AAVSO International Database

Alert Notice 344: 1138-57 V1605 Cen = Nova Centauri 2007

January 26, 2007

Event: Nova in Centaurus

Discovered By: William Liller, Vina del Mar, Chile

Discovery Date: on films taken near Jan. 23.354 UT

Discovery Magnitude: approximately 8.2, on two Technical Pan films taken with an 85-mm focal length camera lens and an orange filter

Position: R.A. = 11h 43.2m Decl. = -58o 03' (equinox 2000.0) from Liller.

Alert Notice 345: Request to monitor cataclysmic variables for radio observations

February 15, 2007: Dr. Christian Knigge, University of Southampton, England, has requested our assistance in monitoring ten (10) dwarf novae cataclysmic variables as part of a search for radio jet formation during outbursts. Dr. Knigge is attempting to observe a dwarf nova outburst within six hours of the outburst onset using the NRAO Very Large Array (VLA) telescope in New Mexico and the Jodrell Bank MERLIN telescope in the United Kingdom.

Alert Notice 346: 1651-32 V1280 Sco = Nova Scorpii 2007

February 16, 2007

Event: Very Bright Nova in Scorpius

This nova, discovered at 9th magnitude 12 days ago, has brightened dramatically in the past few days to 3rd magnitude, becoming one of the brightest novae in the past several years. It has gained the attention of the professional community and will be observed by numerous satellites, including Chandra, Swift, and INTEGRAL.

Alert Notice 347: 1650-35 V1281 Sco = Nova Scorpii 2007 No. 2

February 22, 2007

Event: Nova in Scorpius

Discovered Independently by:
- Yuji Nakamura, Kameyama, Mie, Japan, (via H. Yamaoka, Kyushu University, IAU Circular No. 8810)
- Hideo Nishimura, Miyawaki, Kakegawa, Japan, (via S. Nakano, Sumoto, Japan, IAU Circular No. 8810)

Discovery Date:
- Nakamura: Feb. 19.8593 UT
- Nishimura: Feb. 20.8365 UT

Alert Notice 350: Exoplanet Transit Search For GJ 436

June 6, 2007

Object: 1137+27 GJ 436
    RA (2000)       DEC           V         B-V    V-Rc   Rc-Ic    V-Ic
11:42:11.58 +26:42:17.7  10.702  1.489  1.073  1.349  2.462

INTRODUCTION

Dr. Greg Laughlin (UC Santa Cruz/Lick Observatory & Transitsearch.org) has requested help in observing GJ 436 to look for transits of previously detected and undetected extrasolar planets.

Alert Notice 351: Campaign for a New Eclipsing Cepheid

June 8, 2007

Name:
TYC 1031 01262 1
ASAS 182611+1212.6
1821+12B (Harvard Designation)
ASAS182612 (AAVSO name)

Discovered by:
Pojmanski, G., Pilecki, B., Szczygiel, D. 2005, AcA 55, 275
and
Antipin, S.V., Sokolovsky, K. V. and Ignatieva, T. I. 2007, astro-ph/0705.0605

Position (from Sonoita Research Observatory, UCAC2):
18:26:11.50 +12:12:35.0 (+/- 100mas)