ASTROSAT CZTI

Data Quality Report

Orbit 56902

Creation date: 2026-04-04T20:39:15.046949
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_083T14_9000006564_56902cztM0_level2.fits modeM0/AS1A14_083T14_9000006564_56902cztM0_level2_quad_clean.evt
Size (bytes)542,727,36090,501,120
Size517.6 MB 86.3 MB
Events in quadrant A3,071,859618,400
Events in quadrant B4,736,105630,506
Events in quadrant C4,118,639578,986
Events in quadrant D7,651,679453,227

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A060
B060
C060
D060

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0142161
B0187071
C0173281
D0273451

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A65891051.593565%
B65894306.526028%
C65902934.446131%
D6590151322.959029%

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 7169 6590 30 30 0.42% 0.46%
B 7169 6590 216 216 3.01% 3.28%
C 7170 6591 223 223 3.11% 3.38%
D 7170 6591 1332 1332 18.58% 20.21%

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 4 249 129995 757.79 683 664 170.7
A 10 251 120604 702.76 683 664 170.7
A 6 211 82602 480.1 683 664 170.7
B 5 172 951972 6773.36 658 634 140.5
B 5 185 576692 4101.43 658 634 140.5
B 0 171 130968 927.96 658 634 140.5
C 12 254 647227 3651.88 646 639 177.1
C 13 3 336189 1895.16 646 639 177.1
C 9 38 319730 1802.2 646 639 177.1
D 2 249 2984177 17685.97 595 567 168.7
D 7 96 1068657 6331.32 595 567 168.7
D 8 240 756524 4481.09 595 567 168.7

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