ASTROSAT CZTI

Data Quality Report

Orbit 20180810_T02_078T01_9000002294_level2

Creation date: 2025-11-24T00:39:31.354922
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/AS1T02_078T01_9000002294cztM0_level2.fits modeM0/AS1T02_078T01_9000002294cztM0_level2_quad_clean.evt
Size (bytes)160,620,480144,555,840
Size153.2 MB 137.9 MB
Events in quadrant A1,002,620851,954
Events in quadrant B961,336862,920
Events in quadrant C984,750841,906
Events in quadrant D860,428764,870

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0350
B0350
C0350
D0350

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03120
B03120
C03120
D03120

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0346490
B0340080
C0339160
D0380310

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A152953011.967963%
B152951841.203008%
C152952381.556064%
D152954272.791762%

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 18800 15293 0 0 0.00% 0.00%
B 18800 15293 0 0 0.00% 0.00%
C 18800 15293 0 0 0.00% 0.00%
D 18800 15292 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 0 29 982 11.61 261 248 63.2
A 7 110 799 8.72 261 248 63.2
A 9 19 781 8.43 261 248 63.2
B 2 9 794 11.0 254 244 50.0
B 5 128 685 8.82 254 244 50.0
B 14 254 645 8.02 254 244 50.0
C 1 81 781 7.97 260 246 67.1
C 1 80 740 7.36 260 246 67.1
C 2 191 682 6.5 260 246 67.1
D 10 189 638 6.18 246 226 66.7
D 6 231 622 5.94 246 226 66.7
D 3 14 615 5.83 246 226 66.7

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