ASTROSAT CZTI

Data Quality Report

Orbit 37685

Creation date: 2024-06-27T21:43:06.116888
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/AS1A11_075T01_9000005342_37685cztM0_level2.evt modeM0/AS1A11_075T01_9000005342_37685cztM0_level2_quad_clean.evt
Size (bytes)476,380,80081,702,720
Size454.3 MB 77.9 MB
Events in quadrant A3,828,293503,227
Events in quadrant B3,085,452517,328
Events in quadrant C3,106,092520,936
Events in quadrant D3,974,490487,805

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0155643
B0135292
C0132072
D0165082

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0280
B0280
C0280
D0280

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A63791622.539583%
B6379420.658410%
C6379120.188117%
D63792413.778022%

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 9155 6379 142 142 1.55% 2.23%
B 9156 6379 19 19 0.21% 0.30%
C 9156 6379 9 9 0.10% 0.14%
D 9156 6380 197 197 2.15% 3.09%

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 15 222 402721 2812.4 705 692 142.9
A 10 83 347260 2424.42 705 692 142.9
A 13 248 328413 2292.57 705 692 142.9
B 5 200 63312 453.29 717 695 138.1
B 5 172 43962 313.21 717 695 138.1
B 15 85 39810 283.15 717 695 138.1
C 15 214 277171 1699.97 705 709 162.6
C 0 10 68954 419.64 705 709 162.6
C 15 159 6808 37.5 705 709 162.6
D 2 249 635240 3778.44 690 671 167.9
D 13 249 212701 1262.5 690 671 167.9
D 12 227 146352 867.43 690 671 167.9

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