ASTROSAT CZTI

Data Quality Report

Orbit 55640

Creation date: 2026-01-13T14:51:33.533443
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_55640cztM0_level2.fits modeM0/AS1A14_021T06_9000006538_55640cztM0_level2_quad_clean.evt
Size (bytes)452,280,96099,385,920
Size431.3 MB 94.8 MB
Events in quadrant A4,270,674649,146
Events in quadrant B3,071,071702,881
Events in quadrant C3,342,328610,005
Events in quadrant D5,507,935554,282

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0177430
B0146000
C0154280
D0212983

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01420
B01420
C01420
D01420

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7077751.059771%
B7078200.282566%
C7078791.116135%
D70774416.231454%

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 7076 7076 63 63 0.89% 0.89%
B 7077 7077 6 6 0.08% 0.08%
C 7077 7077 83 83 1.17% 1.17%
D 7076 7076 502 502 7.09% 7.09%

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 702484 3920.07 723 705 179.0
A 8 249 345651 1926.83 723 705 179.0
A 0 8 174763 972.27 723 705 179.0
B 0 171 77554 492.49 720 691 156.1
B 10 247 43940 277.11 720 691 156.1
B 7 252 26488 165.29 720 691 156.1
C 9 38 286731 1479.6 703 694 193.3
C 12 250 68063 348.48 703 694 193.3
C 13 3 42841 218.02 703 694 193.3
D 8 245 1019990 5209.19 693 664 195.7
D 11 129 984667 5028.67 693 664 195.7
D 3 12 252907 1289.07 693 664 195.7

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