ASTROSAT CZTI

Data Quality Report

Orbit 55691

Creation date: 2026-01-13T12:25:37.823855
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_55691cztM0_level2.fits modeM0/AS1A14_099T04_9000006540_55691cztM0_level2_quad_clean.evt
Size (bytes)511,660,80097,295,040
Size488.0 MB 92.8 MB
Events in quadrant A5,168,830608,697
Events in quadrant B3,896,632683,557
Events in quadrant C3,828,448625,514
Events in quadrant D5,524,499559,898

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0202052
B0162462
C0161652
D0211422

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0210
B0210
C0210
D0210

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A67194887.262986%
B67191702.530138%
C67201121.666667%
D67194937.337401%

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 8804 6719 394 394 4.48% 5.86%
B 8804 6721 66 66 0.75% 0.98%
C 8805 6722 91 91 1.03% 1.35%
D 8804 6721 490 490 5.57% 7.29%

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 7 64 1490690 8549.06 704 687 174.3
A 12 115 708575 4061.59 704 687 174.3
A 8 249 79236 450.68 704 687 174.3
B 5 236 605920 3938.69 709 683 153.7
B 4 206 204170 1324.23 709 683 153.7
B 5 172 169691 1099.85 709 683 153.7
C 9 38 571415 2935.2 703 697 194.4
C 15 147 247455 1269.08 703 697 194.4
C 6 223 88106 449.54 703 697 194.4
D 11 129 1311978 6784.92 680 647 193.3
D 8 245 814156 4209.15 680 647 193.3
D 10 181 499707 2582.17 680 647 193.3

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