ASTROSAT CZTI

Data Quality Report

Orbit 58661

Creation date: 2026-08-01T05:15:30.126471
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/AS1A14_004T06_9000006594_58661cztM0_level2.fits modeM0/AS1A14_004T06_9000006594_58661cztM0_level2_quad_clean.evt
Size (bytes)671,011,20092,024,640
Size639.9 MB 87.8 MB
Events in quadrant A4,257,118637,526
Events in quadrant B3,826,088694,090
Events in quadrant C4,632,019623,208
Events in quadrant D11,584,947348,538

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A017639132
B016470115
C018927117
D039764594

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01402
B01402
C01400
D01402

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0121
B0122
C0121
D0123

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A69463885.585949%
B69462743.944716%
C69473965.700302%
D6909316345.780866%

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 7661 6977 331 331 4.32% 4.74%
B 7661 6982 147 147 1.92% 2.11%
C 7661 6979 317 317 4.14% 4.54%
D 7660 6936 3110 3110 40.60% 44.84%

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 10 251 737138 4045.2 735 716 182.0
A 4 249 267506 1465.49 735 716 182.0
A 10 17 219181 1200.04 735 716 182.0
B 5 185 645597 4129.62 733 708 156.2
B 10 247 61828 391.39 733 708 156.2
B 0 157 36557 229.56 733 708 156.2
C 15 147 594363 2957.51 725 717 200.7
C 12 254 461009 2293.15 725 717 200.7
C 15 217 246911 1226.52 725 717 200.7
D 11 129 7063891 44634.38 551 525 158.2
D 8 160 849197 5362.88 551 525 158.2
D 8 240 786416 4966.15 551 525 158.2

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