ASTROSAT CZTI

Data Quality Report

Orbit 55920

Creation date: 2026-01-30T22:57:57.726105
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_030T02_9000006544_55920cztM0_level2.fits modeM0/AS1A14_030T02_9000006544_55920cztM0_level2_quad_clean.evt
Size (bytes)1,569,286,080359,268,480
Size1.5 GB 342.6 MB
Events in quadrant A13,082,9062,313,342
Events in quadrant B12,605,2742,512,035
Events in quadrant C13,390,9172,220,362
Events in quadrant D17,027,4912,069,012

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05200
B05200
C05200
D05200

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0576994
B0555153
C0594513
D0688113

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A256126862.678432%
B256134851.893570%
C256137142.787647%
D2561312144.739781%

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 26767 25613 299 299 1.12% 1.17%
B 26768 25614 15 15 0.06% 0.06%
C 26768 25614 476 476 1.78% 1.86%
D 26768 25614 1022 1022 3.82% 3.99%

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 4 249 1471708 2227.03 2688 2612 659.7
A 7 64 573494 865.41 2688 2612 659.7
A 0 8 132007 196.15 2688 2612 659.7
B 7 0 1329538 2339.91 2664 2558 567.1
B 2 249 199400 347.1 2664 2558 567.1
B 5 185 113902 196.34 2664 2558 567.1
C 15 199 1117928 1570.96 2612 2586 710.0
C 12 252 956584 1343.71 2612 2586 710.0
C 13 3 683969 959.73 2612 2586 710.0
D 11 129 5322190 7400.76 2591 2482 718.8
D 3 12 416671 576.22 2591 2482 718.8
D 2 31 329723 455.26 2591 2482 718.8

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