ASTROSAT CZTI

Data Quality Report

Orbit 55620

Creation date: 2026-01-09T19:19:53.953695
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_021T06_9000006538_55620cztM0_level2.fits modeM0/AS1A14_021T06_9000006538_55620cztM0_level2_quad_clean.evt
Size (bytes)441,319,68094,633,920
Size420.9 MB 90.2 MB
Events in quadrant A5,493,808586,495
Events in quadrant B3,100,921672,048
Events in quadrant C3,712,784590,701
Events in quadrant D3,521,971561,943

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0140
B0150
C0150
D0150

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0207651
B0140781
C0160301
D0152711

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A65156299.654643%
B65151612.471220%
C65151802.762855%
D6515741.135840%

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 7640 6515 530 530 6.94% 8.14%
B 7640 6515 19 19 0.25% 0.29%
C 7640 6516 172 172 2.25% 2.64%
D 7640 6516 48 48 0.63% 0.74%

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 2449491 14851.66 668 652 164.9
A 0 8 234923 1420.8 668 652 164.9
A 3 14 115819 698.46 668 652 164.9
B 5 185 107129 734.5 678 655 145.0
B 4 142 54137 368.94 678 655 145.0
B 4 12 40538 275.13 678 655 145.0
C 12 2 503381 2795.19 656 650 179.9
C 13 3 213709 1184.61 656 650 179.9
C 9 38 201839 1118.61 656 650 179.9
D 8 160 361062 1969.1 657 627 183.0
D 11 129 120814 656.6 657 627 183.0
D 15 234 73183 396.38 657 627 183.0

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