PSRB1749-28 -POS 2013

Poruri SaiRahul

PSR B1749-28 - Observations & PropertiesExperiment during POS - 2013

Poruri Sai Rahul

Department of PhysicsIIT Madras

PSRB1749-28 -POS 2013

Poruri SaiRahul

Pulsar Properties

Some properties of the pulsar, from ATNF Pulsar Catalogue1

and VizieR are2

• Strength S400 = 1.1Jy

• Dispersion Measure - DM = 50.88000kpc/cm3

• Highly Polarized Flux

• Barycentric period of PulsarP = 562.5578578340000ms

• Profile Width at 50% of peakW 50 = 9.1ms

1http://goo.gl/Xuo4c2http://goo.gl/maeGC

PSRB1749-28 -POS 2013

Poruri SaiRahul

Pulsar Properties

Some properties of the pulsar, from ATNF Pulsar Catalogue1

and VizieR are2

• Strength S400 = 1.1Jy

• Dispersion Measure - DM = 50.88000kpc/cm3

• Highly Polarized Flux

• Barycentric period of PulsarP = 562.5578578340000ms

• Profile Width at 50% of peakW 50 = 9.1ms

1http://goo.gl/Xuo4c2http://goo.gl/maeGC

PSRB1749-28 -POS 2013

Poruri SaiRahul

Pulsar Spectrum

The spectrum of a pulsar can be modelled using a power lawspectrum -

fν = να

where the average spectral index is −1.6 ± 0.3 3

3arXiv:1302.2053

PSRB1749-28 -POS 2013

Poruri SaiRahul

Pulsar Spectrum

The spectrum of a pulsar can be modelled using a power lawspectrum -

fν = να

where the average spectral index is −1.6 ± 0.3 3

3arXiv:1302.2053

PSRB1749-28 -POS 2013

Poruri SaiRahul

Pulsar Spectrum

the strength of the pulsar is known at 3 different frequencies -

• S400 = 1100.00 mJy

• S600 = 335.00 mJy

• S1400 = 36.00 mJy

from these values, the spectral index of PSR B1749-28 isestimated to be −2.676 and by extrapolating this, we estimatethat

• S326.5 = 1894 mJy

PSRB1749-28 -POS 2013

Poruri SaiRahul

Pulsar Spectrum

the strength of the pulsar is known at 3 different frequencies -

• S400 = 1100.00 mJy

• S600 = 335.00 mJy

• S1400 = 36.00 mJy

from these values, the spectral index of PSR B1749-28 isestimated to be −2.676 and by extrapolating this, we estimatethat

• S326.5 = 1894 mJy

PSRB1749-28 -POS 2013

Poruri SaiRahul

Pulsar Spectrum

the strength of the pulsar is known at 3 different frequencies -

• S400 = 1100.00 mJy

• S600 = 335.00 mJy

• S1400 = 36.00 mJy

from these values, the spectral index of PSR B1749-28 isestimated to be −2.676 and by extrapolating this, we estimatethat

• S326.5 = 1894 mJy

PSRB1749-28 -POS 2013

Poruri SaiRahul

Calibrator - 2053-201

The Calibrator - 2053-201 is a galaxy at a redshift of 0.1566224

The strength of the calibrator is known at 6 differentfrequencies5 -

• S80 = 16Jy

• S408 = 6.2Jy

• S1410 = 2.6Jy

• S2700 = 1.6Jy

• S5000 = 0.99Jy

• S8400 = 0.6Jy

from these values, we estimate that

• S326.5 = 7.058Jy

4http://goo.gl/l3qoR5http://goo.gl/1d6OZ

PSRB1749-28 -POS 2013

Poruri SaiRahul

Calibrator - 2053-201

The Calibrator - 2053-201 is a galaxy at a redshift of 0.1566224

The strength of the calibrator is known at 6 differentfrequencies5 -

• S80 = 16Jy

• S408 = 6.2Jy

• S1410 = 2.6Jy

• S2700 = 1.6Jy

• S5000 = 0.99Jy

• S8400 = 0.6Jy

from these values, we estimate that

• S326.5 = 7.058Jy

4http://goo.gl/l3qoR5http://goo.gl/1d6OZ

PSRB1749-28 -POS 2013

Poruri SaiRahul

Calibrator - 2053-201

The Calibrator - 2053-201 is a galaxy at a redshift of 0.1566224

The strength of the calibrator is known at 6 differentfrequencies5 -

• S80 = 16Jy

• S408 = 6.2Jy

• S1410 = 2.6Jy

• S2700 = 1.6Jy

• S5000 = 0.99Jy

• S8400 = 0.6Jy

from these values, we estimate that

• S326.5 = 7.058Jy

4http://goo.gl/l3qoR5http://goo.gl/1d6OZ

PSRB1749-28 -POS 2013

Poruri SaiRahul

Observations

• Observations of the pulsar took place on Jul 13 from23:28:27 to 23:49:59 IST for a total of 1200s.

• The calibrator source for this specific pulsar is 2053-201,observed for 300s.

• the off source RA is 20 minutes east from the calibratorand was observed for 300s.

PSRB1749-28 -POS 2013

Poruri SaiRahul

Observations

• Observations of the pulsar took place on Jul 13 from23:28:27 to 23:49:59 IST for a total of 1200s.

• The calibrator source for this specific pulsar is 2053-201,observed for 300s.

• the off source RA is 20 minutes east from the calibratorand was observed for 300s.

PSRB1749-28 -POS 2013

Poruri SaiRahul

Observations

• Observations of the pulsar took place on Jul 13 from23:28:27 to 23:49:59 IST for a total of 1200s.

• The calibrator source for this specific pulsar is 2053-201,observed for 300s.

• the off source RA is 20 minutes east from the calibratorand was observed for 300s.

PSRB1749-28 -POS 2013

Poruri SaiRahul

Data Analysis Pipeline

PSRB1749-28 -POS 2013

Poruri SaiRahul

Data Analysis Pipeline

The pulsar’s properties studied are

• Dispersion Measure

• Period of Pulsar

• Flux Density

in that particular order.

PSRB1749-28 -POS 2013

Poruri SaiRahul

Data Analysis Pipeline

The pulsar’s properties studied are

• Dispersion Measure

• Period of Pulsar

• Flux Density

in that particular order.

PSRB1749-28 -POS 2013

Poruri SaiRahul

Data Analysis Pipeline

The pulsar’s properties studied are

• Dispersion Measure

• Period of Pulsar

• Flux Density

in that particular order.

PSRB1749-28 -POS 2013

Poruri SaiRahul

Results

The pulsar’s properties have been determined to be

• Dispersion Measure - 50.733 ± 1.764pc/cm3 against theactual value of 50.88pc/cm3

• Period of Pulsar - 562.587ms against the actual value of562.55785783400ms

• Distance - 1.2683 ± 0.0441kpc against the actual value of1.53kpc - estimated from the DM and an average galacticelectron density n(e)6 of 4 × 10−2cm−3

• Flux Density - 1827.7 ± 59.8mJy against an estimatedvalue of 1894mJy

6http://adsabs.harvard.edu/abs/1969ApJ...157.1137J

PSRB1749-28 -POS 2013

Poruri SaiRahul

Results

The pulsar’s properties have been determined to be

• Dispersion Measure - 50.733 ± 1.764pc/cm3 against theactual value of 50.88pc/cm3

• Period of Pulsar - 562.587ms against the actual value of562.55785783400ms

• Distance - 1.2683 ± 0.0441kpc against the actual value of1.53kpc - estimated from the DM and an average galacticelectron density n(e)6 of 4 × 10−2cm−3

• Flux Density - 1827.7 ± 59.8mJy against an estimatedvalue of 1894mJy

6http://adsabs.harvard.edu/abs/1969ApJ...157.1137J

PSRB1749-28 -POS 2013

Poruri SaiRahul

Results

The pulsar’s properties have been determined to be

• Dispersion Measure - 50.733 ± 1.764pc/cm3 against theactual value of 50.88pc/cm3

• Period of Pulsar - 562.587ms against the actual value of562.55785783400ms

• Distance - 1.2683 ± 0.0441kpc against the actual value of1.53kpc - estimated from the DM and an average galacticelectron density n(e)6 of 4 × 10−2cm−3

• Flux Density - 1827.7 ± 59.8mJy against an estimatedvalue of 1894mJy

6http://adsabs.harvard.edu/abs/1969ApJ...157.1137J

PSRB1749-28 -POS 2013

Poruri SaiRahul

Results

The pulsar’s properties have been determined to be

• Dispersion Measure - 50.733 ± 1.764pc/cm3 against theactual value of 50.88pc/cm3

• Period of Pulsar - 562.587ms against the actual value of562.55785783400ms

• Distance - 1.2683 ± 0.0441kpc against the actual value of1.53kpc - estimated from the DM and an average galacticelectron density n(e)6 of 4 × 10−2cm−3

• Flux Density - 1827.7 ± 59.8mJy against an estimatedvalue of 1894mJy

6http://adsabs.harvard.edu/abs/1969ApJ...157.1137J

PSRB1749-28 -POS 2013

Poruri SaiRahul

Results

The pulsar’s properties have been determined to be

• Dispersion Measure - 50.733 ± 1.764pc/cm3 against theactual value of 50.88pc/cm3

• Period of Pulsar - 562.587ms against the actual value of562.55785783400ms

• Distance - 1.2683 ± 0.0441kpc against the actual value of1.53kpc - estimated from the DM and an average galacticelectron density n(e)6 of 4 × 10−2cm−3

• Flux Density - 1827.7 ± 59.8mJy against an estimatedvalue of 1894mJy

6http://adsabs.harvard.edu/abs/1969ApJ...157.1137J

PSRB1749-28 -POS 2013

Poruri SaiRahul

Band response - Offsource

PSRB1749-28 -POS 2013

Poruri SaiRahul

Band response - Calibrator

PSRB1749-28 -POS 2013

Poruri SaiRahul

Band response - Offsource

PSRB1749-28 -POS 2013

Poruri SaiRahul

Band response - Calibrator

PSRB1749-28 -POS 2013

Poruri SaiRahul

Resources

Information regarding the pulsar and the calibrator wereobtained from the following sources -

• Australia Telescope National Facility- ATNF Pulsar Catalogue7,

• NASA/IPAC Extra Galactic Database - NED8,

• SIMBAD9,

• VizieR10.

7http://goo.gl/Xuo4c8http://goo.gl/CAjoH9http://goo.gl/jw2Sg

10http://goo.gl/maeGC

PSRB1749-28 -POS 2013

Poruri SaiRahul

Resources

Information regarding the pulsar and the calibrator wereobtained from the following sources -

• Australia Telescope National Facility- ATNF Pulsar Catalogue7,

• NASA/IPAC Extra Galactic Database - NED8,

• SIMBAD9,

• VizieR10.

7http://goo.gl/Xuo4c8http://goo.gl/CAjoH9http://goo.gl/jw2Sg

10http://goo.gl/maeGC