ASTROSAT CZTI

Data Quality Report

Orbit 58264

Creation date: 2026-07-05T11:14:57.651913
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_044T03_9000006588_58264cztM0_level2.fits modeM0/AS1A14_044T03_9000006588_58264cztM0_level2_quad_clean.evt
Size (bytes)617,886,72078,059,520
Size589.3 MB 74.4 MB
Events in quadrant A3,562,519542,765
Events in quadrant B5,042,750554,561
Events in quadrant C2,756,478550,957
Events in quadrant D11,051,934301,821

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01220
B01220
C01220
D01220

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0148221
B0189311
C0126482
D0368881

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A59073846.500762%
B590870711.966825%
C5907500.846453%
D5907281447.638395%

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 7052 5908 282 282 4.00% 4.77%
B 7053 5909 478 478 6.78% 8.09%
C 7052 5908 32 32 0.45% 0.54%
D 7052 5908 2786 2786 39.51% 47.16%

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 4 238 536688 3485.28 624 608 153.8
A 8 26 472453 3067.66 624 608 153.8
A 0 12 26503 168.35 624 608 153.8
B 2 249 1297656 10053.89 603 582 129.0
B 6 255 497096 3848.58 603 582 129.0
B 4 206 200628 1550.6 603 582 129.0
C 1 27 110664 638.74 619 613 172.3
C 12 252 39747 227.14 619 613 172.3
C 6 223 38359 219.08 619 613 172.3
D 12 110 6029498 40830.2 519 497 147.7
D 8 160 2158827 14616.86 519 497 147.7
D 7 222 144111 972.6 519 497 147.7

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