ASTROSAT CZTI

Data Quality Report

Orbit 57276

Creation date: 2026-04-30T00:26:38.823359
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_049T03_9000006570_57276cztM0_level2.fits modeM0/AS1A14_049T03_9000006570_57276cztM0_level2_quad_clean.evt
Size (bytes)555,477,12080,256,960
Size529.7 MB 76.5 MB
Events in quadrant A9,239,797380,473
Events in quadrant B2,890,820618,934
Events in quadrant C4,573,880516,986
Events in quadrant D3,407,601508,294

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0314901
B0126661
C0177061
D0141871

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01200
B01200
C01200
D01200

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5791228539.457779%
B5791921.588672%
C57924327.458564%
D57921502.589779%

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 6971 5790 1854 1854 26.60% 32.02%
B 6971 5791 33 33 0.47% 0.57%
C 6972 5791 291 291 4.17% 5.03%
D 6972 5792 144 144 2.07% 2.49%

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 95 6680832 52730.83 512 499 126.7
A 8 4 296559 2336.93 512 499 126.7
A 3 14 214358 1688.08 512 499 126.7
B 7 252 168334 1269.36 620 599 132.1
B 5 185 66019 495.08 620 599 132.1
B 0 199 56860 425.76 620 599 132.1
C 15 224 1904252 11830.91 583 578 160.9
C 14 254 151785 939.72 583 578 160.9
C 14 67 85523 527.91 583 578 160.9
D 2 249 317197 1872.46 595 568 169.1
D 3 224 225209 1328.47 595 568 169.1
D 8 240 187524 1105.61 595 568 169.1

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