ASTROSAT CZTI

Data Quality Report

Orbit 51783

Creation date: 2025-04-25T07:16:51.210861
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/AS1A13_090T01_9000006464_51783cztM0_level2.fits modeM0/AS1A13_090T01_9000006464_51783cztM0_level2_quad_clean.evt
Size (bytes)644,391,36097,286,400
Size614.5 MB 92.8 MB
Events in quadrant A5,311,292626,176
Events in quadrant B4,710,996718,801
Events in quadrant C4,724,531625,601
Events in quadrant D8,564,780488,058

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0200
B0200
C0200
D0200

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01440
B01440
C01440
D01440

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0205262
B0187852
C0186592
D0303253

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A69905187.410587%
B69902103.004292%
C69903074.391989%
D6990164723.562232%

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 8970 6992 481 481 5.36% 6.88%
B 8970 6992 106 106 1.18% 1.52%
C 8970 6992 271 271 3.02% 3.88%
D 8970 6990 1497 1497 16.69% 21.42%

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 15 174 1420433 7945.81 729 712 178.7
A 3 14 226337 1262.76 729 712 178.7
A 11 3 108637 604.03 729 712 178.7
B 4 206 816170 5082.15 745 716 160.5
B 4 174 258034 1603.68 745 716 160.5
B 0 171 226865 1409.43 745 716 160.5
C 15 218 383563 1919.93 722 718 199.4
C 14 245 357410 1788.78 722 718 199.4
C 9 38 341546 1709.22 722 718 199.4
D 11 129 5161821 28594.84 642 617 180.5
D 3 12 344369 1904.5 642 617 180.5
D 2 120 262848 1452.85 642 617 180.5

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