ASTROSAT CZTI

Data Quality Report

Orbit 52274

Creation date: 2025-07-21T22:02:24.294438
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/AS1C09_011T05_9000006474_52274cztM0_level2.fits modeM0/AS1C09_011T05_9000006474_52274cztM0_level2_quad_clean.evt
Size (bytes)1,267,050,24091,512,000
Size1.2 GB 87.3 MB
Events in quadrant A4,526,171818,187
Events in quadrant B9,253,019829,301
Events in quadrant C19,375,43127,537
Events in quadrant D13,071,833488,542

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0196662
B0336102
C0635604
D0449482

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01780
B01780
C01780
D01780

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0150
B0150
C0150
D0150

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8740550.629291%
B87407949.084668%
C8740850997.356979%
D8740325537.242563%

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 10220 8742 36 36 0.35% 0.41%
B 10220 8742 527 527 5.16% 6.03%
C 10220 8740 6586 6586 64.44% 75.35%
D 10220 8741 2346 2346 22.95% 26.84%

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 11 3 170404 742.88 926 904 228.2
A 5 240 127224 553.63 926 904 228.2
A 10 253 106405 462.38 926 904 228.2
B 10 254 3864117 20325.61 898 867 190.1
B 4 171 526626 2766.16 898 867 190.1
B 4 81 263607 1382.35 898 867 190.1
C 15 178 9324086 116621.87 284 282 79.9
C 15 158 6215109 77734.88 284 282 79.9
C 15 224 1691599 21154.94 284 282 79.9
D 12 18 3703062 17952.37 716 681 206.2
D 15 93 2729584 13232.1 716 681 206.2
D 7 60 2092180 10141.41 716 681 206.2

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