ASTROSAT CZTI

Data Quality Report

Orbit 20181215_A05_074T02_9000002572_level2

Creation date: 2025-11-26T15:25:06.486864
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_074T02_9000002572cztM0_level2.fits modeM0/AS1A05_074T02_9000002572cztM0_level2_quad_clean.evt
Size (bytes)284,319,360200,381,760
Size271.1 MB 191.1 MB
Events in quadrant A1,774,2281,081,483
Events in quadrant B1,687,0241,075,742
Events in quadrant C1,699,2041,011,519
Events in quadrant D1,459,244907,569

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05900
B05900
C05900
D05900

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0550
B0550
C0550
D0550

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0604530
B0644210
C0604210
D0783010

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A289593141.084292%
B289596432.220381%
C289594391.515936%
D2895913654.713561%

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 34434 28958 0 0 0.00% 0.00%
B 34434 28958 0 0 0.00% 0.00%
C 34434 28959 0 0 0.00% 0.00%
D 34434 28941 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 1664 10.61 462 434 115.9
A 7 110 1468 8.92 462 434 115.9
A 9 19 1297 7.45 462 434 115.9
B 2 9 1354 10.43 446 427 88.9
B 3 80 1153 8.17 446 427 88.9
B 2 8 1142 8.04 446 427 88.9
C 12 241 1195 6.73 449 420 115.1
C 3 126 1167 6.49 449 420 115.1
C 7 111 1144 6.29 449 420 115.1
D 3 14 1168 7.05 416 380 111.8
D 6 67 1071 6.18 416 380 111.8
D 3 31 1021 5.73 416 380 111.8

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