# The dips are astrophysical, on star A or star B.

> Most likely: The dips are astrophysical, on star A or star B.

Source: https://mysteriesdept.com/mysteries/hd-139139-random-transiter/answers/ANS0D79S0VG5ZJW/the-dips-are-astrophysical-on-star-a-or-star-b  
Publisher: Mysteries Department  
Licence: CC BY 4.0 (credit Mysteries Department and link the page)  

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[Questions](https://mysteriesdept.com/questions)[HD 139139, the "Random Transiter"](https://mysteriesdept.com/mysteries/hd-139139-random-transiter)[Are the 28 dips real changes in starlight, or an instrumental effect?](https://mysteriesdept.com/mysteries/hd-139139-random-transiter/questions/QST0D79RZW80KRQ/are-the-28-dips-real-changes-in-starlight-or-an-instrumental)Answer

Answer · HD 139139, the "Random Transiter"

# The dips are astrophysical, on star A or star B.

The dips are astrophysical, on star A or star B.

**Most likely** Answers **1** questionPublished0

## Where it stands

**Most likely** Its test partly supported it: three pieces of evidence for, none against. It needs two reviews to be accepted.

## What it predicts

- The dips appear in independent reductions (K2SFF, EVEREST, Kepler pipeline).
- The flux centroid does not move during dips.
- Dips recur in later sensitive photometry of the pair.

## What would rule it out

- Later monitoring at sufficient precision, over several weeks, that finds no dips; or an identified detector or pointing effect that reproduces them.

## Evidence 3 for · none against

[Tests for rolling bands, centroid shifts, cross-talk and bad pixels find nothing; neighbouring stars do not…](https://mysteriesdept.com/mysteries/hd-139139-random-transiter/evidence/EVD0D79S13A3E7F/tests-for-rolling-bands-centroid-shifts-cross-talk-and-bad)

Supported

FOR

[The K2 dips stand out in two independent reductions under a symmetric null](https://mysteriesdept.com/mysteries/hd-139139-random-transiter/evidence/EVD0DD2G4SX1J8X/the-k2-dips-stand-out-in-two-independent-reductions-under-a)

Supported

FOR

[The dips were first seen in the Kepler pipeline light curve and analysed in the independent K2SFF reduction.](https://mysteriesdept.com/mysteries/hd-139139-random-transiter/evidence/EVD0D79S1B46GYE/the-dips-were-first-seen-in-the-kepler-pipeline-light-curve)

Supported

FOR

## Tested by 1 run

| Run | Measured | Result | Against | Decision | Date |
|---|---|---|---|---|---|
| Run | dips vs sign-flipped bumps at >=5.5 sigma; published dips recovered | {'EVEREST': [19, 4], 'K2SFF_all': [23, 12], 'K2SFF_ge1.5h': [21, 6], 'recovered_K2SFF': 22, 'recovered_EVEREST': 17} | Sign-flipped search with symmetric outlier handling | The detector recovers the published dips, and they exceed the null in both independent reductions. | |

## The questions it answers

[Are the 28 dips real changes in starlight, or an instrumental effect?](https://mysteriesdept.com/mysteries/hd-139139-random-transiter/questions/QST0D79RZW80KRQ/are-the-28-dips-real-changes-in-starlight-or-an-instrumental)

Most likelyThe dips are astrophysical, on star A or star B

## Cite it

```
Mysteries Department. (2026). The dips are astrophysical, on star A or star B. [Answer ANS0D79S0VG5ZJW]. https://mysteriesdept.com/r/ANS0D79S0VG5ZJW
```

Key

**ANS** 0D79S0VG5ZJW

Kind

Answer · hypothesis

Origin

Published

Version

1

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