ASTROSAT CZTI

Data Quality Report

Orbit 52990

Creation date: 2025-07-15T13:28:30.384650
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/AS1A13_003T01_9000006486_52990cztM0_level2.fits modeM0/AS1A13_003T01_9000006486_52990cztM0_level2_quad_clean.evt
Size (bytes)973,393,92062,879,040
Size928.3 MB 60.0 MB
Events in quadrant A12,209,237247,626
Events in quadrant B2,799,700647,075
Events in quadrant C8,669,346380,073
Events in quadrant D11,884,441204,390

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04046921
B01276013
C02992429
D03951245

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01260
B01260
C01260
D01260

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6070397265.436573%
B6066380.626442%
C6070215635.518946%
D6068400566.001978%

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 7219 6073 3234 3234 44.80% 53.25%
B 7219 6073 7 7 0.10% 0.12%
C 7219 6075 1771 1771 24.53% 29.15%
D 7220 6075 3241 3241 44.89% 53.35%

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 9 191 8736244 76418.09 456 445 114.3
A 15 190 753604 6588.4 456 445 114.3
A 4 249 603397 5274.44 456 445 114.3
B 1 255 44091 317.04 642 620 137.1
B 10 254 35133 251.71 642 620 137.1
B 10 247 34356 246.04 642 620 137.1
C 1 241 3741239 26762.53 503 501 139.8
C 9 38 798140 5706.58 503 501 139.8
C 15 206 390164 2787.78 503 501 139.8
D 2 62 7478317 64808.78 400 382 115.4
D 8 176 1284028 11124.93 400 382 115.4
D 2 37 544302 4713.97 400 382 115.4

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