ASTROSAT CZTI

Data Quality Report

Orbit 20220524_A11_050T19_9000005156_level2

Creation date: 2026-01-02T18:43:04.365937
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/AS1A11_050T19_9000005156cztM0_level2.fits modeM0/AS1A11_050T19_9000005156cztM0_level2_quad_clean.evt
Size (bytes)86,860,800125,441,280
Size82.8 MB 119.6 MB
Events in quadrant A538,828856,966
Events in quadrant B508,470842,438
Events in quadrant C495,168749,788
Events in quadrant D437,630699,522

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0192380
B0202690
C0290150
D0298650

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01920
B01920
C01920
D01900

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0230
B0230
C0230
D0250

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A9364130.138830%
B9376430.458618%
C93648609.184109%
D93647237.721059%

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 66254 9402 0 0 0.00% 0.00%
B 66254 9400 0 0 0.00% 0.00%
C 66254 9321 0 0 0.00% 0.00%
D 66254 9378 0 0 0.00% 0.00%

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 7 110 456 8.99 140 132 36.1
A 9 19 437 8.46 140 132 36.1
A 0 29 423 8.07 140 132 36.1
B 2 9 401 9.64 134 129 28.2
B 3 80 372 8.61 134 129 28.2
B 2 8 351 7.87 134 129 28.2
C 1 81 423 8.47 131 123 35.4
C 1 80 419 8.36 131 123 35.4
C 3 203 395 7.68 131 123 35.4
D 10 189 350 6.78 125 115 34.7
D 6 67 322 5.97 125 115 34.7
D 4 160 320 5.91 125 115 34.7

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