ASTROSAT CZTI

Data Quality Report

Orbit 01673

Creation date: 2026-03-07T11:32:24.204080
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/AS1G02_049T01_9000000280_01673cztM0_level2.fits modeM0/AS1G02_049T01_9000000280_01673cztM0_level2_quad_clean.evt
Size (bytes)882,656,640109,077,120
Size841.8 MB 104.0 MB
Events in quadrant A8,263,845721,825
Events in quadrant B8,747,700744,607
Events in quadrant C7,850,350703,435
Events in quadrant D7,283,554652,430

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0294893
B0308822
C0282272
D0266152

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0110

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A690970.101317%
B6909110.159213%
C6909250.361847%
D690940.057895%

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 7734 6910 179 179 2.31% 2.59%
B 7734 6910 213 213 2.75% 3.08%
C 7734 6910 168 168 2.17% 2.43%
D 7734 6910 77 77 1.00% 1.11%

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 14 5 137914 265.96 2119 2139 510.5
A 8 14 20586 36.13 2119 2139 510.5
A 0 128 5981 7.53 2119 2139 510.5
B 8 3 319204 604.69 2210 2217 524.2
B 0 220 25833 45.05 2210 2217 524.2
B 0 234 19981 33.89 2210 2217 524.2
C 9 85 61015 106.59 1979 2044 553.2
C 8 208 48874 84.65 1979 2044 553.2
C 12 4 11543 17.17 1979 2044 553.2
D 7 34 23481 39.25 1938 1978 547.9
D 9 65 13014 20.14 1938 1978 547.9
D 2 54 9626 13.96 1938 1978 547.9

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