ASTROSAT CZTI

Data Quality Report

Orbit 57853

Creation date: 2026-06-07T21:30:33.006256
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_125T11_9000006582_57853cztM0_level2.fits modeM0/AS1A14_125T11_9000006582_57853cztM0_level2_quad_clean.evt
Size (bytes)1,771,770,240342,843,840
Size1.7 GB 327.0 MB
Events in quadrant A11,433,1012,276,351
Events in quadrant B11,667,0362,421,676
Events in quadrant C21,536,2852,026,978
Events in quadrant D19,078,1271,989,130

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04880
B04880
C04880
D04880

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0514733
B0524313
C0810363
D0738243

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0150
B0150
C0150
D0150

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A242122801.156451%
B242124902.023790%
C2421221258.776640%
D2421213565.600529%

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 25777 24214 16 16 0.06% 0.07%
B 25777 24214 129 129 0.50% 0.53%
C 25777 24214 1539 1539 5.97% 6.36%
D 25777 24214 1310 1310 5.08% 5.41%

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 7 64 1130187 1774.67 2585 2521 635.4
A 7 223 85763 131.0 2585 2521 635.4
A 13 248 60999 92.03 2585 2521 635.4
B 5 185 506286 929.87 2545 2445 541.8
B 7 252 400784 735.16 2545 2445 541.8
B 2 249 220120 401.73 2545 2445 541.8
C 9 38 7052057 10762.48 2415 2384 655.0
C 15 224 4211000 6425.14 2415 2384 655.0
C 12 2 186115 280.49 2415 2384 655.0
D 12 110 5470751 7856.68 2474 2366 696.0
D 2 62 1904153 2732.38 2474 2366 696.0
D 2 153 645289 923.72 2474 2366 696.0

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