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The Optical Counterpart of SWIFT J195456.7+261301

ATEL # 1119; F.M. Walter (Stony Brook), H.E. Bond (STScI)
on 23 Jun 2007; 3:12 UT
Password Certification: Fred Walter (

Subjects: Optical, Transients, Stars

F.M. Walter (Stony Brook University) and H.E. Bond (STScI) obtained an low dispersion (R=2000) blue (3700-5300A) spectrum of the star 2.2" from the position of SWIFT J195456.7+261301 (ATEL #1103) at 2007 21 June 0630 UT. The spectrum was obtained with the SMARTS 1.5m RC spectrograph at Cerro Tololo. Conditions were thin clouds; the spectrum is noisy. The spectral type is about K0; the chromospheric Ca II H & K lines show prominent emission reversals. This could be an RS CVn-like system, consistent with Kennea et al.'s conjecture (ATEL #1103) that this is a flaring coronal star.

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R. E. Rutledge , Editor
ATEL Mirror v1.0 Updates