ASTROSAT CZTI

Data Quality Report

Orbit 56241

Creation date: 2026-02-19T12:41:02.417854
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_083T04_9000006550_56241cztM0_level2.fits modeM0/AS1A14_083T04_9000006550_56241cztM0_level2_quad_clean.evt
Size (bytes)829,825,92084,332,160
Size791.4 MB 80.4 MB
Events in quadrant A15,182,049230,107
Events in quadrant B4,741,854688,102
Events in quadrant C4,890,253589,918
Events in quadrant D5,352,533550,816

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01440
B01440
C01440
D01440

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0180
B0180
C0180
D0180

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0499912
B0193012
C0196902
D0208372

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7103493769.505843%
B71034976.997044%
C71036248.785020%
D71036719.446713%

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 8873 7105 4542 4542 51.19% 63.93%
B 8873 7105 299 299 3.37% 4.21%
C 8873 7105 392 392 4.42% 5.52%
D 8873 7105 543 543 6.12% 7.64%

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 4727565 35524.93 527 514 133.1
A 7 64 2895045 21753.1 527 514 133.1
A 12 115 2452971 18430.81 527 514 133.1
B 4 206 1014812 6414.69 737 708 158.1
B 8 128 243811 1537.74 737 708 158.1
B 5 185 193659 1220.51 737 708 158.1
C 5 250 1184475 6142.57 706 701 192.7
C 15 230 513876 2662.85 706 701 192.7
C 5 233 144873 748.1 706 701 192.7
D 8 129 1723300 8661.52 699 664 198.9
D 2 249 253664 1272.1 699 664 198.9
D 6 239 250273 1255.05 699 664 198.9

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