ASTROSAT CZTI

Data Quality Report

Orbit 57638

Creation date: 2026-05-25T09:31:38.554052
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_070T08_9000006576_57638cztM0_level2.fits modeM0/AS1A14_070T08_9000006576_57638cztM0_level2_quad_clean.evt
Size (bytes)1,902,804,480329,123,520
Size1.8 GB 313.9 MB
Events in quadrant A16,474,0742,160,913
Events in quadrant B11,317,6212,374,862
Events in quadrant C15,147,4182,060,735
Events in quadrant D25,682,8791,750,909

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0656205
B0505685
C0616645
D0925395

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0380
B0380
C0380
D0380

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04820
B04820
C04820
D04820

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A2349611614.941267%
B234973341.421458%
C234979073.860067%
D23497348714.840192%

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 27720 23785 796 796 2.87% 3.35%
B 27721 23786 68 68 0.25% 0.29%
C 27721 23785 643 643 2.32% 2.70%
D 27721 23786 3231 3231 11.66% 13.58%

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 4 249 3193213 5227.7 2492 2430 610.4
A 7 64 2946299 4823.16 2492 2430 610.4
A 3 14 310703 505.07 2492 2430 610.4
B 0 213 290568 541.38 2502 2406 532.3
B 5 172 233058 433.34 2502 2406 532.3
B 5 185 221543 411.7 2502 2406 532.3
C 15 224 4571709 6963.12 2424 2402 656.2
C 10 22 526226 798.25 2424 2402 656.2
C 14 254 229506 346.08 2424 2402 656.2
D 8 160 6602295 10256.71 2274 2164 643.5
D 15 142 5274259 8192.92 2274 2164 643.5
D 8 240 2224330 3453.28 2274 2164 643.5

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