ASTROSAT CZTI

Data Quality Report

Orbit 20200412_T03_187T01_9000003608_level2

Creation date: 2025-12-10T13:00:56.310525
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/AS1T03_187T01_9000003608cztM0_level2.fits modeM0/AS1T03_187T01_9000003608cztM0_level2_quad_clean.evt
Size (bytes)646,076,160707,319,360
Size616.1 MB 674.6 MB
Events in quadrant A4,081,1344,501,495
Events in quadrant B3,861,1764,481,628
Events in quadrant C3,849,2744,181,467
Events in quadrant D3,288,2243,772,105

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A013340
B013340
C013340
D013340

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0980
B0980
C0980
D0980

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01357490
B01392750
C01393360
D02245580

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A653946160.941982%
B653959771.493998%
C6539510691.634682%
D6539543286.618243%

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 75254 65393 0 0 0.00% 0.00%
B 75255 65390 0 0 0.00% 0.00%
C 75255 65393 0 0 0.00% 0.00%
D 75255 65371 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 3883 11.07 1062 1003 260.1
A 7 110 3360 9.06 1062 1003 260.1
A 0 30 3055 7.89 1062 1003 260.1
B 2 9 3036 10.43 1022 982 197.0
B 5 128 2561 8.01 1022 982 197.0
B 2 8 2497 7.69 1022 982 197.0
C 12 241 2647 6.55 1018 955 258.2
C 12 250 2576 6.28 1018 955 258.2
C 9 209 2574 6.27 1018 955 258.2
D 4 246 2510 6.51 939 857 254.1
D 15 46 2406 6.1 939 857 254.1
D 3 14 2397 6.06 939 857 254.1

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