J/ApJ/927/216 r-band LC of the millisecond pulsar PSR J1555-2908 (Ray+, 2022)
Discovery, timing, and multiwavelength observations of the black widow
millisecond pulsar PSR J1555-2908.
Ray P.S., Nieder L., Clark C.J., Ransom S.M., Cromartie H.T., Frail D.A.,
Mooley K.P., Intema H., Jagannathan P., Demorest P., Stovall K.,
Halpern J.P., Deneva J., Guillot S., Kerr M., Swihart S.J., Bruel P.,
Stappers B.W., Lyne A., Mickaliger M., Camilo F., Ferrara E.C.,
Wolff M.T., Michelson P.F.
<Astrophys. J., 927, 216 (2022)>
=2022ApJ...927..216R 2022ApJ...927..216R
ADC_Keywords: Pulsars; Gamma rays; Radio sources; Photometry, RI
Keywords: Millisecond pulsars ; Gamma-ray sources ; Binary pulsars ;
Pulsars ; Compact binary stars ; Radio pulsars
Abstract:
We report the discovery of PSR J1555-2908, a 1.79ms radio and
gamma-ray pulsar in a 5.6hr binary system with a minimum companion
mass of 0.052M☉. This fast and energetic ({dot}E=3x1035erg/s)
millisecond pulsar was first detected as a gamma-ray point source in
Fermi Large Area Telescope (LAT) sky survey observations. Guided by a
steep-spectrum radio point source in the Fermi error region, we
performed a search at 820MHz with the Green Bank Telescope that first
discovered the pulsations. The initial radio pulse timing observations
provided enough information to seed a search for gamma-ray pulsations
in the LAT data, from which we derive a timing solution valid for the
full Fermi mission. In addition to the discovery and timing of radio
and gamma-ray pulsations, we searched for X-ray pulsations using NICER
but no significant pulsations were detected. We also obtained
time-series r-band photometry that indicates strong heating of the
companion star by the pulsar wind. Material blown off the heated
companion eclipses the 820MHz radio pulse during inferior conjunction
of the companion for ∼10% of the orbit, which is twice the angle
subtended by its Roche lobe in an edge-on system.
Description:
As part of a long-term effort to discover radio pulsars associated
with Fermi sources, organized by the Fermi PSC, we made targeted
observations of the candidates identified in
Frail+ (2018MNRAS.475..942F 2018MNRAS.475..942F). We observed P86Y3595 on 2017 February 1
(MJD 57785) for 30 minutes at 820MHz with the Robert C. Byrd Green
Bank Telescope (GBT). We used the GUPPI pulsar backend to record
200MHz of bandwidth with 2048 channels at 61.44µs resolution.
A GBT observation of 5 minutes at S-band (on MJD 57806) determined the
pulse width at that frequency to be a very narrow 3%.
We also obtained a 30 minute observation on MJD 57788 using the Karl
G. Jansky Very Large Array (VLA) in phased-array pulsar mode.
We also detected the pulsation in a GBT observation of 2 minutes at
350MHz that had been taken on MJD 56907 as part of the GBNCC survey
(Stovall+ 2014ApJ...791...67S 2014ApJ...791...67S). Lastly we obtained a GBT observation
of 5hr on MJD 57833.
We also obtained five observations of varying duration using the 76m
Lovell telescope between 2019 November 15 and 2020 September 21.
See Section 3.
We made a 122ks observation of PSR J1555-2908 with the NICER X-ray
telescope (NICER proposal #2527), with data accumulated from
2019-May-26 (ObsID 2527010101) through 2019-Sept-9 (ObsID 2527010142).
See Section 5.
We performed differential time-series photometry, through an Sloan
Digital Sky Survey r filter, at the position of PSR J1555-2908 using
the 2.4m Hiltner telescope of the MDM Observatory on 2018-Jun-12 and
-15. Integrations of 5 minutes each were obtained for a total of
7.16hr over the two nights. See Section 6.
Objects:
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RA (ICRS) DE Designation(s) (Per)
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15 55 40.65 -29 08 28.4 PSR J1555-2908 = 4FGL J1555.7-2908 (P=0.233500268)
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
fig5.dat 34 67 MDM 2.4m r-band light curve of PSR J1555-2908
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See also:
B/psr : ATNF Pulsar Catalogue (Manchester+, 2005)
VIII/65 : 1.4GHz NRAO VLA Sky Survey (NVSS) (Condon+ 1998)
J/ApJS/208/17 : 2nd Fermi LAT cat. of gamma-ray pulsars (2PC) (Abdo+, 2013)
J/ApJ/769/108 : Optical photometry of 4 millisecond pulsars (Breton+, 2013)
J/ApJ/810/85 : Obs. of first Fermi-LAT sources at Parkes (Camilo+, 2015)
J/ApJ/814/128 : Timing noise & astrometry of Fermi-LAT pulsars (Kerr+, 2015)
J/A+A/598/A78 : The GMRT 150MHz all-sky radio survey (Intema+, 2017)
J/ApJ/872/42 : Opt. sp. of redback ms pulsar binaries (Strader+, 2019)
J/ApJS/247/33 : The Fermi LAT fourth source catalog (4FGL) (Abdollahi+, 2020)
Byte-by-byte Description of file: fig5.dat
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Bytes Format Units Label Explanations
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1- 11 F11.5 d MJD [58281.16/58284.3] Modified Julian Date of
mid-exposure in Barycentric Dynamical Time (BDT)
13- 15 I3 s Exp [300] Exposure time
17- 21 F5.3 --- Phase [0.36/1.14] Orbital phase of mid-exposure (1)
23- 28 F6.3 mag rmag [20.2/23.3] Apparent r band AB magnitude
30- 34 F5.3 mag e_rmag [0.028/0.4] Uncertainty in rmag
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Note (1): Using the ephemeris in Table 2. Phase zero is the time of
ascending node of the pulsar.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 19-Jan-2024