ASTROSAT CZTI

Data Quality Report

Orbit 51687

Creation date: 2025-04-23T14:16:52.822684
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_51687cztM0_level2.fits modeM0/AS1A13_031T01_9000006462_51687cztM0_level2_quad_clean.evt
Size (bytes)644,978,880103,769,280
Size615.1 MB 99.0 MB
Events in quadrant A4,275,448701,316
Events in quadrant B4,516,897749,184
Events in quadrant C9,170,313514,460
Events in quadrant D5,304,823633,366

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A060
B070
C070
D070

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0179022
B0187662
C0327742
D0211882

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01580
B01580
C01580
D01580

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A78194756.074946%
B78195897.532933%
C7819237330.349150%
D78195597.149252%

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 7934 7820 61 61 0.77% 0.78%
B 7934 7820 97 97 1.22% 1.24%
C 7934 7820 1688 1688 21.28% 21.59%
D 7934 7820 227 227 2.86% 2.90%

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 155629 729.36 879 857 212.2
A 5 240 146328 685.53 879 857 212.2
A 13 248 100030 467.35 879 857 212.2
B 10 254 195250 1054.25 861 831 184.4
B 5 185 167794 905.37 861 831 184.4
B 0 171 127283 685.69 861 831 184.4
C 15 189 4572522 22639.15 750 741 201.9
C 0 192 459323 2270.87 750 741 201.9
C 13 3 422488 2088.46 750 741 201.9
D 10 172 605873 2590.7 852 820 233.5
D 3 12 433591 1853.02 852 820 233.5
D 15 94 408580 1745.93 852 820 233.5

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