ASTROSAT CZTI

Data Quality Report

Orbit 55779

Creation date: 2026-01-20T10:20:18.691323
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_099T04_9000006540_55779cztM0_level2.fits modeM0/AS1A14_099T04_9000006540_55779cztM0_level2_quad_clean.evt
Size (bytes)699,367,68089,190,720
Size667.0 MB 85.1 MB
Events in quadrant A8,729,344552,590
Events in quadrant B3,285,327702,390
Events in quadrant C2,958,605631,891
Events in quadrant D10,403,926353,798

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0305602
B0139442
C0137772
D0354972

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160
B0170
C0170
D0170

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6594132120.033364%
B6594210.318471%
C6594190.288141%
D6594289043.827722%

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 7804 6594 1237 1237 15.85% 18.76%
B 7804 6595 2 2 0.03% 0.03%
C 7804 6595 16 16 0.21% 0.24%
D 7804 6594 2789 2789 35.74% 42.30%

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 4583735 27998.02 664 648 163.7
A 15 32 736741 4496.78 664 648 163.7
A 12 115 248532 1514.32 664 648 163.7
B 5 172 416574 2745.21 704 676 151.5
B 0 199 28080 180.89 704 676 151.5
B 12 111 18243 115.95 704 676 151.5
C 9 38 58177 297.93 699 691 192.9
C 6 223 49654 253.76 699 691 192.9
C 14 96 30501 154.49 699 691 192.9
D 11 129 7156061 47796.51 522 497 149.7
D 7 70 478664 3193.98 522 497 149.7
D 8 245 274676 1831.41 522 497 149.7

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