ASTROSAT CZTI

Data Quality Report

Orbit 55796

Creation date: 2026-01-20T13:01:48.900017
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_127T10_9000006542_55796cztM0_level2.fits modeM0/AS1A14_127T10_9000006542_55796cztM0_level2_quad_clean.evt
Size (bytes)577,710,72079,833,600
Size550.9 MB 76.1 MB
Events in quadrant A8,297,497426,588
Events in quadrant B6,214,454505,238
Events in quadrant C2,586,056550,053
Events in quadrant D3,805,338502,350

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0289321
B0228901
C0130741
D0161581

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01260
B01260
C01260
D01260

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6201171027.576197%
B6201116918.851798%
C6202550.886811%
D62022844.579168%

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 7241 6203 1248 1248 17.24% 20.12%
B 7241 6203 897 897 12.39% 14.46%
C 7242 6204 8 8 0.11% 0.13%
D 7242 6204 253 253 3.49% 4.08%

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 15 32 5274924 39137.06 532 518 134.8
A 0 8 358609 2657.1 532 518 134.8
A 8 192 251748 1864.17 532 518 134.8
B 4 206 2720565 22543.58 556 536 120.7
B 7 0 630762 5223.31 556 536 120.7
B 5 172 543944 4503.76 556 536 120.7
C 13 3 114594 688.25 599 595 165.6
C 15 200 59834 357.65 599 595 165.6
C 6 223 27087 159.94 599 595 165.6
D 11 129 652785 3957.24 583 559 164.8
D 3 12 484244 2934.65 583 559 164.8
D 8 245 122676 740.92 583 559 164.8

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