Report on the Mexican ArrayRadio Telescope (MEXART)
Americo Gonzalez-Esparza (1); Esmeralda Romero-Hernandez (1); Ernesto AguilarRodriguez (1); Julio Mejia-Ambriz (2); Veronica Ontiveros (3); Pablo VillanuevaHernandez (1);(1) MEXART, Unidad Michoacan, Instituto de Geofisica, UNAM; (2) Center for
Astrophysics and Space Sciences, University of California, San Diego; (3) Escuela
Nacional de Estudios Superiores, Morelia, UNAMMEXART work team• Americo Gonzalez-Esparza• Ernesto Aguilar-Rodriguez
PhD students• Esmeralda Romero• Oyuki ChangEngineers• Ernesto Andrade• Pablo Villanueva• Armando Carrillo

Collaborators
Verónica Ontiveros
Mario Rodriguez
Julio Mejia-Ambriz
Pablo Sierra
Samuel Vazquez

Mexican Array Radio Telescope (MEXART)
360 Km fom Mexico City, 20º North y 101º West, 2,000 m ASL,
29º geomagnetic latitude
80°0'0"W

60°0'0"W

40°0'0"W

20°0'0"W

0°0'0"

20°0'0"E

40°0'0"E

60°0'0"E

80°0'0"E

100°0'0"E

120°0'0"E

140°0'0"E

160°0'0"E

80°0'0"W

60°0'0"W

40°0'0"W

20°0'0"W

0°0'0"

20°0'0"E

40°0'0"E

60°0'0"E

80°0'0"E

100°0'0"E

120°0'0"E

140°0'0"E

160°0'0"E

50°0'0"N

50°0'0"N

30°0'0"S
70°0'0"S

-110

-104

-98

-92

-98

-92

28

-116

90°0'0"160°0'0"W 140°0'0"W 120°0'0"W 100°0'0"W

28

90°0'0"

MO
R

ELI
A

ZAC
A

PU

70°0'0"S!(MEXART

50°0'0"S

50°0'0"S

30°0'0"S

10°0'0"S

10°0'0"N

MEXART

10°0'0"SHUANIQUEO

30°0'0"N

30°0'0"N
10°0'0"NJIMENEZ

90°0'0"70°0'0"N

160°0'0"W 140°0'0"W 120°0'0"W 100°0'0"W

70°0'0"N

180°0'0"#22

MEXART

22

QUIROGAMEXARTERONGARICUARO

1616

#-116

-110

-104

Mapa de ubicación Geográfica del MEXART.

operation frequency 139.6 MHzbandwidth
2.0 MHz
no. dipoles
64x64=4096
collecting area
9600 m2

infraestructura en el sitio

! During 2009-2012 we performed IPS

observations using 1/4 and 1/2 of the antenna.
! In order to improve the signal to noise ratio ofour observations we decided to change thefirst amplification step (256 units).
! We will finish 2013 observing with 1/2 antenna
and the new amplifiers (128 units)! In 2014 we will have a new receiver (8channels, wider bandwidth (6 MHz), betteramplification) and will employ the full antenna
with the new set of amplifiers (256 units) andphase shifters

3C48 observations by MEXART in May-2013

Wavelet Analysis and Speed Fitting
10-1

MEXART 2013/05/28 3C048

101

100-8ln(Power) [V2]100

Frequency [Hz]Period [s]0-15-22-30

10-1
10-2

3.5

10-3

3.4
3.3

Average m290%

confidence level

Power [V2/Hz]

Signal Intensity

10110-410-5
10-610-4

13:35:50

10-7
10-1
13:36:40
13:37:30
13:38:20
Universal Time [hh:mm:ss]

100
Frequency [Hz]101

2013-02-18
LASCO C2

08:36:00 p.m.

transit time to 3C48
CME speed
CME angular position

138.2 hrs (~5 days 18 hrs)ICME
270 km/s (+-30 km/s)
41

3C48

Sun

MEXART

STEL

STEL raw data kindly provided
by M.Tokumaru

summary! In 2013 we changed 128 amplifiers (1/2 antenna). In

2014 we will observe with the full antenna with newamplifiers (256 units) and phase shifters. A newreceiver.
! We present preliminar identifications of ICMEs using
MEXART data and IPS theory. The first results show agood agreement with STELAB IPS observations.
! We developed a new methodology to analyze IPS data
applying wavelet analysis.
! On the basis on this methodology, the MEXART will
provide daily solar wind speeds and m indexes to study
space weather events.