ASTROSAT CZTI

Data Quality Report

Orbit 51885

Creation date: 2025-05-02T04:11:16.878835
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/AS1C09_011T05_9000006466_51885cztM0_level2.fits modeM0/AS1C09_011T05_9000006466_51885cztM0_level2_quad_clean.evt
Size (bytes)807,647,04082,324,800
Size770.2 MB 78.5 MB
Events in quadrant A7,152,332579,561
Events in quadrant B4,946,121663,431
Events in quadrant C4,537,475595,223
Events in quadrant D12,759,285202,449

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0258622
B0193192
C0180322
D0423729

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0150
B0150
C0150
D0161

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A64776029.294426%
B64773034.678092%
C64773285.064073%
D6476441968.236566%

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 7527 6478 417 417 5.54% 6.44%
B 7527 6478 170 170 2.26% 2.62%
C 7527 6478 180 180 2.39% 2.78%
D 7526 6477 3411 3411 45.32% 52.66%

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 12 3 1745915 10434.45 668 652 167.3
A 4 175 1083035 6471.27 668 652 167.3
A 11 3 528173 3153.9 668 652 167.3
B 10 44 897758 6238.99 680 657 143.8
B 4 170 351084 2437.08 680 657 143.8
B 0 171 273938 1900.56 680 657 143.8
C 14 245 614285 3330.38 669 664 184.2
C 13 3 372214 2016.56 669 664 184.2
C 0 176 160048 865.04 669 664 184.2
D 11 129 6839574 59414.83 404 390 115.1
D 12 17 2296460 19946.91 404 390 115.1
D 6 42 1109623 9636.37 404 390 115.1

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