ASTROSAT CZTI

Data Quality Report

Orbit 20190627_A05_117T01_9000003002_level2

Creation date: 2025-12-01T18:22:05.228320
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/AS1A05_117T01_9000003002cztM0_level2.fits modeM0/AS1A05_117T01_9000003002cztM0_level2_quad_clean.evt
Size (bytes)563,184,000546,871,680
Size537.1 MB 521.5 MB
Events in quadrant A3,457,8083,307,490
Events in quadrant B3,298,6783,290,980
Events in quadrant C3,381,8763,110,737
Events in quadrant D2,925,8182,862,406

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A011820
B011820
C011820
D011820

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0840
B0840
C0840
D0840

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01297780
B01318610
C01238020
D01556290

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5817615772.710740%
B5817615032.583540%
C581769391.614068%
D5817625334.354029%

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 65760 58122 0 0 0.00% 0.00%
B 65760 58169 0 0 0.00% 0.00%
C 65760 58174 0 0 0.00% 0.00%
D 65760 58065 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 0 29 3376 11.36 901 845 222.8
A 7 110 2850 9.0 901 845 222.8
A 0 30 2678 8.23 901 845 222.8
B 2 9 2695 10.65 872 830 175.2
B 2 8 2226 7.97 872 830 175.2
B 3 17 2198 7.81 872 830 175.2
C 12 241 2465 7.1 893 832 230.0
C 2 191 2287 6.33 893 832 230.0
C 12 249 2285 6.32 893 832 230.0
D 3 14 2099 5.96 837 763 224.2
D 7 3 2081 5.88 837 763 224.2
D 15 46 2052 5.75 837 763 224.2

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