ASTROSAT CZTI

Data Quality Report

Orbit 57991

Creation date: 2026-06-17T03:09:54.310257
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_031T01_9000006584_57991cztM0_level2.fits modeM0/AS1A14_031T01_9000006584_57991cztM0_level2_quad_clean.evt
Size (bytes)582,782,40094,403,520
Size555.8 MB 90.0 MB
Events in quadrant A4,978,788625,565
Events in quadrant B6,582,101623,852
Events in quadrant C5,413,569576,746
Events in quadrant D4,086,395572,098

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160
B0170
C0170
D0170

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0193472
B0241663
C0207732
D0166342

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A66064026.085377%
B660594714.337623%
C66054647.024981%
D66051101.665405%

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 7677 6609 295 295 3.84% 4.46%
B 7676 6608 700 700 9.12% 10.59%
C 7676 6608 488 488 6.36% 7.38%
D 7676 6608 141 141 1.84% 2.13%

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 2103564 11897.57 713 696 176.7
A 3 14 42071 234.09 713 696 176.7
A 4 238 21219 116.11 713 696 176.7
B 10 128 3408766 22810.87 690 665 149.4
B 5 248 76173 505.38 690 665 149.4
B 4 236 72775 482.64 690 665 149.4
C 15 201 2247142 11988.82 681 673 187.4
C 15 224 421178 2244.13 681 673 187.4
C 12 252 37650 197.34 681 673 187.4
D 12 110 503374 2545.76 692 661 197.5
D 8 240 320770 1621.05 692 661 197.5
D 2 31 188761 952.55 692 661 197.5

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