ASTROSAT CZTI

Data Quality Report

Orbit 58975

Creation date: 2026-08-22T07:12:45.290639
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_004T07_9000006598_58975cztM0_level2.fits modeM0/AS1A14_004T07_9000006598_58975cztM0_level2_quad_clean.evt
Size (bytes)551,306,88094,279,680
Size525.8 MB 89.9 MB
Events in quadrant A5,077,001628,859
Events in quadrant B5,394,090625,263
Events in quadrant C4,065,069584,698
Events in quadrant D5,367,647562,348

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0195862
B0204692
C0166362
D0205482

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160
B0170
C0170
D0170

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A65011973.030303%
B650074211.415385%
C65003305.076923%
D65002674.107692%

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 7546 6502 105 105 1.39% 1.61%
B 7544 6500 495 495 6.56% 7.62%
C 7545 6501 277 277 3.67% 4.26%
D 7545 6501 200 200 2.65% 3.08%

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 3 14 1887994 10793.85 709 692 174.8
A 14 238 363476 2074.83 709 692 174.8
A 8 249 31586 176.69 709 692 174.8
B 6 255 1951931 13431.16 683 658 145.3
B 4 236 253427 1739.88 683 658 145.3
B 10 247 242754 1666.41 683 658 145.3
C 14 254 588269 3080.85 688 682 190.7
C 12 252 225628 1179.44 688 682 190.7
C 2 255 212804 1112.2 688 682 190.7
D 12 110 1709663 8716.35 686 655 196.1
D 6 239 380547 1937.54 686 655 196.1
D 2 249 234036 1190.3 686 655 196.1

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

TCT plots

Parameter TCT0 TCT_healed
Tct