Пример #1
0
def test_download_db():
    """
    Try downloading the database with the socket disabled.
    """

    with pytest.raises(RuntimeError):
        query = QueryATNF(checkupdate=True)
Пример #2
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def test_bad_database():
    """
    Try loading in random file.
    """

    baddbfile = 'sdhfjjdf'  # bad database file
    with pytest.raises(RuntimeError):
        query = QueryATNF(loadfromdb=baddbfile)
Пример #3
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def qpsr(sample_ra=6.02363, sample_dec=-72.08128):
    (ra, dec) = deg2HMS(ra=sample_ra, dec=sample_dec)
    c = [ra, dec, 1]
    #c=['00h24m05.67s','-72d04m52.62s',1]
    logging.info(f'Querying with  {c}')
    query = QueryATNF(
        params=['BNAME', 'JNAME', 'RAJ', 'DECJ', 'DM', 'S1400', 'P0'],
        circular_boundary=c,
        include_errs=False)
    return query, query.table[:5]
Пример #4
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def test_save_load_file(query):
    """
    Test saving and reloading a query as a pickle file.
    """

    # test exception handling
    testfilebad = '/jkshfdjfd/jkgsdfjkj/kgskfd.jhfd'

    with pytest.raises(IOError):
        query.save(testfilebad)

    # test exception handling
    with pytest.raises(IOError):
        querynew = QueryATNF(loadquery=testfilebad)

    testfile = os.path.join(os.getcwd(), 'query.pkl')
    query.save(testfile)

    # re-load in as a new query
    querynew = QueryATNF(loadquery=testfile)

    assert query.num_pulsars == querynew.num_pulsars
Пример #5
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def import_pulsars(use_epn=True):
    """Import pulsar info from ATNF."""
    from psrqpy import QueryATNF

    query = QueryATNF()
    df = query.pandas

    db = pd.DataFrame()

    def calc_bandwidth(row):
        bw = 500

        s400 = ~np.isnan(row.S400)
        s1400 = ~np.isnan(row.S1400)
        s2000 = ~np.isnan(row.S2000)

        if s400 & s1400:
            bw += (1400 - 400)
        if (s400 & s2000) or (s400 & s1400 & s2000):
            bw += (2000 - 400)
        if s1400 & s2000:
            bw += (2000 - 1400)
        if sum((s400, s1400, s2000)) == 0:
            bw = np.nan

        return bw

    # Observing bandwidth
    db['bw'] = df.apply(calc_bandwidth, axis=1)  # MHz

    def calc_flux(row):
        return max([row.S400, row.S1400, row.S2000])

    # Pseudo luminosity in Jy*kpc**2
    db['pseudo_lum'] = df.apply(calc_flux, axis=1) * 1e-3 * df.DIST_DM**2
    # Pulse width
    db['w_eff'] = df['W10'] * 1e-3  # ms -> s
    # Object type
    db['type'] = 'pulsar'

    # Find bw from EPN if available
    if use_epn:
        db['name'] = df.NAME
        epn_db = bw_from_epn()
        epn_db['bw'] += 500  # Set a default of 500 MHz
        merged_db = pd.merge(db, epn_db, on='name')
        merged_db['bw'] = merged_db[['bw_x', 'bw_y']].apply(np.max, axis=1)
        merged_db.drop(['bw_x', 'bw_y'], inplace=True, axis=1)
        return merged_db
    else:
        return db
Пример #6
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 def do_query(self):
     """
     Query ATNF 
     """
     params = ['JNAME', 'RAJ', 'DECJ', 'S1400', 'DM', 'P0']
     condition = "S1400 > 1 && DECJ > -35"
     print("Querying ATNF pulsar catalogue")
     tstart = time.time()
     result = QueryATNF(params=params, condition=condition)
     time_taken = time.time() - tstart
     print("Query took {:.1f} seconds".format(time_taken))
     print("Found {} pulsars for {}".format(len(result.table), condition))
     self.ATNFtable = result.table
     # store coordinates as SkyCoord
     self.ATNFtable['coordinates'] = SkyCoord(self.ATNFtable['RAJ'],
                                              self.ATNFtable['DECJ'],
                                              unit=(u.hourangle, u.deg))
def get_pwn_cutoff(ra, dec, rad_search=2., deathline=1.e34):
    """
    Set cutoff for PWN based on association with pulsars in ATNF catalog
    Only pulsars with Edot > 1.e34 erg/s are considered, because cutoffs at ~1 TeV
    should have already been detected
    :param ra: R.A. of PWN center, deg
    :param dec: Dec. of PWN center, deg
    :param rad_search: search radius, deg
    :param deathline: minimum Edot, erg/s
    :return:
    """
    # convert coordinates to astropy SkyCoord
    c = SkyCoord(ra, dec, frame='icrs', unit='deg')
    # extract ra, dec in the format required by psrqpy
    ra_hms, dec_dms = c.to_string('hmsdms').split(' ')
    # define circular search region
    search_region = [ra_hms, dec_dms, rad_search]
    # query ATNF catalog
    psrs = QueryATNF(params=['JNAME', 'RAJ', 'DECJ', 'EDOT', 'AGE'],
                     circular_boundary=search_region,
                     condition='EDOT > {}'.format(deathline))
    if len(psrs) == 0:
        # no PSR found, setting random cutoff
        ecut = get_random_cutoff()
    else:
        if len(psrs) == 1:
            # 1 pulsar found
            s = 0
        else:
            # multiple pulsars found
            # pulsars position in SkyCoord form
            cpsrs = SkyCoord(ra=psrs['RAJ'],
                             dec=psrs['DECJ'],
                             frame='icrs',
                             unit=(u.hourangle, u.deg))
            # calculate angular separation between pulsars and PWN
            sep = cpsrs.separation(c)
            # select closest pulsar
            s = np.where(sep == np.min(sep))[0][0]
        # assume E_gamma = 0.03 E_e in deep KN regime, convert to TeV
        ecut = 0.01 * 1.e-12 * Emax_pwn(psrs['AGE'][s], psrs['EDOT'][s])

    return ecut
Пример #8
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names_cat[6] = names[6] + '+2551'
names.remove(names[6])
names_cat.remove(names_cat[6])

print('Select Source', flush=True)
Test_source = 'J1643-1224'

print('Define Simulation Parameters', flush=True)
times_str = np.load('./binarytimestamps/times_%s.npy' %
                    Test_source).astype(str)
times = Time(times_str)

##Knowns
if not os.path.isfile('%s_params.npy' % Test_source):
    try:
        query = QueryATNF(psrs=names_cat)
        psrs = query.get_pulsars()
        cat = True
    except:
        print('psrqpy not available', flush=True)
        sys.exit()
    PSR = psrs[Test_source]
    dp = PSR.DIST_DM1 * u.kpc
    Om_peri = PSR.OM * u.deg
    Om_peri_dot = PSR.OMDOT * u.deg / u.year
    A1 = PSR.A1 * u.s * const.c
    Ecc = PSR.ECC
    Pb = PSR.PB * u.day
    if str(PSR.T0) == '--':
        TASC = Time(PSR.TASC, format='mjd')
        T0 = Time(brentq(orbfits.T0_find,
Пример #9
0
def get_atnf_version():

    return QueryATNF().get_version
    def __init__(self,
                 download=False,
                 correct_for_pm=True,
                 th=True,
                 wanted_names=[]):
        if download:
            # Runs if you don't have a recently downloaded version of the ATNF catalog.
            # Turn this off if you already have a downloaded catalog as it slows the code down quite a bit.
            query = QueryATNF(condition='!type(RRAT)', include_refs=True)
            query.save('all_ATNF.npy')
        else:
            # Loading the ATNF catalog from a .npy file. This won't work if you
            # haven't saved it to a .npy file yet. See commented lines above.

            query = QueryATNF(loadquery='all_ATNF.npy')
            numstring = 'Using ATNF catalogue version {} which contains {} pulsars.'
            print(numstring.format(query.get_version, query.num_pulsars))

        # Desired query parameters from the ATNF catalog saved version
        self.table = table = query.table

        # not PM corrected RAJ: Right ascension(J2000)(hh:mm:ss.s)
        # not PM corrected DecJ: Declination(J2000)(+dd:mm:ss)
        self.raj_UNCORRECTED = np.asarray(table['RAJ'])
        self.decj_UNCORRECTED = np.asarray(table['DECJ'])

        # RAJD: Right ascension(J2000)(degrees)
        # DecJD: Declination(J2000)(degrees)
        self.rajd = np.asarray(table['RAJD'])
        self.decjd = np.asarray(table['DECJD'])

        self.glon = np.nan_to_num(np.asarray(table["GL"]))
        self.glat = np.nan_to_num(np.asarray(table["GB"]))

        # RAJ & DECJ error
        raj_err = np.asarray(table['RAJ_ERR'])
        self.raj_err = np.nan_to_num(raj_err, 100000)
        decj_err = np.asarray(table['DECJ_ERR'])
        self.decj_err = np.nan_to_num(decj_err, 100000)  # if pm correction on

        # Epoch of position, defaults to PEpoch (MJD)
        self.pos_epoch = np.asarray(table['POSEPOCH'])

        # Epoch of period or frequency (MJD)
        self.period_epoch = np.asarray(table['PEPOCH'])

        # Mean flux density at 400 MHz (mJy)
        self.fluxes = np.asarray(table['S400'])

        #  B and J names of pulsars
        self.bnames = np.asarray(table['BNAME'])
        self.jnames = np.asarray(table['JNAME'])
        self.type = np.asarray(table['TYPE'])
        self.type = ["Radio" if str(x) == "nan" else x for x in self.type]

        # Proper motion of RA in degrees
        pm_ra = np.asarray(table['PMRA'])
        self.pm_ra = np.nan_to_num(
            pm_ra) / 3.6e6  # converting to degrees and removing nans

        # Proper motion of DEC in degrees
        pm_dec = np.asarray(table['PMDEC'])
        self.pm_dec = np.nan_to_num(
            pm_dec) / 3.6e6  # converting to degrees and removing nans

        # Proper motion of RA in degrees
        pm_ra_err = np.asarray(table['PMRA_ERR'])
        self.pm_ra_err_mas = pm_ra_err
        self.pm_ra_err_deg = np.nan_to_num(
            pm_ra_err,
            100000) / 3.6e6  # converting to degrees and removing nans

        # Proper motion of DEC in degrees
        pm_dec_err = np.asarray(table['PMDEC_ERR'])
        self.pm_dec_err_mas = pm_dec_err
        self.pm_dec_err_deg = np.nan_to_num(
            pm_dec_err,
            100000) / 3.6e6  # converting to degrees and removing nans

        # time of position observation (MJD)
        time_pos = np.asarray(table['POSEPOCH'])
        self.time_pos = np.nan_to_num(time_pos)

        # time of period observation (MJD)
        time_per = np.asarray(table['PEPOCH'])
        self.time_per = np.nan_to_num(time_per)

        self.references = np.asarray(table['SURVEY'])
        fluxes = np.asarray(table['S400'])
        self.fluxes = fluxes
        self.convert()
        self.tau_s = np.asarray(table['TAU_SC'])
        self.tau_400 = self.tau_s * (
            ((400e6)**(-4.4)) /
            ((1e9)**(-4.4)))  # scattering time scaled to 400 MHz in seconds
        self.distance = self.table['DIST']  # in kpc
        self.distance_DM = self.table['DIST_DM']  # in kpc
        self.theta_atnf = []
        self.tau_400_NE2001 = []
        if th:
            # in milliarcseconds
            self.theta_NE2001 = []
            self.theta_NE2001_DM = []

            for glon, glat, distance, distance_dm, name, tau_400 in zip(
                    self.glon, self.glat, self.distance, self.distance_DM,
                    self.jnames, self.tau_400):
                if not isinstance(distance, float) or not isinstance(
                        distance_dm, float):
                    theta = np.nan
                    theta_DM = np.nan
                    atnf = np.nan
                else:
                    theta = self.convert_taus_thetas(glon, glat, distance)
                    theta_DM = self.convert_taus_thetas(
                        glon, glat, distance_dm)
                    atnf = self.convert_taus_thetas(glon,
                                                    glat,
                                                    distance,
                                                    tau_400,
                                                    ne2001=False)
                self.theta_atnf.append(atnf)
                self.theta_NE2001.append(theta)
                self.theta_NE2001_DM.append(theta_DM)
        else:
            self.theta_atnf = np.zeros(len(self.distance))
            self.theta_NE2001 = np.zeros(len(self.distance))
            self.theta_NE2001_DM = np.zeros(len(self.distance))

        if correct_for_pm:
            self.correct_pm()

        # Getting specific ATNF pulsar corrected properties
        wanted_data = {
            "bname": [],
            "jname": [],
            "ra (degrees)": [],
            "dec (degrees)": [],
            "ra_err (degrees)": [],
            "dec_err (degrees)": [],
            "pm_ra (degrees)": [],
            "pm_dec (degrees)": [],
            "pm_ra_err (degrees)": [],
            "pm_dec_err (degrees)": [],
            "type": [],
            "survey": []
        }
        if len(wanted_names) > 0:
            for bname, jname, ra, dec, ra_err, dec_err, pm_ra, pm_dec, pm_ra_err, pm_dec_err, type, survey in zip(
                    self.bnames, self.jnames, self.rajd, self.decjd,
                    self.raj_err, self.decj_err, self.pm_ra, self.pm_dec,
                    self.pm_ra_err_deg, self.pm_dec_err_deg, self.type,
                    self.references):
                if bname in wanted_names or jname in wanted_names:
                    wanted_data["bname"].append(bname)
                    wanted_data["jname"].append(jname)
                    wanted_data["ra (degrees)"].append(ra)
                    wanted_data["dec (degrees)"].append(dec)
                    wanted_data["ra_err (degrees)"].append(ra_err)
                    wanted_data["dec_err (degrees)"].append(dec_err)
                    wanted_data["pm_ra (degrees)"].append(pm_ra)
                    wanted_data["pm_dec (degrees)"].append(pm_dec)
                    wanted_data["pm_ra_err (degrees)"].append(pm_ra_err)
                    wanted_data["pm_dec_err (degrees)"].append(pm_dec_err)
                    wanted_data["type"].append(type)
                    wanted_data["survey"].append(survey)
        wanted_df = pandas.DataFrame(wanted_data)
        wanted_df.to_csv("daniele_pulsar.csv")
Пример #11
0
if args.load:
    df = pd.read_pickle(args.load)
else:
    psrlist = np.genfromtxt(args.psrlist,
                            dtype=str,
                            comments="#",
                            autostrip=True)
    psrcat_params = np.genfromtxt(args.psrcat_params,
                                  dtype=str,
                                  comments="#",
                                  autostrip=True)

    psrlist = psrlist.tolist()
    psrcat_params = psrcat_params.tolist()

    query = QueryATNF(psrs=psrlist, params=psrcat_params)

    #Saving the entire catalogue too
    df_cat = query.catalogue
    df_cat = df_cat[[
        'JNAME', 'BNAME', 'RAJ', 'RAJ_ERR', 'DECJ', 'DECJ_ERR', 'F0', 'F0_ERR',
        'F1', 'F1_ERR', 'P0', 'P0_ERR', 'P1', 'P1_ERR', 'DM', 'DM_ERR', 'RM',
        'RM_ERR', 'DIST', 'ASSOC', 'PB', 'PB_ERR', 'BINCOMP', 'AGE', 'BSURF',
        'EDOT', 'NGLT'
    ]]
    #Removing TPA pulsars from the full catalogue pickle file
    indices = df_cat[df_cat["JNAME"].isin(psrlist)].index
    df_cat.drop(indices, inplace=True)
    if args.save:
        df_cat.to_pickle(args.save + "_fullcat.pckl")
Пример #12
0
def query_atnf():
    return QueryATNF(loadfromdb='test/derived_catalogue.db')
Пример #13
0
def query_derived():
    return QueryATNF(loadfromdb='test/test_catalogue.db')
Пример #14
0
def query():
    return QueryATNF()
Пример #15
0
parser.add_argument('-th',type=int,default=80,help='Number of Threads')
parser.add_argument('-nT',type=int,default=8,help='Number of Temperatures')
parser.add_argument('-nb',type=int,default=1000,help='Burn Steps')
parser.add_argument('-dir',type=str,default='./',help='Data Directory')
parser.add_argument('-srce',type=str,default=None,help='Source Name')

args=parser.parse_args()

dirname=args.dir
Source=args.srce

print('Load Parameters',flush=True)
##Knowns
if not os.path.isfile('%s/%s_params.npy' %(dirname,Source)):
    try:
        query=QueryATNF(psrs=list([Source]))
        psrs = query.get_pulsars()
        cat=True
    except:
        print('psrqpy not available',flush=True)
        sys.exit()
    PSR = psrs[Source]
    dp = PSR.DIST_DM1 * u.kpc
    Om_peri = PSR.OM * u.deg
    Om_peri_dot = PSR.OMDOT * u.deg / u.year
    A1 = PSR.A1 * u.s * const.c
    Ecc = PSR.ECC
    Pb = PSR.PB * u.day
    if str(PSR.T0) == '--':
        TASC = Time(PSR.TASC, format='mjd')
        T0 = Time(brentq(orbfits.T0_find,
Пример #16
0
    def __init__(self, name, data=None, sigma=None):
        self.name = name

        if not os.path.isfile('%s_params.npy' % self.name):
            try:
                query = QueryATNF(psrs=[self.name])
                psrs = query.get_pulsars()
                cat = True
            except:
                print('psrqpy not available', flush=True)
                sys.exit()
            PSR = psrs[self.name]

            self.dp = parameter(PSR.DIST_DM1 * u.kpc)
            if not PSR.DIST_DM1_ERR == None:
                sig = PSR.DIST_DM1_ERR
                self.dp.lnprior = lambda x: np.exp(.5 * (
                    (x - self.dp.val.value) / sig)**2) / np.sqrt(2 * np.pi *
                                                                 err**2)
                self.dp.fixed = False

            self.Om_peri = parameter(PSR.OM * u.deg)
            if not PSR.OM_ERR == None:
                sig = PSR.OM_ERR
                self.Om_peri.lnprior = lambda x: np.exp(.5 * (
                    (x - self.Om_peri.val.value) / sig)**2) / np.sqrt(2 * np.pi
                                                                      * err**2)
                self.Om_peri.fixed = False

            self.Om_peri_dot = parameter(PSR.OMDOT * u.deg / u.year)
            if not PSR.OMDOT_ERR == None:
                sig = PSR.OMDOT_ERR
                self.Om_peri_dot.lnprior = lambda x: np.exp(.5 * (
                    (x - self.Om_peri_dot.val.value) / sig)**2) / np.sqrt(
                        2 * np.pi * err**2)
                self.Om_peri_dot.fixed = False

            self.A1 = parameter(PSR.A1 * u.s * const.c)
            if not PSR.A1_ERR == None:
                sig = PSR.A1_ERR * const.c.value
                self.A1.lnprior = lambda x: np.exp(.5 * (
                    (x - self.A1.val.value) / sig)**2) / np.sqrt(2 * np.pi *
                                                                 err**2)
                self.A1.fixed = False

            self.Ecc = parameter(PSR.ECC)
            if not PSR.ECC_ERR == None:
                sig = PSR.ECC_ERR
                self.Ecc.lnprior = lambda x: np.exp(.5 * (
                    (x - self.A1.val) / sig)**2) / np.sqrt(2 * np.pi * err**2)
                self.Ecc.fixed = False

            self.Pb = parameter(PSR.PB * u.day)
            if not PSR.PB_ERR == None:
                sig = PSR.PB_ERR
                self.Pb.lnprior = lambda x: np.exp(.5 * (
                    (x - self.Pb.val.value) / sig)**2) / np.sqrt(2 * np.pi *
                                                                 err**2)
                self.Pb.fixed = False
            if str(PSR.T0) == '--':
                TASC = Time(PSR.TASC, format='mjd')
                self.T0 = parameter(
                    Time(brentq(orbfits.T0_find,
                                TASC.mjd, (TASC + Pb).mjd,
                                args=(TASC, -Om_peri, Pb, Ecc)),
                         format='mjd'))
                if not PSR.TASC_ERR == None:
                    sig = PSR.TASC_ERR
                    self.T0.lnprior = lambda x: np.exp(.5 * (
                        (x - self.T0.val.mjd) / sig)**2) / np.sqrt(2 * np.pi *
                                                                   err**2)
                    self.T0.fixed = False
            else:
                self.T0 = parameter(Time(PSR.T0, format='mjd'))
                if not PSR.T0_ERR == None:
                    sig = PSR.PB_ERR
                    self.T0.lnprior = lambda x: np.exp(.5 * (
                        (x - self.T0.val.mjd) / sig)**2) / np.sqrt(2 * np.pi *
                                                                   err**2)
                    self.T0.fixed = False

            self.pm_ra = parameter(
                (PSR.PMRA * u.mas / u.year).to_value(u.rad / u.s) / u.s)
            if not PSR.PMRA_ERR == None:
                sig = (PSR.PMRA_ERR * u.mas / u.year).to_value(u.rad / u.s)
                self.pm_ra.lnprior = lambda x: np.exp(.5 * (
                    (x - self.pm_ra.val.value) / sig)**2) / np.sqrt(2 * np.pi *
                                                                    err**2)
                self.pm_ra.fixed = False

            self.pm_dec = parameter(
                (PSR.PMDec * u.mas / u.year).to_value(u.rad / u.s) / u.s)
            if not PSR.PMDec_ERR == None:
                sig = (PSR.PMDec_ERR * u.mas / u.year).to_value(u.rad / u.s)
                self.pm_dec.lnprior = lambda x: np.exp(.5 * (
                    (x - self.pm_dec.val.value) / sig)**2) / np.sqrt(2 * np.pi
                                                                     * err**2)
                self.pm_dec.fixed = False
            self.srce = SkyCoord.from_name('PSR %s' % Test_source)
            np.save(
                '%s_params.npy' % Test_source,
                np.array([
                    dp.value, Om_peri.value, Om_peri_dot.value, A1.value, Ecc,
                    Pb.value, T0.mjd, pm_ra.value, pm_dec.value,
                    self.srce.ra.to_value(u.deg),
                    self.srce.dec.to_value(u.deg)
                ]))

        self.Om_orb = parameter(180, lambda x: bound_prior(x, 0, 360))
        self.Om_scr = parameter(0,
                                lambda x: bound_prior(x, -90, 90),
                                fixed=False)
        self.inc = parameter(45, lambda x: bound_prior(x, 0, 1), fixed=False)
        self.s = parameter(.5, lambda x: bound_prior(x, 0, 1), fixed=False)
        self.data = data
        self.sigma = sigma
Пример #17
0
def main():
    # default parameters to query
    params = ["NAME", "BNAME", "RAJ", "DECJ", "DM", "P0", "S1400"]

    parser = argparse.ArgumentParser(
        formatter_class=argparse.RawTextHelpFormatter,
        description=
        "For a given pointing, determine which pulsars are in the field and "
        "in which compound beam they are.")

    parser.add_argument(
        "--ra",
        required=True,
        help="Right Ascension of pointing in hh:mm:ss.s format")
    parser.add_argument("--dec",
                        required=True,
                        help="Declination of pointing in dd:mm:ss.s format")
    parser.add_argument(
        "--freq",
        type=float,
        default=1370,
        help=
        "Observing frequency (MHz), used to determine size of compound beams. "
        "If max_dist is used, the frequency is only used for plotting the CBs."
        "(Default: %(default)s)")
    parser.add_argument(
        "--max_dist",
        type=float,
        help="Maximum distance from CB center (arcmin) to be considered "
        "in the CB. (Default: twice half-power width)")
    parser.add_argument("--condition",
                        type=str,
                        help="Search condition when querying psrcat, e.g. "
                        "'S1400 > 1'")
    parser.add_argument("--more_info",
                        action="store_true",
                        help="Add pulsar parameters to output")
    parser.add_argument(
        "--params",
        nargs="+",
        default=params,
        help=f"Space-separated list of pulsar parameters to show "
        f"when more_info=True. (Default: {' '.join(params)})")
    parser.add_argument("--plot",
                        action="store_true",
                        help="Plot CB pattern with pulsar locations")

    # print help if no arguments are given
    if len(sys.argv) == 1:
        parser.print_help()
        sys.exit(1)

    args = parser.parse_args()

    # set max dist if not given
    half_power_width = get_half_power_width(args.freq * u.MHz)
    if args.max_dist is None:
        args.max_dist = 2 * half_power_width.to(u.arcmin).value

    # query ATNF for pulsars in a 4x4 degree FoV, which covers more than the entire Apertif FoV
    bound = [args.ra, args.dec, 4]
    # params to query should always include NAME, RAJ and DECJ
    query_params = args.params[:]
    for key in ["NAME", "RAJ", "DECJ"]:
        if key not in query_params:
            query_params.append(key)
    print("Querying ATNF")
    # for some reason the query gives a RuntimeWarning, suppress it
    with warnings.catch_warnings():
        warnings.simplefilter("ignore", category=RuntimeWarning)
        results = QueryATNF(params=query_params,
                            circular_boundary=bound,
                            condition=args.condition)

    if len(results) == 0:
        print("No pulsars found")
        sys.exit()

    # find the pointing of each CB
    pointing = SkyCoord(args.ra, args.dec, unit=(u.hourangle, u.deg))
    cb_pointings = []
    for cb in range(NCB):
        cb_ra, cb_dec = tools.cb_index_to_pointing(cb, pointing.ra,
                                                   pointing.dec)
        cb_pointings.append(SkyCoord(cb_ra, cb_dec))

    # check the closest CB for each pulsar
    output = []
    pulsar_coords = []
    pulsar_found = False
    print("Locating pulsars in Apertif Compound Beams")
    for psr in results.table:
        psr_coord = SkyCoord(psr["RAJ"],
                             psr["DECJ"],
                             unit=(u.hourangle, u.deg))
        # get separation from each CB and find minimum
        separations = [
            psr_coord.separation(beam).to(u.arcmin).value
            for beam in cb_pointings
        ]
        # index of lowest separation is best CB
        best_cb = np.argmin(separations)
        # check the separation itself
        sep = separations[best_cb]
        # if too far away, skip this pulsar
        # sep must be in acrmin here
        if sep > args.max_dist:
            continue
        # a good pulsar was found
        pulsar_found = True
        # store info
        output.append([best_cb, sep, psr])
        pulsar_coords.append([psr["NAME"], psr_coord])

    if not pulsar_found:
        print("No pulsars found")
        sys.exit()

    # print info sorted by CB
    output = np.array(output)
    order = np.argsort(output[:, 0])

    print("Pulsars found:")
    for cb, sep, psr in output[order]:
        print(
            f"PSR {psr['NAME']} in CB{cb:02d}, separation from CB centre: {sep:.2f}'"
        )
        if args.more_info:
            for p in args.params:
                # get value and unit
                value = psr[p]
                unit = psr.columns[p].unit
                dtype = psr.columns[p].dtype
                # format according to dtype
                if dtype == np.float:
                    formatted_value = f" {p} = {value:.2f}"
                else:
                    formatted_value = f" {p} = {value}"
                # add unit
                if unit is not None:
                    formatted_value += f" {unit}"
                # add newline
                print(formatted_value)
            print()

    if args.plot:
        make_plot(cb_pointings, pulsar_coords, half_power_width)