ASTROSAT CZTI

Data Quality Report

Orbit 51685

Creation date: 2025-04-22T12:01:10.595244
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/AS1A13_031T01_9000006462_51685cztM0_level2.fits modeM0/AS1A13_031T01_9000006462_51685cztM0_level2_quad_clean.evt
Size (bytes)505,105,92099,167,040
Size481.7 MB 94.6 MB
Events in quadrant A3,769,254651,322
Events in quadrant B4,215,708708,378
Events in quadrant C5,929,958583,888
Events in quadrant D4,250,675581,894

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0130
C0130
D0130

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0156452
B0171262
C0224212
D0174183

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01400
B01400
C01400
D01400

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A68462093.052878%
B68462733.987730%
C684682212.007011%
D68452904.236669%

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 7881 6847 57 57 0.72% 0.83%
B 7881 6847 95 95 1.21% 1.39%
C 7881 6847 681 681 8.64% 9.95%
D 7880 6846 184 184 2.34% 2.69%

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 159211 864.23 751 736 183.4
A 8 47 93260 504.57 751 736 183.4
A 8 63 85889 464.38 751 736 183.4
B 10 44 478763 3019.03 741 715 158.3
B 12 32 163972 1031.02 741 715 158.3
B 0 171 112864 708.26 741 715 158.3
C 15 189 1027932 5499.48 695 691 186.8
C 12 254 518442 2771.85 695 691 186.8
C 0 192 449244 2401.39 695 691 186.8
D 15 94 435564 2174.47 719 693 200.0
D 6 42 308278 1538.01 719 693 200.0
D 10 172 288347 1438.35 719 693 200.0

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