From 397c08f136509c74a06624c632932a85d42dc249 Mon Sep 17 00:00:00 2001 From: Michael Coughlin Date: Fri, 28 May 2021 07:59:44 -0500 Subject: [PATCH] Add variable object examples (#45) * Add variable object examples * move to top * Add ZTF note * P's comments Co-authored-by: Michael Coughlin --- config.defaults.yaml | 3 ++ data/golden/variable.csv | 101 +++++++++++++++++++++++++++++++++++ doc/field_guide.md | 3 ++ doc/field_guide__variable.md | 28 ++++++++++ 4 files changed, 135 insertions(+) create mode 100644 data/golden/variable.csv create mode 100644 doc/field_guide__variable.md diff --git a/config.defaults.yaml b/config.defaults.yaml index 31ba2663..137a47d9 100644 --- a/config.defaults.yaml +++ b/config.defaults.yaml @@ -109,3 +109,6 @@ docs: srv: coordinates: [330.302266, 66.153712] title: Semi Regular Variable + variable: + coordinates: [102.5537728, 44.1032507] + title: Variable stars diff --git a/data/golden/variable.csv b/data/golden/variable.csv new file mode 100644 index 00000000..aa00bcfc --- /dev/null +++ b/data/golden/variable.csv @@ -0,0 +1,101 @@ +ra,dec +57.9824782,53.8566172 +272.8552844,29.9028479 +276.0800373,29.9130089 +270.9076755,32.8207757 +6.6232587,44.8902661 +88.8484305,17.7665888 +274.9804392,50.0227432 +279.4623777,5.3792669 +112.4469838,54.1337081 +33.9819935,11.9759933 +16.5643002,23.2924322 +326.0787391,15.4009298 +19.6074840,4.8920702 +248.0164666,41.2041730 +102.5537728,44.1032507 +350.1108488,71.4164038 +88.5357895,22.4679389 +113.7158213,36.4640723 +260.5569140,12.2028310 +278.9998832,34.3439561 +291.6982794,5.3138620 +132.4635729,65.4968393 +277.5469726,6.8291386 +263.5441489,20.9636872 +342.0288946,5.8401930 +259.4463383,42.2357124 +151.0066243,70.6970353 +42.9208691,56.0335366 +270.9325217,40.8178125 +95.4129739,17.5817843 +140.6521044,67.6475041 +82.6227589,3.7812146 +275.3830585,30.2711684 +103.2434455,39.0331787 +279.5248934,8.0705532 +344.7590387,70.8179196 +84.8615634,17.8506223 +344.4093490,39.0454022 +326.9854090,44.1398676 +338.0094677,68.7871665 +276.3742737,30.3997842 +25.0646869,-16.2072779 +59.3137721,31.7774890 +349.1938096,27.0052354 +357.9503999,68.2239293 +341.2083996,7.3046264 +60.5171346,57.3100571 +290.2217651,7.7805664 +352.2838135,65.7376913 +309.5955405,16.8060927 +257.2931895,54.4958702 +264.8876924,27.4473018 +116.0173301,46.2893633 +259.3263182,37.1889430 +49.9145370,23.9169322 +8.4872745,31.2495600 +279.0846263,5.5610030 +356.3157552,34.6547563 +74.4244033,30.6375267 +99.3546791,58.9144284 +271.7216894,46.0895649 +273.5778279,32.3548446 +346.3490306,30.1280238 +72.4955439,0.3428680 +345.1046670,9.1682576 +278.2820707,34.3379471 +84.8480701,15.6439576 +60.6687430,53.7304794 +76.1247317,7.9413842 +349.1060716,2.8716292 +342.1660508,70.8297184 +22.5118485,-18.2684943 +42.7964136,40.0399553 +280.2039891,6.8432717 +280.6672603,6.3569351 +339.0455462,9.2883291 +211.6122506,2.2164137 +271.6061131,32.6122139 +157.6706310,52.7562510 +258.7084809,23.4312928 +291.5640252,7.2827192 +358.3173929,21.9382502 +240.0094054,42.7404683 +286.4190610,2.9330652 +12.7044054,9.3831175 +327.1640906,24.8624178 +53.2096541,-4.9525825 +331.2187464,13.4220002 +317.7380278,3.7578827 +335.5817485,69.8251712 +300.0887723,17.7026361 +143.0583031,56.0040293 +111.3671256,51.3003786 +55.6386680,56.5948797 +264.7593972,15.4301584 +76.7603056,5.3752695 +150.7482685,45.4708706 +318.2052491,-6.8430796 +260.9267812,22.7642142 +279.1865127,6.9689025 diff --git a/doc/field_guide.md b/doc/field_guide.md index 560e68ab..4a5bb771 100644 --- a/doc/field_guide.md +++ b/doc/field_guide.md @@ -6,6 +6,9 @@ Proceed here to interactively inspect the ta tree we are employing in SCoPe. Please refer to [arXiv:2102.11304](https://arxiv.org/pdf/2102.11304.pdf) for more details on the taxonomy. +```{include} ./field_guide__variable.md +``` + ```{include} ./field_guide__periodic.md ``` diff --git a/doc/field_guide__variable.md b/doc/field_guide__variable.md new file mode 100644 index 00000000..c8452628 --- /dev/null +++ b/doc/field_guide__variable.md @@ -0,0 +1,28 @@ +## Variable stars (variable) +Variable stars are objects whose brightness is varying at a statistically significant level. +ZTF has statistical measurements depend on magnitude: down to ~10 millimagnitudes for bright stars and >0.1 mag for objects near the detection limit. +Many astrophysical objects exhibit variable behavior, including periodic variables such as eclipsing binaries, pulsators, etc, and non-periodic variables such as AGN and YSOs. + +### Classification and numbers +- Subtypes + - Irregular + - Flaring + - Periodic + - Dipping + - Long Time Scale + +### ZTF light curves +![ZTF variable](data/variable.png) + +#### Description +Most stars are likely to be variable at some level. Therefore, variable is defined to be those varying at a statistically varying level, with millimagnitude to magnitude level variations. + +#### Light curve characteristics +- amplitude: varies from survey precision to more than a magnitude + +![HR diagram of Variable](data/hr__variable.png) + +![RA/Dec diagram of Variable](data/radec__variable.png) + +### References and further reading: +- Jayasinghe et al., 2018, MNRAS 447 3, The ASAS-SN catalogue of variable stars I: The Serendipitous Survey [arxiv:1803.01001](https://arxiv.org/pdf/1803.01001.pdf)