ASTROSAT CZTI

Data Quality Report

Orbit 20171120_A04_198T01_9000001708_level2

Creation date: 2025-11-18T13:20:50.849254
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/AS1A04_198T01_9000001708cztM0_level2.fits modeM0/AS1A04_198T01_9000001708cztM0_level2_quad_clean.evt
Size (bytes)745,254,720722,376,000
Size710.7 MB 688.9 MB
Events in quadrant A4,361,4264,185,998
Events in quadrant B4,422,4284,360,909
Events in quadrant C4,583,2644,235,506
Events in quadrant D3,670,3943,570,023

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A016420
B016420
C016420
D016420

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02560430
B01918480
C01654780
D02466320

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01200
B01200
C01200
D01200

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A80571820010.177359%
B8057127203.375904%
C805716370.790607%
D80571990512.293505%

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 92532 80525 0 0 0.00% 0.00%
B 92532 80571 0 0 0.00% 0.00%
C 92532 80571 0 0 0.00% 0.00%
D 92532 80078 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 4201 10.96 1137 1061 286.6
A 7 110 3503 8.52 1137 1061 286.6
A 9 19 3331 7.92 1137 1061 286.6
B 2 9 3927 12.3 1166 1110 229.1
B 14 254 2916 7.88 1166 1110 229.1
B 3 17 2909 7.85 1166 1110 229.1
C 1 81 3368 7.15 1209 1125 313.6
C 1 80 3357 7.12 1209 1125 313.6
C 12 241 3209 6.64 1209 1125 313.6
D 3 14 2657 6.12 1045 948 279.2
D 6 231 2612 5.96 1045 948 279.2
D 10 189 2588 5.87 1045 948 279.2

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