ASTROSAT CZTI

Data Quality Report

Orbit 20220401_T05_020T01_9000005050_level2

Creation date: 2026-01-02T10:13:17.554118
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/AS1T05_020T01_9000005050cztM0_level2.fits modeM0/AS1T05_020T01_9000005050cztM0_level2_quad_clean.evt
Size (bytes)630,060,480581,757,120
Size600.9 MB 554.8 MB
Events in quadrant A4,152,6223,755,819
Events in quadrant B3,274,4562,809,227
Events in quadrant C3,963,3263,533,780
Events in quadrant D3,001,4602,845,822

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A013860
B013860
C013860
D013860

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01418560
B03294310
C01569660
D03288690

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02490
B02500
C02500
D02500

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A681301450.212828%
B681292321434.073596%
C6813010271.507412%
D681301690424.811390%

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 92153 68130 0 0 0.00% 0.00%
B 92152 68000 0 0 0.00% 0.00%
C 92153 68110 0 0 0.00% 0.00%
D 92153 68078 0 0 0.00% 0.00%

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 9 19 3338 8.76 1084 1021 264.6
A 7 110 3301 8.62 1084 1021 264.6
A 0 29 3256 8.45 1084 1021 264.6
B 2 9 2843 11.82 867 829 170.4
B 3 80 2454 9.54 867 829 170.4
B 2 8 2297 8.61 867 829 170.4
C 1 81 3331 8.86 1047 985 264.9
C 3 203 3218 8.43 1047 985 264.9
C 1 80 3215 8.42 1047 985 264.9
D 7 3 2231 6.36 861 790 226.5
D 10 113 2213 6.28 861 790 226.5
D 6 67 2204 6.24 861 790 226.5

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