ASTROSAT CZTI

Data Quality Report

Orbit 55757

Creation date: 2026-01-18T03:02:31.315987
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/AS1A14_099T04_9000006540_55757cztM0_level2.fits modeM0/AS1A14_099T04_9000006540_55757cztM0_level2_quad_clean.evt
Size (bytes)742,196,16095,474,880
Size707.8 MB 91.1 MB
Events in quadrant A11,024,418451,714
Events in quadrant B3,688,590736,441
Events in quadrant C3,935,731659,736
Events in quadrant D8,250,137526,179

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0378950
B0162460
C0169340
D0296660

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01500
B01500
C01500
D01500

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7415278837.599461%
B7416520.701187%
C7415821.105866%
D7415144519.487525%

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 7414 7414 2488 2488 33.56% 33.56%
B 7416 7416 0 0 0.00% 0.00%
C 7415 7415 54 54 0.73% 0.73%
D 7414 7414 1289 1289 17.39% 17.39%

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 15 32 7000137 45626.88 620 603 153.4
A 3 14 804974 5243.34 620 603 153.4
A 4 249 327822 2133.0 620 603 153.4
B 7 0 629694 3770.1 767 736 166.8
B 12 111 20366 117.67 767 736 166.8
B 11 111 19256 111.01 767 736 166.8
C 12 252 420974 2033.04 753 747 206.7
C 1 16 333131 1608.06 753 747 206.7
C 13 3 120159 577.71 753 747 206.7
D 11 129 4633573 23491.69 697 664 197.2
D 6 42 570426 2889.04 697 664 197.2
D 7 96 137205 692.35 697 664 197.2

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