Detecting the RRAT J1819–1458 with the VLA+Mark5
Observations
Were performed on Jun 15, 2007 with the VLA using the Mark5A baseband recorder in 512x8-2 mode. Two circular polarizations were two-bit sampled and recorded in 4 adjacent 16-MHz frequency channels at the central frequency of 1443.1 MHz- Project: AM888
- PI: Tim Hankins
- Target source: J1819–1458 [par]
- Observing setup [crd file]. Labels A,
B, ... H mark different frequency channels in both polarizations after decoding
Processing
- Disks listings: WVU09, WVU10, WVU12, WVU13
- Test pulsar: B0329+54. Examples of spectra, bit-statistics in 2.5 sec.
1-min folded profile in channel A is here. Apparent ripples seem to be due to noise-diode signal turned ON.
Folded profile on the same data with a noise-diode substituted by the random Gaussian noise.
Average profile in 48-MHz band for 2 polarizations: A and D. Channels F and H are on the very end of the RF band, and were not used
Average profiles in individual channels can be found here
Prepfold plots for individual channels - RRAT J1819–1458
- • scan11 [am888_y.11] - 700.7375 s [spectra] [bit-statistics] [TOAs] Done: One strong spike, but it's not clear by now if it is real, nothing else.
- • scan12 [am888_y.12] - 325.7725 s [spectra] [bit-statistics] [TOAs] Done: No obvious pulses.
- • scan13 [am888_y.13] - 170.8900 s [spectra] [bit-statistics] [TOAs] Done: Nothing...
- • scan14 [am888_y.14] - 72.6025 s [spectra] [bit-statistics] [TOAs] Done. This scan is only 70 s long, no obvious true pulses were found.
- • scan15 [am888_y.15] - 584.5225 s [spectra] [bit-statistics] [TOAs] Done. Nothing.
- • scan16 [am888_y.16] - 1916.2100 s [spectra] [bit-statistics] [TOAs] Done. Nothing obvious
- • scan17 [am888_y.17] - 1917.1775 s [spectra] [bit-statistics] [TOAs] Done. Nothing obvious
- • scan18 [am888_y.18] - 1919.2325 s [spectra] [bit-statistics] [TOAs] Done. Nothing obvious. Taking a closer look on all these scans because we are expecting at least one burst every 3-4 min, and it looks strange that no any obvious events so far...
- • scan15b [am888b.y.15] - 236.8875 s [spectra] [bit-statistics]
- • scan16b [am888b.y.16] - 1675.8775 s [spectra] [bit-statistics]
- • scan17b [am888b.y.17] - 1916.7450 s [spectra] [bit-statistics]
- • scan18b [am888b.y.18] - 1918.7675 s [spectra] [bit-statistics]
- • scan19 [am888.y.19] - 1916.7075 s [spectra] [bit-statistics]
- • scan20 [am888.y.20] - 1912.9900 s [spectra] [bit-statistics]
- • scan21 [am888.y.21] - 1916.2175 s [spectra] [bit-statistics]
- • scan22 [am888.y.22] - 1875.5200 s [spectra] [bit-statistics]
- • scan23 [am888.y.23] - 1916.1250 s [spectra] [bit-statistics]
- • scan24 [am888.y.24] - 1497.1225 s [spectra] [bit-statistics]
- • scan25 [am888.y.25] - 1495.8325 s [spectra] [bit-statistics]
- • scan26 [am888.y.26] - 55.9075 s - test pulsar B0329+54, see above
