKITA K., VAN DER HEYDEN K., WATTERS S., YASUDA N., WHEELER C., ZHENG C. and ATLEE D.
Abstract (from CDS):
Further to CBETs 611 and 786, B. Bassett, South African Astronomical Observatory; A. Becker, University of Washington (UW); H. Brewington, Apache Point Observatory (APO); C. Choi, Seoul National University (SNU); D. Cinabro, Wayne State University; C. D'Andrea, University of Pennsylvania (Penn); J. Dembicky, APO; D. L. DePoy, Ohio State University (OSU); B. Dilday, University of Chicago (UC); M. Doi, University of Tokyo (UT); J. Eastman, OSU; J. Frieman, Fermilab and UC; P. Garnavich, University of Notre Dame; M. Harvanek, APO; C. Hogan, UW; J. Holtzman, New Mexico State University; M. Im, SNU; S. Jha, Rutgers University; K. Konishi, UT; J. Krzesinski, APO; H. Lampeitl, University of Portsmouth (UP); R. Kessler, UC; B. Ketzeback, D. Long, O. Malanushenko, and V. Malanushenko, APO; J. Marriner, Fermilab; R. McMillan, APO; G. Miknaitis, Fermilab; T. Morokuma, National Astronomical Observatory of Japan; J. Mosher, Penn; R. Nichol, UP; K. Pan, APO; J. L. Prieto, OSU; M. Richmond, Rochester Institute of Technology; A. Riess, Space Telescope Science Institute; R. Romani, Stanford University (SU); M. Sako, Penn; D. Schneider, Pennsylvania State University; M. Smith, UP; S. Snedden, APO; N. Takanashi and K. Tokita, UT; K. van der Heyden, University of Cape Town; S. Watters, APO; N. Yasuda, UT; C. Wheeler, University of Texas; and C. Zheng, SU, on behalf of the Sloan Digital Sky Survey (SDSS) II collaboration, report the discovery of nine supernovae on g, r, and i images taken with the SDSS 2.5-m telescope at APO by the SDSS observing team. D. Atlee, J. Eastman, and J. Prieto (OSU) report that spectroscopy obtained with the Hiltner 2.4-m telescope at MDM Observatory on the nights of Sept. 8 and 9 shows six of the new objects to be type-Ia supernovae, one to be a probable type-Ia supernova, and two to be type-II supernovae. The discovery magnitudes tabulated below are all g magnitudes. Spectroscopic redshifts are given in the column labelled z. Peak dates are approximate estimates from the spectra, with a typical uncertainty of ± 2 to 3 days. SN Discov. R.A. (2000.0) Decl. Mag. z Estimated Type Date UT Peak Date 2007hw Sept. 3 2 03 35.16 + 0 47 10.3 20.4 0.08 Sept. 6 II 2007hx Sept. 3 2 06 27.08 - 0 53 58.3 19.5 0.08 Sept. 8 Ia 2007hy Sept. 3 3 39 42.33 + 1 05 32.2 20.9 0.19 Sept. 3 Ia 2007hz Sept. 3 21 03 08.95 - 1 01 45.1 19.7 0.14 Sept. 8 Ia 2007ia Sept. 4 3 43 10.06 + 0 06 08.9 20.0 0.13 Sept. 5 Ia 2007ib Sept. 4 23 15 44.56 + 0 27 25.6 20.4 0.03 Sep. 11 II 2007ic Sept. 5 0 05 57.98 + 1 06 11.1 20.0 0.14 Aug. 29 Ia 2007id Sept. 5 21 46 00.49 - 1 13 03.9 20.2 0.16 Aug. 29 Ia 2007ie Sept. 5 22 17 36.69 + 0 36 48.0 20.1 0.10 Aug. 27 Ia?
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