ASTROSAT CZTI

Data Quality Report

Orbit 20161218_A02_082T01_9000000898_level2

Creation date: 2025-11-08T17:21:18.641501
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/AS1A02_082T01_9000000898cztM0_level2.fits modeM0/AS1A02_082T01_9000000898cztM0_level2_quad_clean.evt
Size (bytes)622,638,720555,814,080
Size593.8 MB 530.1 MB
Events in quadrant A3,748,1783,220,097
Events in quadrant B3,640,9223,178,986
Events in quadrant C3,716,9503,022,781
Events in quadrant D3,126,5222,787,592

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01000
B01000
C01000
D01000

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01402200
B01440720
C01386440
D01918660

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A013720
B013720
C013720
D013720

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6739911311.678066%
B6739913812.048992%
C673998591.274500%
D6739928384.210745%

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 77499 67399 0 0 0.00% 0.00%
B 77499 67399 0 0 0.00% 0.00%
C 77499 67400 0 0 0.00% 0.00%
D 77499 67382 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 3575 10.76 971 903 248.2
A 7 110 3182 9.18 971 903 248.2
A 0 30 2828 7.75 971 903 248.2
B 2 9 3082 10.88 958 904 200.2
B 12 226 2493 7.94 958 904 200.2
B 5 128 2456 7.75 958 904 200.2
C 12 241 2683 6.75 981 906 263.4
C 1 81 2680 6.73 981 906 263.4
C 1 80 2678 6.73 981 906 263.4
D 3 14 2393 6.57 891 807 241.4
D 11 82 2311 6.23 891 807 241.4
D 6 231 2270 6.06 891 807 241.4

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