ASTROSAT CZTI

Data Quality Report

Orbit 20180629_T02_054T01_9000002200_level2

Creation date: 2025-11-23T05:27:11.930649
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

Source files: Data quality report (detailed, human readable) | Data quality report (concise, machine readable)

Observation information


Basic statistics of files

Param Original file Final file
FilenamemodeM0/AS1T02_054T01_9000002200cztM0_level2.fits modeM0/AS1T02_054T01_9000002200cztM0_level2_quad_clean.evt
Size (bytes)861,523,200895,786,560
Size821.6 MB 854.3 MB
Events in quadrant A5,376,1105,672,140
Events in quadrant B4,945,5305,277,365
Events in quadrant C5,251,3925,410,065
Events in quadrant D4,414,8704,671,850

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A018100
B018100
C018100
D018100

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01540
B01540
C01540
D01540

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01861540
B02246470
C01855050
D02590710

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A889729121.025042%
B8897251035.735512%
C889726410.720451%
D8897281399.147822%

Noise dominated fraction

Noise dominated data is calculated using 1-second bins in cleaned event files. If a bin has >2000 counts, and if more than 50% of those come from <1% of pixels, then it is considered to be noise-dominated and hence unusable.

Quadrant # 1 sec bins Bins with >0 counts Bins with >2000 counts High rate bins dominated by noise Noise dominated (total time) Noise dominated (detector-on time) Marked lightcurve
A 103896 88971 0 0 0.00% 0.00%
B 103896 88833 0 0 0.00% 0.00%
C 103896 88972 0 0 0.00% 0.00%
D 103896 88741 0 0 0.00% 0.00%

Top noisy pixels

Top three noisy pixels from each quadrant. If the there are fewer than three noisy pixels in the level2.evt file, extra rows are filled as -1

Pixel properties Quadrant properties
Quadrant DetID PixID Counts Sigma Mean Median Sigma
A 0 29 5155 11.23 1402 1321 341.4
A 7 110 4168 8.34 1402 1321 341.4
A 9 19 4079 8.08 1402 1321 341.4
B 2 9 4303 12.18 1310 1259 250.0
B 5 128 3276 8.07 1310 1259 250.0
B 3 17 3272 8.05 1310 1259 250.0
C 12 241 3725 6.88 1388 1301 352.1
C 3 126 3541 6.36 1388 1301 352.1
C 2 191 3514 6.29 1388 1301 352.1
D 6 231 3165 6.05 1260 1154 332.4
D 10 189 3081 5.8 1260 1154 332.4
D 7 3 3081 5.8 1260 1154 332.4

Detector plane histogram (DPH)

Histogram calculated using DETX and DETY for each event in the final _common_clean file

Quadrant A Quadrant B
Quadrant D Quadrant C

Count rate plots and images

Plot type Count rate plots Images
Comparison with Poisson distribution
Blue bars denote a histogram of data divided into 1 sec bins.
Red curve is a Poisson curve with rate = median count rate of data.
Quadrant-wise count rates
Data is divided into 100 sec bins
Module-wise count rates for Quadrant A
Data is divided into 100 sec bins
Module-wise count rates for Quadrant B
Data is divided into 100 sec bins
Module-wise count rates for Quadrant C
Data is divided into 100 sec bins
Module-wise count rates for Quadrant D
Data is divided into 100 sec bins

Housekeeping plots

Parameter Plot
CZT HV Monitor
D_VDD
Temperature 1
Veto HV Monitor
Veto LLD
Alpha Counter
_CPM_Rate
CZT Counter
+2.5 Volts monitor
+5 Volts monitor
_ROLL_ROT
_Roll_DEC
_Roll_RA
Veto Counter