ASTROSAT CZTI

Data Quality Report

Orbit 53256

Creation date: 2025-08-02T12:12:04.751064
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_011T08_9000006492_53256cztM0_level2.fits modeM0/AS1C09_011T08_9000006492_53256cztM0_level2_quad_clean.evt
Size (bytes)610,744,320108,527,040
Size582.5 MB 103.5 MB
Events in quadrant A4,278,829706,325
Events in quadrant B4,395,685772,266
Events in quadrant C8,480,071610,092
Events in quadrant D4,850,955657,686

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0186632
B0187652
C0307524
D0200332

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B0100
C0100
D0100

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01560
B01580
C01580
D01580

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A77633164.070591%
B77632583.323457%
C7762125116.116980%
D77622122.731255%

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 7898 7764 219 219 2.77% 2.82%
B 7898 7764 79 79 1.00% 1.02%
C 7897 7763 1050 1050 13.30% 13.53%
D 7897 7763 180 180 2.28% 2.32%

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 0 8 267716 1354.66 797 775 197.1
A 8 47 258156 1306.15 797 775 197.1
A 8 63 207962 1051.42 797 775 197.1
B 10 254 358851 2069.35 805 774 173.0
B 4 81 293691 1692.79 805 774 173.0
B 2 249 234695 1351.85 805 774 173.0
C 15 224 3435869 17070.1 732 726 201.2
C 10 22 959759 4765.68 732 726 201.2
C 13 3 354292 1756.96 732 726 201.2
D 6 42 424861 1916.05 779 743 221.4
D 10 172 346778 1563.29 779 743 221.4
D 1 0 260708 1174.45 779 743 221.4

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