ASTROSAT CZTI

Data Quality Report

Orbit 55175

Creation date: 2025-12-09T22:27:55.915799
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/AS1A14_022T16_9000006532_55175cztM0_level2.fits modeM0/AS1A14_022T16_9000006532_55175cztM0_level2_quad_clean.evt
Size (bytes)1,564,358,400341,732,160
Size1.5 GB 325.9 MB
Events in quadrant A17,062,4682,163,126
Events in quadrant B10,825,8032,416,594
Events in quadrant C14,568,0012,102,008
Events in quadrant D13,574,9011,996,438

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04900
B04900
C04900
D04900

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0679922
B0510292
C0607564
D0582873

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0130
B0130
C0130
D0130

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A2424914445.954885%
B242493661.509341%
C242488013.303365%
D242484701.938304%

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 25559 24251 1094 1094 4.28% 4.51%
B 25559 24251 58 58 0.23% 0.24%
C 25559 24251 540 540 2.11% 2.23%
D 25558 24250 338 338 1.32% 1.39%

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 3 78 4761423 7629.62 2537 2475 623.7
A 0 8 1293274 2069.43 2537 2475 623.7
A 3 45 647123 1033.51 2537 2475 623.7
B 5 185 238174 431.27 2541 2445 546.6
B 2 249 227146 411.09 2541 2445 546.6
B 4 81 136295 244.88 2541 2445 546.6
C 6 223 924459 1371.95 2467 2444 672.0
C 10 22 685951 1017.05 2467 2444 672.0
C 9 38 669604 992.73 2467 2444 672.0
D 11 129 2797290 4018.63 2485 2383 695.5
D 2 249 326025 465.34 2485 2383 695.5
D 2 120 204761 290.99 2485 2383 695.5

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