PROTODESI_GFA
- Summary:
GFA images for ProtoDESI, including guider “postage stamps”. Should we also save full frame images?
- Naming Convention:
PROTODESI_GFA[01]G_roi_[0-9]{8}_[0-9]{4}\.fits.- Regex:
PROTODESI_GFA[01]G_roi_[0-9]{8}_[0-9]{4}\.fits- File Type:
FITS
Contents
Number |
EXTNAME |
Type |
Contents |
|---|---|---|---|
PRIMARY |
IMAGE |
Raw image |
|
GFA |
IMAGE |
Raw image |
FITS Header Units
HDU0
EXTNAME = PRIMARY
Empty HDU.
Required Header Keywords
Header |
Value |
Type |
Comment |
|---|---|---|---|
DEVICE |
‘GFA1G ‘ |
str |
|
OBSNUM |
1622 |
int |
|
OBSFRAME |
7 |
int |
|
OBSTYPE |
‘ROI ‘ |
str |
|
DATE-OBS |
‘2016-08-31T03:10:47.945228’ |
str |
|
TIME-OBS |
‘03:10:47.945228’ |
str |
|
MJD-OBS |
57631.13249937 |
float |
|
OPENSHUT |
‘2016-08-31T03:10:47.945228’ |
str |
|
LST |
‘18:23:19.990’ |
str |
|
EXPREQ |
float |
||
EXPTIME |
float |
||
FILENAME |
‘/data/images/gfa/PROTODESI_GFA1G_roi_00001622_0007.fits’ |
str |
|
ROI_LIST |
‘(190.51099891749917, 124.5090160850238)’ |
str |
|
CHECKSUM |
‘Y72la70kS70kY70k’ |
str |
HDU checksum updated 2016-08-31T03:10:47 |
DATASUM |
‘ 0’ |
str |
data unit checksum updated 2016-08-31T03:10:47 |
HDU1
EXTNAME = GFA
This is the actual GFA image, which got stored in an extension instead of the primary.
Header |
Value |
Type |
Comment |
|---|---|---|---|
BITPIX |
16 |
int |
number of bits per data pixel |
NAXIS |
2 |
int |
number of data axes |
NAXIS1 |
64 |
int |
length of data axis 1 |
NAXIS2 |
64 |
int |
length of data axis 2 |
PCOUNT |
0 |
int |
required keyword; must = 0 |
GCOUNT |
1 |
int |
required keyword; must = 1 |
BZERO |
32768 |
int |
offset data range to that of unsigned short |
BSCALE |
1 |
int |
default scaling factor |
ROI_X |
190.510998917499 |
float |
|
ROI_Y |
124.509016085024 |
float |
|
SHAPE |
‘64,64 ‘ |
str |
|
DTYPE |
‘uint16 ‘ |
str |
|
CHECKSUM |
‘EeRhFZQZEbQfEZQZ’ |
str |
HDU checksum updated 2016-08-31T03:10:47 |
DATASUM |
‘1260997802’ |
str |
data unit checksum updated 2016-08-31T03:10:47 |
Data: int16 FITS image [64, 64]