J/ApJ/721/412 Photometry of polar CV* 1RXS J173006.4+033813 (Bhalerao+, 2010)
The polar cataclysmic variable 1RXS J173006.4+033813.
Bhalerao V.B., van Kerkwijk M.H., Harrison F.A., Kasliwal M.M.,
Kulkarni S.R., Rana V.R.
<Astrophys. J., 721, 412-423 (2010)>
=2010ApJ...721..412B 2010ApJ...721..412B
ADC_Keywords: Binaries, cataclysmic ; Photometry, ugriz ; Radial velocities ;
Stars, variable ; Stars, M-type ; X-ray sources
Keywords: binaries: close - binaries: spectroscopic -
novae, cataclysmic variables - stars: variables: general
stars: individual (1RXS J173006.4+033813)
Abstract:
We report the discovery of 1RXS J173006.4+033813, a polar cataclysmic
variable with a period of 120.21 minutes. The white dwarf primary has
a magnetic field of B=42+6-5MG and the secondary is an M3 dwarf.
The system shows highly symmetric double-peaked photometric modulation
in the active state as well as in quiescence. These arise from a
combination of cyclotron beaming and ellipsoidal modulation. The
projected orbital velocity of the secondary is K2=390±4km/s. We
place an upper limit of 830±65pc on the distance.
Description:
We observed 1RXS J173006.4+033813 with the Palomar Robotic 60 inch
telescope (P60) from UT 2009 April 17 to UT 2009 June 5 and with the
Large Format Camera (LFC) at the 5m Hale telescope at Palomar on UT
2009 August 26. In table 1, we give details of the photometry.
We obtained optical and near-infrared spectra of 1RXS J1730+03 at
various stages after outburst (Figure 5). The first optical spectra
were taken 13 days after the first photometric epoch. We used the Low
Resolution Imaging Spectrograph on the 10m Keck-I telescope (LRIS). We
acquired more optical data 34 days after outburst, with the Double
Beam Spectrograph on the 5m Hale telescope at Palomar (DBSP).
Objects:
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RA (2000) DE Designation(s)
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17 30 06.45 +03 38 20.0 1RXS J173006.4+033813 = USNO-B1.0 0936-00303814
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 49 1840 Photometry of 1RXS J173006.4+033813
table2.dat 68 21 Photometry of reference stars for
1RXS J173006.4+033813
table5.dat 34 20 Radial velocity of the M dwarf
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See also:
B/cb : Cataclysmic Binaries, LMXBs, and related objects (Ritter+, 2012)
J/ApJ/714/1424 : Isolated neutron stars from Rosat and Swift (Turner+, 2010)
J/ApJS/184/138 : XID II: RASS-2MASS cross-association (Haakonsen+, 2009)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 10 A10 "YYYY/MM/DD" Date UT date of the observation
12- 25 F14.6 d HJD Heliocentric Julian Date of observation start
27- 31 A5 --- Filt SDSS filter Filter name (1)
33- 35 I3 s Exp Exposure time
37- 42 F6.2 mag mag [-0.22/103.31] Observed magnitude in Filt
44- 49 F6.2 mag e_mag [0.03/148.8] Relative photometric error in
mag (G1)
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Note (1): Filters g', r' and i' denote data acquired at P60 in the respective
filters, lfci' denotes data acquired in the i' band with the Large
Format Camera at the Palomar 200" Hale telescope.
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 5 A5 --- ID Identifier (1)
7- 8 I2 h RAh Hour of Right Ascension (J2000)
10- 11 I2 min RAm Minute of Right Ascension (J2000)
13- 17 F5.2 s RAs Second of Right Ascension (J2000)
19 A1 --- DE- Sign of Declination (J2000)
20- 21 I2 deg DEd Degree of Declination (J2000)
23- 24 I2 arcmin DEm Arcminute of Declination (J2000)
26- 29 F4.1 arcsec DEs Arcsecond of Declination (J2000)
31- 36 F6.3 mag gmag ? The g' band magnitude
38- 42 F5.3 mag e_gmag ? Relative photometry error in gmag (G1)
44- 49 F6.3 mag rmag ? The r' band magnitude
51- 55 F5.3 mag e_rmag ? Relative photometry error in rmag (G1)
57- 62 F6.3 mag imag The i' band magnitude
64- 68 F5.3 mag e_imag Relative photometry error in imag (G1)
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Note (1): The letters A-I denote stars used in photometry of P60 data, numbers
1-15 denote reference stars used in photometry of LFC images
(Figure 1, Section 2.1).
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 13 F13.5 d HJD Heliocentric Julian Date
15- 18 I4 s Exp Exposure time
20- 23 I4 km/s RV Barycentric radial velocity
25- 27 I3 km/s e_RV RV uncertainty
29- 32 A4 --- Inst Instrument
34 A1 --- n_Inst [abc] instrument characteristics (1)
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Note (1): Flag as follows:
a = LRIS, with upgraded blue camera. Settings-Blue side: 3200-5760Å, grism
with 400 grooves/mm, blaze 3400Å, dispersion 1.09Å/pixel, and
R∼700. Red side: 5450-9250 Å, grating with 400 grooves/mm,
blaze 8500Å, dispersion 1.16Å/pixel, and R∼1600. Dichroic:
5600Å, slit: 1.0".
b = Double Spectrograph on the 5m Hale telescope at Palomar. Settings-Blue
side: 3270-5700Å, grating with 600 lines/mm, blaze 4000Å,
dispersion 1.08Å/pixel, and R∼1300. Red side: 5300-10200Å, grating
with 158 grooves/mm, blaze 7500Å, dispersion 4.9Å/pixel, and R∼600.
Dichroic: D55 (5500Å), slit: 1.5".
c = LRIS, with upgraded blue and red cameras;
http://www2.keck.hawaii.edu/inst/lris/lris-red-upgrade-notes.html.
Settings-Blue side: 3300-5700Å, grism with 400 grooves/mm, blaze
3400Å, dispersion 1.09Å/pixel, and R∼700. Red side: 6760-8800Å,
grating with 831 grooves/mm, blaze 8200Å, dispersion 0.58Å/pixel,
and R∼1800. Dichroic: 5600Å, slit: 1.0".
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Global notes:
Note (G1): Values do not include an absolute photometry uncertainty of 0.16mag
in the g' band, 0.14mag in the r' band and 0.06mag in the i' band.
Absolute photometry is derived from default P60 zero point
calibrations.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 06-Jul-2012