ASTROSAT CZTI

Data Quality Report

Orbit 59081

Creation date: 2026-08-29T10:56:11.018100
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_004T02_9000006600_59081cztM0_level2.fits modeM0/AS1A14_004T02_9000006600_59081cztM0_level2_quad_clean.evt
Size (bytes)691,355,52078,747,840
Size659.3 MB 75.1 MB
Events in quadrant A3,022,256610,375
Events in quadrant B4,469,918621,432
Events in quadrant C2,926,588583,873
Events in quadrant D14,689,289134,404

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0133991
B0176181
C0134132
D0475771

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01260
B01260
C01260
D01260

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6222761.221472%
B62234787.681183%
C62221121.800064%
D6222490178.768885%

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 7257 6223 17 17 0.23% 0.27%
B 7258 6223 317 317 4.37% 5.09%
C 7257 6223 47 47 0.65% 0.76%
D 7256 6221 4856 4856 66.92% 78.06%

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 13 248 154215 891.6 697 677 172.2
A 10 251 45797 262.01 697 677 172.2
A 0 24 45746 261.72 697 677 172.2
B 10 128 1421233 9855.85 678 654 144.1
B 5 185 287406 1989.46 678 654 144.1
B 12 111 17820 119.1 678 654 144.1
C 15 198 136319 737.34 671 665 184.0
C 6 223 59440 319.47 671 665 184.0
C 14 254 45175 241.93 671 665 184.0
D 12 1 12939925 147795.45 307 293 87.6
D 6 239 257335 2935.91 307 293 87.6
D 2 31 164796 1878.94 307 293 87.6

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

TCT plots

Parameter TCT0 TCT_healed
Tct