ASTROSAT CZTI

Data Quality Report

Orbit 57774

Creation date: 2026-06-02T17:04:11.880515
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_083T16_9000006580_57774cztM0_level2.fits modeM0/AS1A14_083T16_9000006580_57774cztM0_level2_quad_clean.evt
Size (bytes)419,212,80087,877,440
Size399.8 MB 83.8 MB
Events in quadrant A3,419,588574,878
Events in quadrant B2,876,872624,440
Events in quadrant C5,235,867520,271
Events in quadrant D3,507,476514,486

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01180
B01184
C01184
D01184

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A014731234
B013131109
C020216451
D015180163

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A070
B070
C070
D070

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A61331993.244742%
B61691362.204571%
C61175148.402812%
D61492253.659132%

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 7466 6217 67 67 0.90% 1.08%
B 7466 6245 16 16 0.21% 0.26%
C 7466 6225 314 314 4.21% 5.04%
D 7466 6232 154 154 2.06% 2.47%

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 3 14 792109 4967.99 648 632 159.3
A 3 245 60923 378.44 648 632 159.3
A 3 128 28388 174.22 648 632 159.3
B 4 80 76903 556.98 649 624 137.0
B 10 247 47773 344.28 649 624 137.0
B 0 63 38730 278.25 649 624 137.0
C 9 38 1508585 9140.29 612 604 165.0
C 15 224 1065140 6452.44 612 604 165.0
C 14 254 98615 594.07 612 604 165.0
D 9 102 561689 3122.98 632 601 179.7
D 12 248 109576 606.55 632 601 179.7
D 2 153 101753 563.0 632 601 179.7

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