ASTROSAT CZTI

Data Quality Report

Orbit 51955

Creation date: 2025-05-06T22:33:38.297366
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/AS1C09_011T06_9000006468_51955cztM0_level2.fits modeM0/AS1C09_011T06_9000006468_51955cztM0_level2_quad_clean.evt
Size (bytes)766,414,08079,646,400
Size730.9 MB 76.0 MB
Events in quadrant A6,733,743498,126
Events in quadrant B3,960,092636,188
Events in quadrant C10,369,231346,810
Events in quadrant D6,809,270481,442

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0243531
B0162962
C0352531
D0247291

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6432122218.998756%
B64322073.218284%
C6432293645.646766%
D643292014.303483%

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 7307 6432 855 855 11.70% 13.29%
B 7307 6433 87 87 1.19% 1.35%
C 7307 6432 2225 2225 30.45% 34.59%
D 7307 6433 795 795 10.88% 12.36%

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 4 159 1263017 8164.89 615 599 154.6
A 7 174 745278 4816.33 615 599 154.6
A 7 64 692510 4475.04 615 599 154.6
B 7 252 147198 1025.66 665 642 142.9
B 4 170 129201 899.71 665 642 142.9
B 10 247 126658 881.91 665 642 142.9
C 15 224 6282272 44843.69 500 496 140.1
C 4 5 816567 5825.68 500 496 140.1
C 14 245 402382 2868.94 500 496 140.1
D 6 42 1090364 6319.14 615 588 172.5
D 2 172 829240 4805.0 615 588 172.5
D 12 16 614295 3558.62 615 588 172.5

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