def time_infinite(self):
""" Time in mjd where burst is at infinite frequency
"""
delay = util.calc_delay(1e5, self.time_top, self.dmarr[self.loc[2]],
self.state.inttime)
return self.time_top - delay
def pipeline_seg2(st, segment, cfile=None, vys_timeout=vys_timeout_default):
""" Submit pipeline processing of a single segment to scheduler.
No multi-threading or scheduling.
"""
# plan fft
wisdom = search.set_wisdom(st.npixx, st.npixy)
data = source.read_segment(st, segment, timeout=vys_timeout, cfile=cfile)
data_prep = source.data_prep(st, data)
for dmind in range(len(st.dmarr)):
delay = util.calc_delay(st.freq, st.freq.max(), st.dmarr[dmind],
st.inttime)
data_dm = search.dedisperse(data_prep, delay)
for dtind in range(len(st.dtarr)):
data_dmdt = search.resample(data_dm, st.dtarr[dtind])
canddatalist = search.search_thresh(st,
data_dmdt,
segment,
dmind,
dtind,
wisdom=wisdom)
features = candidates.calc_features(canddatalist)
search.save_cands(st, features, canddatalist)
def pipeline_datacorrect(st, candloc, data_prep=None):
""" Prepare and correct for dm and dt sampling of a given candloc
Can optionally pass in prepared (flagged, calibrated) data, if available.
"""
from rfpipe import util
import rfpipe.search
if data_prep is None:
data_prep = pipeline_dataprep(st, candloc)
segment, candint, dmind, dtind, beamnum = candloc
dt = st.dtarr[dtind]
dm = st.dmarr[dmind]
scale = None
if hasattr(st, "rtpipe_version"):
scale = 4.2e-3 if st.rtpipe_version <= 1.54 else None
delay = util.calc_delay(st.freq,
st.freq.max(),
dm,
st.inttime,
scale=scale)
data_dmdt = rfpipe.search.dedisperseresample(
data_prep,
delay,
dt,
parallel=st.prefs.nthread > 1,
resamplefirst=st.fftmode == 'cuda')
return data_dmdt
def pipeline_datacorrect(st, candloc, data_prep=None):
""" Prepare and correct for dm and dt sampling of a given candloc
Can optionally pass in prepared (flagged, calibrated) data, if available.
"""
if data_prep is None:
data_prep = pipeline_dataprep(st, candloc)
segment, candint, dmind, dtind, beamnum = candloc.astype(int)
dt = st.dtarr[dtind]
dm = st.dmarr[dmind]
scale = None
if hasattr(st, "rtpipe_version"):
scale = 4.2e-3 if st.rtpipe_version <= 1.54 else None
delay = util.calc_delay(st.freq,
st.freq.max(),
dm,
st.inttime,
scale=scale)
data_dm = search.dedisperse(data_prep, delay)
data_dmdt = search.resample(data_dm, dt)
return data_dmdt
def calc_cand_integration(cd):
"""
Calculates the integration of the candidate using the canddata.
The integration is calcualted with respect to the start of the SDM,
referenced to the max frequency of the band.
"""
segment, candint, dmind, dtind, beamnum = cd.loc
st = cd.state
dm = st.dmarr[dmind]
name = cd.state.metadata.filename.split('/')[-1] + '/'
integration = candint
dt = cd.state.dtarr[dtind]
inttime = cd.state.inttime
orig_max_freq = np.max(cd.state.metadata.freq_orig)
obs_max_freq = np.max(cd.state.freq)
delay_ints = calc_delay(freq=[obs_max_freq],
freqref=orig_max_freq,
dm=dm,
inttime=cd.state.inttime)[0]
i = segment * cd.state.readints + integration * cd.state.dtarr[
dtind] - delay_ints - 1
return i, name, dm
def dmshifts(self):
""" Calculate max DM delay in units of integrations for each dm trial.
Gets cached.
"""
if not hasattr(self, '_dmshifts'):
self._dmshifts = [util.calc_delay(self.freq, self.freq.max(), dm,
self.inttime).max()
for dm in self.dmarr]
return self._dmshifts
def dmshifts(self):
""" Calculate max DM delay in units of integrations for each dm trial.
Gets cached.
"""
if not hasattr(self, '_dmshifts'):
self._dmshifts = [
util.calc_delay(self.freq, self.freq.max(), dm,
self.inttime).max() for dm in self.dmarr
]
return self._dmshifts
def t_overlap(self):
""" Max DM delay in seconds that is fixed to int mult of integration time.
Gets cached. """
if not hasattr(self, '_t_overlap'):
from rfpipe import util
self._t_overlap = util.calc_delay(self.freq.take([0]),
self.freq.max(),
max(self.dmarr),
self.inttime)[0]*self.inttime
return self._t_overlap
def dmshifts(self):
""" Calculate max DM delay in units of integrations for each dm trial.
Gets cached.
"""
if not hasattr(self, '_dmshifts'):
from rfpipe import util
self._dmshifts = [util.calc_delay(self.freq.take([0]),
self.freq.max(),
dm, self.inttime)[0]
for dm in self.dmarr]
return self._dmshifts
def prepare_data(sdmfile,
gainfile,
delta_l,
delta_m,
segment=0,
dm=0,
dt=1,
spws=None):
"""
Applies Calibration, flagging, dedispersion and other data preparation steps
from rfpipe. Then phaseshifts the data to the location of the candidate.
"""
st = state.State(sdmfile=sdmfile,
sdmscan=1,
inprefs={
'gainfile': gainfile,
'workdir': '.',
'maxdm': 0,
'flaglist': []
},
showsummary=False)
if spws:
st.prefs.spw = spws
data = source.read_segment(st, segment)
takepol = [st.metadata.pols_orig.index(pol) for pol in st.pols]
takebls = [
st.metadata.blarr_orig.tolist().index(list(bl)) for bl in st.blarr
]
datap = np.require(data, requirements='W').take(takepol, axis=3).take(
st.chans, axis=2).take(takebls, axis=1)
datap = source.prep_standard(st, segment, datap)
datap = calibration.apply_telcal(st, datap)
datap = flagging.flag_data(st, datap)
delay = calc_delay(st.freq, st.freq.max(), dm, st.inttime)
data_dmdt = dedisperseresample(datap, delay, dt)
print(f'shape of data_dmdt is {data_dmdt.shape}')
uvw = get_uvw_segment(st, segment)
phase_shift(data_dmdt, uvw=uvw, dl=delta_l, dm=delta_m)
dataret = data_dmdt
return dataret, st
def pipeline_datacorrect(st, candloc, data_prep=None):
""" Prepare and correct for dm and dt sampling of a given candloc
Can optionally pass in prepared (flagged, calibrated) data, if available.
"""
if data_prep is None:
data_prep = pipeline_dataprep(st, candloc)
segment, candint, dmind, dtind, beamnum = candloc
dt = st.dtarr[dtind]
dm = st.dmarr[dmind]
scale = None
if hasattr(st, "rtpipe_version"):
scale = 4.2e-3 if st.rtpipe_version <= 1.54 else None
delay = util.calc_delay(st.freq, st.freq.max(), dm, st.inttime,
scale=scale)
data_dmdt = rfpipe.search.dedisperseresample(data_prep, delay, dt,
parallel=st.prefs.nthread > 1,
resamplefirst=st.fftmode=='cuda')
return data_dmdt
def dedisperse_search_cuda(st, segment, data, devicenum=None):
""" Run dedispersion, resample for all dm and dt.
Grid and image on GPU.
rfgpu is built from separate repo.
Uses state to define integrations to image based on segment, dm, and dt.
devicenum can force the gpu to use, but can be inferred via distributed.
"""
assert st.dtarr[0] == 1, "st.dtarr[0] assumed to be 1"
assert all([st.dtarr[dtind]*2 == st.dtarr[dtind+1]
for dtind in range(len(st.dtarr)-1)]), ("dtarr must increase "
"by factors of 2")
if not np.any(data):
logger.info("Data is all zeros. Skipping search.")
return candidates.CandCollection(prefs=st.prefs,
metadata=st.metadata)
if devicenum is None:
# assume first gpu, but try to infer from worker name
devicenum = 0
try:
from distributed import get_worker
name = get_worker().name
devicenum = int(name.split('g')[1])
logger.debug("Using name {0} to set GPU devicenum to {1}"
.format(name, devicenum))
except IndexError:
logger.warn("Could not parse worker name {0}. Using default GPU devicenum {1}"
.format(name, devicenum))
except ValueError:
logger.warn("No worker found. Using default GPU devicenum {0}"
.format(devicenum))
except ImportError:
logger.warn("distributed not available. Using default GPU devicenum {0}"
.format(devicenum))
rfgpu.cudaSetDevice(devicenum)
beamnum = 0
uvw = util.get_uvw_segment(st, segment)
upix = st.npixx
vpix = st.npixy//2 + 1
grid = rfgpu.Grid(st.nbl, st.nchan, st.readints, upix, vpix)
image = rfgpu.Image(st.npixx, st.npixy)
image.add_stat('rms')
image.add_stat('pix')
# Data buffers on GPU
vis_raw = rfgpu.GPUArrayComplex((st.nbl, st.nchan, st.readints))
vis_grid = rfgpu.GPUArrayComplex((upix, vpix))
img_grid = rfgpu.GPUArrayReal((st.npixx, st.npixy))
# Convert uv from lambda to us
u, v, w = uvw
u_us = 1e6*u[:, 0]/(1e9*st.freq[0])
v_us = 1e6*v[:, 0]/(1e9*st.freq[0])
# Q: set input units to be uv (lambda), freq in GHz?
grid.set_uv(u_us, v_us) # u, v in us
grid.set_freq(st.freq*1e3) # freq in MHz
grid.set_cell(st.uvres) # uv cell size in wavelengths (== 1/FoV(radians))
# Compute gridding transform
grid.compute()
# move Stokes I data in (assumes dual pol data)
vis_raw.data[:] = np.rollaxis(data.mean(axis=3), 0, 3)
vis_raw.h2d() # Send it to GPU memory
grid.conjugate(vis_raw)
# some prep if kalman filter is to be applied
if st.prefs.searchtype in ['imagek']:
# TODO: check that this is ok if pointing at bright source
spec_std = data.real.mean(axis=1).mean(axis=2).std(axis=0)
sig_ts, kalman_coeffs = kalman_prepare_coeffs(spec_std)
if not np.all(sig_ts):
logger.info("sig_ts all zeros. Skipping search.")
return candidates.CandCollection(prefs=st.prefs,
metadata=st.metadata)
# place to hold intermediate result lists
canddict = {}
canddict['candloc'] = []
for feat in st.features:
canddict[feat] = []
for dtind in range(len(st.dtarr)):
if dtind > 0:
grid.downsample(vis_raw)
for dmind in range(len(st.dmarr)):
delay = util.calc_delay(st.freq, st.freq.max(), st.dmarr[dmind],
st.inttime)
grid.set_shift(delay >> dtind) # dispersion shift per chan in samples
integrations = st.get_search_ints(segment, dmind, dtind)
if len(integrations) == 0:
continue
minint = min(integrations)
maxint = max(integrations)
logger.info('Imaging {0} ints ({1}-{2}) in seg {3} at DM/dt {4:.1f}/{5}'
' with image {6}x{7} (uvres {8}) with gpu {9}'
.format(len(integrations), minint, maxint, segment,
st.dmarr[dmind], st.dtarr[dtind], st.npixx,
st.npixy, st.uvres, devicenum))
for i in integrations:
# grid and FFT
grid.operate(vis_raw, vis_grid, i)
image.operate(vis_grid, img_grid)
# calc snr
stats = image.stats(img_grid)
if stats['rms'] != 0.:
snr1 = stats['max']/stats['rms']
else:
snr1 = 0.
logger.warn("rfgpu rms is 0 in int {0}. Skipping.".format(i))
# threshold image
if snr1 > st.prefs.sigma_image1:
candloc = (segment, i, dmind, dtind, beamnum)
xpeak = stats['xpeak']
ypeak = stats['ypeak']
l1, m1 = st.pixtolm((xpeak+st.npixx//2, ypeak+st.npixy//2))
if st.prefs.searchtype == 'image':
logger.info("Got one! SNR1 {0:.1f} candidate at {1} and (l, m) = ({2},{3})"
.format(snr1, candloc, l1, m1))
canddict['candloc'].append(candloc)
canddict['l1'].append(l1)
canddict['m1'].append(m1)
canddict['snr1'].append(snr1)
canddict['immax1'].append(stats['max'])
elif st.prefs.searchtype == 'imagek':
# TODO: implement phasing on GPU
data_corr = dedisperseresample(data, delay,
st.dtarr[dtind],
parallel=st.prefs.nthread > 1,
resamplefirst=st.fftmode=='cuda')
spec = data_corr.take([i], axis=0)
util.phase_shift(spec, uvw, l1, m1)
spec = spec[0].real.mean(axis=2).mean(axis=0)
# TODO: this significance can be biased low if averaging in long baselines that are not phased well
# TODO: spec should be calculated from baselines used to measure l,m?
significance_kalman = kalman_significance(spec,
spec_std,
sig_ts=sig_ts,
coeffs=kalman_coeffs)
snrk = (2*significance_kalman)**0.5
snrtot = (snrk**2 + snr1**2)**0.5
if snrtot > (st.prefs.sigma_kalman**2 + st.prefs.sigma_image1**2)**0.5:
logger.info("Got one! SNR1 {0:.1f} and SNRk {1:.1f} candidate at {2} and (l,m) = ({3},{4})"
.format(snr1, snrk, candloc, l1, m1))
canddict['candloc'].append(candloc)
canddict['l1'].append(l1)
canddict['m1'].append(m1)
canddict['snr1'].append(snr1)
canddict['immax1'].append(stats['max'])
canddict['snrk'].append(snrk)
elif st.prefs.searchtype == 'armkimage':
raise NotImplementedError
elif st.prefs.searchtype == 'armk':
raise NotImplementedError
else:
logger.warn("searchtype {0} not recognized"
.format(st.prefs.searchtype))
cc = candidates.make_candcollection(st, **canddict)
logger.info("First pass found {0} candidates in seg {1}."
.format(len(cc), segment))
if st.prefs.clustercands is not None:
cc = candidates.cluster_candidates(cc)
if st.prefs.savecands or st.prefs.saveplots:
# triggers optional plotting and saving
cc = reproduce_candcollection(cc, data)
candidates.save_cands(st, candcollection=cc)
return cc
def dedisperse_search_fftw(st, segment, data, wisdom=None):
""" Fuse the dediserpse, resample, search, threshold functions.
Returns list of CandData objects that define candidates with
candloc, image, and phased visibility data.
Integrations can define subset of all available in data to search.
Default will take integrations not searched in neighboring segments.
** only supports threshold > image max (no min)
** dmind, dtind, beamnum assumed to represent current state of data
"""
if not np.any(data):
logger.info("Data is all zeros. Skipping search.")
return candidates.CandCollection(prefs=st.prefs,
metadata=st.metadata)
# some prep if kalman filter is to be applied
if st.prefs.searchtype in ['imagek', 'armk', 'armkimage']:
# TODO: check that this is ok if pointing at bright source
spec_std = data.real.mean(axis=1).mean(axis=2).std(axis=0)
sig_ts, kalman_coeffs = kalman_prepare_coeffs(spec_std)
beamnum = 0
uvw = util.get_uvw_segment(st, segment)
# place to hold intermediate result lists
canddict = {}
canddict['candloc'] = []
for feat in st.features:
canddict[feat] = []
for dtind in range(len(st.dtarr)):
for dmind in range(len(st.dmarr)):
# set search integrations
integrations = st.get_search_ints(segment, dmind, dtind)
if len(integrations) == 0:
continue
minint = min(integrations)
maxint = max(integrations)
logger.info('{0} search of {1} ints ({2}-{3}) in seg {4} at DM/dt '
'{5:.1f}/{6} with image {7}x{8} (uvres {9}) with fftw'
.format(st.prefs.searchtype, len(integrations), minint,
maxint, segment, st.dmarr[dmind],
st.dtarr[dtind], st.npixx,
st.npixy, st.uvres))
# correct data
delay = util.calc_delay(st.freq, st.freq.max(), st.dmarr[dmind],
st.inttime)
data_corr = dedisperseresample(data, delay, st.dtarr[dtind],
parallel=st.prefs.nthread > 1,
resamplefirst=st.fftmode=='cuda')
# run search
if st.prefs.searchtype in ['image', 'imagek']:
images = grid_image(data_corr, uvw, st.npixx, st.npixy, st.uvres,
'fftw', st.prefs.nthread, wisdom=wisdom,
integrations=integrations)
for i, image in enumerate(images):
immax1 = image.max()
snr1 = immax1/image.std()
if snr1 > st.prefs.sigma_image1:
candloc = (segment, integrations[i], dmind, dtind, beamnum)
l1, m1 = st.pixtolm(np.where(image == immax1))
# if set, use sigma_kalman as second stage filter
if st.prefs.searchtype == 'imagek':
spec = data_corr.take([integrations[i]], axis=0)
util.phase_shift(spec, uvw, l1, m1)
spec = spec[0].real.mean(axis=2).mean(axis=0)
# TODO: this significance can be biased low if averaging in long baselines that are not phased well
# TODO: spec should be calculated from baselines used to measure l,m?
significance_kalman = kalman_significance(spec,
spec_std,
sig_ts=sig_ts,
coeffs=kalman_coeffs)
snrk = (2*significance_kalman)**0.5
snrtot = (snrk**2 + snr1**2)**0.5
if snrtot > (st.prefs.sigma_kalman**2 + st.prefs.sigma_image1**2)**0.5:
logger.info("Got one! SNR1 {0:.1f} and SNRk {1:.1f} candidate at {2} and (l,m) = ({3},{4})"
.format(snr1, snrk, candloc, l1, m1))
canddict['candloc'].append(candloc)
canddict['l1'].append(l1)
canddict['m1'].append(m1)
canddict['snr1'].append(snr1)
canddict['immax1'].append(immax1)
canddict['snrk'].append(snrk)
elif st.prefs.searchtype == 'image':
logger.info("Got one! SNR1 {0:.1f} candidate at {1} and (l, m) = ({2},{3})"
.format(snr1, candloc, l1, m1))
canddict['candloc'].append(candloc)
canddict['l1'].append(l1)
canddict['m1'].append(m1)
canddict['snr1'].append(snr1)
canddict['immax1'].append(immax1)
elif st.prefs.searchtype in ['armkimage', 'armk']:
armk_candidates = search_thresh_armk(st, data_corr, uvw,
integrations=integrations,
spec_std=spec_std,
sig_ts=sig_ts,
coeffs=kalman_coeffs)
for candind, snrarms, snrk, armloc, peakxy, lm in armk_candidates:
candloc = (segment, candind, dmind, dtind, beamnum)
# if set, use sigma_kalman as second stage filter
if st.prefs.searchtype == 'armkimage':
image = grid_image(data_corr, uvw, st.npixx_full,
st.npixy_full, st.uvres, 'fftw',
st.prefs.nthread,
wisdom=wisdom, integrations=candind)
peakx, peaky = np.where(image[0] == image[0].max())
l1, m1 = st.calclm(st.npixx_full, st.npixy_full,
st.uvres, peakx[0], peaky[0])
immax1 = image.max()
snr1 = immax1/image.std()
if snr1 > st.prefs.sigma_image1:
logger.info("Got one! SNRarms {0:.1f} and SNRk "
"{1:.1f} and SNR1 {2:.1f} candidate at"
" {3} and (l,m) = ({4},{5})"
.format(snrarms, snrk, snr1,
candloc, l1, m1))
canddict['candloc'].append(candloc)
canddict['l1'].append(l1)
canddict['m1'].append(m1)
canddict['snrarms'].append(snrarms)
canddict['snrk'].append(snrk)
canddict['snr1'].append(snr1)
canddict['immax1'].append(immax1)
elif st.prefs.searchtype == 'armk':
l1, m1 = lm
logger.info("Got one! SNRarms {0:.1f} and SNRk {1:.1f} "
"candidate at {2} and (l,m) = ({3},{4})"
.format(snrarms, snrk, candloc, l1, m1))
canddict['candloc'].append(candloc)
canddict['l1'].append(l1)
canddict['m1'].append(m1)
canddict['snrarms'].append(snrarms)
canddict['snrk'].append(snrk)
else:
raise NotImplemented("only searchtype=image, imagek, armk, armkimage implemented")
cc = candidates.make_candcollection(st, **canddict)
logger.info("First pass found {0} candidates in seg {1}."
.format(len(cc), segment))
if st.prefs.clustercands is not None:
cc = candidates.cluster_candidates(cc)
if st.prefs.savecands or st.prefs.saveplots:
# triggers optional plotting and saving
cc = reproduce_candcollection(cc, data)
candidates.save_cands(st, candcollection=cc)
return cc
def cd_refined_plot(cd, devicenum, nsubbands=4, mode='CPU', frbprob=None):
""" Use canddata object to create refinement plot of subbanded SNR and dm-time plot.
"""
import rfpipe.search
from rfpipe import util
from matplotlib import gridspec
import pylab as plt
import matplotlib
params = {
'axes.labelsize': 14,
'font.size': 9,
'legend.fontsize': 12,
'xtick.labelsize': 12,
'ytick.labelsize': 12,
'text.usetex': False,
'figure.figsize': [12, 10]
}
matplotlib.rcParams.update(params)
segment, candint, dmind, dtind, beamnum = cd.loc
st = cd.state
scanid = cd.state.metadata.scanId
width_m = st.dtarr[dtind]
timewindow = st.prefs.timewindow
tsamp = st.inttime * width_m
dm = st.dmarr[dmind]
ft_dedisp = np.flip((cd.data.real.sum(axis=2).T), axis=0)
chan_freqs = np.flip(st.freq * 1000, axis=0) # from high to low, MHz
nf, nt = np.shape(ft_dedisp)
candloc = cd.loc
logger.debug('Size of the FT array is ({0}, {1})'.format(nf, nt))
try:
assert nt > 0
except AssertionError as err:
logger.exception("Number of time bins is equal to 0")
raise err
try:
assert nf > 0
except AssertionError as err:
logger.exception("Number of frequency bins is equal to 0")
raise err
roll_to_center = nt // 2 - cd.integration_rel
ft_dedisp = np.roll(ft_dedisp, shift=roll_to_center, axis=1)
# If timewindow is not set during search, set it equal to the number of time bins of candidate
if nt != timewindow:
logger.info('Setting timewindow equal to nt = {0}'.format(nt))
timewindow = nt
else:
logger.info('Timewindow length is {0}'.format(timewindow))
try:
assert nf == len(chan_freqs)
except AssertionError as err:
logger.exception(
"Number of frequency channel in data should match the frequency list"
)
raise err
if dm is not 0:
dm_start = 0
dm_end = 2 * dm
else:
dm_start = -10
dm_end = 10
logger.info(
'Generating DM-time for candid {0} in DM range {1:.2f}--{2:.2f} pc/cm3'
.format(cd.candid, dm_start, dm_end))
logger.info("Using gpu devicenum: {0}".format(devicenum))
os.environ['CUDA_VISIBLE_DEVICES'] = str(devicenum)
dmt = rfpipe.search.make_dmt(ft_dedisp,
dm_start - dm,
dm_end - dm,
256,
chan_freqs / 1000,
tsamp,
mode=mode,
devicenum=int(devicenum))
delay = util.calc_delay(chan_freqs / 1000,
chan_freqs.max() / 1000, -1 * dm, tsamp)
dispersed = rfpipe.search.dedisperse_roll(ft_dedisp, delay)
# dispersed = disperse(ft_dedisp, -1*dm, chan_freqs/1000, tsamp)
im = cd.image
imstd = im.std() # consistent with rfgpu
snrim = np.round(im.max() / imstd, 2)
snrk = np.round(cd.snrk, 2)
l1, m1 = st.pixtolm(np.where(im == im.max()))
subsnrs, subts, bands = calc_subband_info(ft_dedisp, chan_freqs, nsubbands)
logging.info(f'Generating time series of full band')
ts_full = ft_dedisp.sum(0)
logging.info(f'Calculating SNR of full band')
snr_full = calc_snr(ts_full)
to_print = []
logging.info(f'{scanid}')
to_print.append(f"{'.'.join(scanid.split('.')[:3])}. \n")
to_print.append(f"{'.'.join(scanid.split('.')[3:])}\n")
logging.info(f'candloc: {candloc}, DM: {dm:.2f}')
to_print.append(f'candloc: {candloc}, DM: {dm:.2f}\n')
logging.info(f'Source: {st.metadata.source}')
to_print.append(f'Source: {st.metadata.source}\n')
logging.info(f'Subbanded SNRs are:')
to_print.append(f'Subbanded SNRs are:\n')
for i in range(nsubbands):
logging.info(
f'Band: {chan_freqs[bands[i][0]]:.2f}-{chan_freqs[bands[i][1]-1]:.2f}, SNR: {subsnrs[i]:.2f}'
)
to_print.append(
f'Band: {chan_freqs[bands[i][0]]:.2f}-{chan_freqs[bands[i][1]-1]:.2f}, SNR: {subsnrs[i]:.2f}\n'
)
logging.info(f'SNR of full band is: {snr_full:.2f}')
to_print.append(f'SNR of full band is: {snr_full:.2f}\n')
logging.info(f'SNR (im/k): {snrim}/{snrk}')
to_print.append(f'SNR (im/k): {snrim}/{snrk}\n')
logging.info(f'Clustersize: {cd.clustersize}')
to_print.append(f'Clustersize: {cd.clustersize}\n')
if frbprob is not None:
logging.info(f'frbprob: {frbprob}')
to_print.append(f'frbprob: {np.round(frbprob, 4)}\n')
str_print = ''.join(to_print)
fov = np.degrees(1. / st.uvres) * 60.
l1arcm = np.degrees(l1) * 60
m1arcm = np.degrees(m1) * 60
ts = np.arange(timewindow) * tsamp
gs = gridspec.GridSpec(4,
3,
width_ratios=[3.5, 0.1, 3],
height_ratios=[1, 1, 1, 1],
wspace=0.05,
hspace=0.20)
ax1 = plt.subplot(gs[0, 0])
ax2 = plt.subplot(gs[1, 0])
ax3 = plt.subplot(gs[2, 0])
ax4 = plt.subplot(gs[3, 0])
ax11 = plt.subplot(gs[0, 1])
ax22 = plt.subplot(gs[1, 1])
ax33 = plt.subplot(gs[2, 1])
ax44 = plt.subplot(gs[3, 1])
ax5 = plt.subplot(gs[0, 2:3])
ax6 = plt.subplot(gs[2:4, 2])
ax7 = plt.subplot(gs[1, 2])
x_loc = 0.1
y_loc = 0.5
for i in range(nsubbands):
ax1.plot(
ts,
subts[i] - subts[i].mean(),
label=
f'Band: {chan_freqs[bands[i][0]]:.0f}-{chan_freqs[bands[i][1]-1]:.0f}'
)
ax1.plot(ts, subts.sum(0) - subts.sum(0).mean(), 'k.', label='Full Band')
ax1.legend(loc='upper center',
bbox_to_anchor=(0.5, 1.45),
ncol=3,
fancybox=True,
shadow=True,
fontsize=11)
ax1.set_ylabel('Flux (Arb. units)')
ax1.set_xlim(np.min(ts), np.max(ts))
ax11.text(x_loc,
y_loc,
'Time Series',
fontsize=14,
ha='center',
va='center',
wrap=True,
rotation=-90)
ax11.axis('off')
ax2.imshow(ft_dedisp,
aspect='auto',
extent=[ts[0], ts[-1],
np.min(chan_freqs),
np.max(chan_freqs)])
ax2.set_ylabel('Freq')
ax22.text(x_loc,
y_loc,
'Dedispersed FT',
fontsize=14,
ha='center',
va='center',
wrap=True,
rotation=-90)
ax22.axis('off')
ax3.imshow(dispersed,
aspect='auto',
extent=[ts[0], ts[-1],
np.min(chan_freqs),
np.max(chan_freqs)])
ax3.set_ylabel('Freq')
ax33.text(x_loc,
y_loc,
'Original dispersed FT',
fontsize=14,
ha='center',
va='center',
wrap=True,
rotation=-90)
ax33.axis('off')
ax4.imshow(np.flip(dmt, axis=0),
aspect='auto',
extent=[ts[0], ts[-1], dm_start, dm_end])
ax4.set_xlabel('Time (s)')
ax4.set_ylabel('DM')
ax44.text(x_loc,
y_loc,
'DM-Time',
fontsize=14,
ha='center',
va='center',
wrap=True,
rotation=-90)
ax44.axis('off')
# ax5.text(0.02, 0.8, str_print, fontsize=14, ha='left', va='top', wrap=True)
ax5.text(0.02,
1.4,
str_print,
fontsize=11.5,
ha='left',
va='top',
wrap=True)
ax5.axis('off')
_ = ax6.imshow(im.transpose(),
aspect='equal',
origin='upper',
interpolation='nearest',
extent=[fov / 2, -fov / 2, -fov / 2, fov / 2],
cmap=plt.get_cmap('viridis'),
vmin=0,
vmax=0.5 * im.max())
ax6.set_xlabel('RA Offset (arcmin)')
ax6.set_ylabel('Dec Offset (arcmin)', rotation=-90, labelpad=12)
ax6.yaxis.tick_right()
ax6.yaxis.set_label_position("right")
# to set scale when we plot the triangles that label the location
ax6.autoscale(False)
# add markers on the axes at measured position of the candidate
ax6.scatter(x=[l1arcm],
y=[-fov / 2],
c='#ffff00',
s=60,
marker='^',
clip_on=False)
ax6.scatter(x=[fov / 2],
y=[m1arcm],
c='#ffff00',
s=60,
marker='>',
clip_on=False)
# makes it so the axis does not intersect the location triangles
ax6.set_frame_on(False)
sbeam = np.mean(st.beamsize_deg) * 60
# figure out the location to center the zoomed image on
xratio = len(im[0]) / fov # pix/arcmin
yratio = len(im) / fov # pix/arcmin
mult = 5 # sets how many times the synthesized beam the zoomed FOV is
xmin = max(0, int(len(im[0]) // 2 - (m1arcm + sbeam * mult) * xratio))
xmax = int(len(im[0]) // 2 - (m1arcm - sbeam * mult) * xratio)
ymin = max(0, int(len(im) // 2 - (l1arcm + sbeam * mult) * yratio))
ymax = int(len(im) // 2 - (l1arcm - sbeam * mult) * yratio)
left, width = 0.231, 0.15
bottom, height = 0.465, 0.15
# rect_imcrop = [left, bottom, width, height]
# ax_imcrop = fig.add_axes(rect_imcrop)
# logger.debug('{0}'.format(im.transpose()[xmin:xmax, ymin:ymax].shape))
# logger.debug('{0} {1} {2} {3}'.format(xmin, xmax, ymin, ymax))
_ = ax7.imshow(im.transpose()[xmin:xmax, ymin:ymax],
aspect=1,
origin='upper',
interpolation='nearest',
extent=[-1, 1, -1, 1],
cmap=plt.get_cmap('viridis'),
vmin=0,
vmax=0.5 * im.max())
# setup the axes
ax7.set_ylabel('Dec (arcmin)')
ax7.set_xlabel('RA (arcmin)')
ax7.xaxis.set_label_position('top')
# ax7.xaxis.tick_top()
ax7.yaxis.tick_right()
# ax7.yaxis.set_label_position("right")
xlabels = [
str(np.round(l1arcm + sbeam * mult / 2, 1)), '',
str(np.round(l1arcm, 1)), '',
str(np.round(l1arcm - sbeam * mult / 2, 1))
]
ylabels = [
str(np.round(m1arcm - sbeam * mult / 2, 1)), '',
str(np.round(m1arcm, 1)), '',
str(np.round(m1arcm + sbeam * mult / 2, 1))
]
ax7.set_xticklabels(xlabels)
ax7.set_yticklabels(ylabels)
# change axis label loc of inset to avoid the full picture
ax7.get_yticklabels()[0].set_verticalalignment('bottom')
plt.tight_layout()
plt.savefig(os.path.join(
cd.state.prefs.workdir,
'cands_{0}_refined.png'.format(cd.state.metadata.scanId)),
bbox_inches='tight')
def disperse(data, dm, freqs, inttime):
from rfpipe import util
from rfpipe.search import dedisperse_roll
delay = util.calc_delay(freqs, freqs.max(), dm, inttime)
return dedisperse_roll(data, delay)
