ASTROSAT CZTI

Data Quality Report

Orbit 00975

Creation date: 2024-06-27T14:05:34.907627
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/AS1P01_998T01_9000000188_00975cztM0_level2.evt modeM0/AS1P01_998T01_9000000188_00975cztM0_level2_quad_clean.evt
Size (bytes)1,303,804,800117,786,240
Size1.2 GB 112.3 MB
Events in quadrant A9,738,271767,040
Events in quadrant B10,122,589768,895
Events in quadrant C9,882,467752,384
Events in quadrant D9,223,781733,446

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0344850
B0356040
C0348920
D0330280

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A020
B020
C020
D020

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01620
B01620
C01620
D01620

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7842100.127518%
B7841340.433618%
C7842310.395307%
D78421191.517470%

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 8117 7847 458 458 5.64% 5.84%
B 8116 7846 551 551 6.79% 7.02%
C 8117 7847 471 471 5.80% 6.00%
D 8117 7847 452 452 5.57% 5.76%

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 14 170 315282 530.96 2443 2454 589.2
A 12 189 32706 51.35 2443 2454 589.2
A 10 133 13473 18.7 2443 2454 589.2
B 0 220 77713 123.24 2580 2590 609.5
B 5 200 71675 113.34 2580 2590 609.5
B 5 249 42877 66.09 2580 2590 609.5
C 15 241 381005 572.97 2377 2464 660.7
C 9 52 47636 68.37 2377 2464 660.7
C 3 111 38500 54.55 2377 2464 660.7
D 1 4 276228 391.73 2255 2334 699.2
D 2 63 264540 375.01 2255 2334 699.2
D 1 83 48806 66.46 2255 2334 699.2

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