ASTROSAT CZTI

Data Quality Report

Orbit 57955

Creation date: 2026-06-14T19:50:10.704799
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/AS1A14_031T01_9000006584_57955cztM0_level2.fits modeM0/AS1A14_031T01_9000006584_57955cztM0_level2_quad_clean.evt
Size (bytes)1,748,969,280344,868,480
Size1.6 GB 328.9 MB
Events in quadrant A11,640,4942,274,889
Events in quadrant B11,947,9992,448,198
Events in quadrant C15,797,6222,141,111
Events in quadrant D23,458,0401,889,273

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0180
B0180
C0180
D0180

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0522403
B0526723
C0640923
D0870324

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04960
B04960
C04960
D04960

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A245386282.559296%
B245397142.909654%
C245399934.046620%
D24538273011.125601%

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 26293 24542 83 83 0.32% 0.34%
B 26294 24543 67 67 0.25% 0.27%
C 26294 24543 477 477 1.81% 1.94%
D 26293 24541 2082 2082 7.92% 8.48%

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 4 3 275057 411.18 2714 2644 662.5
A 6 161 217885 324.88 2714 2644 662.5
A 3 245 210159 313.22 2714 2644 662.5
B 0 213 240754 415.88 2666 2560 572.7
B 10 128 223313 385.43 2666 2560 572.7
B 5 185 187843 323.5 2666 2560 572.7
C 15 224 3120552 4429.55 2609 2589 703.9
C 1 16 1291720 1831.41 2609 2589 703.9
C 14 254 381842 538.79 2609 2589 703.9
D 12 110 8869857 12525.39 2523 2411 708.0
D 2 249 3176966 4484.1 2523 2411 708.0
D 8 240 546385 768.37 2523 2411 708.0

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