ASTROSAT CZTI

Data Quality Report

Orbit 56521

Creation date: 2026-03-10T05:56:31.377134
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_060T01_9000006556_56521cztM0_level2.fits modeM0/AS1A14_060T01_9000006556_56521cztM0_level2_quad_clean.evt
Size (bytes)633,723,84088,655,040
Size604.4 MB 84.5 MB
Events in quadrant A9,457,931504,010
Events in quadrant B4,383,428645,952
Events in quadrant C4,752,091550,310
Events in quadrant D4,380,590546,897

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0325164
B0173262
C0185372
D0172422

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0140
B0150
C0150
D0150

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01280
B01280
C01280
D01280

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6257148123.669490%
B62574737.559533%
C62575438.678280%
D62572103.356241%

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 7477 6257 1380 1380 18.46% 22.06%
B 7477 6257 205 205 2.74% 3.28%
C 7477 6257 558 558 7.46% 8.92%
D 7477 6258 222 222 2.97% 3.55%

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 7 64 4007576 25574.29 632 619 156.7
A 0 12 2342455 14946.7 632 619 156.7
A 4 95 381720 2432.37 632 619 156.7
B 4 206 1336772 9161.42 679 656 145.8
B 7 252 70139 476.42 679 656 145.8
B 0 63 61325 415.99 679 656 145.8
C 15 230 1917217 10823.23 642 637 177.1
C 6 223 107787 605.09 642 637 177.1
C 12 252 85227 477.69 642 637 177.1
D 2 249 623257 3305.68 656 626 188.4
D 9 49 310395 1644.63 656 626 188.4
D 11 176 286168 1516.0 656 626 188.4

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