ASTROSAT CZTI

Data Quality Report

Orbit 57701

Creation date: 2026-05-28T15:10:39.850695
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_125T09_9000006578_57701cztM0_level2.fits modeM0/AS1A14_125T09_9000006578_57701cztM0_level2_quad_clean.evt
Size (bytes)406,244,16096,217,920
Size387.4 MB 91.8 MB
Events in quadrant A3,291,610628,010
Events in quadrant B3,393,445673,096
Events in quadrant C4,462,255594,655
Events in quadrant D3,384,788564,415

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A080
B080
C080
D080

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0141311
B0145781
C0177962
D0147651

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A64991221.877212%
B65001742.676923%
C64992583.969842%
D64991382.123404%

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 7244 6500 29 29 0.40% 0.45%
B 7245 6501 32 32 0.44% 0.49%
C 7244 6500 146 146 2.02% 2.25%
D 7244 6500 51 51 0.70% 0.78%

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 257456 1462.68 713 694 175.5
A 3 245 178204 1011.21 713 694 175.5
A 3 128 70451 397.38 713 694 175.5
B 4 80 198235 1323.18 703 677 149.3
B 5 185 104160 693.1 703 677 149.3
B 10 247 66972 444.02 703 677 149.3
C 15 224 869009 4604.52 692 683 188.6
C 12 254 465373 2464.14 692 683 188.6
C 14 96 201758 1066.25 692 683 188.6
D 8 240 222215 1143.69 693 662 193.7
D 8 160 140717 722.99 693 662 193.7
D 2 31 91299 467.88 693 662 193.7

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