Hello,

I am working for Euclid and have the responsability of the lsst data processing within the Euclid infrastruture.

I was asked about the bit flags used in LSST, and saw that you are refering to **Mask Planes Number** whereas Euclid uses **Bit Mask Value** in their documentation.

I guessed that the correspondance between the two was as follow :

```
BIT_PLANE FLAGMAP_BIT BIT_VALUE
0 0x00000001 1 BAD
1 0x00000002 2 SAT
2 0x00000004 4 INTRP
3 0x00000008 8 CR
4 0x00000010 16 EDGE
5 0x00000020 32 DETECTED
6 0x00000040 64 DETECTED_NEGATIVE
7 0x00000080 128 SUSPECT
```

Can someone tell me if this is correct ?

Thank you for your help.

Rémi