ASTROSAT CZTI

Data Quality Report

Orbit 20200128_A07_127T01_9000003468_level2

Creation date: 2025-12-09T01:12:02.808929
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/AS1A07_127T01_9000003468cztM0_level2.fits modeM0/AS1A07_127T01_9000003468cztM0_level2_quad_clean.evt
Size (bytes)401,569,920336,741,120
Size383.0 MB 321.1 MB
Events in quadrant A2,545,9422,030,629
Events in quadrant B2,410,5762,023,847
Events in quadrant C2,364,9601,707,322
Events in quadrant D2,104,3401,702,829

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A08120
B08120
C08120
D08120

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0590
B0590
C0590
D0590

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0836610
B0863360
C01254190
D01172430

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A397835121.286982%
B397837141.794736%
C39783544113.676696%
D3978335378.890732%

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 44677 39778 0 0 0.00% 0.00%
B 44677 39776 0 0 0.00% 0.00%
C 44677 39778 0 0 0.00% 0.00%
D 44677 39772 0 0 0.00% 0.00%

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 0 29 2364 10.74 662 621 162.3
A 7 110 2063 8.88 662 621 162.3
A 9 19 1926 8.04 662 621 162.3
B 2 9 2006 11.01 636 606 127.1
B 2 8 1658 8.27 636 606 127.1
B 5 128 1606 7.87 636 606 127.1
C 1 80 1846 7.97 624 586 158.1
C 1 81 1778 7.54 624 586 158.1
C 12 250 1596 6.39 624 586 158.1
D 3 14 1519 6.08 601 549 159.5
D 6 231 1491 5.91 601 549 159.5
D 6 67 1457 5.69 601 549 159.5

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