Multiwavelength pulsar-wind nebula database

 

 

The database  includes pulsars which are known to have pulsar-wind nebulae (PWNe) as well as pulsars where PWNe could be detected in future.  Currently, there are 102 pulsars in the database. Of these most are detected as radio pulsars but some are only detected in X-rays.  For each of these pulsars the following parameters can be requested from the database:

 

Positional parameters:

 

Pulsar names (Name, PSRB)

Pulsar position coordinates (RaJ, DecJ)

Epoch corresponding to the position (PosEpoch), MJD

Pulsar proper motion and parallax (if available; PMRA, PMDec, PX), in arcs

Best estimate of the distance (Dist), in pc

Association with other objects (if available; Assoc)

 

Timing parameters:

 

Period (if known; P0), s

Period derivative (if known; P1), s/s

Frequency (F0), Hz

Frequency derivative (first; F1) s^-2

Frequency derivative (second; F2) s^-3

Epoch of period measurement (PEpoch), MJD

 

 

Radio parameters (if available):

 

Dispersion measure (DM), pc/cm^3

Mean flux density at 1.4 GHz (S1400), mJy

Spectral index (SPINDEX)

Distance from the Galactic plane (ZZ), in pc

Distance based on the Taylor & Cordes (1993) model (Dist_DM)

Distance based on the Cordes & Lazio (2002) model (Dist_DM1)

 

 

X-ray parameters  (if available)

 

Observation details

 

Chandra Observation(s) IDs (CH_OBSID)

Chandra Exposure(s) Times (CH_TEXP), in ks

Detector used,  e.g., ACIS-I or ACIS-S (CH_DET)

Observing mode, e.g., TIMED/Frame_time or CC, subarray etc. (CH_DET_MODE)

X-ray pulsar parameters:

 

Observed pulsar (PSR) count rate with Chandra ACIS (XPSR_CR), cts/s

Pulsar's absorbed X-ray flux in 0.3-8 keV band (XPSR_FL0), erg/s/cm^2

Estimated pile-up fraction (XPSR_PFR)

 

 

Pulsar's unabsorbed X-ray flux in 0.5-8 keV band (from the PL model or component fitted in 0.5-8 keV; XPSR_FL1), erg/cm^2/s

Pulsar's unabsorbed X-ray flux in 2-8 keV band (from the PL model or component fitted in 2-8 keV; XPSR_FL2), erg/cm^2/s

Hydrogen column for the best-fit spectral model, e.g., PL, PL+BB, PL+BB+BB (XPSR_nH1), in 10^22 cm^-2

 

Power-law fit parameters

 

 

Photon index for the best-fit power-law (PL) model (component) fitted to the PSR spectrum in 0.5-8 keV band (XPSRPL_G1).

Normalization for the best-fit power-law (PL) model fitted to the PSR spectrum in 0.5-8 keV band (XPSRPL_N1), photons/s/cm^2/keV.

Reduced Chi-squared (or Cstat/#d.o.f.) for the best-fit absorbed PL model (or PL+BB, PL+BB+BB models) fitted in 0.5-8.0 keV band (XPSR_CHI1).

 

Photon index for the best-fit power-law (PL) model fitted to the PSR spectrum in 2-8 keV band (XPSRPL_G2).

Normalization for the best-fit power-law (PL) model fitted to the PSR spectrum in 2-8 keV band (XPSRPL_N2), photons/s/cm.

Reduced Chi-squared (or Cstat/#d.o.f.) for the best-fit absorbed PL model fitted in 2-8 keV band (XPSR_CHI2).

 

 

Blackbody fit parameters

 

Bolometric flux for the black-body (BB) model (component; soft BB component if BB+BB model is fitted; XPSR_FB), erg/cm^2/s.

Hydrogen column for the best-fit absorbed BB (or BB+BB) model (XPSR_nHB), 10^22 cm^-2

The temperature for the best fit BB model (component; soft BB component if BB+BB model is fitted; XPSRBB_T), keV

Blackbody normalization from the XSPEC BBODYRAD model (or model component;   XPSRBB_N), (R_km/D_10kpc)^2

Reduced Chi-squared (or Cstat/#d.o.f.) for the best-fit absorbed BB (or BB+BB) model fitted in 0.5-8.0 keV band (XPSR_CHIB)

 

 

X-ray PWN parameters:

 

Is there a pulsar-wind nebula ? (XPWN)

Approximate extent of the observed X-ray emission (XPWN_SIZE), in arcseconds

Brief description of a PWN morphology (XPWN_MRF)

PWN X-ray spectrum  (XPWN_SPF)

 

Observed Chandra ACIS count rate (XPWN_CR), cts/s 

Absored X-ray flux of a PWN  in 0.5-8 keV (XPWN_FL0), erg/cm^2/

Unabsored X-ray flux of a PWN  in 0.5-8 keV (XPWN_FL1), erg/cm^2

Unabsored X-ray flux of a PWN in 2-8 keV (XPWN_FL2), erg/cm^2/s

Hydrogen column from WABS XSPEC component for the absorbed PL model fitted to the PWN spectrum in 0.5-8 keV (XPWN_nH1), 10^22 cm^-2

 

Power-law photon index for the absorbed PL model fitted to the PWN spectrum in 0.5-8 keV  (XPWNPL_G1).

Normalization (at 1 keV) for the absorbed PL model fitted to the PWN spectrum in 0.5-8 keV (XPWNPL_N1), photons/s/cm^2/keV.

Reduced Chi-squared (or Cstat/#d.o.f.) for the absorbed PL model fitted in 0.5-8 keV (XPWN_CHI1).

Power-law photon index for the absorbed PL model fitted to the PWN spectrum in 2-8 keV (XPWNPL_G2).

Normalization (at 1 keV) for the absorbed PL model fitted to the PWN spectrum in 2-8 keV band (XPWNPL_N2), photons/s/cm^2/keV.

Reduced Chi-squared (or Cstat/#d.o.f.) for the absorbed PL model fitted in 2-8 keV (XPWN_CHI2).

 

 

TeV PWN parameters:

 

TeV source name (if any; TEV_NAME)

Celestial coordinates of the TeV source (TEV_RA, TEV_DEC)

Galactic coordinates of the TeV source (TEV_GAL_LONG, TEV_GAL_LAT)

TeV flux (TEV_FLUX), in Crab units

TeV Spectral Index from PL fit (TEV_PL_INDEX)

 

 

GeV pulsar/PWN  parameters:

 

GeV source name (if any; GEV_NAME)

GeV flux (GEV_FLUX), in Crab units

GeV Spectral Index from PL or cutoff-PL fit whichever is best (GEV_PL_INDEX)

Cutoff energy if best fit model is  cutoff-PL (GEV_E_CUTOFF), in GeV

 

 

 

 

User can access master Table by simply clicking “Table” button. In addition to pre-selected basic parameter the Master Table includes links (in last column) to the individual source pages which (depending of the source) may include X-ray, TeV, or GeV images, spectral plots, and best-fit spectral model parameters. Alternatively, user can choose other parameters on the main webpage by selecting check marks and then clicking the Table button.

 

In addition, the main page includes links to the TeV sources which could be relic PWNe but there are no known pulsars corresponding to these sources. Finally,  the “Hess data” link provides access to the data on 20 published HESS sources. These data include surface brightness maps, spectral data points, and significance maps.

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