ASTROSAT CZTI

Data Quality Report

Orbit 56838

Creation date: 2026-03-31T12:51:16.241401
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_083T03_9000006562_56838cztM0_level2.fits modeM0/AS1A14_083T03_9000006562_56838cztM0_level2_quad_clean.evt
Size (bytes)455,382,72087,963,840
Size434.3 MB 83.9 MB
Events in quadrant A4,790,551578,930
Events in quadrant B5,295,585561,916
Events in quadrant C2,860,375564,422
Events in quadrant D3,429,930526,630

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01260
B01260
C01260
D01260

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0185691
B0198791
C0129441
D0145461

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A61801562.524272%
B618083813.559871%
C6181520.841288%
D61811262.038505%

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 7144 6180 73 73 1.02% 1.18%
B 7145 6181 557 557 7.80% 9.01%
C 7146 6182 7 7 0.10% 0.11%
D 7146 6182 82 82 1.15% 1.33%

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 3 14 1860737 11440.92 658 641 162.6
A 10 251 197787 1212.59 658 641 162.6
A 3 62 104342 637.84 658 641 162.6
B 5 185 2411311 17695.16 626 602 136.2
B 10 16 163939 1198.93 626 602 136.2
B 0 229 59900 435.26 626 602 136.2
C 15 230 63072 352.66 653 646 177.0
C 13 3 57424 320.75 653 646 177.0
C 14 254 47494 264.65 653 646 177.0
D 8 240 473799 2620.38 643 615 180.6
D 2 249 268322 1482.5 643 615 180.6
D 5 173 48446 264.88 643 615 180.6

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