ASTROSAT CZTI

Data Quality Report

Orbit 58677

Creation date: 2026-08-02T14:24:11.470910
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_004T06_9000006594_58677cztM0_level2.fits modeM0/AS1A14_004T06_9000006594_58677cztM0_level2_quad_clean.evt
Size (bytes)1,484,400,960347,840,640
Size1.4 GB 331.7 MB
Events in quadrant A12,670,3082,258,129
Events in quadrant B16,125,6292,317,829
Events in quadrant C11,500,5182,239,730
Events in quadrant D12,803,2472,074,332

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A055497132
B065015176
C051929120
D056185573

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04882
B04882
C04882
D04880

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0210
B0210
C0210
D0210

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A238657062.958307%
B2385919208.047278%
C238682070.867270%
D238375662.374460%

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 26054 23886 534 534 2.05% 2.24%
B 26038 23883 1170 1170 4.49% 4.90%
C 26041 23885 160 160 0.61% 0.67%
D 26032 23852 495 495 1.90% 2.08%

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 10 17 1616929 2563.21 2559 2491 629.8
A 10 251 481937 761.21 2559 2491 629.8
A 0 24 168049 262.85 2559 2491 629.8
B 5 172 4836107 9168.94 2494 2400 527.2
B 8 234 429954 811.02 2494 2400 527.2
B 0 186 231210 434.02 2494 2400 527.2
C 14 254 420726 597.89 2554 2528 699.5
C 12 249 376225 534.27 2554 2528 699.5
C 12 252 179036 252.35 2554 2528 699.5
D 2 249 1059174 1476.76 2515 2398 715.6
D 1 27 619927 862.95 2515 2398 715.6
D 7 222 278789 386.23 2515 2398 715.6

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