ASTROSAT CZTI

Data Quality Report

Orbit 20170606_C02_042T01_9000001278_level2

Creation date: 2025-11-14T01:12:58.132701
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/AS1C02_042T01_9000001278cztM0_level2.fits modeM0/AS1C02_042T01_9000001278cztM0_level2_quad_clean.evt
Size (bytes)755,792,640809,697,600
Size720.8 MB 772.2 MB
Events in quadrant A4,525,2264,915,376
Events in quadrant B4,429,4774,952,690
Events in quadrant C4,490,5664,752,137
Events in quadrant D3,841,2784,302,144

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01883100
B01703960
C01670260
D01851630

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01470
B01460
C01450
D01450

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A016400
B016660
C016580
D016590

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8169112161.488536%
B8180410561.290890%
C817456970.852652%
D8159820892.560112%

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 97612 82728 0 0 0.00% 0.00%
B 97611 82775 0 0 0.00% 0.00%
C 97611 82718 0 0 0.00% 0.00%
D 97612 82591 0 0 0.00% 0.00%

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 14 188 4654 12.11 1176 1101 293.4
A 0 29 4373 11.15 1176 1101 293.4
A 14 204 4058 10.08 1176 1101 293.4
B 2 9 3867 12.1 1169 1115 227.5
B 14 254 3021 8.38 1169 1115 227.5
B 12 226 2979 8.19 1169 1115 227.5
C 1 80 3327 7.2 1185 1099 309.3
C 1 81 3297 7.11 1185 1099 309.3
C 12 241 3248 6.95 1185 1099 309.3
D 3 14 2836 6.24 1096 994 294.9
D 6 231 2794 6.1 1096 994 294.9
D 7 5 2760 5.99 1096 994 294.9

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