ar X iv : a st ro - p h / 03 11 16 6 v 1 6 N ov 2 00 3 The intrinsic intensity modulation of PSR B 1937 + 21 at 1410 MHz

N ov 2 00 3 The intrinsic intensity modulation of PSR B 1937 + 21 at 1410 MHz

The single-pulse properties of the millisecond radio pulsar PSR B1937+21 are studied in the 1410 MHz radio band. Aside from occasional “giant pulses” occurring in restricted regions of pulse phase, the emission appears to be remarkably stable, showing no pulse-to-pulse fluctuations other then those induced by propagation through the interstellar medium. This type of behavior has not been seen i...

ar X iv : a st ro - p h / 01 11 13 6 v 1 7 N ov 2 00 1 1 Active Optics in Modern , Large Optical Telescopes

ar X iv : a st ro - p h / 03 11 60 3 v 1 2 7 N ov 2 00 3 A search for emission line galaxies at z = 6 . 5

We are carrying out a search for Lyα emitting galaxies at z = 6.5 employing slitless spectroscopy at the VLT. In our 43 arcmin field we find three isolated single emission lines with SEDs consistent with line emitting galaxies at z = 6.5.

ar X iv : a st ro - p h / 03 05 01 3 v 1 1 M ay 2 00 3 The issue of aliasing in PSR B 0943 + 10 II Signal processing arguments

Deshpande & Rankin (1999, 2001) claim that the frequency of the very narrow feature, in the spectrum of radio flux variations of PSR B0943+10, is an alias of its actual value. They also claim to have detected an amplitude modulation on the above phase modulation. This paper argues that both these claims are unjustified.

ar X iv : a st ro - p h / 04 11 16 2 v 1 8 N ov 2 00 4 Chandra observations of the recurrent nova IM Nor

The recurrent nova IM Nor was observed twice in X-rays with Chandra ACISS, 1 and 6 months after the optical outburst. It was not detected in the first