ASTROSAT CZTI

Data Quality Report

Orbit 20181016_A05_174T01_9000002440_level2

Creation date: 2025-11-25T06:38:01.357186
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_174T01_9000002440cztM0_level2.fits modeM0/AS1A05_174T01_9000002440cztM0_level2_quad_clean.evt
Size (bytes)1,674,109,4401,577,525,760
Size1.6 GB 1.5 GB
Events in quadrant A10,185,7269,332,246
Events in quadrant B9,885,6869,469,284
Events in quadrant C9,756,3968,562,640
Events in quadrant D8,708,5388,254,076

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02740
B02740
C02740
D02740

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A036200
B036200
C036200
D036200

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03872120
B03785560
C04853990
D03908400

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A17748929451.659258%
B17749029551.664883%
C177488125357.062449%
D17749031571.778692%

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 204635 177456 0 0 0.00% 0.00%
B 204635 177448 0 0 0.00% 0.00%
C 204635 177452 0 0 0.00% 0.00%
D 204635 177437 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 9729 11.13 2643 2468 652.2
A 7 110 8237 8.85 2643 2468 652.2
A 0 30 7797 8.17 2643 2468 652.2
B 2 9 8107 10.99 2609 2479 512.1
B 2 8 6800 8.44 2609 2479 512.1
B 3 17 6599 8.04 2609 2479 512.1
C 1 80 7256 7.26 2577 2389 670.5
C 1 81 7166 7.12 2577 2389 670.5
C 12 241 7039 6.93 2577 2389 670.5
D 3 14 6444 6.33 2485 2252 662.3
D 6 231 6352 6.19 2485 2252 662.3
D 3 31 6163 5.91 2485 2252 662.3

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