ASTROSAT CZTI

Data Quality Report

Orbit 55853

Creation date: 2026-01-24T07:17:58.777491
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_55853cztM0_level2.fits modeM0/AS1A14_127T10_9000006542_55853cztM0_level2_quad_clean.evt
Size (bytes)482,290,56095,440,320
Size459.9 MB 91.0 MB
Events in quadrant A4,502,137618,476
Events in quadrant B3,963,534678,602
Events in quadrant C4,991,175550,771
Events in quadrant D3,878,896578,340

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0179812
B0163272
C0197728
D0162052

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0140
B0150
C0150
D0150

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01360
D01360

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A66493294.948112%
B66492764.151000%
C664884912.770758%
D66481181.774970%

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 7838 6648 301 301 3.84% 4.53%
B 7839 6650 139 139 1.77% 2.09%
C 7837 6648 711 711 9.07% 10.69%
D 7838 6648 86 86 1.10% 1.29%

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 12 115 1010223 5928.01 692 675 170.3
A 8 192 249446 1460.77 692 675 170.3
A 4 249 184459 1079.17 692 675 170.3
B 5 185 991678 6504.81 694 666 152.4
B 0 197 72080 468.75 694 666 152.4
B 2 249 58295 378.27 694 666 152.4
C 15 199 1782241 10063.29 644 636 177.0
C 13 3 230357 1297.57 644 636 177.0
C 6 223 228934 1289.53 644 636 177.0
D 2 62 362030 1854.12 683 653 194.9
D 11 129 229784 1175.6 683 653 194.9
D 7 96 168216 859.71 683 653 194.9

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