ASTROSAT CZTI

Data Quality Report

Orbit 20181105_A05_004T04_9000002494_level2

Creation date: 2025-11-25T17:34:47.512998
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/AS1A05_004T04_9000002494cztM0_level2.fits modeM0/AS1A05_004T04_9000002494cztM0_level2_quad_clean.evt
Size (bytes)632,626,560589,642,560
Size603.3 MB 562.3 MB
Events in quadrant A3,823,3143,381,518
Events in quadrant B3,782,5743,577,510
Events in quadrant C3,818,6983,409,300
Events in quadrant D3,248,9103,006,134

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01080
B01080
C01080
D01080

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01833520
B01447700
C01517500
D01935190

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A013260
B013260
C013260
D013260

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6535553808.231964%
B6535511561.768801%
C6535512741.949354%
D6535549027.500574%

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 76080 65310 0 0 0.00% 0.00%
B 76080 65329 0 0 0.00% 0.00%
C 76080 65347 0 0 0.00% 0.00%
D 76079 65199 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 3589 10.71 996 934 247.9
A 7 110 3095 8.72 996 934 247.9
A 0 30 2795 7.51 996 934 247.9
B 2 9 3109 11.01 999 955 195.6
B 2 8 2617 8.5 999 955 195.6
B 5 128 2526 8.03 999 955 195.6
C 1 80 2772 7.0 1008 940 261.7
C 1 81 2759 6.95 1008 940 261.7
C 12 241 2693 6.7 1008 940 261.7
D 3 14 2344 6.16 926 844 243.6
D 7 3 2292 5.94 926 844 243.6
D 10 189 2258 5.8 926 844 243.6

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