mtl-dark-hp-HPX
- Summary:
MTL ledgers for the DESI dark-time program.
- Naming Convention:
mtl-dark-hp-HPX.ecsv
, where HPX is the nside=32 (NESTED) HEALPixel integer.- Regex:
mtl-dark-hp-[0-12287]\.ecsv
- File Type:
ecsv, 0-10 MB
Contents
EXTNAME |
Type |
Contents |
---|---|---|
MTL |
TABLE |
MTL Ledger |
Required Header Keywords
KEY |
Example Value |
Type |
Comment |
---|---|---|---|
DR |
9 |
int |
Legacy Surveys Data Release used to produce the targets (should always be 9) |
FILEHPX |
4447 |
int |
HEALPixel integer for the file |
FILENEST |
True |
bool |
If the HEALPixel NESTED scheme was used for the file (should always be True) |
FILENSID |
32 |
int |
HEALPixel nside used for the file (should always be 32) |
INDIR |
dr9/1.1.1/targets/main/resolve/dark |
str |
Location of the directory of targets used to produce the file |
OBSCON |
DARK |
str |
DESI program (DARK, BRIGHT or BACKUP) |
SCND |
False |
bool |
Whether the file is a ledger of primary or secondary targets |
SURVEY |
main |
str |
DESI survey phase (main, sv2 or sv3) |
TSFORCED |
2021-05-13T08:15:37+00:00 |
str |
UTC/ISO TIMESTAMP that was specified to produce initial ledgers |
Required Data Table Columns
Name |
Type |
Units |
Description |
---|---|---|---|
RA |
float64 |
deg |
Right ascension |
DEC |
float64 |
deg |
Declination |
REF_EPOCH |
float32 |
yr |
Reference epoch for Gaia/Tycho astrometry |
PARALLAX |
float32 |
mas |
Parallax |
PMRA |
float32 |
mas/yr |
Proper motion in the RA direction |
PMDEC |
float32 |
mas/yr |
Proper motion in the Dec direction |
TARGETID |
int64 |
Unique DESI targeting ID |
|
DESI_TARGET |
int64 |
DESI (dark time program) target selection bitmask |
|
BGS_TARGET |
int64 |
BGS (bright time program) target selection bitmask |
|
MWS_TARGET |
int64 |
MWS (bright time program) target selection bitmask |
|
SUBPRIORITY |
float64 |
Random subpriority [0-1] to break assignment ties |
|
OBSCONDITIONS |
int32 |
Observing conditions/program bitmask (bright/dark/backup/etc.) |
|
PRIORITY_INIT |
int64 |
Target’s initial priority from target selection bitmasks and OBSCONDITIONS |
|
NUMOBS_INIT |
int64 |
Target’s initial desired number of observations |
|
SCND_TARGET |
int64 |
Target selection bitmask for secondary programs |
|
NUMOBS_MORE |
int64 |
Desired number of observations given target’s current state |
|
NUMOBS |
int64 |
Number of (good) observations of target acquired so far |
|
Z |
float64 |
Redshift measured by Redrock |
|
ZWARN |
int64 |
Redshift warning bitmask measured by Redrock |
|
ZTILEID |
int32 |
ID of tile that most recently updated target’s state |
|
Z_QN |
float64 |
Redshift measured by QuasarNET |
|
IS_QSO_QN |
int16 |
Classification determined by QuasarNET (1=QSO) |
|
DELTACHI2 |
float64 |
Delta-chi-squared for template fit from Redrock |
|
TARGET_STATE |
char[18] |
Combination of target’s class and its current observational state |
|
TIMESTAMP |
char[25] |
s |
UTC/ISO time at which the target’s state was updated |
VERSION |
char[5] |
Version of desitarget code used to update target’s state |
|
PRIORITY |
int64 |
Target’s current priority |