ASTROSAT CZTI

Data Quality Report

Orbit 16776

Creation date: 2024-06-27T17:27:36.607428
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/AS1A05_004T02_9000002490_16776cztM0_level2.evt modeM0/AS1A05_004T02_9000002490_16776cztM0_level2_quad_clean.evt
Size (bytes)826,646,40093,726,720
Size788.4 MB 89.4 MB
Events in quadrant A3,577,358745,310
Events in quadrant B3,694,907742,540
Events in quadrant C4,009,367699,616
Events in quadrant D13,313,883196,117

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0147143
B0150392
C0163172
D0440422

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0230
B0230
C0230
D0240

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6489951.464016%
B64891362.095855%
C64891472.265372%
D6489555085.529357%

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 7820 6491 1 1 0.01% 0.02%
B 7820 6491 15 15 0.19% 0.23%
C 7820 6491 1 1 0.01% 0.02%
D 7819 6490 3931 3931 50.27% 60.57%

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 98142 542.68 903 886 179.2
A 0 13 8208 40.86 903 886 179.2
A 0 226 7963 39.49 903 886 179.2
B 15 35 90830 546.91 885 866 164.5
B 5 236 75686 454.85 885 866 164.5
B 0 229 36491 216.57 885 866 164.5
C 3 233 472679 2434.72 843 850 193.8
C 14 238 133370 683.83 843 850 193.8
C 0 207 113348 580.51 843 850 193.8
D 1 52 11710308 143068.77 340 331 81.8
D 12 110 238987 2915.82 340 331 81.8
D 10 70 33963 410.91 340 331 81.8

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