ASTROSAT CZTI

Data Quality Report

Orbit 55852

Creation date: 2026-01-24T06:39:03.477431
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_127T10_9000006542_55852cztM0_level2.fits modeM0/AS1A14_127T10_9000006542_55852cztM0_level2_quad_clean.evt
Size (bytes)430,752,96097,983,360
Size410.8 MB 93.4 MB
Events in quadrant A4,235,155632,315
Events in quadrant B3,078,379696,725
Events in quadrant C3,711,098607,455
Events in quadrant D4,403,243566,612

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0170482
B0141852
C0160112
D0178292

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0210
B0220
C0220
D0220

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A66511822.736431%
B6651620.932191%
C66512233.352879%
D66512874.315141%

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 7826 6652 174 174 2.22% 2.62%
B 7826 6652 20 20 0.26% 0.30%
C 7826 6652 232 232 2.96% 3.49%
D 7826 6651 312 312 3.99% 4.69%

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 12 115 993750 5727.21 692 674 173.4
A 8 192 225286 1295.37 692 674 173.4
A 4 3 101858 583.54 692 674 173.4
B 5 185 168622 1115.69 696 670 150.5
B 10 247 43096 281.83 696 670 150.5
B 0 197 27759 179.95 696 670 150.5
C 1 246 558449 3001.61 680 673 185.8
C 6 223 205893 1104.37 680 673 185.8
C 13 3 159447 854.42 680 673 185.8
D 11 129 899361 4697.53 673 642 191.3
D 7 96 203097 1058.22 673 642 191.3
D 2 62 187682 977.64 673 642 191.3

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