ASTROSAT CZTI

Data Quality Report

Orbit 20170712_A02_198T01_9000001376_level2

Creation date: 2025-11-15T10:21:15.362264
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/AS1A02_198T01_9000001376cztM0_level2.fits modeM0/AS1A02_198T01_9000001376cztM0_level2_quad_clean.evt
Size (bytes)703,082,880736,041,600
Size670.5 MB 701.9 MB
Events in quadrant A4,255,9484,487,115
Events in quadrant B4,096,8384,443,758
Events in quadrant C4,210,4964,330,605
Events in quadrant D3,632,2543,934,283

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01210
B01200
C01200
D01210

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A015120
B015200
C015120
D015120

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01580470
B01569690
C01525730
D01838130

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A743479811.319488%
B743319131.228290%
C743135570.749532%
D7429224973.361062%

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 86973 74761 0 0 0.00% 0.00%
B 86973 74772 0 0 0.00% 0.00%
C 86973 74759 0 0 0.00% 0.00%
D 86973 74755 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 4055 10.93 1105 1034 276.3
A 7 110 3511 8.96 1105 1034 276.3
A 9 19 3186 7.79 1105 1034 276.3
B 2 9 3572 11.95 1082 1034 212.3
B 3 17 2747 8.07 1082 1034 212.3
B 12 226 2741 8.04 1082 1034 212.3
C 1 80 3096 7.14 1111 1032 289.2
C 1 81 3082 7.09 1111 1032 289.2
C 12 241 2960 6.67 1111 1032 289.2
D 3 14 2673 6.25 1034 941 277.2
D 6 231 2656 6.19 1034 941 277.2
D 10 189 2567 5.87 1034 941 277.2

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