ASTROSAT CZTI

Data Quality Report

Orbit 55966

Creation date: 2026-02-06T01:29:43.342926
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_066T02_9000006546_55966cztM0_level2.fits modeM0/AS1A14_066T02_9000006546_55966cztM0_level2_quad_clean.evt
Size (bytes)389,096,64094,893,120
Size371.1 MB 90.5 MB
Events in quadrant A4,181,426618,720
Events in quadrant B3,131,737655,450
Events in quadrant C3,339,585579,710
Events in quadrant D3,238,071560,168

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0169251
B0141251
C0150611
D0143741

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6583811.230442%
B65841031.564399%
C65841352.050425%
D6583630.957010%

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 7493 6584 3 3 0.04% 0.05%
B 7494 6585 29 29 0.39% 0.44%
C 7494 6585 71 71 0.95% 1.08%
D 7493 6584 33 33 0.44% 0.50%

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 7 64 1256497 7245.98 699 682 173.3
A 4 3 40030 227.04 699 682 173.3
A 0 8 34819 196.97 699 682 173.3
B 2 249 178979 1211.51 688 662 147.2
B 0 199 64671 434.89 688 662 147.2
B 0 213 27278 180.83 688 662 147.2
C 15 230 205559 1108.65 671 665 184.8
C 14 254 154176 830.62 671 665 184.8
C 15 199 111716 600.88 671 665 184.8
D 2 31 140789 730.08 679 651 191.9
D 7 96 120161 622.62 679 651 191.9
D 7 129 71447 368.83 679 651 191.9

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