ASTROSAT CZTI

Data Quality Report

Orbit 55901

Creation date: 2026-01-30T15:18:49.110414
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_030T02_9000006544_55901cztM0_level2.fits modeM0/AS1A14_030T02_9000006544_55901cztM0_level2_quad_clean.evt
Size (bytes)560,355,840123,088,320
Size534.4 MB 117.4 MB
Events in quadrant A4,054,528806,988
Events in quadrant B4,158,818861,173
Events in quadrant C5,748,231743,980
Events in quadrant D6,101,179707,386

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01760
B01760
C01760
D01760

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A030
B030
C030
D030

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0187441
B0189861
C0234761
D0244961

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8753730.834000%
B87522202.513711%
C87525536.318556%
D87524094.673218%

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 9013 8754 37 37 0.41% 0.42%
B 9012 8753 28 28 0.31% 0.32%
C 9012 8753 394 394 4.37% 4.50%
D 9012 8753 376 376 4.17% 4.30%

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 198114 862.45 935 910 228.7
A 0 8 59986 258.36 935 910 228.7
A 3 14 52783 226.86 935 910 228.7
B 7 252 209712 1048.45 928 890 199.2
B 5 185 94471 469.85 928 890 199.2
B 0 199 66410 328.96 928 890 199.2
C 15 199 1023088 4213.1 894 886 242.6
C 12 252 710808 2926.01 894 886 242.6
C 13 3 336035 1381.34 894 886 242.6
D 11 129 912432 3639.29 894 854 250.5
D 15 125 844415 3367.75 894 854 250.5
D 2 31 479217 1909.77 894 854 250.5

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