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A community tool for transiting exoplanet science with JWST & HST

License: GNU General Public License v3.0

Python 5.84% Jupyter Notebook 27.00% OpenEdge ABL 0.04% HTML 67.12%

astronomy simulator exoplanet-transits jwst hst

pandexo_hst's Introduction

PandExo_HST

PandExo: A community tool for transiting exoplanet science with JWST & HST

Similar to an exposure time calculator (ETC), PandExo is a transiting exoplanet noise simulator. It is based on Pandeia, the ETC for JWST, and has been expanded to include HST's WFC3 instrument.

The included Jupyter Notebook tutorial demonstrates how to use PandExo to:

1. Optimize WFC3's NSAMP and SAMP-SEQ parameters,
2. Predict transmission/emission spectrum uncertainties, and
3. Determine the observation start window

for any system observed with HST/WFC3 using the G102 & G141 grisms. The current implementation scales the measured flux, variance, and exposure time values from previously-observed systems, computes the expected rms per spectrophotometric channel, and estimates the transit/eclipse depth error based on the anticipated number of valid in- and out-of-transit data points. The uncertainty estimates depend on the orbital properties of the system, instrument configuration, and observation duration. The code assumes Gaussian-distributed white noise and uniform uncertainties over the G102 and G141 grisms; both assumptions are consistent with published results.

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iancrossfield exoctk exokamen exowanderer lkreidberg

pandexo_hst's Issues

Consider deprecating and archiving this package

This package appears to be deprecated and fully replaced by the one here: https://github.com/natashabatalha/PandExo, which is also referenced by pypi here: https://pypi.org/project/pandexo.engine/

We should review the package contents here, and then archive it so that future users are not confused and find the most recent package.

see also #10 (comment)

tagging @mfixstsci @nespinoza for review, suggestions, and general comments :)

Update the help

Tyler Desjardins mentions that we should consider moving emails from help[at]stsci.edu to point to the web portal where possible and appropriate. For HST (or any non-JWST), it is https://hsthelp.stsci.edu . For JWST, it is https://jwsthelp.stsci.edu . Please update info in setup.py, setup.cfg, documentation, etc as appropriate.

Please close this issue if it is irrelevant to your repository. This is an automated issue. If this is opened in error, please let pllim know!

xref spacetelescope/hstcal#317

HST_TExoNS installation

Unable to find HST_TExoNS. How to install it?

Units documentation

Are the units on exo_dict['planet']['depth'] the same as that supplied in exo_dict['planet']['f_unit']? (I believe the answer is no, and that f_unit provides the flux unit for the user-supplied model).

How is exo_dict['observation']['norbits'] used in the precision calculation? If N=4, is that three out-of-transit orbits and 1 in-transit orbit (as plotted in step 5)?

Model spectrum does not write to text file

Apologies! I didn't mean to hit enter.

INVALID INSTRUMENT NAME (missing json file?)

Following the example, when I enter:
hst.load_mode_dict('wfc3 g141')
I get the error "INVALID INSTRUMENT NAME." It looks like a file "wfc3_input.json" is being sought -- from where can one download this?

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