ASTROSAT CZTI

Data Quality Report

Orbit 57291

Creation date: 2026-05-01T00:29:28.390557
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_57291cztM0_level2.fits modeM0/AS1A14_049T03_9000006570_57291cztM0_level2_quad_clean.evt
Size (bytes)426,798,72096,091,200
Size407.0 MB 91.6 MB
Events in quadrant A3,403,728641,830
Events in quadrant B3,223,639689,015
Events in quadrant C4,050,410594,983
Events in quadrant D4,631,218544,221

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0142412
B0138253
C0164612
D0181382

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0150
B0160
C0160
D0160

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01280
B01280
C01280
D01280

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6302630.999683%
B6301741.174417%
C63011712.713855%
D63013725.903825%

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 7507 6303 24 24 0.32% 0.38%
B 7506 6302 21 21 0.28% 0.33%
C 7506 6302 138 138 1.84% 2.19%
D 7506 6302 343 343 4.57% 5.44%

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 8 4 375227 2161.07 701 684 173.3
A 3 14 242462 1395.03 701 684 173.3
A 4 3 14935 82.23 701 684 173.3
B 5 185 256304 1721.88 692 664 148.5
B 10 247 53004 352.54 692 664 148.5
B 7 252 35831 236.87 692 664 148.5
C 15 224 1018225 5664.61 661 656 179.6
C 6 223 117801 652.12 661 656 179.6
C 14 254 114173 631.93 661 656 179.6
D 3 12 837101 4481.65 653 622 186.6
D 3 224 791341 4236.47 653 622 186.6
D 8 240 209509 1119.16 653 622 186.6

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